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ORDER NO. MTNC050310C3
B01
Service Manual Color Television
Main Manual
Panasonic
Models Chassis
CT-Z1425 TMC573
'CT-Z1425
'CT-Z1425
This service manual is issued as a service guide for the model listed above.
Included in this manual are a set of schematic, block diagrams, functional descriptions, alignment procedures,
disassembly procedures and a complete parts list.
"WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death."
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in this Main Manual.
© 2005 Panasonic Corporation of North America.
All rights reserved. Unauthorized copying
and distribution is a violation of law.
CONTENTS
CONTENTS ................................................................................................................................................. A1-1
Important Safety Notice ............................................................................................................................ A2-1
Service Notes ............................................................................................................................................. A2-2, A2-3
About lead free solder (PbF) .................................................................................................................... A2-4
GENERAL SPECIFICATIONS ................................................................................................................... A3-1~A3-5
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP ............................................................................................................ B-1
2. NOTE FOR THE REMOVAL OF THE MAIN PCB ............................................................................ B-1
SERVICE MODE LIST ................................................................................................................................ C-1
CONFIRMATION OF HOURS USED ......................................................................................................... C-1
WHEN REPLACING EEPROM (MEMORY) IC .......................................................................................... C-1
ELECTRICAL ADJUSTMENTS
1. BEFORE MAKING ELECTRICAL ADJUSTMENTS ......................................................................... D-1
2. BASIC ADJUSTMENTS .................................................................................................................... D-1, D-2
3. PURITY AND CONVERGENCE ADJUSTMENTS ........................................................................... D-3
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) ................... D-4
BLOCK DIAGRAM ...................................................................................................................................... E-1, E-2
PRINTED CIRCUIT BOARDS
MAIN/CRT .............................................................................................................................................. F-1~F-4
SCHEMATIC DIAGRAMS
MICON/CHROMA/TUNER ..................................................................................................................... G-1, G-2
TV POWER ............................................................................................................................................ G-3, G-4
DEFLECTION/CRT ................................................................................................................................ G-5, G-6
SOUND/AV ............................................................................................................................................. G-7, G-8
VOLTAGE LIST .......................................................................................................................................... H-1
WAVEFORMS ............................................................................................................................................. I-1, I-2
MECHANICAL EXPLODED VIEW ............................................................................................................. J-1
MECHANICAL REPLACEMENT PARTS LIST ......................................................................................... K1-1
ELECTRICAL REPLACEMENT PARTS LIST ........................................................................................... K2-1~K2-3
A1-1
Important Safety Notice
Special components are used in this television set which are important for safety. These parts are identified on the
schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is essential that
these critical parts are replaced with the manufacturer's specified replacement part to prevent X-ray radiation, shock,
fire or other hazards. Do not modify the original design without the manufacturer's permission.
Safety Precautions
General Guidelines
An Isolation Transformer should always be used Measure the resistance between the jumpered AC plug
during the servicing of a receiver whose chassis is not and expose metallic parts such as screwheads, antenna
isolated from AC power line. Use a transformer of terminals, control shafts, etc. If the exposed metallic
adequate power rating as this protects the technician part has a return path to the chassis, the reading should
from accidents resulting in personal injury from electrical be between 240k and 5.2M . If the exposed metallic
shocks. It will also protect the Receiver from being part does not have a return path to the chassis, the
damaged by accidental shorting that may occur during reading should be infinite.
servicing. Leakage Current Hot Check (Fig. 1)
When servicing, observe the original lead dress, Plug the AC cord directly into the AC outlet. Do not use
especially in the high voltage circuit. Replace all an isolation transformer during the check.
damaged parts (also parts that show signs of Connect a 1.5k 10 watt resistor in parallel with a
overheating.) 0.15µF capacitor between an exposed metallic part and
Always Replace Protective Devices, such as ground. Use earth ground, for example a water pipe.
fishpaper, isolation resistors and capacitors, and shields Using a DVM with a 1000 ohms/volt sensitivity or higher,
after servicing the Receiver. Use only manufacturer's measure the AC potential across the resistor.
recommended rating for fuses, circuits breakers, etc. Repeat the procedure and measure the voltage present
High potentials are present when this Receiver is with all other exposed metallic parts.
operating. Operation of the Receiver without the rear Verify that any potential does not exceed 0.75 volt RMS.
