Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo DHC DHC-XD300 & XD350 DHC-XD300 & XD350

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9CD8301700

Digital Home Cinema System

DHC-XD300 Series
DHC-XD350 Series

MEN
U/
RE
TU
RN

TIM
AN E
GLE

DIGITAL HOME CINEMA SYSTEM

PLAY

DHC-XD300 Series

MEN
U/
RE
TU
RN

TIM
AN E
GLE

DIGITAL HOME CINEMA SYSTEM DHC-XD350

OPEN/CLOSE PLAY/PAUSE STOP PREV NEXT FUNCTION
DOWN VOL. UP

ON/OFF
POWER PHONES
SKIP

DHC-XD350 Series
DIGITAL HOME CINEMA SYSTEM
DHC-XD 300/350
DHC-XD 300/350P (with Pro Logic II)
DHC-XD 300/350S (with Progressive Scan)
DHC-XD 300/350PS (with Pro Logic II, Progressive Scan)

Contents
1. SAFETY PRECAUTIONS......................................................3/4 9. BLOCK DIAGRAM............................................................32/35

2. SPECIFICATIONS....................................................................5 10. WIRING DIAGRAM...............................................................36

3. LOCATION OF USERS CONTROLS....................................6/8 11. SCHEMATIC DIAGRAM..................................................37/45
FRONT PANEL. AMP SCHEMATIC DIAGRAM.
REAR PANEL. FRONT SCHEMATIC DIAGRAM.
DISPLAY. DDX SCHEMATIC DIAGRAM.
REMOTE CONTROLLER. I/O SCHEMATIC DIAGRAM.
DSP SCHEMATIC DIAGRAM.
MPEG DECODER SCHEMATIC DIAGRAM.
4. CONNECTING TO EQUIPMENT.........................................9/11 MPEG OUTPUT SCHEMATIC DIAGRAM.
CONNECTING TO TV
CONNECTING TO AUDIO & VIDEO. REGULATOR SCHEMATIC DIAGRAM.
CONNECTING TO SPEAKER.
CONNECTING TO RECORDING EQUIPMENT. 12. PRINTED CIRCUIT DIAGRAM........................................46/54
FRONT PCB.
I/O PCB.
5. TROUBLE SHOOTING GUIDE.........................................12/19 MPEG PCB.
MAIN PCB.
6. DVD PROGRAM DOWNLOAD METHOD..............................20 REGULATOR PCB.
STANDBY PCB.
7. WAVEFORMS OF MAJOR CHECK POINT......................21/22
AUDIO OUT SIGNAL WAVEFORM.
DAC OUTPUT SIGNAL WAVEFORM. 13. MECHANISM........................................................................55
OPTICAL OUTPUT AUDIO DATA SIGNALFORM.
L/R CLOCK DATA WAVEFORM DURING NORMAL PLAY. 14. EXPLODED VIEW...........................................................56/60
SERIAL DATA OUTPUT WAVEFORM DURING NORMAL PLAY. MECHANICAL EXPLODED VIEW
Cr OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. MECHANICAL PARTS LIST
Cb OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.
Y OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. 15. ELECTRICAL PARTS LIST............................................61/70
ELECTRICAL PARTS LIST
8. INTERNAL BLOCK DIAGRAM OF ICs............................23/31

2
1. Safety Precautions

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE laundry tub, in a wet basement, or near a swimming pool,
THIS APPLIANCE TO RAIN OR MOISTURE. and the like.
2. Carts and Stands - The appliance
CAUTION PORTABLE CART
should be used only with a cart or
RISK OF ELECTRIC SHOCKS stand that is recommended by th
DO NOT OPEN manufacturer.
3. An appliance and cart combination
CAUTION :TO REDUCE THE RISK IF ELECTRIC SHOCK, DO NOT should be moved with care. Quick
REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS stops, excessive force, and uneven
INSIDE. surfaces may cause the appliance
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. and cart combination to overturn.
Figure 2 4. Wall or Ceiling Mounting - The appli-
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF UNINSULTED "DANGEROUS VOLTAGE" ance should be mounted to a wall or
WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE ceiling only as recommended by the manufacturer.
SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF 5. Ventilation - The appliance should be situated so that its
ELECTRIC SHOCK TO PERSONS. location or position does not interfere with its proper
ventilation. For example, the appliance should not be situated
THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE
PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE on a bed, sofa, rug, or similar surface that may block the
(SERVICING) INSTRUCTIONS IN THE LITERATURE ventilation openings; or, placed in a built-in installation, such
ACCOMPANYING THE APPLIANCE. as a bookcase or cabinet that may impede the flow of air
through the ventilation openings.
CAUTION 6. Heat - The appliance should be situated away from heat
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC
sources such as radiators, heat registers, stoves, or other
PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET
UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE appliances (including amplifiers) that produce heat.
EXPOSURE. 7. Power Sources - The appliance should be connected to a
power supply only of the type described in the operating
LASER SAFETY instructions or as marked on the appliance.
THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL
8. Grounding or Polarization - The precautions that should be
SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE
DUE TO POSSIBLE EYE INJURY. taken so that the grounding or polarization means of an
appliance is not defeated.
CAUTION : USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES 9. Power - Cord Protection - Power-supply cords should be
OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS routed so that they are not likely to be walked on or pinched
RADIATION EXPOSURE. by items placed upon or against them, paying particular
attention to cords at plugs, convenience receptacles, and the
CAUTION : TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF
PLUG TO WIDE SLOT, FULLY INSERT. point where they exit from the appliance.
10.Protective Attachment Plug - If the appliance is equipped with
ATTENTION : POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE an attachment plug having overload protection. This is a
LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPON- safety feature. See Instruction Manual for replacement or
DANTE DE LA PRISE ET POUSSER JUSQU'AU FOND. resetting of protective device. If replacement of the plug is
required, be sure the service technician has used a
replacement plug specified by the manufacturer that has the
Important Safety Instructions same overload protection as the original plug.
- All the safety and operating instructions should be read before 11.Cleaning - The appliance should be cleaned only as
the appliance is operated. recommended by the manufacturer.
- The safety and operating instructions should be retained for 12.Power Lines - An outdoor antenna should be located away
future reference. from power lines.
- All warnings on the appliance and in the operating instructions
should be adhered to.
- All operating and use instructions should be followed.
1. Water and Moisture - The appliance should not be used near
water - for example, near a bathtub, washbowl, kitchen sink,

