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Power Base-2 & 800CSL Amplifier Service Manual

POWER AMPLIFIER

SERVICE MANUAL
POWER BASE-2 & 800CSL
® TM

©1995 by CROWN INTERNATIONAL, INC.
Mailing Address: P.O. Box 1000 Elkhart, IN U.S.A. 46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN U.S.A. 46517

CSLTM is a trademark and Power Base-2,® ODEP,® and Crown® are registered trademarks of Crown International, Inc. K-SVCPB2 1-95

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Power Base-2 & 800CSL Amplifier Service Manual

Table of Contents
Introduction ............................................................. 4 Scope ...................................................................... 4 Warranty .................................................................. 4 Parts ........................................................................ 5 Specifications .......................................................... 6 Voltage Conversion ................................................. 7 Circuit Theory .......................................................... 8 Test Procedures .................................................... 13 Mechanical Parts Listing ....................................... 17 Module Information ............................................... 20 Q42647-0 Output Module (MT/MA) ...................... 21 Q42717-1 Output Module (MT/MA #2) .................. 22 Q42871-6 Output Module (TO-3P MT/MA) ........... 23 Q42966-4 Output Module (TO-3P #2) ................... 24 Q43015-9 Output Module (THC) ........................... 25 Q43203-1 Output Module (THC #2) ...................... 26 Q42665-2 Main Module (Original) ......................... 27 Q42683-5 Main Module (#2) ................................. 29 Q42818-3 Main Module (3rd Gain) ....................... 31 Q43059-7 Main Module (THC) .............................. 34

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Power Base-2 & 800CSL Amplifier Service Manual

Specifications
Unless noted otherwise, all specifications are based on driving an 8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally 3 years). Because our testing methods are more stringent than our published specifications, every Crown amplifier will exceed its published specifications. Input Impedance: Nominally 20K ohms balanced; 10K ohms unbalanced. Output Impedance: <10 milliohms in series with <2 microhenries. Protection Systems: Output Device Emulation Protection (ODEP) limits drive in the event of dangerous dynamic thermal conditions without interrupting power. Current limiting for shorted load protection. DC/LF and common mode output current Fault circuitry to mute audio. Delay of 4 seconds from turn on mutes amplifier to prevent dangerous turn-on transients. High voltage fuse in main transformer primary and low voltage fuse in fan primary. Slew rate limiting to prevent RF burn out.

POWER
Power 8 Ohm Stereo--320W/Ch 4 Ohm Stereo--400W/Ch 8 Ohm Bridge Mono--965W 4 Ohm Parallel Mono--680W 2 Ohm Parallel Mono--955W Load Impedances: Rated for 16, 8, 4, and 2 (parallel mono only) Ohm operation; safe with all types of loads, even totally reactive loads. AC Mains: 120VAC at 60 Hz with standard 3 wire grounded 15A connector with single voltage transformer and fan for North American units; 100VAC, 120VAC, 220VAC, and 240VAC at 50 or 60 Hz when equipped with universal transformer, applicable fan, and other applicable hardware with country specific power cord. Note that at 50 Hz fan speed is reduced.

MECHANICAL
Input Connectors: Balanced 1/4 inch phone jacks. Output Connectors: Color-coded 5-way binding posts on 3/4 inch centers; spaced 3/4 inch apart. Front Panel Controls: A rocker on/off power switch. Back Panel Controls: A three-position switch which selects Stereo, Bridge-Mono, or Parallel-Mono mode; a two position input ground-lift switch, and level controls for each channel. Internal Controls: A three-position switch selects 0.775V, 1.4V, or 26 dB voltage gain input sensitivity (all units manufactured with D 7911-7 main module or later; earlier models only allowed for 0.775V or 26 dB gain). Indicators: Red Enable indicator shows on/off status of low-voltage power supply. Construction: Black splatter-coat steel chassis with specially designed flow-through ventilation system. Mounting: Standard EIA 310 front-panel rack mount with supports for supplemental rear corner mounting. Dimensions: 19 inches wide, 3.5 inches high, 16 inches deep behind front mounting surface. Weight: 32 lbs.

PERFORMANCE
Frequency Response: ±0.1dB from 20 Hz to 20 kHz at 1 Watt. Phase Response: ±10° from 10 Hz to 20 kHz at 1 Watt. Signal to Noise Ratio: Better than 105 dB (A-weighted) below max. average power from 20 Hz to 20 kHz. Total Harmonic Distortion (THD): <0.05% from 20 Hz to 1 kHz, increasing linearly to 0.1% at 20 kHz at 170W. I.M. Distortion: <0.05% from 10 milliwatts to 170W at 26 dB gain. Slew Rate: >13V per microsecond. Damping Factor: >1000 from 10 Hz to 400 Hz. DC Offset: <10 millivolts.

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Power Base-2 & 800CSL Amplifier Service Manual

Voltage Conversion
PB/CSL Universal Fuse Board P16 P10 P15 P5 P6 100V Connections: P10 to P15 P11 to P14 P7 to P12 120V Connections: P10 to P16 P11 to P14 P7 to P13 220V Connections: P10 to P15 P9 to P14 P8 to P13 240V Connections: P10 to P16 P9 to P14 P8 to P13 For list of applicable transformer, fuse F100, fanformer, and power cord refer to voltageparts cross-reference.

P9 P8

P14

P4

P13 P7 P12

P3 P2

BLU BRN

P19 P11 P20 P1

P22

F100 P18 P17

F1

P21

S1 Power Switch

Specific parts are required for the PB-2/800CSL in order to be used at different international line voltages. Refer also to Mechanical Parts Lists. 100 to 120V AC Mains: 20A Fuse 0.5A Low Voltage Supply Fuse Power Transformer (Universal) Power Transformer (United States) Transmotor 120V 50 Hz Transmotor 120V 60 Hz 220V to 240V AC Mains: 10A Fuse 0.5A Low Voltage Supply Fuse Power Transformer Transmotor 120V 50Hz A10285-28 A10285-7 D 7599-0 D 6748-4 H43338-5 H43065-4 A10285-26 A10285-7 D 7599-0 H43338-5 7

Note: The only versions of this product produced at the Crown Factory with international voltage capabilities built in are CSL versions built specifically for sale outside the United States.

Power Base-2 & 800CSL Amplifier Service Manual

Theory
OVERVIEW
It should be noted from the outset that the PB-1 and 460CSL amplifiers are electrically and mechanically identical products. The only differences, from a service perspective, are cosmetic. For the purposes of servicing the products, it should also be known that the CSL version has been on the market since 1992. Since the PB amplifiers have been in production since the mid-1980's there are a number of electrical and mechanical parts associated with the older PB models only. It is also important to realize that over time Crown has introduced numerous improvements to PB/CSL amplifiers. Though often changes are minor, and are made for a variety of reasons, a few changes have had a significant impact on the operation of the circuitry. This manual is up to date as of the time of writing. For additional information regarding these amplifiers, refer to the applicable Technical Notes provided by Crown for this product. This section of the manual explains the general operation of a typical Crown power amplifier. Topics covered include Front End, Grounded Bridge, and ODEP. Due to variations in design from vintage to vintage (and similarities with other products Crown) the theory of operation remains simplified. clude a single core transformer (one primary with two independent ungrounded secondaries), a full time full speed fan which also serves as the low voltage transformer, slew rate limiting, and audio muting for delay or protective action. This amplifier can operate in either a Bridged or Parallel Mono mode as well as dual (stereo). A sensitivity switch allows selection of input voltage required for rated output. Level controls are rear mounted. The only indicator provided tells the operator that the low voltage supply is energized. In general, the packaging of this model is designed for maximum watt/price/weight/size value. It is the most basic grounded bridge amplifier series now available from Crown. For additional details refer to the specification section, or to the applicable Owner's Manual.