cover introduces danger for electrical shock. Servicing A leakage current tester (such a Simpson Model 229,
should not be performed by anyone who is not Sencore Model PR57 or equivalent) may be used in the
thoroughly familiar with the necessary precautions when above procedure, in which case any current measure
servicing high-voltage equipment. must not exceed 0.5 milliamp. If any measurement is out
Extreme care should be practiced when Handling the of the specified limits, there is a possibility of a shock
Picture Tube. Rough handling may cause it to implode hazard and the Receiver must be repaired and
due to atmospheric pressure. (14.7 lbs per sq. in.). Do rechecked before it is returned to the customer.
not nick or scratch the glass or subject it to any undue
pressure. When handling, use safety goggles and heavy AC VOLTMETER
gloves for protection. Discharge the picture tube by
shorting the anode to chassis ground (not to the cabinet COLD
WATER
or to other mounting hardware). When discharging PIPE
connect cold ground (i.e. dag ground lead) to the anode (GROUND)
with a well insulated wire or use a grounding probe.
0.15µF
Avoid prolonged exposure at close range to unshielded
areas of the picture tube to prevent exposure to X-ray
radiation. TO INSTRUMENT'S
The Test Picture Tube used for servicing the chassis at EXPOSED METAL 1500 ,10 W
the bench should incorporate safety glass and magnetic PARTS
shielding. The safety glass provide shielding for the tube Figure 1. Hot Check Circuit
viewing area against X-ray radiation as well as
X-ray Radiation
implosion. The magnetic shield limits the X-ray radiation
WARNING: The potential source of X-ray radiation in
around the bell of the picture tube in addition to the
the TV set is in the High Voltage section and the picture
restricting magnetic effects. When using a picture tube
test jig for service, ensure that the jig is capable of Note: It is important to use an accurate, calibrated high
handling 50kV without causing X-ray radiation. voltage meter.
Before returning a serviced receiver to the owner, Set the brightness and picture controls to Minimum.
the service technician must thoroughly test the unit to Measure the High Voltage. The high voltage should be
ensure that is completely safe to operate. Do not use a 24.5 ± 1.0kV. If the upper limit is out of tolerance,
line isolation transformer when testing. immediate service and correction is required to insure
Leakage Current Cold Check safe operation and to prevent the possibility of
Unplug the AC cord and connect a jumper between the premature component failure.
two plug prongs.
A2-1
Service Notes
Note: These components are affixed with glue. Be careful not to break or damage any foil under the
component or at the pins of the ICs when removing. Usually applying heat to the component for a
short time while twisting with tweezers will break the component loose.
Leadless Chip Component How to Replace Flat-IC
(surface mount) - Required Tools -
Chip components must be replaced with identical chips
due to critical foil track spacing. There are no holes in Soldering iron De-solder braids
the board to mount standard transistors or diodes. Some Needle nose pliers Magnifier
chips capacitor or resistor board solder pads may have Wire cutters (sharp & small)
holes through the board, however the hole diameter limits 1. Cut the pins of a defective IC with wire cutters.
standard resistor replacement to 1/8 watt. Standard Remove IC from board. If IC is glued to the board,
capacitor may also be limited for the same reason. It is heat the IC and release the IC. See Note above.
recommended that identical components be used. Flat IC
Chip resistor have a three digit numerical resistance code
- 1st and 2nd significant digits and a multiplier.
Example: 162 = 1600 or 1.6k resistor, 0 = 0 (jumper).
Chip capacitors generally do not have the value indicated 2. Using soldering iron and needle nose pliers remove
on the capacitor. The color of the component indicates the the IC pins from the board.
general range of the capacitance.
Chip transistors are identified by a two letter code. The
first letter indicates the type and the second letter, the
grade of transistor.
Chip diodes have a two letter identification code as per the Soldering
code chart and are a dual diode pack with either common Iron
anode or common cathode. Check the parts list for correct
diode number. 3. Using de-soldering braid and soldering iron remove
solder from affected are on board (pads).
Component Removal
De-soldering
1. Use solder wick to remove solder from component end Braid
caps or terminal.
Soldering
2. Without pulling up, carefully twist the component with
Iron
tweezers to break the adhesive.
