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Ver. 1

SERVICE MANUAL
MODEL JP E3 E2 EK E2A E2C E1K EUT

DN-F300

PROFESSIONAL SOLID STATE PLAYER

For purposes of improvement, specifications and design are subject to change without notice.

Please use this service manual with referring to the operating instructions without fail.

Some illustrations using in this service manual are slightly different from the actual set.

X0443 V.01 DE/CDM 0909
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.

CAUTION Please heed the points listed below during servicing and inspection.

Heed the cautions! Inspect for safety after servicing!
Spots requiring particular attention when servicing, such Check that all screws, parts and wires removed or discon-
as the cabinet, parts, chassis, etc., have cautions indicated nected for servicing have been put back in their original po-
on labels or seals. Be sure to heed these cautions and the sitions, inspect that no parts around the area that has been
cautions indicated in the handling instructions. serviced have been negatively affected, conduct an insu-
lation check on the external metal connectors and between
Caution concerning electric shock! the blades of the power plug, and otherwise check that
safety is ensured.
(1) An AC voltage is impressed on this set, so touching in-
ternal metal parts when the set is energized could
(Insulation check procedure)
cause electric shock. Take care to avoid electric shock,
Unplug the power cord from the power outlet, disconnect
by for example using an isolating transformer and
the antenna, plugs, etc., and turn the power switch on. Us-
gloves when servicing while the set is energized, un-
ing a 500V insulation resistance tester, check that the in-
plugging the power cord when replacing parts, etc.
sulation resistance between the terminals of the power
(2)There are high voltage parts inside. Handle with extra plug and the externally exposed metal parts (antenna ter-
care when the set is energized. minal, headphones terminal, microphone terminal, input
terminal, etc.) is 1M or greater. If it is less, the set must
Caution concerning disassembly and be inspected and repaired.
assembly!
Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
CAUTION Concerning important safety
edges of parts which could cause injury if fingers are
moved across them. Use gloves to protect your hands.
parts

Only use designated parts! Many of the electric and structural parts used in the set
have special safety properties. In most cases these prop-
The set's parts have specific safety properties (fire resis- erties are difficult to distinguish by sight, and using re-
tance, voltage resistance, etc.). For replacement parts, be placement parts with higher ratings (rated power and
sure to use parts which have the same properties. In par- withstand voltage) does not necessarily guarantee that
ticular, for the important safety parts that are marked z on safety performance will be preserved. Parts with safety
wiring diagrams and parts lists, be sure to use the desig- properties are indicated as shown below on the wiring dia-
nated parts. grams and parts lists is this service manual. Be sure to re-
place them with parts with the designated part number.
Be sure to mount parts and arrange
the wires as they were originally! (1) Schematic diagrams ... Indicated by the z mark.
For safety reasons, some parts use tape, tubes or other in- (2) Parts lists ... Indicated by the z mark.
sulating materials, and some parts are mounted away from
Using parts other than the designated
the surface of printed circuit boards. Care is also taken with
parts could result in electric shock, fires or
the positions of the wires inside and clamps are used to
other dangerous situations.
keep wires away from heating and high voltage parts, so
be sure to set everything back as it was originally.

2
DN-F300
DIMENSION

3
DN-F300
WIRE ARRANGEMENT
If wire bundles are untied or moved to perform adjustment or parts replacement etc., be sure to rearrange them neatly as they
were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise generation.

Press the coil down to the cable,pls
be noted to avoid the screw hole
(as round marking)

Fix the 5P line of Jack board firmly
with locking cable clip and keep the
distance with black gict cable as far
as possible,but please take attention
that it cant be closed to above

Fix the 9P line in the SD card board
with the 5P line in the USB board
with cable ties,keep the insulation
line under the flat cable

4
DN-F300
VERSION UPGRADE PROCEDURE OF FIRMWARE
Use the procedure described below to update the firmware to a newer version.

(1) Press the POWER switch to turn on the power.
(2) Insert a SD card or a USB device that has the update file
'dnf30XXX.bin' on the root. Put both files on the SD card or
the USB device if we provide 2 .bin files.
(3) Press the SD or USB[source] button for the input source to
be updated.
At this time, "V-XX.XXOK?" is displayed in the display sec-
tion. If this is not displayed, perform steps (5 )- (8 )and
check the version.

(4) If the FOLDER/TRACK jog is pressed, "Update" flashes in
the display section, and update begins. When update has
completed, the system automatically restarts.
(5) To check the current main unit version, press the MENU/
STORE button for 2 seconds. At this time, the menu list is
displayed in the display section.