FRONT END OPERATION
The front end is comprised of three stages: Balanced Gain Stage (BGS), Variable Gain Stage (VGS), and the Error Amp. Figure 1 shows a simplified diagram of a typical front end with voltage amplification stages. Balanced Gain Stage (BGS) Input to the amplifier is balanced. The shield may be isolated from chassis ground by an RC network to interrupt ground loops (early models did not have the Ground Lift feature) via the Ground Lift Switch. The non-inverting (hot) side of the balanced input is fed to the non-inverting input of the first op-amp stage. The inverting (negative) side of the balanced input is fed to the inverting input of the first op-amp stage. A potentiometer is provided for common mode rejection adjustment. Electrically, the BGS is at unity gain. (From an audio perspective, however, this stage actually provides +6dB gain if a fully balanced signal is placed on its input.) The BGS is a non-inverting stage. It's output is delivered to the Variable Gain Stage. Variable Gain Stage (VGS) Note: Older models only had two front end stages. The functions of this stage were combined, primarily, with those of the third. From the output of the BGS, the signal goes to the VGS where gain is determined by the position of the Sensitivity Switch, and level is determined by the level control. VGS is an inverting stage with the input being fed to its op-amp stage. Because gain after this stage is fixed at 26dB (factor of 20), greater amplifier sensi-

FEATURES
Power Base/CSL amplifiers utilize numerous Crown innovations including grounded bridge and ODEP technologies. Cooling techniques make use of the what is essentially air conditioner technology. Air flows bottom to top, and front to side. Air flows a short distance across a wide heatsink. This type of air flow provides significantly better cooling than the "wind tunnel" technology used by many other manufacturers. Output transistors are of the metal can type rather than plastic case. This allows for a significantly higher thermal margin for the given voltage and current ratings. All devices used are tested and graded to ensure maximum reliability. Another electronic technique used is negative feedback. Almost all power amplifiers utilize negative feedback to control gain and provide stability, but Crown uses multiple nested feedback loops for maximum stability and greatly improved damping. Most Crown amplifiers have damping in excess of 1000 in the bass frequency range. This feedback, along with our compensation and ultra-low distortion output topology, make Crown amplifiers superior. Features specific to the Power Base/CSL Series' in8

Power Base-2 & 800CSL Amplifier Service Manual

Theory
tivity is achieved by controlling the ratio of feedback to input resistance. The Sensitivity Switch sets the input impedance to this stage and varies the gain such that the overall amplifier gain is 26 dB, or is adjusted appropriately for 0.775V or 1.4V input to attain rated output. Note that earlier models (before main modules built with D 7911-7 board) did not support the 1.4V sensitivity. Error Amp The inverted output from the VGS is fed to the noninverting input of the Error Amp op-amp stage through an AC coupling capacitor and input resistor. Amplifier output is fed back via the negative feedback (NFb) loop resistor. The ratio of feedback resistor to input resistor fixes gain from the Error Amp input to the output of the amplifier at 26 dB. Diodes prevent overdriving the Error Amp. Because the Error Amp amplifies the difference between input and output signals, any difference in the two waveforms will produce a near open loop gain condition which in turn results in high peak output voltage. The output of the Error Amp, called the Error Signal (ES) drives the Voltage Translators. Voltage Translators A voltage divider network splits the Error Signal (ES) into positive and negative drive signals for the balanced voltage translator stage. These offset reference voltages drive the input to the Voltage Translator transistors. A nested NFb loop from the output of the amplifier mixes with the inverted signal riding on the offset references. This negative feedback fixes gain at the offset reference points (and the output of the Error Amp) at a factor of -25.2 with respect to the amplifier output. The Voltage Translators are arranged in a common base configuration for non-inverting voltage gain with equal gain. They shift the audio from the ±15V reference to VCC reference. Their outputs drive their respective LVA. Also tied into the Voltage Translator inputs are ODEP limiting transistors and control/protection transistors. The ODEP transistors steal drive as dictated by the ODEP circuitry (discussed later). The control/protection transistors act as switches to totally shunt audio to ground during the turn-on delay, or during a DC/LF or Fault protective action. Last Voltage Amplifiers (LVAs) The Voltage Translator stage channels the signal to the Last Voltage Amplifiers (LVA's) in a balanced configuration. The +LVA and -LVA, with their push-pull effect through the Bias Servo, drive the fully complementary output stage. The LVAs are configured as common emitter amplifiers. This configuration provides sufficient voltage gain and inverts the audio. The polarity inversion is necessary to avoid an overall polarity inversion from input jack to output jack, and it

VOLTAGE AMPLIFICATION
The Voltage Translator stage separates the output of the Error Amp into balanced positive and negative drive voltages for the Last Voltage Amplifiers (LVAs), translating the signal from ground referenced ±15V to ±Vcc reference. LVAs provide the main voltage amplification and drive the High Side output stages. Gain from Voltage Translator input to amplifier output is a factor of 25.2.

+15V

BGS

VGS

Voltage Divider

Error Amp

Voltage Translators
Q100 Q121 Q101 Q102 Q103 Q122

+VCC

Q105

Audio Inputs

+ -

+ -

+ -

NPN Outputs (+HS) PNP Outputs (-HS)
Q110

-15V

ODEP

-+

Mute NFb Loop

-VCC

LVA's

Figure 1. Typical Amplifier Front End and Voltage Amplification Stages. 9

Power Base-2 & 800CSL Amplifier Service Manual

Theory
allows the NFb loop to control Error Amp gain by feeding back to its non-inverting input (with its polarity opposite to the output of the VGS). With the added voltage swing provided by the LVAs, the signal then gains current amplification through the Darlington emitter-follower output stage. The output of the +LVA drives the base of predriver device. Together, the predriver and driver form the first two parts of the three-deep Darlington and are biased class AB. They provide output drive through the bias resistor, bypassing the output devices, at levels below about 100mW. An RLC network between the predriver and driver provide phase shift compensation and limit driver base current to safe levels. Output devices are biased class B, just below cutoff. At about 100mW output they switch on to conduct high current to the load. Together with predriver and driver, the output device provide an overall class AB+B output. The negative half of the HS is almost identical to the positive half, except that the devices are PNP. One difference is that the PNP bias resistor is slighter greater in value so that PNP output devices run closer to the cutoff level under static (no signal) conditions. This is because PNP devices require greater drive current. HS bias is regulated by Q18, the Bias Servo. Q18 is a Vbe multiplier which maintains approximately 3.3V Vce under static conditions. The positive and negative halves of the HS output are in parallel with this 3.3V. With a full base-emitter on voltage drop across predrivers and drivers, the balance of voltage results in approximately .35V drop across the bias resistors in

GROUNDED BRIDGE TOPOLOGY
Figure 2 is a simplified example of the grounded bridge output topology. It consists of four quadrants of three deep Darlington (composite) emitter-follower stages per channel: one NPN and one PNP on the High Side of the bridge (driving the load), and one NPN and one PNP on the Low Side of the bridge (controlling the ground reference for the rails). The output stages are biased to operate class AB+B for ultra low distortion in the signal zero-crossing region and high efficiency. High Side (HS) The High Side (HS) of the bridge operates much like a conventional bipolar push-pull output configuration. As the input drive voltage becomes more positive, the HS NPN conducts and delivers positive voltage to the load. Eventually the NPN devices reach full conduction and +Vcc is across the load. At this time the HS PNP is biased off. When the drive signal is negative going, the HS PNP conducts to deliver -Vcc to the load and the HS NPN stage is off.