3. Do not reuse removed leadless or chip components 4. Position the new Flat-IC in place (apply the pins of
since they are subject to stress fracture during the Flat-IC to the soldering pads where the pins
removal. need to be soldered). Determine the positions of
the soldering pads and pins by correctly aligning
Chip Component Installation
the polarity symbol. Solder pin #1 first, align the IC.
1. Put a small amount of solder on the board soldering
pads. Polarity 2nd solder
1st solder
2. Hold the chip component against the soldering pads symbol
with tweezers or with a miniature alligator clip and
apply heat to the pad area with a 30 watt iron until
solder flows. Do not apply heat for more than 3 Solder the pin opposite to pin #1. This will assist
seconds. positioning the IC.
Chip Components 5. Solder all pins to the soldering pads using a fine
tipped soldering iron.
TYPE SOLDER
GRADE CAPS
C
Soldering
Solder
Iron
B
6. Check with a magnifier for solder bridge between
E
TRANSISTOR CAPACITOR the pins or for dry joint between pins and soldering
1ST DIGIT 2ND DIGIT pads. To remove a solder bridge, use a de-solder
COMMON braid as shown in the figure below.
CATHODE MULTIPLIER
=1600 = 1.6k De-Solder
Braid
Solder Soldering
ANODES SOLDER Bridge lron
CAPS
MH DIODE RESISTOR
A2-2
Service Notes (Continued)
IMPORTANT: To protect against possible damage to the WARNING: This Receiver has been designed to meet
solid state devices due to arcing or static discharge, make or exceed applicable safety and X-ray radiation
certain that all ground wires and CRT DAG wire are protection as specified by government agencies and
securely connected. independent testing laboratories.
CAUTION: The power supply circuit is above earth To maintain original product safety design standards
ground and the chassis cannot be polarized. Use an relative to X-ray radiation and shock and fire hazard,
isolation transformer when servicing the Receiver to avoid parts indicated with the symbol on the schematic
damage to the test equipment or to the chassis. Connect must be replaced with identical parts. Order parts from
the test equipment to the proper ground ( ) or ( ) when the manufacturer's parts center using the parts
servicing, or incorrect voltages will be measured. numbers shown in this service manual, or provide the
chassis number and the part reference number.
For optimum performance and reliability, all other parts
should be replaced with components of identical
specification.
A2-3
About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is Sn(Tin)+Ag(Silver)
+ Cu(Copper).
This model uses Pb Free solder in it's manufacture due to environmental conservation issues.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol stamped on the
front of PCB.
Caution
· Pb free solder has a higher melting point than standard solder. Typically the melting
point is 30 ~ 40 °C higher. Please use a high temperature soldering iron
and set it to 350 ± 5°C.
· Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the
pins or solder area before applying Pb solder. If this is not practical, be sure to heat the
Pb free solder until it melts, before applying Pb solder.
· After applying PbF solder to double layered boards, please check the component side
for excess solder which may flow onto the opposite side. (see figure below)
component component
pin
remove all of the
excess solder
slice view
solder
Suggested Pb free solder
There are several kinds of Pb free solder available for purchase. Although, this product can be
used only Sn+Ag+Cu(tin, silver, copper) solder
0.3mm X 100g 0.6mm X 100g 1.0mm X 100g
A2-4
GENERAL SPECIFICATIONS
G-1 TV CRT CRT Size / Visual Size 13 inch / 335.4mmV
System CRT Type Normal
Deflection 90 degree
Magnetic Field BV/BH +0.35G/0.18G
Color System NTSC
Speaker 1Speaker