(6) Turn the FOLDER/TRACK jog to select "F/W Version".
(7) If the FOLDER/TRACK jog is pressed, the current version is 8. 6. 7.
displayed in the display section.
(8) Press the STOP button to exit the menu mode.

Note:
Please DO NOT touch and DO NOT disconnect power while the unit is being updated.
Before you update the unit, make sure that the power cable is firmly plugged into the DN-F300 and into an AC outlet.
If the power is turned off accidentally while the unit is being updated, the DN-F300 may not start up.
Please set the preset menu again after the upgrade.

5
DN-F300
TROUBLE SHOOTING

FLOW CHART NO.1 (MAIN/POWER UNIT)
The power cannot be turned on.

Is the AC adaptor normal Replace the AC adaptor.

Is normal state restored when once unplugged
power cord is plugged again after several seconds?

Is the +3.3line voltage normal?

Check if there is any leak or short-circuiting on
Is the +5V line voltage normal? the primary or secondly circuit component of
SWITCHING POWER SUPPLY UNIT, and
replace it if defective.
Is the USB5 line voltage normal?

Is the A5V line voltage normal?

Is the -A5V line voltage normal?

Check the the periphery circuit of MAIN and PANEL, and
replace it if defective.

FLOW CHART NO.2 (CONTROL UNIT)
LCD does not display.

Is 5V voltage supplied to 33pins(VCC) of IC203? Check the +5V line and service it if defective.

Replace IC203.

6
DN-F300
FLOW CHART NO.3 (CONTROL UNIT)
The key operation is not functioning.

Are the contact point and the installation state of the tact Re-install the switches correctly or replace the
switches normal? poor switch.

Does LED light correctly ? Check the IC201 and their periphery, and
service it if detective.

When pressing each switches, do the voltage of each pin Check the switches and their periphery, and
of IC201(shown below) increase? service it if detective.

Replace IC201.

FLOW CHART NO.4 (MAIN/POWER UNIT)
Both functions of picture and sound do not operate

The WAV file in which test signal of 1kHz/0dB is written is
prepared. With the test signal of 1kHz/0dB it repeats Check the input signal from IC101, IC103, and
between B from A and puts in playback state. their periphery, and service it if detective.
Are the audio signals outputted to 26pin(LINE Lch) and When the input signal is correct, IC101 or IC103
24pin(HP Rch) of IC101, 16pin(LINE Lch) and 13pin(LINE is replaced.
Rch) of IC103?

Check periphery circuit IC102, IC104, and
Are the audio signals outputted to 7pin(HP Lch) and 1pin(HP service it if defective.
Rch) of IC102, 7pin(LINE Lch) and 1pin(LINE Rch) of When the periphery circuit is correct, IC102 or
IC102? IC104 is replaced.

Check Q002 and the periphery circuit, and
Is MUTE released, and has been the Q002 base L(0V)?
service it if defective.

Check periphery circuit from 7pin and 1pin to JK104, JK102
of IC102, IC104 and replace it if defective.

7
DN-F300
SEMICONDUCTORS
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
The semiconductor which described a detailed drawing in a schematic diagram are omitted to list.

1. IC's
UDA1345TS/N2 (IC101)

halfpage ewidth VDDA(ADC) VSSA(ADC) VADCP VADCN Vref(A)
VSSA(ADC) 1 28 Vref(D)

VDDA(ADC) 2 27 VSSO 2 1 7 6 4

VINL 3 26 VOUTL

Vref(A) 4 25 VDDO 3 0 dB/6 dB 0 dB/6 dB 5
VINL VINR
SWITCH SWITCH
VINR 5 24 VOUTR

VADCN 6 23 VDDA(DAC)

VADCP 7 22 VSSA(DAC)
ADC ADC
UDA1345TS 8
MC1 8 21 MC2 MC1
10 DECIMATION FILTER 21
MP1 9 20 MP5 VDDD MC2

11 20
VDDD 10 19 DATAI MP5
VSSD DC-CANCELLATION FILTER
VSSD 11 18 DATAO
18 13
SYSCLK 12 17 WS DATAO MP2
16
MP2 13 16 BCK BCK L3-BUS 14
17 DIGITAL INTERFACE MP3
WS INTERFACE
MP3 14 15 MP4 19 15
DATAI MP4
MGS876 12
SYSCLK
9 INTERPOLATION FILTER
MP1

UDA1345TS
NOISE SHAPER

DAC DAC

26 24
VOUTL VOUTR

25 27 23 22 28
MGS875

VDDO VSSO VDDA(DAC) VSSA(DAC) Vref(D)