+
+Vcc (Positive Rail)

Input signal

Load (speaker)

Inverting Op-amp LOW SIDE

HIGH SIDE

-Vcc (Negative Rail)

-

Figure 2. Crown Patented Grounded Bridge Topology 10

Power Base-2 & 800CSL Amplifier Service Manual

Theory
the positive half, and about .5V across the bias resistor in the negative half. Q18 conduction (and thus bias) is adjustable. A diode string prevents excessive charge build up within the high conduction output devices when off. Flyback diodes shunt back-EMF pulses from reactive loads to the power supply to protect output devices from dangerous reverse voltage levels. An output terminating circuit blocks RF on output lines from entering the amplifier through its output connectors. Low Side (LS) The Low Side (LS) operates quite differently. The power supply bridge rectifier is not ground referenced, nor is the secondary of the main transformer. In other words, the high voltage power supply floats with respect to ground, but ±Vcc remain constant with respect to each other. This allows the power supply to deliver +Vcc and -Vcc from the same bridge rectifier and filter as a total difference in potential, regardless of their voltages with respect to ground. The LS uses inverted feedback from the HS output to control the ground reference for the rails (±Vcc). Both LS quadrants are arranged in a three-deep Darlington and are biased AB+B in the same manner as the HS. When the amplifier output swings positive, the audio is fed to an op-amp stage where it is inverted. This inverted signal is delivered directly to the bases of the positive (NPN) and negative (PNP) LS predrivers. The negative drive forces the LS PNP devices on (NPN off). As the PNP devices conduct, Vce of the PNP Darlington drops. With LS device emitters tied to ground, -Vcc is pulled toward ground reference. Since the power supply is not ground referenced (and the total voltage from +Vcc to -Vcc is constant) +Vcc is forced higher above ground potential. This continues until, at the positive amplifier output peak, -Vcc = 0V and +Vcc equals the total power supply potential with a positive polarity. If, for example, the power supply produced a total of 70V from rail to rail (±35VDC measured from ground with no signal), the amplifier output would reach a positive peak of +70V. Conversely, during a negative swing of the HS output where HS PNP devices conduct, the op-amp would output a positive voltage forcing LS NPN devices to conduct. This would result in +Vcc swinging toward ground potential and -Vcc further from ground potential. At the negative amplifier output peak, +Vcc = 0V and -Vcc equals the total power supply potential with a negative polarity. Using the same example as above, a 70V supply would allow a negative output peak of 70V. In summary, a power supply which produces a total of 70VDC rail to rail (or ±35VDC statically) is capable of producing 140V peak-to-peak at the amplifier output when the grounded bridge topology is used. The voltage used in this example are relatively close to the voltages of the PB-1/460CSL. The total effect is to deliver a peak to peak voltage to the speaker load which is twice the voltage produced by the power supply. Benefits include full utilization of the power supply (it conducts current during both halves of the output signal; conventional designs require two power supplies per channel, one positive and one negative), and never exposing any output device to more than half of the peak to peak output voltage (which does occur in conventional designs). Low side bias is established by a diode string which also shunts built up charges on the output devices. Bias is adjustable via potentiometer. Flyback diodes perform the same function as the HS flybacks. The output of the LS is tied directly to chassis ground via ground strap.

OUTPUT DEVICE EMULATION PROTECTION (ODEP)
To further protect the output stages, a specially developed ODEP circuit is used. It produces a complex analog output signal. This signal is proportional to the always changing safe-operating-area margin of the output transistors. The ODEP signal controls the Voltage Translator stage by removing drive that may exceed the safe-operating-area of the output stage. ODEP senses output current by measuring the voltage dropped across LS emitter resistors. LS NPN current (negative amplifier output) and +Vcc are sensed, then multiplied to obtain a signal proportional to output power. Positive and negative ODEP voltages are adjustable via two potentiometers. Across ±ODEP are a PTC and a thermal sense (current source). The PTC is essentially a cutoff switch that causes hard ODEP limiting if heatsink temperature exceeds a safe maximum, regardless of signal level. The thermal sense causes the differential between +ODEP and ­ ODEP to decrease as heatsink temperature increases. An increase in positive output signal output into a load will result in ­ODEP voltage dropping; an increase in negative output voltage and current will cause +ODEP voltage to drop. A complex RC network between the 11

Power Base-2 & 800CSL Amplifier Service Manual

Theory
±ODEP circuitry is used to simulate the thermal barriers between the interior of the output device die (immeasurable by normal means) and the time delay from heat generation at the die until heat dissipates to the thermal sensor. The combined effects of thermal history and instantaneous dynamic power level result in an accurate simulation of the actual thermal condition of the output transistors.

+VOLTAGE TRANSLATOR BGS VGS ERROR AMP OUTPUT DEVICE EMULATION PROTECTION

+LVA -1

POSITIVE HIGH SIDE OUTPUT NPN STAGE

BALANCED INPUTS

-1

HIGH SIDE BIAS SERVO

-VOLTAGE TRANSLATOR

-LVA -1

NEGATIVE HIGH SIDE OUTPUT PNP STAGE

MAIN NEGATIVE FEEDBACK (NFb) LOOP

POSITIVE LOW SIDE OUTPUT NPN STAGE -1 LOW SIDE BIAS DIODE STRING NEGATIVE LOW SIDE OUTPUT PNP STAGE

INVERTING BRIDGE BALANCE

Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown)

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Power Base-2 & 800CSL Amplifier Service Manual

Checkout Procedures
GENERAL INFORMATION
The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the procedure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order. All tests assume that AC power is from a regulated 120 VAC source. Test equipment includes an oscilloscope, a DMM, a signal generator, loads, and I.M.D. and T.H.D. noise test equipment.

TEST 3: ODEP VOLTAGE ADJUSTMENT
Spec: Cold Bias Per Charts Below ±0.1V DC. Initial Conditions: Controls per standard, heatsink at room temperature 20 to 30°C (68 to 86°F). Note: This adjustment should normally be performed within 2 minutes of turn on from ambient (cold) conditions. If possible measure heatsink temperature, if not measure ambient room temperature. Use this information when referencing the chart below. The following is a list of ODEP Bias Voltages VS. Temperature. °F 66 68 70 72 74 76 77 78 80 82 84 86 88 90 92 94 °C 18.9 20.0 21.1 22.2 23.3 24.4 25.0 25.6 26.7 27.8 28.9 30.0 31.1 32.2 33.3 34.4 V­ODEP ­10.31 ­10.26 ­10.20 ­10.14 ­10.09 ­10.03 ­10.00 ­9.97 ­9.91 ­9.86 ­9.80 ­9.74 ­9.69 ­9.63 ­9.57 ­9.51 V+ODEP 11.41 11.36 11.30 11.24 11.19 11.13 11.10 11.07 11.01 10.96 10.90 10.84 10.79 10.73 10.67 10.61

STANDARD INITIAL CONDITIONS
Level controls fully clockwise. Stereo/Mono switch in Stereo. Sensitivity switch in 26 dB fixed gain position. It is assumed, in each step, that conditions of the amplifier are per these initial conditions unless otherwise specified.

TEST 1: DC OFFSET
Spec: 0 VDC, ±10 mV. Initial Conditions: Controls per standard, inputs shorted. Procedure: Measure DC voltage at the output connectors (rear panel). There is no adjustment for output offset. If spec is not met, there is an electrical malfunction. Slightly out of spec measurement is usually due to U104/U204 out of tolorance.

TEST 2: OUTPUT BIAS ADJUSTMENT
Spec: 300 to 320 mVDC. Initial Conditions: Controls per standard, heatsink temperature less than 40°C. Procedure: Measure DC voltages on the output module across R02, adjust R26 if necessary. Measure DC voltages on the output module across R21, adjust R23 if necessary. Repeat for second channel.