Position Front
Size 1.5·~ 2.5 Inch
Impedance 8 ohm
Sound Output MAX 1.0 W
10%(Typical) 0.8 W
NTSC3.58+4.43 /PAL60Hz No
G-2 Tuning Broadcasting System US System M
System Tuner and System 1Tuner
Receive CH Destination USA(W/ CATV)
Tuning System F-Synth
Input Impedance VHF/UHF 75 ohm
2 - 69, 4A, A-5 - A-1,
CH Coverage A - I, J - W, W+1 - W+84
Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz
FP-FS 4.50MHz
Preset CH No
Stereo/Dual TV Sound No
Tuner Sound Muting Yes
G-3 Power Power Source AC 120V AC 60Hz
DC -
Power Consumption at AC
54 W at AC 120 V 60 Hz
Stand by (at AC) 3 W at AC 120 V 60 Hz
Per Year -- kWh/Year
Protector Power Fuse Yes
G-4 Regulation Safety UL
Radiation FCC
X-Radiation DHHS
G-5 Temperature Operation 0oC ~ +40oC
Storage -20oC ~ +60oC
G-6 Operating Humidity Less than 80% RH
A3-1
GENERAL SPECIFICATIONS
G-7 On Screen Menu Yes
Display Menu Type Picture(Matsusita Type)
Picture Yes
Contrast(Picture) Yes
Brightness Yes
Color Yes
Tint Yes
Sharpness Yes
Normal Yes
Audio No
Bass No
Treble No
Balance No
BBE On/Off No
Stable Sound On/Off No
SET UP Yes
Language Yes
Mode Yes
Auto Program Yes
Manual Program Yes
CC Yes
Timer Yes
Lock Yes
Exit Yes
CH Label No
Favorite CH No
Color Stream DVD/DTV No
Control Level Yes
Sound Yes
Brightness Yes
Contrast(Picture) Yes
Color Yes
Tint Yes
Sharpness Yes
Tuning No
Bass No
Treble No
Balance No
Back Light No
Stereo,Audio Output,SAP No
Video(Aux) Yes
Color Stream No
Channel(TV/Cable) Yes
CH Label No
Sound Mute Yes
V-chip Rating Yes
G-8 OSD Language English French Spanish
G-9 Clock and Sleep Timer Max Time 120 Min
Timer Step 10 Min
On/Off Timer Program(On Tim / Off Tim) No
Wake Up Timer No
Timer Back-up (at Power Off Mode) more than -- Min Sec
A3-2
GENERAL SPECIFICATIONS
G-10 Remote Unit RC-GP
Control Glow in Dark Remocon No
Format KASEIKYO
Custom Code 08-00 h
Power Source Voltage(D.C) 3V
UM size x pcs UM-3(AA) x 2 pcs
Total Keys 20 Keys
Keys Power Yes
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0 Yes
100 No
CH Up(UP) Yes
CH Down(DOWN) Yes
Volume Up(Right) Yes
Volume Down(Left) Yes
TV/Caption/Text No
CH1/CH2 No
TV/Video(TV/AV) Yes
CH RTN/CH ENT(Quick View) Yes
Sleep No
RE Call(Call) Yes
Reset No
Menu No
Enter No
Mute Yes
Action Yes
Exit No
MTS(Audio Select) No
Set + No
Set - No
G-11 Features Auto Degauss Yes
Auto Shut Off Yes
Canal+ No
CATV Yes
Anti-theft No
Rental No
Memory(Last CH) Yes
Memory(Last Volume) Yes
V-Chip Yes
Type USA,ORION Type
BBE No
Auto Search No
CH Allocation No
SAP No
Just Clock Function No
CH Label No
VM Circuit No
Full OSD No
Premiere No
Comb Filter No
Lines
Auto CH Memory Yes
Hotel Lock No
Closed Caption Yes
Stable Sound No
FBT Leak Test Protect Yes
CH Lock No
Video Lock No
Game Timer No
Power On Memory Yes
Energy Star Yes
Favorite CH No
A3-3
GENERAL SPECIFICATIONS
G-12 Accessories Owner's Manual Language Spanish
W/ Warranty No
Remote Control Unit Yes
Rod Antenna Yes
Poles 1Poles
Terminal
Loop Antenna No
Terminal -
U/V Mixer No
DC Car Cord (Center+) No
Guarantee Card No
Warning Sheet No
Circuit Diagram No
Antenna Change Plug No
Service Facility List No
Important Safety Instruction No
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet No
Battery Yes
UM size x pcs UM3(AA) x 2
OEM Brand Yes
AC Cord No
AV Cord (2Pin-1Pin) No
Registration Card (NDL Card) No
ESP Card No
PTB Sheet No
300 ohm to 75 ohm Antenna Adapter No
G-13 Interface Switch Front Power Yes
System Select No
Main Power SW No
Sub Power No
CH Up(UP) Yes
CH Down(DOWN) Yes
Volume Up(Right) Yes
Volume Down(Left) Yes
ACTION=Volume Up+Volume Down Yes
Rear AC/DC No
TV/CATV Selector No
Degauss No
Main Power SW No
Indicator Power No
Stand-by No
On Timer No
Terminals Front Video Input RCA
Audio Input RCA x 1
Other Terminal Ear Phone
Rear Video Input(Rear1) No
Video Input(Rear2) No
Audio Input(Rear1) No
Audio Input(Rear2) No
