-1-1-
[CONTENTS]
SECTION 1. GENERAL
•SERVICINGPRECAUTIONS...............................................1-2
•ESDPRECAUTIONS.....................................................1-4
•SPECIFICATION..........................................................1-5
SECTION 2. ELECTRICAL SECTION
•ELECTRICALTROUBLESHOOTINGGUIDE...................................2-1
•INTERNALBLOCKDIAGRAMofICs..........................................2-9
•BLOCKDIAGRAM......................................................2-15
•SCHEMATICDIAGRAMS.................................................2-19
•PRINTEDCIRCUITDIAGRAMS............................................2-31
SECTION 3. DVD PART ELECTRICAL
•DVDELECTRICALTROUBLESHOOTIHGGUIDE.................................3-1
•DVDSCHEMATICDIAGRAMS...............................................3-15
•DVDPRINTEDCIRCUITDIAGRAMS.........................................3-23
SECTION 4. EXPLODED VIEWS
•CABINETANDMAINFRAMESECTION........................................4-1
•TAPEDECKMECHANISM(A/R&A/S:RIGHTA/RDECK)..........................4-3
•TAPEDECKMECHANISM(A/R&A/S:LEFTA/SDECK)...........................4-5
•CDMECHANISM.........................................................4-7
SECTION 5. SPEAKER PART
•SPEAKERPART..........................................................5-1
SECTION 6. REPLACEMENT PARTS LIST
•REPLACEMENTPARTSLIST................................................6-1

-1-2-
SECTION 1. GENERAL
SERVICING PRECAUTIONS
NOTES REGARDING HANDLING OF THE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and
impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or
damage to the printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason
the adjustment point and installation screws should absolutely never be touched.
4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning the lens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used
for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton
swab should be used, taking care not to distort this.
6) Never attempt to disassemble the pick-up.
Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do
not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of
this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.
Storage in conductive bag
Drop impact
NEVER look directly at the laser beam, and don't let
contact fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure

-1-3-
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components
can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must be
taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnet-
ism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1M Ω)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent sta-
tic electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
CLEARING MALFUNCTION
You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).
Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of
the volume knob for more than 3 seconds.
If you reset your unit, you must reenter all its settings(stations, clock, timer)
NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.
2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.
Resistor
(1 Mohm) Conductive
Sheet
Resistor
(1 Mohm)
Armband
RESET jump wire
VOLUME
VOLUME KNOB
DOWN
UP

-1-4-
ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated
circuits and some field-effect transistors and semiconductor chip components. The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur-
face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen-
erate static electricity sufficient to damage an ESD device).
CAUTION. GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED "DAN-
GEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.

-1-5-
SPECIFICATIONS (LM-D7550A, KR-D9900DV)
(LM-K9550A, KR-9950KDV)

-1-6-

-2-1-
SECTION 2. ELECTRICAL SECTION
ELECTRICAL TROUBLESHOOTING GUIDE
P-SENS Part
VKK check
SMPS Assy CN902 7PIN 5.1V check
SMPS Troubleshooting consult
CN710 connection state check
MAIN PCB PATTERN cutting and short check
IC306 Inputvoltage4V over ,Outputvoltage.
2.1V over statecheck
SMPS Troubleshooting consult
IC306 KIA7042 change
MAIN PCB CN710 7PIN 5.1V check
MAIN PCB CN304 5PIN 5.1Vcheck
FRONT PN302 36PIN 5.1Vcheck
FRONT IC306(RESET IC) state check
u-COM IC304 100 PIN 5Vcheck
CN710 10 Pin DC -33V check
IC304 87 PIN voltage check
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES

-2-2-
MICOM (IC301) check
P-SENS Troubleshooting consult
Q302 state check
TR "Q302" change
MAIN CN710 6 PIN check
SMPS Troubleshooting consult
PN302 35 PIN +5.6V(MI)check
X301 change
"P-SENS"check
"RESET" IC304 92 PIN check(HIGH LOW HIGH)
IC304 VDD(31,32,51,88)PIN voltage check
X301 vibration signal check
IC301 change
P-CTRL check
MICOM IC304 state check
SMPS +MAIN BORD-TO-BORD check
PN302 33 PIN "P-CTRL" check (HIGH)
CN710 5 PIN check
SMPS Troubleshooting consult
Muting Troubleshooting (MUTE state)
EXPEND IC(IC305)5PIN HIGH state check
Q752(A102)state check
EXPEND IC(IC305)
state check
EXPEND IC(IC305)
faulty is change
Q752(A102)state check
Each part TR change
Q752(A102)Base "HIGH"
Q701,Q751(D1302)BASE "HIGH"check
MUTE
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES

-2-3-
EXPEND IC(IC305/501/502)state
D321/D553/D551(1SS133)check
D321/D553/D551(1SS133)change
PCB Pattern check
PCB Pattern check
MICOM (IC304)25,26,27 PIN
check(CLK1/2/3)
MICOM (IC304)28 PIN check
EXPEND IC faulty is change
16 PIN VDD voltage check
3 "EXP-CLK"check
2 "EXP-DATA"check
4 PIN ~15 PIN Each PORT state check
EXPEND IC OK
FUNCTION SOUND (NJW1190) IC601
DECK HEAD WIRE Connection state check
IC502 4PIN(REC SW)"LOW"state REC'
Q212 (C) "HIGH" check
Q213 (C)"LOW"check
IC502 13 PIN "REC- BAIS"HIGH check
L203(4.7mH)COIL vibration signal check
IC601 7 /32 Input REC' SIGNAL check
IC502 10PIN(PB MUTE) state
state check
IC502 4PIN(REC SW)"HIGH"check
IC601(NJW1190)Troubleshooting consult
TAPE FUNCTION
IC201 Input check(HEAD Input)"A"DECK 32,39 "B"DECK 34,37
IC201 output check(5,26 PIN)
IC601 3,36PIN INPUT Signal check
IC601 17,22 PIN OUTPUT Signal check
DECK output
1)
1)
IC502 2 PIN/3 PIN check(DATA/CLK)
IC502 16 PIN VDD check
IC502 EXPEND IC change
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO

-2-4-
AUX
JK601 SignalInput check
IC601 5,34 PIN SignalInputcheck
IC601 17,22 PIN OUTPUT Signal check
AUX Output
MAIN PCB PATTERN check
IC601(NJW1190)Troubleshooting
consult
CD
CN709 1,3pin Signalcheck, CD Troubleshootingconsult
IC601 4,35PIN SignalInputcheck
IC601 17,22 PIN OUTPUT Signal check
CD Output
MAIN PCB PATTERN check
IC601(NJW1190)Troubleshooting
consult
TUNER
TU101 3 /5 SIGNAL check
IC601 2,37 PIN SignalInputcheck
IC601 17,22 PIN OUTPUT Signal check
TUNER Output
TU101 2 PIN "+ 9V" voltage check
TUNER MODULE change
TU101 6,7,8,9 PIN check( PLL-
CE, PLL- DI, CLK, PLL- DO)
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO

-2-5-
MIC
IC601(NJW1190)Troubleshooting
CN303 7 PIN "MIC-SIGNAL"check
IC601 44 PIN SIGNAL check(OW601 Pattern)
IC601 17,22 PIN OUTPUT Signal check
MIC Output
IC601 21Pin voltage input check
IC601 17.22 Pin wave Output check
IC601 OK
IC601 19,20 SDA,SCA Pulse wave check(VOL UP,
DOWN turn check)
FUNCTION INPUT PORT SIGNAL check
(NJW1190 Troubleshooting)
CN303 4 MIC-SENSE check
PN400 3 PIN "+12V"check
MIC MUTE check(Q409/Q408)
TR change
IC402 8 PIN SIGNAL INPUT check
PN400 9 "VOL-IN"check
IC402 2 PIN SIGNAL INPUT check
PN400 10 PIN "VOL-OUT"check
SMPS voltage check consult
IC301 5,6 Pin check
IC301 Troubleshooting
IC601 change
<MIC PCB>
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO

-2-6-
AMP MODULE Troubleshooting
IC501 9 PIN(AMP-PWR)HIGH check
IC701 11 PIN "AMP-ON/OFF"HIGH check
IC701 12 PIN "PROTECTION" LOW check
IC701 3 ,20 &5 ,18 each +65V &-65V check
IC701 9 ,14 ±9V check
IC701 10 ,13 INPUT SIGNAL check
IC701 6 ,17 OUTPUT SIGNAL check
OK
IC305 9 PIN(AMP-PWR)HIGH check
PN702 3 PIN "PROTECTION" check(HIGH LOW)
SMPS voltage check consult
PROTECTION "HIGH" SMPS voltage
and = AMP ON/OFF STATE CHECK
AMP module CHECK :MOS FET both
are read SHORT AMP DEAD
AMP module change
SMPS Troubleshooting consult
SMPS Troubleshooting consult
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO

-2-7-
Rec check (Q205 ON :R283 High)
IC502 13 PIN OUTcheck
IC201 7,24 Pin Input check
REC Inputcheck check
Input LINE check
REC Outputcheck after
faulty is ICchange
IC202 4PIN statecheck
Q205 Base 0.6V check
Voltage check consult
IC202 Troubleshooting check
Q204 change
L203 change
Q204 Collector Low
Q204 change
OK
IC201 10.21PIN Output check
L203 2,3PIN check
IC502 4 PIN statestate check
Q213.212 state statecheck
DECK change
IC601 each Input TUNER2,37.TAPE3,36.CD.4,35.AUX.
5,34 Pin Signal Input check
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO

-2-8-
Dubbing check ("NORMAL or REC"//"HIGH")
IC601 7,32 OUTcheck
IC601 each Input TUNER2,37.TAPE3,36.CD.4,35.AUX.
5,34 Pin Signal Input check
IC601 7, 32 Pin Input check
IC201 10.21PIN Output check
L203 2,3PIN check
IC502 4 PIN statestate check
Q213.212 state statecheck
DECK change
REC Inputcheck check
IC202 4PIN statecheck
Q205 Base 0.6V check
voltage check consult
IC202 Troubleshooting check
Q204 change
L203 change
Q204 Collector Low
Q204 change
OK
REC Outputcheck after faulty is
IC change
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO

-2-9-
INTERNAL BLOCK DIAGRAM of ICs
• HA12237F
BLOCK DIAGRAM

-2-10-
• NJW1190
BLOCK DIAGRAM
• AF330W20FS
BLOCK DIAGRAM

-2-11-
PIN CONFIGURATION
PIN DESCRIPTION
Pin Number Symbol
Type
Description
1
L_DO
O
L-Channel Drain Output
2
SUBGND
G
Sub Ground
3
VDD_L
P
L-Channel Positive supply Voltage
4
L_GND
P
L-Channel Signal Ground
5
VSS_L
O
L-Channel Negative supply Voltage
6
L_OUT
G
L-Channel Audio Output
7
AM_F1
I
AM Mode control Input 1
8
L_CS
I
L-Channel Current Sense Input
9
VCC
P
Positive supply Voltage
10
L_IN
I
L-Channel Audio Input
11
STANDBY
I
ON/OFF control
12
P_STATE
O
Protection State
13
R_IN
I
R-Channel Audio Input
14
VEE
P
Negative supply Voltage
15
R_CS
I
R-Channel Current Sense Input
16
AM_F2
I
AM Mode control Input 2
17
R_OUT
G
R-Channel Audio Output
18
VSS_R
O
R-Channel Negative supply Voltage
19
R_GND
P
R-Channel Signal Ground
20
VDD_R
P
R-Channel Positive supply Voltage
21
SUBGND
G
Sub Ground
22
R_DO
O
R-Channel Drain Output

-2-12-
• AF350W01FS
BLOCK DIAGRAM
PIN CONFIGURATION

-2-13-
PIN DESCRIPTION
Pin Number Symbol
Type
Description
1
N_DO
O
NMOS Drain Output
2
VSS
P
Negative supply Voltage
3
N_CS
I
NMOS Current Sense Input
4
P_CS
I
PMOS Current Sense Input
5
NC
6
NC
7
VEE
P
Negative supply Voltage
8
STANDBY
I
ON/OFF control
9
IN
I
Audio Input
10
P_STATE
O
Protection State
11
VCC
P
Positive supply Voltage
12
OUT
O
Audio Output
13
GND
G
Signal Ground
14
SUBGND
G
Sub Ground
15
VDD
P
Positive supply Voltage
16
P_DO
O
PMOS Drain Output

-2-14-

2-15
2-16
BLOCK DIAGRAM

2-17
2-18
BLOCK DIAGRAM

2-19
2-20
SCHEMATIC DIAGRAMS
• FRONT SCHEMATIC DIAGRAM

2-22
2-21
• MAIN SCHEMATIC DIAGRAM

2-23
2-24
• A/V JACK SCHEMATIC DIAGRAM

2-26
2-25
• WOOFER AMP SCHEMATIC DIAGRAM

2-27
2-28
• POWER SCHEMATIC DIAGRAM (LM-U5050/U4050/K9550/D7550)