­ODEP Procedure: Measure pin 6 of U100 and, if necessary, adjust R121 to obtain V­ODEP as specified above. Measure pin 6 of U200 and, if necessary, adjust R221 to obtain V­ODEP as specified above. +ODEP Procedure: Measure pin 6 of U103 and, if necessary, adjust R132 to obtain V+ODEP as specified above. Measure pin 6 of U203 and, if necessary, adjust R232 to obtain V+ODEP as specified above.

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Power Base-2 & 800CSL Amplifier Service Manual

Checkout Procedures
TEST 4: AC POWER DRAW
Spec: 90 Watts maximum quiescent. Initial Conditions: Controls per standard. Procedure: With no input signal and no load, measure AC line wattage draw. If current draw is excessive, check for high AC line voltage or high bias voltage. Procedure: No Load. Inject a 1 kHz sine wave. With level controls fully clockwise you should see full gain. As controls are rotated counterclockwise, observe similar gain reduction in each channel. When complete, return level controls to fully clockwise position.

TEST 5: COMMON MODE REJECTION
Spec at 100 Hz: ­70 dB. Spec at 20 kHz: ­50 dB. Initial Conditions: Controls per standard. Procedure: No load. Inject a 0 dBu 100 Hz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than ­44 dBu. Inject a 0 dBu 20 kHz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than ­24 dBu. Adjust R921 or R1021, if necessary, to obtain the required measurements. (In older units the adjustments are done using N100/N200.)

TEST 9: CURRENT LIMIT
Spec: Current Limit at 20 ±2 Amps Initial Conditions: Controls per standard. Procedure: Load each channel to 1 Ohm. Inject a 1 kHz differentiated (or 10% duty cycle) square wave and increase output level until current limit occurs. Current limit should occur at 20 ±2 Amps. Observe clean (no oscillations) current clipping.

TEST 10: SLEW RATE & 10 KHZ SQUARE WAVE
Spec: >13V/µS. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 10 kHz square wave to obtain 40 volts peak-to-peak at each output. Observe the slope of the square wave. It should typically measure 17 to 25 V/µS. Also, the square wave must not include overshoot, ringing, or any type of oscillation.

TEST 6: VOLTAGE GAIN
Spec: ±3% when the Sensitivity Switch is set for 26dB gain, ±6% when the Sensitivity Switch is set for 0.775V or 1.4V sensitivity. Initial Conditions: Controls per standard. Procedure: No load connected. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 26 dB position. Measure 15.5 VAC ±0.07 VAC at the amplifier output. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 0.775V position. Measure 50.6 VAC ±1.5 VAC at the amplifier output. Inject a 1.4 VAC 1 kHz sine wave with the Sensitivity Switch in the 1.4V position. Measure 50.6 VAC ±1.5 VAC at the amplifier output. Return the Sensitivity Switch to the 26 dB position.

TEST 11: CROSSTALK
Spec: <33 mVAC at 20 kHz. Initial Conditions: Controls per standard. Short input of channel not driven. Procedure: 8 ohm load on each channel. Inject a 20 kHz sine wave into the Channel 1 input and increase output level to 46.9 VAC. Measure less than 40 mVAC at the output of Channel 2. Inject a 20 kHz sine wave into the Channel 2 input and increase output level to 46.9 VAC. Measure less than 40 mVAC at the output of Channel 1.

TEST 7: PHASE RESPONSE
Spec: ±10° at 1 Watt. Initial Conditions: Controls per standard, 8 ohm load on each channel. Procedure: Inject a 1 kHz sine wave and adjust for 1 Watt output (2.8 VAC). Check input and output signals against each other, input and output signals must be within 10° of each other.

TEST 12: OUTPUT POWER
Spec at 8 Ohm Stereo: 320W at 0.1% THD. Spec at 4 Ohm Stereo: 400W at 0.1% THD. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave and measure at least 50.6 VAC at the output of each channel. Load each channel to 4 ohms. Inject a 1 kHz sine wave and measure at least 40.0 VAC. All power measurements must be at less than 0.1% THD.

TEST 8: LEVEL CONTROLS
Spec: Level controlled by level controls. Initial Conditions: Controls per standard.

TEST 13: REACTIVE LOADS
Spec: No oscillations. Safe with all types of loads. Initial Conditions: Controls per standard.

14

Power Base-2 & 800CSL Amplifier Service Manual

Checkout Procedures
Procedure Capacitive: Load each channel to 8 ohms in parallel with 2 µF. Inject a 20 kHz sine wave with 30 VAC output for 10 seconds. Procedure Inductive: Load each channel to 8 ohms in parallel with 159 µHenries. Inject a 1 kHz sine wave with 15 VAC output for 10 seconds. Procedure Torture: Load each channel with the primary (red and black leads) of a DC-300A transformer (D 5781-6). Inject a 10 Hz sine wave at sufficient output level to cause 3 to 5 flyback pulses, for 10 seconds. Procedure Short: Inject a 60 Hz sine wave at 5 VAC. After establishing signal, short the output for 10 seconds.

TEST 15: LF PROTECTION
Spec: Amplifier mutes for low frequency. Initial Conditions: Controls per standard. Procedure: No load. Inject a 0.5 Hz 6 volt peak-to-peak square wave into each channel and verify that each channel cycles into mute.

TEST 16: SIGNAL TO NOISE RATIO
Spec: 100 dB (105 dB A-weighted) below rated 8 ohm power. Initial Conditions: Controls per standard. Short inputs. Procedure: Load each channel to 8 ohms. Measure less than 400 µV at the output of each channel (or ­100 dB from reference of +36.25 dBu).

TEST 14: ODEP LIMITING
Spec: No oscillation on ODEP Limiting wave form; either channel controls limiting in Parallel Mono Mode. Initial Conditions: Controls per standard; rag or other obstruction blocking fan so that it does not turn. Procedure: Load the amplifier to 4 ohms on each channel. Inject a 60 Hz sine wave and adjust for 35 Vrms at the output. After a few minutes observe a wave form similar to Figure 4. Remove the input signal from both channels and allow the amplifier to cool for a few minutes. Switch the amplifier to Parallel Mono and remove the load from Channel 1. Inject the signal into Channel 1 and observe that ODEP limiting occurs at the output of both channels. Remove the load from Channel 2, and install the load on Channel 1. Again, observe that both channels limit. Return all amplifier controls to standard initial conditions. Remove the fan obstruction.

TEST 17: TURN ON TRANSIENTS
Spec: No dangerous transients. Initial Conditions: Controls per standard. Procedure: From an off condition, turn on the amplifier and monitor the output noise at the time of turn on. Note: Turn on noise may increase significantly if the amplifier is cycled off and on.

TEST 18: TURN OFF TRANSIENTS
Spec: No dangerous transients. Initial Conditions: Controls per standard. Procedure: From an on condition, turn off the amplifier and monitor the output noise at the time of turn off. Note: Turn off noise may increase significantly if the amplifier is cycled off and on.

TEST 19: INTERMODULATION DISTORTION
Spec at 0 dB Output: 0.01%. Spec at ­35 dB Output: 0.05%. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a SMPTE standard IM signal (60 Hz and 7 kHz sine wave mixed at 4:1 ratio) at 320 Watts (41.0 VAC). With an IM analyzer measure less than 0.01% IMD. Repeat test at ­35 dB (reference 320 Watts or 41.0 VAC) and measure less than 0.05% IMD.