Video Output No
Audio Output No
Euro Scart No
Color Stream No
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input F Type
AC Outlet No
G-14 Set Size Approx. W x D x H (mm) 359.4 x 354 x 337
G-15 Weight Net (Approx.) 9.5 kg ( 20.9 lbs)
Gross (Approx.) 11.0kg ( 24.4lbs)
G-16 Carton Master Carton No
Content ---- Sets
Material -- /--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin No
Gift Box Yes
Material Double/White
Dimensions W x D x H(mm) 440 x 408 x 396
Design As per Buyer's
Description of Origin Yes
Natural Dropping At 1 Corner / 3 Edges / 6
Drop Test
Surfaces
Height (cm) 62
Container Stuffing 725 Sets/40' container
A3-4
GENERAL SPECIFICATIONS
G-17 Material Cabinet Cabinet Front PS 94V0 NONDECABROM
Cabinet Rear PS 94V0 NONDECABROM
PCB Non-Halogen Demand No
Eyelet Demand Yes
G-18 Environment Environmental standard requirement (by buyer) Green procurement of MATSUSHITA
Pb-free Phase3(Ph
A3-5
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP INSTALLATION
Read the following NOTED items before starting work. 1. Clean the spot where the cap was located with a small
amount of alcohol.
* After turning the power off there might still be a potential
voltage that is very dangerous. When removing the
Location of Anode Cap
Anode Cap, make sure to discharge the Anode Cap's
potential voltage.
* Do not use pliers to loosen or tighten the Anode Cap
terminal, this may cause the spring to be damaged.
REMOVAL
1. Follow the steps as follows to discharge the Anode Cap.
Connect one end of an Alligator Clip to the metal part of a
flat-blade screwdriver and the other end to ground.
While holding the plastic part of the insulated Screwdriver,
touch the support of the Anode with the tip of the NOTE
Screwdriver. Confirm that there is no dirt, dust, etc. at the spot where
A cracking noise will be heard as the voltage is discharged. the cap was located.
2. Arrange the wire of the Anode Cap and make sure the
wire is not twisted.
GND on the CRT
3. Turn over the Rubber Cap.
4. Insert one end of the Anode Support into the anode button,
then the other as shown in the figure below.
Screwdriver CRT
Support
Alligator Clip
GND on the CRT
2. Flip up the sides of the Rubber Cap in the direction of the Support
arrow and remove one side of the support. CRT
Rubber Cap 5. Confirm that the Support is securely connected.
6. Put on the Rubber Cap without moving any parts.
2. NOTE FOR THE REMOVAL OF THE
MAIN PCB
When the removal of the Main PCB, remove the hook
first, then draw it in the direction of the arrow.
CRT
Support
3. After one side is removed, pull in the opposite direction to
remove the other.
NOTE
Take care not to damage the Rubber Cap.
B-1
SERVICE MODE LIST
This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press both set key and remote control key for more than 1 second.
Set Key Remocon Key Operations
VOL. (-) MIN 0 Releasing of V-CHIP PASSWORD.
VOL. (-) MIN 1 Initialization of factory data.
NOTE: Do not use this for normal servicing.
If you set factory initialization, the memories are reset such as the clock
setting, the channel setting, the POWER ON total hours, and PLAY/REC
total hours.
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF HOURS USED".
VOL. (-) MIN 6
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
Writing of EEPROM initial data.
VOL. (-) MIN 8
NOTE: Do not use this for the normal servicing.
Display of the Adjustment MENU on the screen.
VOL. (-) MIN 9
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
CONFIRMATION OF HOURS USED
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
NOTE: If you set factory initialization, the total hours is reset to "0".
1. Set the VOLUME to minimum. ADDRESS DATA
2. Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 1 second.
INIT 00 50 Initial setting content of MEMORY IC.