2-30
2-29
• SUB POWER SCHEMATIC DIAGRAM

2-31
2-32
PRINTED CIRCUIT DIAGRAMS
• MAIN P.C. BOARD

2-34
2-33
• MAIN AMP P.C. BOARD

2-35
2-36
• MAIN AMP P.C. BOARD

2-37
2-38
• FRONT P.C. BOARD

2-39
2-40
• POWER P.C. BOARD

2-42
2-41
• SUB POWER P.C. BOARD

2-43
2-44
• WOOFER AMP P.C. BOARD
• AV JACK P.C. BOARD

-3-1-
SECTION 3. DVD PART ELECTRICAL
DVD ELECTRICAL TROUBLESHOOTIHG GUIDE
POWER CHECK GUIDE
Y
Y
N
Y
Y
Y
N
N
N
N
Y
Y
N
POWER ON
DOES CD/DVD
APPEAR AT FLD?
DOES LOADING
APPEAR AT FLD?
CHECK POWER.
CHECK DVD MODULE.
CHECK CONNECTOR
CN910.
CHECK
VOLTAGE EACH PIN
FOR CN709.
CHECK MAIN BOARD
REGULATOR.
RECONNECT
IT.
OK.
DOES
AUX, FM 87.5 APPEAR
AT FLD?
DOES IT
APPEAR DVD ERROR
AT FLD?
CHECK
CONNECTOR (PN307)
IF IS NORMALLY.
CHECK IF DVD AN AUDIO
MICOM INTERFACE IS OK.
DOES NO DISC
OR TIME APPEAR AT
FLD?

-3-2-
POWER ON
SHOW LOGO?
FLASH
MEMORY OPERATES
PROPERLY?
SDRAM WORKS
PROPERLY?
CHECK AV CABLE
CONNECTION TO TV SET.
NORMAL OUT_SW,
IN_SW SIGNALS?
CHECK THE LOAD OPEN &
CLOSE SWITCH.
CHECK THE RELATED CIRCUIT OF
ES6698FD (IC501)PIN 109,110,111,
112,113,114,115.
CHECK CONNECTION LINES
BETWEEN SDRAM (IC503)&ES6698FD
AND THE SDRAM IS DAMAGED.
CHECK THE TRAY CONTROL
I/O PIN ON ES6698FD.
CHECK THE TRAY CONTROL
AMPLIFYING CIRCUIT IC402.
NORMAL CLOSE,
OPEN SIGNAL?
NORMAL LOAD+&
LOAD-SIGNAL?
CHECK THE CABLE CON-
NECTION BETWEEN DVD
PCB AND LOADER (MECHA)
DOES TRAY
MOVE INSIDE WHEN IT
IS NOT AT CLOSED
POSITION?
ES6698FD
VIDEO OUTPUTS
PROPERLY?
CHECK CONNECTION LINES BETWEEN FLASH
&ES6698FD AND THE FLASH ACCESS TIME
WHETHER IS SUITABLE OR NOT.
TEST &DEBUG FLOW

-3-3-
DOES THE
SLED MOVE TO INNER SIDE
WHEN IT IS AT OUTER
POSITION?
MOTOR DRIVER STBY
PIN IS HIGH?
NORMAL SLEGN
SIGNAL?
SL+AND SL-OUTPUT
PROPERLY?
CHECK THE CABLE
CONNECTION WITH
MECHA.
PROPER FOCUS
OUTPUTS TO MOTOR
DRIVER?
PROPER F+&F-
OUTPUTS?
CHECK THE AMP CIRCUIT ON MOTOR
DRIVER (IC404).
CHECK FOCUS CONNECTION ON
ES6698FD AND MOTOR DRIVER.
CHECK THE AMP CIRCUIT ON MOTOR
DRIVER (IC404).
CHECK THE RELATED CIRCUIT OF
SLEGN (IC404).
CHECK THE CONNECTION LINE OF
STBY SIGNAL (IC404).
CHECK CABLE CONNECTION
WITH PICK-UP HEAD.
DO NOT PUT IN DISC AND
TRAY CLOSE.
OPTICAL LENS
HAS MOVEMENTS FOR
SEARCHING FOCUS?
B
C

-3-4-
C
LASER
TURNS ON WHEN READING
DISC?
DVDLD OR CDLD
OUTPUT PROPERLY?
CHECK CABLE CONNECTION
BETWEEN TRANSISTOR
OUTPUT AND PICK-UP HEAD.
PUT DISC IN?
LASER OFF.
PROPER RFO SIGNAL
ON ES6603S?
CHECK THE RFO
CONNECTION BETWEEN
ES6603S AND ES6698FD.
PROPER SPINDLE
SIGNAL ON ES6698FD.
DCMO+,DCMO-
OUTPUT PROPERLY?
CHECK THE CABLE
CONNECTION BETWEEN
SPINDLE AND DVD PCB.
CHECK THE SPINDLE CONTROL AMP
CIRCUIT OF MOTOR DRIVER (IC404).
CHECK THE SPINDLE RELATED
CIRCUIT ON ES6698FD.
CHECK THE RELATED CIRCUIT
ON ES6603 RFO SIGNAL.
CHECK THE RELATED CIRCUIT OF LASER
POWER TRANSISTOR.
CHECK THE LASER POWER CIRCUIT ON
ES6698FD AND CONNECTING TO POWER
TRANSISTOR.(Q404,Q405)
COLLECTOR
VOLTAGE OF POWER
TRANSISTOR IS OK?
(Q404,Q405)
DISC ID IS CORRECT?
DOES SPINDLE
ROTATE?
D