TEST 20: CLIPPING
Spec: No protective action during test. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave at each input and drive output 6 dB into clip for 10 seconds. The amplifier should not activate any protective circuits (ODEP, Fault, or LF Protection). Figure 4. ODEP Limiting Wave Form 15

Power Base-2 & 800CSL Amplifier Service Manual

Checkout Procedures
POST TESTING
After completion of testing, if all tests are satisfactory, the amplifier controls should be returned to the positions required by customer. If conditions are unknown or unspecified, factory settings are as follows: Level Controls: 9 to 11 O'Clock. Sensitivity Switch: 0.775V U.S., 1.4V International. Stereo/Mono Switch: Stereo. Ground Lift: Lift. Power: Off.

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Power Base-2 & 800CSL Amplifier Service Manual

Mechanical (Non-Module) Parts
SUPPLIMENTAL ITEMS
CPN D 4137-2 C 3342-0 A10087-71012 ITEM Nylon Thumbscrew Washer Feet, Black Self-Stick 10-32 .75 Machine (Rack Screw) QTY 4 4 4

120VAC/60HZ NORTH AMERICA PRODUCT ONLY
CPN A10089-10832 A10285-28 A10285-7 D 6748-4 A10089-10832 A10101-19 H42873-2 P10426-8 P10125-6 ITEM Screw, 8-32 2.0 Ph Machine Fuse, 20A 3AB (120V Units) Fuse, .5A AGC 1.25x.25 (LVPS) PB-2 Power Transformer Screw, 8-32 2.0 Ph Mach Washer, Fiber (XFMR Assby) Fanformer Assembly Fuse Board (International Only) Fuse Board (U.S. Only) QTY 4 1 1 1 4 2 1 1 1

FANFORMER MECHANICAL ASSEMBLY
CPN C 7062-0 C 9939-7 D 8439-8 ITEM Screw, 6-32-5/16 Flat Mach Fan Blade, 4 inch CCW Fan Bracket QTY 2 1 1

FILTER CAPACITOR MOUNTING ASSEMBLY (ONE PER CHANNEL)
CPN A10095-4 A10098-5 C 8433-2 C 8752-5 C 9870-4 D 6764-1 D 8438-0 ITEM Washer, #10 Ext. Lock Belleville Spring Washer C126/C226 10,000µF 110V D117/D217 35A 400V Bridge Rectifier Screw, 10-32-.38 Pan Washer, Shoulder Bracket, Capacitor Mounting QTY 2 2 1 1 2 2 1

FUSE BOARD ASSEMBLY
CPN C 5060-6 P10426-8 P10125-6 ITEM Fuse Clip, PC Mount #926 Fuse Board (International Only) Fuse Board (U.S. Only) QTY 4 1 1

LED ASSEMBLY
CPN C 4342-9 P10068B4 ITEM Enable LED, Amber LED Board QTY 1 1

17

Power Base-2 & 800CSL Amplifier Service Manual

Mechanical (Non-Module) Parts
OUTPUT ASSEMBLY (ONE PER CHANNEL)
CPN A10100-4 A10315-1 C 4751-1 C 5826-0 C 6492-0 C 7326-9 C 8573-5 C 8574-3 C 8813-5 C 9327-9 C 9491-9 D 7665-9 D 7666-7 D 7796-2 D 7797-0 D 8197-2 D 8264-0 F12019-0 M21324-5 ITEM Washer, #6 Flat Zinc Screw, 6-32-.56 Hex Washer Head NPN Output Device S100/S200 Thermal Sense LM334Z PNP Output Device Solder Lug, #6 Tin PNP Driver Device TO-3P NPN Driver Device TO-3P Q318/Q418 Bias Servo MPSA18/MPS8097 Rivet, Plastic Screw, 6-32-.312 Taptite Pan Ph Clip, TO-3P Mounting Bracket, TO-3P Heatsink Silpad Insulator Output Thru-Hole Pad Insulator Paper Shroud PTC Thermal Sensor Diode Heatsink Slug Heatsink, Aluminum Output Module (See Module List) QTY 2 12 4 1 4 2 2 2 1 2 13 2 2 1 1 1 1 1 2 1

BACK PANEL ASSEMBLY
CPN A10214-7 C 2823-0 D 7074-4 M21208J9 A10019-8 ITEM Strain Relief (Power Cord) Dual Binding Post Assembly Power Cord (3-14 15A USA) Back Panel Nut, #8 32-2 Captive QTY 1 1 1 1 2

CHASSIS FRONT ASSEMBLY
CPN A10031-1 A10090-70806 A10090-70808 A10101-5 A10110-70605 A10173-1 D 6944-9 D 8465J2 D 8501-5 D 8548-6 F11130-6 F11979J5 F12435J7 ITEM Nut, 8-32 Captive Screw, 8-32-.375 Mach Ph Oval (Grille) Screw, 8-32-.5 Mach Ph Oval Washer, Nylon (Grille) Screw, 6-32-.312 Taptite Ph (Cover) Clip, Grille Filter Air Filter End Cap Cover, Top Cover, Bottom Front Panel Overlay PB-2 Front Panel Overlay 800CSL Grille QTY 4 3 4 3 20 3 1 2 1 1 1 1 1

18

Power Base-2 & 800CSL Amplifier Service Manual

Mechanical (Non-Module) Parts
MAIN CHASSIS ASSEMBLY
CPN A10086-70806 A10094-3 A10094-6 A10094-8 A10099-5 A10109-10822 A10110-70812 A10192-1 C 1811-6 C 3163-0 C 6487-0 C 6912-7 C 6913-5 C 6914-3 C 8341-7 C 9491-9 C 9953-8 D 7600-6 D 7784-8 D 8002-4 D 8067-7 F10787J3 M21082J8 ITEM Screw, 8-32-.37 Mach Rd Ph Washer, #6 Black Star Washer, #8 Black Star Washer, #10 Tooth Lock Washer, #8 Nylon Shoulder Screw, 8-18-1.375 Pan Ph Screw, 8-32-.75 Taptite Pan Ph Snap Bushing .5 Tie Wrap Solder Lug #6 505 Power Switch 22A Rocker 2 Pole Tension Retainer Board Support Spacer Nut, 1 inch Spacer Nut, .75 inch Ferrite Bead Screw, 6-32-.312 Taptite Pan Screw, 6-20-.312 Taptite Pan Black Ground Strap (DBP to Chassis) Label, Sensitivity Switch Label, F2 Fuse Replacement Label, F1 Fuse Replacement Back Panel Plate Chassis Main Module (See Module List) QTY 2 3 4 10 4 2 2 4 4 1 1 2 2 2 2 4 6 1 1 1 1 1 1 1

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Power Base-2 & 800CSL Amplifier Service Manual

Module Information
MODULE HISTORY
Since its introduction in 1986, the PB-1 has gone through a number of updates and revisions. Over the course of its history some of these changes have resulted in upgrading to newer modules. What follows is a historical breakdown of PB-1 modules. It should also be noted that the 460CSL was introduced in 1992 and therefor modules obsoleted before that time were never used in the CSL version.

MAIN MODULES:
Q42665-2 Original Main Module for PB-2. No longer available. Q42683-5 Main #2 for PB-2. No longer available. Q42818-7 Third Gain Main Module. Same circuit board as the universal PC board used in MT-600/1200, MA-600/ 1200, and PB-1 (Q42776-7), except that PB-2 required some unique component values. Added third gain stage and ground lift switch. Can replace all older modules. Note that if this module is being used to replace an older module, you may have to slide the ground lift switch to the left (ground lift position) and clip off the plastic switch protrusion in order for the module to properly fit in the unit. Q43059-7 THC Main Module built on D 7993-5 circuit board. On this module the boost circuit has been deleted, the third position (1.4V) is added to the Sensitivity Switch, and additional fault circuitry has been added to the module. Although it is possible to modify any older unit to accept this module, it is recommended that the Q42818-7 be used to replace main modules in all older units, and this module be used only as a replacement for itself.