3. After the confirmation of using hours, turn off the power.
CRT ON 0010 POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
FIG. 1 + (16 x tens digit value)
+ (ones digit value)
WHEN REPLACING EEPROM (MEMORY) IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
INI +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
00 50 04 FB 4C 46 B3 24 69 39 30 CC 05 90 D4 00 07
Table 1
1. Enter DATA SET mode by setting VOLUME to minimum.
2. While holding down VOLUME button on front cabinet, press key 6 on remote control for more than 1 second.
ADDRESS and DATA should appear as FIG 1.
3. ADDRESS is now selected and should "blink". Using the CH. UP/DOWN button on the remote, step through the
ADDRESS until required ADDRESS to be changed is reached.
4. Press VOL. UP/DOWN to select DATA. When DATA is selected, it will "blink".
5. Again, step through the DATA using CH. UP/DOWN button until required DATA value has been selected.
6. Pressing VOL. UP/DOWN will take you back to ADDRESS for further selection if necessary.
7. Repeat steps 3 to 6 until all data has been checked.
8. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
9. Turn POWER on.
10. While holding down VOLUME button on front cabinet, press key 1 on remote control for more than 1 second.
11. After the finishing of the initializing of shipping, the unit will turn off automatically.
C-1
ELECTRICAL ADJUSTMENTS
1. BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS
ADJUSTMENTS 2-1: CUT OFF (RF)
Read and perform these adjustments when repairing the 1. Adjust the unit to the following settings.
circuits or replacing electrical parts or PCB assemblies. R.DRIVE=10, B.DRIVE=10, R.BIAS=64, G.BIAS=64,
CAUTION B.BIAS=64, BRI.CENT=120, CONT.MAX=40.
2. Place the set in Aging Test for more than 15 minutes.
· Use an isolation transformer when performing any service 3. Activate the adjustment mode display of Fig. 1-1 and
on this chassis. press the channel button (01) on the remote control to
· Before removing the anode cap, discharge electricity select "CUT OFF".
because it contains high voltage. 4. Adjust the Screen Volume until a dim raster is obtained.
· When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire 2-2: FOCUS (RF)
back in its original position. 1. Receive a broadcast.
· When you exchange IC and Transistor with a heat sink, 2. Turn the Focus Volume fully counterclockwise once.
apply silicon grease (YG6260M) on the contract 3. Adjust the Focus Volume until picture is distinct.
section of the heat sink, Before applying new silicon
grease, remove all the old silicon grease. (Old grease 2-3: WHITE BALANCE (RF)
may cause damages to the IC and Transistor.)
· The adjustments are needed for each mode, RF mode and NOTE: Adjust after performing CUT OFF adjustment.
AV mode. Perform the adjustments refering each adjust- 1. Place the set in Aging Test for more than 10 minutes.
ment items. 2. Receive the white 100% signal from the Pattern
Generator.
Prepare the following measurement tools for electrical 3. Using the adjustment control, set the brightness and
adjustments. contrast to normal position.
4. Activate the adjustment mode display of Fig. 1-1 and
1. Synchro Scope
press the channel button (10) on the remote control to
2. Digital Voltmeter
select "R.BIAS".
5. Using the VOL. UP/DOWN button on the remote control,
On-Screen Display Adjustment
adjust the R.BIAS.
1. In the condition of NO indication on the screen. 6. Press the CH. UP/DOWN button on the remote control to
Press the VOL. DOWN button on the set and the select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".
Channel button (9) on the remote control for more than 7. Using the VOL. UP/DOWN button on the remote control,
1 second to appear the adjustment mode on the screen adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS.
as shown in Fig. 1-1. 8. Perform the above adjustments 6 and 7 until the white
color is achieved.
TV 2-4: SUB TINT/SUB COLOR (RF, AV)
1. Receive the color bar pattern. (RF Input)
2. Connect the oscilloscope to TP023.
3. Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "TINT".
00 OSD 19 4. Press the VOL. UP/DOWN button on the remote control
Fig. 1-1 until the section "A" becomes as straight line.