-3-5-
D
E
FOCUS ON OK?
PROPER SIGNAL ON
A,B,C,D OF ES6603S.
CHECK THE CONNECTIONS BETWEEN
ES6603S AND PICK-UP HEAD.
CHECK THE RELATED CIRCUIT OF
ES6698FD FOCUS SIGNAL.
CHECK THE RELATED CIRCUIT ON
ES6603S.
CHECK THE TRACK CONNECTION ON
ES6698FD AND MOTOR DRIVER (IC404).
CHECK THE TRACKING CONTROL AMP
CIRCUIT ON MOTOR DRIVER (IC404).
PROPER FEI SIGNAL ON
ES6603S?
CHECK FEI CONNECTION
BETWEEN ES6603S AND
ES6698FD.
PROPER TEI SIGNAL ON
ES6603S?
PROPERLY TRACK
SIGNAL ON ES6698FD.
T+&T-OUTPUT
PROPERLY?
CHECK CABLE CONNECTION
ON PICK-UP HEAD.
CHECK RF SIGNAL
WAVEFORM.
TRACK ON OK?
DISC IS PLAY?

-3-6-
E
NORMAL OUTPUT
WHEN DISC PLAYBACK?
NORMAL IR,VFD &
FRONT PANEL KEY
FUNCTIONS?
TEST END
AUDIO DAC
RECEIVED CORRECT DATA
STREAM?
NORMAL AUDIO DAC
OUT (IC700)?
CHECK AUDIO FILTER,AMPLI-
FY, MUTE CIRCUIT (IC700
APPLICATION CIRCUIT)?
CHECK THE CABLE
CONNECTION FRONT PANEL.
CHECK COMMUNICATION LINES ON
ES6698FD.
COMMUNICATIONS BETWEEN
IR.VFD FRONT PANEL KEY &
ES6698FD &AUDIO FRONT
MICOM IS NORMALLY?
CHECK THE RELATED CIRCUIT OF AUDIO
DAC. CHECK AUDIO OUT PIN 3,14,15,18,19)
CHECK THE CONNECTIONS BETWEEN
IC508 &IC700 SIGNAL (DAC_RESET,
DAC_CLK,DAC_DATA,DAC_CS).

-3-7-
USB PART
TURN ON USB
"SEARCHING "OR
"USB "DISPLAY CHECK
READING OK CHECK
IF PLAY,AUDIO
OUTPUT CHECK
OK
CHECK THE POWER SUPPLY CIRCUIT.
(CHECK PN910 PIN 11 (3.3V)
CHECK THE RELATED CIRCUIT OF AUDIO
MICOM INTERFACE.(CHECK AUDIO
MICOM PIN 6 RESET)
CHECK THE USB PART AND DVD PART
INTERFACE.(CHECK LA1,LA2,LA3,
WRLL#,LOE#,LCS2#)
CHECK THE USB JACK POWER SUPPLY.
(CHECK CN911 1 PIN 5V)
CHECK THE USB DATA LINE.(CHECK
CN911 2 PIN D-,3PIN D+)
CHECK THE IC705 (UBI9021).(CHECK
DATA LINE PIN 14~17,20~23)
CHECK THE CONNECTIONS BETWEEN
IC508 &IC700 SIGNAL (DAC_RESET,
DAC_CLK,DAC_DATA,DAC_CS).
CHECK THE AUDIO OUTPUT CONNECTOR.
(CHECK CN910 PIN 1,3)

-3-8-
WHEN POWER ON,RESET &DATA ETC WAVEFORM
PN307
1.RESET
2.D-CS
3.A_DATA
4.D_DATA
PN307
1.USB_ctrl
2.H-CLK

-3-9-
OPEN/CLOSE WAVEFORM AT POWER ON
STARTING ACTION WAVEFORM IN MD DEVICE
PDM05
1.open
2.UP-sw
3.DOWN-sw
4.close
IC404
1.Driver STBY
2.SLEGN
3.SL+
4.SL-
(Power on )

-3-10-
FOCUS WAVEFORM
DETECTING CD/DVD WAVEFORM
IC404
1.F+
2.F-
(NO DISK )
1.Q404(DVD_LD)
2.Q405(CD_LD)
(INSERT CD )

-3-11-
IC404
1.Spindle
2.DCMO+
3.DCMO-
PDM01
1.A
2.B
3.C
4.D
AT POWER ON ,SPINDLE SIGNAL AT MD DECK
AT FIRST ACTION,FOCUS SIGNAL A,B,C,D