OUTPUT MODULES:
Q42647-0 Original Output Module. No longer available. Q42717-1 Output Module: 12 resistor small predriver. Last output module for PB-2 for use with TO-220 package driver transistors. Q42871-6 TO-3P Driver Output Module. Not for use in THC units, not retrofittable into TO-220 driver transistor units. Q42966-4 TO-3P Driver #2 Output Module. Not for use in THC units, not retrofittable into TO-220 driver transistor units. May replace this or Q42871-6 only. Q43015-9 THC Output Module with TO-3P drivers. Not retrofittable to any older units. Does not require special main module for THC ODEP recompensation. Also improved bias stability. Q43203-1 THC #2 Output Module. Replaces Q42967-2 only. Electrically identical, but larger screw head plates prevent shorting which could occur with the first THC output module.

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Power Base-2 & 800CSL Amplifier Service Manual

Q42647-0 Output Module Parts List (P10137-1 Board)
Q42647-0 Output Module (MT/MA Original) for PB-2:

RESISTORS
R00 R01 R02 R03 R04 R06 R07 R09 R10 R11 R12 R13 R14 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R30* A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-2R73 A10266-7501 A10266-2R73 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201* 75 470 5.6 flame proof .2 5W .2 5W .2 5W .2 5W 22 flame proof 470 2.7 1W 2.7 1W 75 2.7 1W .2 5W .2 5W .2 5W .2 5W 5.6 flame proof 22 flame proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 102*

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3 .047µF .1µF .1µF .0047µF .001µF .01µF .001µF 220pF 180pF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 Output Coil 470µH 470µH

MISC.
Board Jumpers Clips J500 J600 P10137-1 C 5868-2 D 6414-3 C 7057-0 0 Ohm Jumper (8) Q17/19 Hold Down 10 Pos. Connector

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43 PNP MPSA93

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q42717-1 Output Module Parts List (P10233-8 Board)
Q42717-1 Output Module (MT/MA #2) for PB-2:

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 3218-2 C 3218-2 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 .047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 Output Coil 470µH 470µH

R06 R07 R08 R09 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W 22 .5W Flame Proof 470 2.7 1W 12 2W 75 12 2W .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 .5W Flame Proof 22 .5W Flame Proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

MISC.
Board Jumpers Clips J500 J600 P10233-8 C 5868-2 D 6414-3 C 7057-0 0 Ohm .25W Q17/Q19 Hold Down 10 Pin Header

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43 PNP MPSA93

RESISTORS
R00 R01 R02 R03 R04 R05 A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 75 470 5.6 .5W Flame Proof .2 5W .2 5W .2 5W

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q42871-6 Output Module Parts List (P10305-4 Board)
Q42871-6 Output Module (MT/MA TO-3P Driver) for PB-2/ 800CSL: R06 R07 R08 R09 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 .2 5W .2 5W .2 5W 22 flame proof 470 2.7 1W 12 2W 75 12 2W .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 flame proof 22 flame proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .01µF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 1.3µH Output Coil 470µH 470µH

MISC.
Board Jumpers Clips Beads J500 J600 P10305-4 C 5868-2 D 6414-3 C 8341-7 C 7057-0 0 Ohm .25W, Qty 7 Q17/Q19 Hold Down Emitter Q17/Q19 10 Pin Header

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43/42 PNP MPSA93

RESISTORS
R00 R01 R02 R03 R04 R05 A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 75 470 5.6 flame proof .2 5W .2 5W .2 5W

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q42966-4 Output Module Parts List (P10305-4 Board)
Q42966-4 Output Module (TO-3P Driver #2) for PB-2/ 800CSL: R06 R07 R08 R09 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 .2 5W .2 5W .2 5W 22 flame proof 470 2.7 1W 12 2W 75 12 2W .2 5W .2 5W .2 5W .2 5W .2 5W .2 5W 5.6 flame proof 22 flame proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF .01µF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 Output Coil 470µH 470µH

MISC.
Board Jumpers Clips J500 J600 BEAD P10305-4 C 5868-2 D 6414-3 C 7057-0 C 8341-7 0 Ohm Jumper (7) Q17/19 Hold Down 10 Pos. Connector Over emitter of Q19

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43 PNP MPSA93

RESISTORS
R00 R01 R02 R03 R04 R05 A10266-7501 A10266-4711 C 7778-1 C 6486-2 C 6486-2 C 6486-2 75 470 5.6 flame proof .2 5W .2 5W .2 5W

Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q43015-9 Output Module Parts List (P10341-9 Board)
Q43015-9 Output Module for Through Hole Chassis (THC) PB-2/800CSL units: R04 R06 R07 R09 R10 R11 R12 R13 R14 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40 C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 .2 5W .2 5W .2 5W 22 .5W Flame Proof 470 2.7 1W 12 2W 75 12 2W .2 5W .2 5W .2 5W .2 5W 5.6 .5W Flame Proof 22 .5W Flame Proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .01µF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 Output Coil 470µH 470µH

MISC.
Board Jumpers Clips J500 J600 P10341-9 C 5868-2 D 6414-3 C 7057-0 0 Ohm (Qty 8) Q17/Q19 Hold Down 10 Pin Header

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43 PNP MPSA93

RESISTORS
R00 R01 R02 R03 A10266-7501 A10266-4711 C 7778-1 C 6486-2 75 470 5.6 .5W Flame Proof .2 5W

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q43203-1 Output Module Parts List (P10397-1 Board)
Q43203-1 Output Module (THC #2) for PB-2/800CSL Units:

CAPACITORS
C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .01µF

DIODES
D01 D02 D03 D04 D05 D06 D07 D08 D09 D10 D11 D12 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004

INDUCTORS
L00 L01 L02 C 6592-6 C 3510-2 C 3510-2 Output Coil 470µH 470µH

R04 R06 R07 R09 R10 R11 R12 R13 R14 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30* R35 R36 R37 R38 R39 R40

C 6486-2 C 6486-2 C 6486-2 C 7779-9 A10266-4711 A10266-2R73 A10266-1204 A10266-7501 A10266-1204 C 6486-2 C 6486-2 C 6486-2 C 6486-2 C 7778-1 C 7779-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10266-5101 A10265-10201* A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204 A10266-1204

.2 5W .2 5W .2 5W 22 .5W Flame Proof 470 2.7 1W 12 2W 75 12 2W .2 5W .2 5W .2 5W .2 5W 5.6 .5W Flame Proof 22 .5W Flame Proof 250 Pot LS Bias 13K 2.2K 250 Pot HS Bias 390 13K 51 102* 12 2W 12 2W 12 2W 12 2W 12 2W 12 2W

MISC.
Board Jumpers Clips J500 J600 P10397-1 C 5868-2 D 6414-3 C 7057-0 0 Ohm (Qty 7) Q17/Q19 Hold Down 10 Pin Header

TRANSISTORS
Q17 Q19 C 3810-6 C 3578-9 NPN MPSA43 PNP MPSA93

RESISTORS
R00 R01 R02 R03 A10266-7501 A10266-4711 C 7778-1 C 6486-2 75 470 5.6 .5W Flame Proof .2 5W

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade. This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor (A10265-10701); if it is marked with a yellow dot then R30 should be a 100 Ohm resistor (A10265-10001).