(Refer to Fig. 2-1)
2. Use the Channel UP/DOWN button or Channel button 5. Connect the oscilloscope to TP022.
(0-9) on the remote control to select the options shown 6. Activate the adjustment mode display of Fig. 1-1 and
in Fig. 1-2. press the channel button (19) on the remote control to
3. Press the ACTION button on the remote control to end select "COLOR CENT".
the adjustments. 7. Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 110 ±10% of the
NO. FUNCTION NO. FUNCTION white level. (Refer to Fig. 2-2)
00 OSD H 14 BRIGHT MAX 8. Receive the color bar pattern. (Audio Video Input)
01 CUT OFF 15 BRIGHT MIN 9. Press the TV/VIDEO button on the remote control to set
04 H.VCO 16 CONTRAST CENT to the AV mode. Then perform the above adjustments
05 H.PHASE 17 CONTRAST MAX 2~7.
06 V.SIZE 18 CONTRAST MIN
07 V.SHIFT 19 COLOR CENT
08 R.DRIVE 20 COLOR MAX
09 B.DRIVE 21 COLOR MIN
10 R.BIAS 22 TINT
11 G.BIAS 23 SHARPNESS
12 B.BIAS 28 TEST MONO
13 BRIGHT CENT 29 TEST STEREO
Fig. 1-2
D-1
ELECTRICAL ADJUSTMENTS
2-8: OSD HORIZONTAL (RF)
1. Activate the adjustment mode display of Fig. 1-1.
2. Press the VOL. UP/DOWN button on the remote
control until the difference of A and B becomes
minimum. (Refer to Fig. 2-3)
"A" TV
Fig. 2-1
00 OSD 19
A B Fig. 2-3
2-9: BRIGHT MANUAL (RF, AV)
1. Receive the black pattern*.
2. Using the adjustment control, set the brightness and
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and
White 100% Red 110%
Fig. 2-2 press the channel button (13) on the remote control to
select "BRIGHT CENT".
4. Press the VOL.UP/DOWN button on the remote control
2-5: HORIZONTAL PHASE (RF)
until the white 10% is starting to be visible.
1. Receive the center cross signal from the Pattern 5. Press the TV/VIDEO button on the remote to set to the
Generator. AV mode. Then perform the above adjustment 2~4.
2. Using the adjustment control, set the brightness and 6. Receive a broadcast and check if the picture is normal.
contrast to normal position.
3. Activate the adjustment mode display of Fig. 1-1 and *The Black Pattern means the whole black raster signal.
press the channel button (05) on the remote control to Select the "RASTER" of the pattern generator, set to the
select "H.PHASE". OFF position for each R, G and B.
4. Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on 2-10: SUB CONTRAST (RF, AV)
right and left becomes minimum. 1. Receive an 70dB the color bar pattern.
2. Activate the adjustment mode display of Fig. 1-1
2-6: VERTICAL SIZE (RF) press the channel button (17) on the remote control
1. Receive the cross hatch signal from the Pattern Generator. to select "CONTRAST MAX".
2. Using the adjustment control, set the brightness and 3. Press the VOL. UP/DOWN button on the remote control
contrast to normal position. until the contrast step No. becomes "44".
3. Activate the adjustment mode display of Fig. 1-1 and 4. Press the TV/VIDEO button on the remote control to set
press the channel button (06) on the remote control to to the AV mode.
select "V.SIZE". 5. Activate the adiustment mode display of Fig 1-1
4. Press the VOL. UP/DOWN button on the remote control press the channel button (17) on the remote control
until the SHIFT quantity of the OVER SCAN on upside to select"CONTRAST MAX".
and downside becomes 10 ± 2%. 6. Press the VOL.UP/DOWN button on the remote control
unitil the contrast step No. becomes "48".
2-7: VERTICAL SHIFT (RF) 7. Receive a broadcast and check if the picture is normal.
1. Receive the center cross signal from the Pattern Generator. 2-11: Confirmation of Fixed Value (step No.)
2. Using the adjustment control, set the brightness and
contrast to normal position. Please check if the fixed values of the each adjustment
3. Activate the adjustment mode display of Fig. 1-1 items are set correctly referring below. (RF/AV)
and press the channel button (07) on the remote NO. FUNCTION STEP NO.
control to select "V.SHIFT". 04 H VCO 04
4. Press the VOL. UP/DOWN button on the remote 14 BRIGHT MAX 140
control until the horizontal line becomes fit to the 15 BRIGHT MIN 60
notch of the shadow mask. 16 CONTRAST CENT 30
18 CONTRAST MIN 17
20 COLOR MAX 74
21 COLOR MIN 00
23 SHARPNESS 40