-3-12-
TRACKING SIGNAL
RF WAVEFORM
IC404
1.Track
2.T-
3.T+

-3-13-
DISK TYPE JUGEMENT WAVEFORM
1.F+
2.FE
3.RFI
(DVD)
(CD)

-3-14-

3-15
3-16
DVD SCHEMATIC DIAGRAMS
• MPEG SCHEMATIC DIAGRAM

• RF&SERVO SCHEMATIC DIAGRAM
3-17
3-18

• USB CONTROLLER SCHEMATIC DIAGRAM
3-19
3-20

• INTERFACE SCHEMATIC DIAGRAM
3-21
3-22

DVD PRINTED CIRCUIT DIAGRAMS
• CDP P.C. BOARD
3-23
3-24

3-26
3-25
• CDP P.C. BOARD

4-1
4-2
SECTION 3. EXPLODED VIEWS
A26
A41
290
275
A54
279
450
450
280
305
278
281
285
A52
276
A53
277
451
284
302
283
283
453
301
A56
A51
267
287
296
282
451
A47
454
A00
450
289
A46
270
257
256
255
251
250
A48
450
303
452
254
252
272
273
271
248
450
265
266
264
450
261
274
269
260
268
288
258
259
263
262
253
A49
286
*OPTION
A43
Caution point
A50: Headphone + MIC + USB + Main
array assembly pcb.
• CABINET AND MAIN FRAME SECTION

4-4
4-3
• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK)
025
504
023
015
022
019
037
021
020
505
018
017
016
506
006
A01
402
008
007
401
001
002
003
502
507
501 502
402
401009
401 009
011
013
A02
026
403
406
LOCA. NO. LG PART NO.
DESCRIPTION
SPECIFICATION
A00
6720AG0008A
DECK,AUDIO
CWN42FR04 TOKYO PIGEON L-DOUBL
A01
6768R-UP04A
DECK MECHANISM PARTS
50-093-41285 PIGEON UNIT
A02
6768R-EP05A
DECK MECHANISM PARTS
50-093-41234 PIGEON HEAD ASSY
001
6768R-BP03D
DECK MECHANISM PARTS
02-083-4254 PIGEON BELT/FELT C
002
6768R-BP03E
DECK MECHANISM PARTS
02-083-4256 PIGEON BELT/FELT C
003
6768R-PP03A
DECK MECHANISM PARTS
33-160-4309 PIGEON PRESS CASSE
006
6768R-QP04A
DECK MECHANISM PARTS
50-093-41299 PIGEON MOTOR(ASSY
007
6768R-GP03B
DECK MECHANISM PARTS
50-222-4578 PIGEON GEAR IDLER
008
6768R-SP01F
DECK MECHANISM PARTS
01-082-4598 PIGEON SPRING CWL4
009
6768R-MP01C
DECK MECHANISM PARTS
50-219-4014 PIGEON MOLD CWL44
011
6768R-SP01A
DECK MECHANISM PARTS
01-081-4601 PIGEON SPRING CWL4
013
6768R-SP03A
DECK MECHANISM PARTS
01-082-4686 PIGEON SPRING CRM4
015
6768R-AP01A
DECK MECHANISM PARTS
50-268-3016 PIGEON ARM CWL44
016
6768R-GP01H
DECK MECHANISM PARTS
50-093-4503 PIGEON GEAR CRL442
017
6768R-AP01C
DECK MECHANISM PARTS
50-239-4072 PIGEON ARM CWL44
018
6768R-GP01J
DECK MECHANISM PARTS
50-222-4428 PIGEON GEAR CRL442
019
6768R-SP01P
DECK MECHANISM PARTS
01-081-4678 PIGEON SPRING CRL4
020
6768R-BP01C
DECK MECHANISM PARTS
02-083-4188 PIGEON BELT/FELT C
021
6768R-LP01C
DECK MECHANISM PARTS
50-223-4429 PIGEON PULLEY/FLYW
022
6768R-VP03A
DECK MECHANISM PARTS
50-093-4748 PIGEON SOLENOID AS
023
6768R-GP03A
DECK MECHANISM PARTS
50-093-4810 PIGEON GEAR ASSY C
025
6768R-JP03B
DECK MECHANISM PARTS
50-093-31009 PIGEON PULLEY/FLY
037
6768R-JP03A
DECK MECHANISM PARTS
50-093-4674 PIGEON PULLEY/FLYW
401
6768R-CP01B
DECK MECHANISM PARTS
GSE20A2005 PIGEON SCREW CWL44
402
6768R-CP01A
DECK MECHANISM PARTS
GSE10A2003 PIGEON SCREW CWL44
403
6768R-CP01D
DECK MECHANISM PARTS
GSL10A1704 PIGEON SCREW CWL44
407
6768R-CP01H
DECK MECHANISM PARTS
GSL20A2005 PIGEON SCREW CWL44
408
6768R-CP01J
DECK MECHANISM PARTS
03-300-4127 PIGEON SCREW CWL44
501
6768R-WP03A
DECK MECHANISM PARTS
GWN19S035040 PIGEON WASHER CRM
502
6768R-WP03B
DECK MECHANISM PARTS
03-000-4532 PIGEON WASHER CRM4
504
6768R-WP01D
DECK MECHANISM PARTS
GWP21X045020 PIGEON WASHER CWL
505
6768R-WP01E
DECK MECHANISM PARTS
GWP12X030040S PIGEON WASHER CW
506
6768R-WP01H
DECK MECHANISM PARTS
GWP23X040020 PIGEON WASHER CWL
507
6768R-WP01F
DECK MECHANISM PARTS
GWN21X040040 PIGEON WASHER CWL