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Power Base-2 & 800CSL Amplifier Service Manual

Q42665-2 Main Module Parts List (D 6910-0 Board)
Q42665-2 Main Module (Original) for PB-2:

CAPACITORS
C1 C2 C3 C4 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C133 C134 C135 C136 C137 C138 C139 C140 C141 C 4303-1 C 3913-8 C 4303-1 C 6802-0 C 5311-3 C 2821-4 C 6805-3 C 6805-3 C 6950-7 C 6950-7 C 6812-9 C 6803-8 C 6802-0 C 3729-8 C 3729-8 C 6802-0 C 6803-8 C 6812-9 C 6811-1 C 6811-1 C 6809-5 C 3729-8 C 3729-8 C 6803-8 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 5162-0 1000uF 470uF 1000uF .47uF 22uF 10pF .022uF .022uF 82pF 82pF 47pF .12uF .47uF 100uF 16V 100uF 16V .47uF .12uF 47pF 100pF 100pF 220pF 100uF 16V 100uF 16V .12uF 12pF .022uF .022uF 470pF 470pF 12pF 12pF 47pF 47pF 3-12pF Trim

C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C233 C234 C235 C236 C237 C238 C239 C240 C241 C242

D110 D111 D112 D113 D114 D115 D120 D121 D122 D123

D210 D211 D212 D213 D214 D215 D220 D221 D222 D223

C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4

1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070

NETWORK RESISTORS
N100 N101 N102 N200 N201 N202 D 4669-4 D 6081-0 D 6082-8 Balanced Input Trim Resistor Network-B Resistor Network-C

TRANSISTORS
Q100 Q101 Q102 Q103 Q104 Q105 Q106 Q107 Q108 Q109 Q110 Q111 Q112 Q113 Q115 Q116 Q117 Q118 Q119 Q120 Q200 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 Q209 Q210 Q211 Q212 Q213 Q215 Q216 Q217 Q218 Q219 Q220 D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 SEL 2N3859A MPSA93 MPSA43/A42 PN4250A 2N4125 MPSA93 2N4125 PN4250A SEL 2N3859A SEL 2N3859A MPSA43/A42 SEL 2N3859A 2N4125 2N4125 MPS8097 PN4250A SEL 2N3859A SEL 2N3859A 2N4125 2N4125

DIODES
D1 D2 D3 D4 D5 D6 D7 D104 D105 D106 D107 D108 D109 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148

RESISTORS
R1 R5 R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 A10265-10031 A10266-3323 C 6893-9 A10265-49911 A10266-1021 A10265-10031 A10266-2721 A10266-2721 A10266-1231 A10266-4731 A10266-1021 A10266-8201 A10266-4731 100K 1% 3.3K 1W 5K POT 4.99K 1K 100K 1% 2.7K 2.7K 12K 47K 1K 82 OHM 47K 27

D204 D205 D206 D207 D208 D209

Power Base-2 & 800CSL Amplifier Service Manual

Q42665-2 Main Module Parts List (D 6910-0 Board)
R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R154 R156 R157 R158 R159 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R254 R256 R257 R258 R259 A10266-1231 A10266-5131 A10266-4721 A10266-4721 A10266-5141 A10266-3351 A10266-4731 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1232 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031 C 5062-2 A10266-2741 A10266-1232 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-1021 A10266-8201 A10266-1541 A10266-1541 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 A10266-1011 A10266-1321 A10266-1321 A10266-9121 A10266-1031 12K 51K 4.7K 4.7K 510K 3.3M 47K 270 OHM 300 OHM 270 OHM 100K TRIMMER 270K 12K .5W 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K 100K TRIMMER 270K 12K .5W 100 OHM 6.8K 100 OHM 6.8K 1K 82 OHM 150K 150K 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K 100 OHM 1.3K 1.3K 9.1K 10K R161 R162 R165 R146 R167 R168 R170 R171 R261 R262 R265 R246 R267 R268 R270 R271 A10266-4701 A10266-4701 A10265-53611 A10265-53611 A10266-1021 A10265-95301 A10266-1021 A10265-95301 47 OHM 47 OHM 5.36K 1% 5.36K 1% 1K 953 OHM 1K 953 OHM

SWITCHES
S3 S100 C 6841-8 C 6781-6 4PDT 6P3T

IC'S
U1 U2 U100 U103 U104 U200 U203 U204 C 5095-2 C 5096-0 C 6911-9 C 6910-1 C 6900-2 MC7815 MC7915 UPA75 PNP UPA76 NPN MC34084P

MISC.
BOARD D 6304B2 J1 C 7593-4 J2 C 4508-5 J9 C 7527-2 J10 C 7592-6 J11 C 7077-8 J100 J200 C 6777-4 J500 J800 D 6619-7 J600 J700 D 6620-5 MOUNTS U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 MOUNTS U104, U204: (2) C 3450-1 COVERS FOR J100, J200: (2) C 6778-2 Additional Parts (1) C 7077-8 5 PIN HEADER 16 PIN SOCKET 6 PIN HEADER 4 PIN HEADER WIRE RETAINER PHONE JACK 10" RIBBON ASSY 6" RIBBON ASSY 6-32 NUT 6-32 X .5 SCREW HEATSINK STAR WASHER 14 Pin Socket Cover, Phone Jack 3-Cond Wire Retain

28

Power Base-2 & 800CSL Amplifier Service Manual

Q42683-5 Main Module Parts List (D 6910-0 Board)
Q42683-5 Main Module (#2) for PB-2:

CAPACITORS
C1 C2 C3 C4 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C152 C153 C 3913-8 C 3913-8 C 4303-1 C 6802-0 C 5311-3 C 2820-6 C 6805-3 C 6805-3 C 6812-9 C 6812-9 C 6814-5 C 6803-8 C 6802-0 C 3729-8 C 3729-8 C 6802-0 C 6803-8 C 6814-5 C 6811-1 C 6812-9 C 6812-9 C 3729-8 C 3729-8 C 7706-2 C 6814-5 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 5162-0 C 5362-6 C 6814-5 C 6809-5 C 6806-1 C 6810-3 C 6808-7 C 6809-5 C 5362-6 470uF 470uF 1000uF .47uF 22uF 5pF .022uF .022uF 47pF 47pF 12pF .12uF .47uF 100uF 16V 100uF 16V .47uF .12uF 12pF 100pF 47pF 47pF 100uF 16V 100uF 16V .1uF 12pF 12pF .022uF .022uF 470pF 470pF 12pF 12pF 47pF 47pF 3-12pF Trim 2.2uF 12pF 220pF .01uF 180pF 470pF 220pF 2.2uF

C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C233 C234 C235 C236 C237 C238 C239 C240 C241 C242 C244 C245 C246 C247 C248 C249 C252 C253

D5 D6 D7 D104 D105 D106 D107 D108 D109 D110 D111 D112 D113 D114 D115 D120 D121 D122 D123

D204 D205 D206 D207 D208 D209 D210 D211 D212 D213 D214 D215 D220 D221 D222 D223

C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4

1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070

NETWORK RESISTORS
N100 N101 N102 N200 N201 N202 D 4669-4 D 6081-0 D 6082-8 Balanced Input Trim Resistor Network-B Resistor Network-C

TRANSISTORS
Q100 Q101 Q102 Q103 Q104 Q105 Q106 Q107 Q108 Q109 Q110 Q111 Q112 Q113 Q115 Q116 Q117 Q118 Q119 Q120 Q121 Q200 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 Q209 Q210 Q211 Q212 Q213 Q215 Q216 Q217 Q218 Q219 Q220 Q221 D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 3786-8 SEL 2N3859A MPSA93 MPSA43/A42 PN4250A 2N4125 MPSA93 2N4125 PN4250A SEL 2N3859A SEL 2N3859A MPSA43/A42 SEL 2N3859A 2N4125 2N4125 MPS8097 PN4250A SEL 2N3859A SEL 2N3859A 2N4125 2N4125 PN4250A