SYMBOL PIN TYPE DESCRIPTION
VSSA(ADC) 1 analog ground pad ADC analog ground
VDDA(ADC) 2 analog supply pad ADC analog supply voltage
VINL 3 analog input pad ADC input left
Vref(A) 4 analog pad ADC reference voltage
VINR 5 analog input pad ADC input right
VADCN 6 analog pad ADC negative reference voltage
VADCP 7 analog pad ADC positive reference voltage
MC1 8 5 V tolerant digital input pad with internal pull-down pad mode control 1 (pull-down)
MP1 9 5 V tolerant slew rate controlled digital output pad multi purpose pin 1
VDDD 10 digital supply pad digital supply voltage
VSSD 11 digital ground pad digital ground
SYSCLK 12 5 V tolerant digital Schmitt triggered input pad system clock 256, 384 or 512fs
MP2 13 3-level input pad multi purpose pin 2
MP3 14 5 V tolerant digital Schmitt triggered input pad multi purpose pin 3
MP4 15 3-level input pad multi purpose pin 4
BCK 16 5 V tolerant digital Schmitt triggered input pad bit clock input
WS 17 5 V tolerant digital Schmitt triggered input pad word select input
DATAO 18 5 V tolerant slew rate controlled digital output pad data output
DATAI 19 5 V tolerant digital Schmitt triggered input pad data input
MP5 20 5 V tolerant digital Schmitt triggered input pad multi purpose pin 5 (pull down)
MC2 21 5 V tolerant digital input pad with internal pull-down pad mode control 2 (pull-down)
VSSA(DAC) 22 analog ground pad DAC analog ground
VDDA(DAC) 23 analog supply pad DAC analog supply voltage
VOUTR 24 analog output pad DAC output right
VDDO 25 analog supply pad operational amplifier supply voltage
VOUTL 26 analog output pad DAC output left
VSSO 27 analog ground pad operational amplifier ground
Vref(D) 28 analog pad DAC reference voltage

8
DN-F300
PCM1716E (IC103)
PIN ASSIGNMENTS
PIN NAME I/O DESCRIPTION
LRCIN 1 28 ML/IIS
1 LRCIN IN Left and Right Clock Input. This clock is equal to
DIN 2 27 MC/DM1 the sampling rate - fS.(1)
BCKIN 3 26 MD/DM0 2 DIN IN Serial Audio Data Input(1)
CLKO 4 25 MUTE 3 BCKIN IN Bit Clock Input for Serial Audio Data.(1)
4 CLKO OUT Buffered Output of Oscillator. Equivalent to
XTI 5 24 MODE
System Clock.
XTO 6 23 CS/IWO
5 XTI IN Oscillator Input (External Clock Input)
DGND 7 22 RST 6 XTO OUT Oscillator Output
PCM1716E
VDD 8 21 ZERO 7 DGND -- Digital Ground
VCC2R 9 20 VCC2L 8 VDD -- Digital Power +5V

AGND2R 10 19 AGND2L
9 VCC2R -- Analog Power +5V
10 AGND2R -- Analog Ground
EXTR 11 18 EXTL
11 EXTR OUT Rch, Common Pin of Analog Output Amp
NC 12 17 NC
12 NC -- No Connection
VOUTR 13 16 VOUTL
13 VOUTR OUT Rch, Analog Voltage Output of Audio Signal
AGND1 14 15 VCC1 14 AGND1 -- Analog Ground
15 VCC1 -- Analog Power +5V
16 VOUTL OUT Lch, Analog Voltage Output of Audio Signal
17 NC -- No Connection
18 EXTL OUT Lch, Common Pin of Analog Output Amp
19 AGND2L -- Analog Ground
20 VCC2L -- Analog Power +5V
21 ZERO OUT Zero Data Flag
22 RST IN Reset. When this pin is low, the DF and
modulators are held in reset.(2)
23 CS/IWO IN Chip Select/Input Format Selection. When this
pin is low, the Mode Control is effective.(3)
24 MODE IN Mode Control Select. (H: Software, L: Hardware)(2)
25 MUTE IN Mute Control
26 MD/DM0 IN Mode Control, DATA/De-emphasis Selection 1(2)
27 MC/DM1 IN Mode Control, BCK/De-emphasis Selection 2(2)
28 ML/I2S IN Mode Control, WDCK/Input Format Selection(2)
NOTES: (1) Pins 1, 2, 3; Schmitt Trigger input. (2) Pins 22, 24, 25, 26, 27,
28; Schmitt Trigger input with pull-up resister. (3) Pin 23; Schmitt Trigger
input with pull-down resister.

9
DN-F300
MC9508AW60 (IC201)
Block Diagram

HCS08 CORE DEBUG 8

PORT A
MODULE (DBG) PTA7