4-5
4-6
• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK)
016
401
018
007
008
015
023
019
021
020
505
017
403
504
025
026
030
029
028
401 027
502
009
401
003
501
401
011
013
009
022
LOCA. NO. LG PART NO. DESCRIPTION
SPECIFICATION
A00
6720AG0008A DECK,AUDIO
CWM42FR47 TOKYO PIGEON L-DOUBL
003
6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE
007
6768R-GP03B DECK MECHANISM PARTS 50-222-4578 PIGEON GEAR IDLER
008
6768R-SP01F DECK MECHANISM PARTS 01-082-4598 PIGEON SPRING CWL4
009
6768R-MP01C DECK MECHANISM PARTS 50-219-4014 PIGEON MOLD CWL44
011
6768R-SP01A DECK MECHANISM PARTS 01-081-4601 PIGEON SPRING CWL4
013
6768R-SP03A DECK MECHANISM PARTS 01-082-4686 PIGEON SPRING CRM4
015
6768R-AP01A DECK MECHANISM PARTS 50-268-3016 PIGEON ARM CWL44
016
6768R-GP01H DECK MECHANISM PARTS 50-093-4503 PIGEON GEAR CRL442
017
6768R-AP01C DECK MECHANISM PARTS 50-239-4072 PIGEON ARM CWL44
018
6768R-GP01J DECK MECHANISM PARTS 50-222-4428 PIGEON GEAR CRL442
019
6768R-SP01P DECK MECHANISM PARTS 01-081-4678 PIGEON SPRING CRL4
020
6768R-BP01C DECK MECHANISM PARTS 02-083-4188 PIGEON BELT/FELT C
021
6768R-LP01C DECK MECHANISM PARTS 50-223-4429 PIGEON PULLEY/FLYW
022
6768R-VP03A DECK MECHANISM PARTS 50-093-4748 PIGEON SOLENOID AS
023
6768R-GP03A DECK MECHANISM PARTS 50-093-4810 PIGEON GEAR ASSY C
025
6768R-JP03B DECK MECHANISM PARTS 50-093-31009 PIGEON PULLEY/FLY
026
6768R-SP01D DECK MECHANISM PARTS 01-080-4609 PIGEON SPRING CWL4
027
6768R-DP01A DECK MECHANISM PARTS 50-259-3342 PIGEON LEVER CWL44
028
6768R-RP01A DECK MECHANISM PARTS 22-027-41054 PIGEON ROLLER CWL
029
6768R-MP01A DECK MECHANISM PARTS 50-219-4033 PIGEON MOLD CWL44
030
6768R-EP03C DECK MECHANISM PARTS T21V0P PIGEON HEAD CWM42FF30
401
6768R-CP01B DECK MECHANISM PARTS GSE20A2005 PIGEON SCREW CWL44
403
6768R-CP01D DECK MECHANISM PARTS GSL10A1704 PIGEON SCREW CWL44
501
6768R-WP03A DECK MECHANISM PARTS GWN19S035040 PIGEON WASHER CRM
502
6768R-WP03B DECK MECHANISM PARTS 03-000-4532 PIGEON WASHER CRM4
504
6768R-WP01D DECK MECHANISM PARTS GWP21X045020 PIGEON WASHER CWL
505
6768R-WP01E DECK MECHANISM PARTS GWP12X030040S PIGEON WASHER CW