DIODES
D1 D2 D3 D4 C 2851-1 C 2851-1 C 2851-1 C 2851-1 1N4004 1N4004 1N4004 1N4004

RESISTORS
R1 R4 R5 A10265-53621 53.6K 1% A10265-46421 46.4K 1% A10266-3323 3.3K 1W 29

Power Base-2 & 800CSL Amplifier Service Manual

Q42683-5 Main Module Parts List (D 6910-0 Board)
R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R153 R156 R157 30 R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R253 R256 R257 C 7409-3 A10265-49911 A10266-1021 A10265-10031 A10266-2721 A10266-2721 A10266-1231 A10266-6831 A10266-1021 A10266-8201 A10266-6831 A10266-1231 A10266-5131 A10266-4721 A10266-4721 A10266-5141 A10266-3351 A10266-4731 A10266-2711 A10266-3011 A10266-2711 C 5062-2 A10266-2741 A10266-1232 A10266-6821 C 7782-3 C 7782-3 A10266-6821 A10266-1031 A10266-1041 A10266-1041 A10266-1031 C 5062-2 A10266-2741 A10266-1232 C 7782-3 A10266-6821 C 7782-3 A10266-6821 A10266-1021 A10266-8201 A10266-1541 A10266-1541 A10266-1031 C 7781-5 A10266-2721 C 7781-5 A10266-2721 A10266-1031 A10266-1231 C 5869-2 A10266-1321 A10266-1321 5K POT 4.99K 1K 100K 1% 2.7K 2.7K 12K 68K 1K 82 OHM 68K 12K 51K 4.7K 4.7K 510K 3.3M 47K 270 OHM 300 OHM 270 OHM 100K TRIMMER 270K 12K .5W 6.8K 100 OHM 100 OHM 6.8K 10K 100K 100K 10K 100K TRIMMER 270K 12K .5W 100 OHM 6.8K 100 OHM 6.8K 1K 82 OHM 150K 150K 10K 200 OHM 2.7K 200 OHM 2.7K 10K 12K ZERO OHM 1.3K 1.3K R158 R159 R161 R162 R167 R168 R170 R171 R174 R175 R176 R177 R178 R179 R180 R181 R182 R183 R258 R259 R261 R262 R267 R268 R270 R271 R274 R275 R276 R277 R278 R279 R280 R281 R282 R283 A10266-9121 A10266-1031 A10266-4701 A10266-4701 A10266-1021 A10265-95301 A10266-1021 A10265-95301 A10265-38311 A10265-16911 A10266-1041 C 5062-2 A10266-1231 A10266-4731 A10266-4711 A10266-4721 A10266-2201 A10266-2051 9.1K 10K 47 OHM 47 OHM 1K 953 OHM 1K 953 OHM 3.83K 1% 1.69K 1% 100K TRIM POT 12K 47K 470 OHM 4.7K 22 OHM 2M

SWITCHES
S3 S100 C 7363-2 C 6781-6 4PDT 6P3T

IC'S
U1 U2 U100 U103 U104 U200 U203 U204 C 5095-2 C 5096-0 C 6911-9 C 6910-1 C 6900-2 MC7815 MC7915 UPA75 PNP UPA76 NPN MC34084P

INTERCONNECTS
J2 J9 J10 J11 J100 J500 J600 C 4508-5 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5 16 PIN SOCKET 6 PIN HEADER 4 PIN HEADER 3 PIN HEADER PHONE JACK 10" RIBBON ASSY 6" RIBBON ASSY

J200 J800 J700

MISC.
BOARD D 6910-0 MOUNTS U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 MOUNTS U104, U204: (2) C 3450-1 COVERS FOR J100, J200: (2) C 6778-2 STRAIN RELIEF: (4) C 1811-6 6-32 NUT 6-32 X .5 SCREW HEATSINK STAR WASHER 14 PIN SOCKET Phone Jack Cover CABLE TIE

Power Base-2 & 800CSL Amplifier Service Manual

Q42818-7 Main Module Parts List (D 7251-8 Board)
Q42818-7 Main Module (3rd Gain) for PB-2/800CSL:

DIODES
D1 D2 D3 D4 D5 D6 D7 D8 D9 D104 D105 D106 D107 D108 D109 D110 D111 D112 D113 D114 D115 D120 D121 D122 D123 D124 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3549-0 C 2851-1 C 2851-1 C 2851-1 C 2851-1 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 3181-2 C 5061-4 C 5061-4 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4004 1N4148 1N916B 10V 1N4004 1N4004 1N4004 1N4004 1N4148 1N4148 1N4148 1N3070 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N4148 1N3070 1N3070

CAPACITORS
C1 C2 C4 C5 C6 C7 C8 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C 3913-8 C 3913-8 C 6802-0 C 6806-1 C 6806-1 C 6094-9 C 6806-1 C 5311-3 C 2820-6 C 6805-3 C 6804-6 C 6812-9 C 6812-9 C 6814-5 C 6803-8 C 6802-0 C 8026-4 C 8026-4 C 6802-0 C 6803-8 C 6814-5 C 6811-1 C 6812-9 C 6812-9 C 8026-4 C 8026-4 C 7706-2 C 6813-7 C 6814-5 C 6805-3 C 6805-3 C 6808-7 C 6808-7 C 6814-5 C 6814-5 C 6812-9 C 6812-9 C 8026-4 C 6814-5 C 6809-5 C 6806-1 C 6810-3 C 6808-7 C 6809-5 C 6804-6 470uF 470uF .47uF .01uF .01uF 33uF .01uF 22uF 5pF .022uF .1uF 47pF 47pF 12pF .12uF .47uF 100uF 35V 100uF 35V .47uF .12uF 12pF 100pF 47pF 47pF 100uF 35V 100uF 35V .1uF 100V 27pF 12pF .022uF .022uF 470pF 470pF 12pF 12pF 47pF 47pF 100uF 35V 12pF 220pF .01uF 180pF 470pF 220pF .1uF

C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C247 C248 C249 C252 C253

D204 D205 D206 D207 D208 D209 D210 D211 D212 D213 D214 D215 D220 D221 D222 D223 D224

NETWORK RESISTORS
N100 N101 N102 N200 N201 N202 D 4669-4 D 6081-0 D 6082-8 Balanced Input Trim Resistor Network-B Resistor Network-C

TRANSISTORS
Q1 Q2 Q100 Q101 Q102 Q103 Q104 Q105 Q106 Q107 Q108 Q109 Q110 Q111 Q112 Q113 Q115 Q200 Q201 Q202 Q203 Q204 Q205 Q206 Q207 Q208 Q209 Q210 Q211 Q212 Q213 Q215 C 7458-0 C 3625-8 D 2961-7 C 3578-9 C 3810-6 C 3786-8 C 3625-8 C 3578-9 C 3625-8 C 3786-8 D 2961-7 D 2961-7 C 3810-6 D 2961-7 C 3625-8 C 3625-8 D 2962-5 2N4123 2N4125 SEL 2N3859A MPSA93 MPSA43/A42 PN4250A 2N4125 MPSA93 2N4125 PN4250A SEL 2N3859A SEL 2N3859A MPSA43/A42 SEL 2N3859A 2N4125 2N4125 MPS8097

31

Power Base-2 & 800CSL Amplifier Service Manual

Q42818-7 Main Module Parts List (D 7251-8 Board)
Q116 Q117 Q118 Q119 Q120 Q121 Q122 Q216 Q217 Q218 Q219 Q220 Q221 Q222 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 7458-0 C 7458-0 PN4250A SEL 2N3859A SEL 2N3859A 2N4125 2N4125 2N4123 2N4123 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R153 R156 R157 R158 R159 R161 R162 R167 R168 R170 R171 R174 R175 R176 R179 R180 R181 R182 R183 R185 R186 R187 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251 R252 R253 R256 R257 R258 R259 R261 R262 R267 R268 R270 R271 R274 R275 R276 R279 R280 R281 R282 R283 R285 R286 R287 A10266-1231 C 778