4-8
4-7
LOCA.NO. PART NO
DESCRIPTION
SPECIFICATION
A26
4405RCS007C MECHANISM ASSEMBLY
DVM-H1523 (DP-9 SS P/UP) DVD 3
A30
3041RBD003F BASE ASSEMBLY
PU (DVM-H1523 DP-9 SS P/UP) HZ
012A
5040R-0110A RUBBER
DVD REAR DP8 RIGHT 20 OTHER BL
024
4470R-0179A GEAR
DVD DP-9 PINION MOLD
025
4470R-0178A GEAR
DVD DP-9 MIDDLE MOLD
030
4470R-0180A GEAR
DVD DP-9 RACK MOLD
035
6871R-9295C PWB(PCB) ASSEMBLY,TOTAL
DP9000-3 FEEDING
035A
6850R-GK22X CABLE,FLAT
P=1.0 FFC UL2896(0.05X0.65) 11
036
4370R-0136A SHAFT
"DVD PU, DR-02 SUS-420J2 OTHER"
037
6768R-JP03A DECK MECHANISM PARTS
50-093-4674 PIGEON PULLEY/FLYW
151
3390RB0002A TRAY
DISC(CDM-H1503)
153
4470RB0005A GEAR
TRAY (CDM-H1503)
155
4681RBA001C MOTOR ASSEMBLY
HOME TRAY (CDM-H1503) MABUCHI
156
6871RF9211A PWB(PCB) ASSEMBLY,FRONT
1503 T/D SENSOR
159
3390RB0001B TRAY
DECK/MECHA CDM-H1503 MOLD LOAD
162
4400R-0012A BELT
DECK/MECHA MAIN CDM-H1503V OTH
163
4470R-0190A GEAR
DECK/MECHA PULLEY CDM-H1503V M
164
4470RB0003A GEAR
LOADING (CDM-H1503)
165
6871RZ7036A PWB(PCB) ASSEMBLY,OTHERS
CDM-H1503 UP/DW/OP/CL
166
4470RB0006A GEAR
PU UP (CDM-H1503)
167
4470RB0007A GEAR
PU DOWN (CDM-H1503)
168
4470RB0002A GEAR
CAM (CDM-H1503)
169
4861RB0002B CLAMP ASSEMBLY
DVD DVM-H1513
170
3550R-0685A COVER
DECK/MECHA GUIDE MOTOR CDM-H15
172
3040RB0005A BASE
MAIN (CDM-H1503)
173
4510RB0001A LEVER
S/W CLOSE
175
4681RBA002A MOTOR ASSEMBLY
HOME LOADING (PULLEY 8.6)
177
4470RB0001A GEAR
MAIN (CDM-H1503)
180
3210R-M009A FRAME
UD MOLD DVM-H1523V
416
88H-0004
CD MECHA PARTS
3X12X12FNM
417
88H-0002
CD MECHA PARTS
3X9X12FZMY
418
353-025BAAA SCREW,DRAWING
#NAME?
419
88H-0003
CD MECHA PARTS
3X12X10FZMY
422
353-028H
SCREW
#NAME?
430
1SZZR-0064B SCREW,DRAWING
+ 1 D1.7 L7.0 SWCH18A/BZN DP8
431
1SZZR-0062A SCREW,DRAWING
+ 1 D1.7 L4.5 SWCH18A/NI DP8 P
432
1SZZR-0072A SCREW,DRAWING
+ 1 D1.7 L4.5 SWRCH18A/FZY DP8
435
1SZZR-0011A SCREW,DRAWING
MACHINE
439
1SZZR-0075A SCREW,DRAWING
+ 1 D1.7 L10.0 SWRCH18A/FZW DP
416
151
156
418
173
419
170
163
422
165
159
164
417
417
416
166
167
177
175
172
A03
036
180
162
153
168
155
012A
A30
431
435
439
025
030
024
430
432
012A
035A
021
035 438
169
• CD MECHANISM

-5-1-
SECTION 5. SPEAKER SECTION
MODEL: LMS-K9550S, KR-9950KDV,
KR-9900DV, LMS-D7550S
WIRE 62
651
650
661
660
659
658
655
663
654
653
A60
662
WIRE 63
665 (RIGHT)
(LEFT)
657
656
(RIGHT)
(LEFT)
WIRE 61

-5-2-
MODEL: LMS-K9550V, KR-D9950KDV,
KR-9900DV, LMS-D7550V
WIRE 80
865
851
864
869
866
850
852
868
853
855
854
A80
861
870
851
(LEFT)
(RIGHT)
863
862
857
860
(LEFT)
867
859
858
WIRE 81

-5-3-
MODEL: LMS-K9550W, KR-9950KDV,
KR-9900DV, LMS-D7550W
750
WIRE 71
WIRE 72
752
772
783
751
762
A70
A75
760
770
754
756
755
758
757
759
761
753
771

-5-4-