3
1. Safety Precautions
13.Outdoor Antenna Grounding - If an outside antenna is 15.Object and Liquid Entry - Care should be taken so that objects
connected to the receiver be sure the antenna system is do not fall and liquids are not spilled into the enclosure through
grounded so as to provide some protection against voltage openings.
surges and built-up static charges. Article 810 of the National 16.Damage Requiring Service - The appliance should be
Electrical Code, ANSI/NFPA 70, provides information with serviced by qualified service personnel when:
regard to proper grounding of the mast and supporting a) The power-supply cord or the plug has been damaged; or
structure, grounding of the lead-in wire to an antenna-dis b) Objects have fallen, or liquid has been spilled into the
charge unit, size of grounding conductors,location of antenna- appliance; or
discharge unit, connection to grounding electrodes and c) The appliance has been exposed to rain; or
requirements for the grounding electrode. See Figure 1. d) The appliance does not appear to operate normally or
exhibits a marked change in performance; or
e) The appliance has been dropped, or the enclosure
EXAMPLE OF ANTENNA
GROUNDING ANTENNA LEAD
damaged.
IN WIRE
17.Servicing - The user should not attempt to service the
appliance beyond that described in the operating instructions.
GROUND CLAMP All other servicing should be referred to qualified service
ANTENNA DISCHARGE UNIT
(NEC SECTION 810-20) personnel.
GROUNDING CONDUCTORS
ELECTRIC (NEC SECTION 810-21)
SERVICE
EQUIPMENT
GROUND CLAMPS
POWER SERVICE GROUNDING
ELECTRODE SYSTEM
NEC - NATIONAL ELECTRICAL CODE (NEC ART 250 PART H)

14.Non-use Periods - The power cord of the appliance should be
unplugged from the outlet when left unused for a long period
of time.

4
2. Specifications
Power supply Power consumption Standby 2Watt
Voltage ( Option ) Operating 80Watt
AC 110V or 120V or 127V or Dimensions (W x D x H) / Weight
220V or 230V or 240V (50/60Hz) 360 x 380 x 70mm/ 6.7 kg

Front Amp. Section
POWER OUTPUT at 1% THD(DIN) At 1KHz, 8 ohms 30W
THD(Total Harmonic Distortion) At 1KHz, 1W 0.1%
Input Sen. / Impedance @ 1KHz, 47K ohms VIDEO, TV/AUX 200mV 30mV/47K
Output Level/Impedance @ 1KHz Video Rec 200mV 30mV/2.2K
Frequency Response(Analogue) at 1W : TV/AUX -3dB 20Hz~20KHz
S/N Ratio IHF-A Weighted TV/AUX 70dB
Subwoofer Turnover Frequency 120Hz
Channel Separation TV/AUX:1KHz 65dB
Crosstalk VIDEO -->TV/AUX 65dB
TV/AUX--> VIDEO 65dB

Center Amp Section
POWER OUTPUT at 1% THD(DIN) At 1KHz, 8 ohms 30W
TOTAL HARMONIC DISTORTION At 1KHz, 1W 0.1%
S/N RATIO, IHF-A FILTER 10W 70dB
FREQUENCY RESPONSE 1W 135Hz~18KHz

Rear Amp Section
POWER OUTPUT 1% THD(DIN) At 1KHz, 8 ohms 30W
TOTAL HARMONIC DISTORTION At 1KHz, 1W 0.1%
S/N RATIO DOLBY 10W 70dB
FREQUENCY RESPONSE 1W 135Hz~18KHz

Subwoofer Section
POWER OUTPUT at 10% THD At 100Hz, 8 ohms 30W
FREQUENCY RESPONSE 1W 20Hz~150Hz
S/N RATIO, IHF-A Weight 60dB

Video Section
Input Sen./Impedance Composite Video(Video) 1Vp-p/75 ohm 0.5 dB
Output Level/Impedance Composite 75 ohm 1Vp-p/75 ohm 0.5 dB
S-Video(Y/C) 75 ohm(DVD only) 1Vp-p/ 0.286Vp-p 0.5 dB
Component Out(Y/ Cb/ Cr):Option 1Vp-p/0.7Vp-p/0.7Vp-p 0.5 dB
Frequency Response Ref 500KHz 5Hz~5.7MHz
Crosstalk @1MHz 45dB 40dB
S/N Ratio DVD 60dB

FM Tuner Section (FM ANT Impedance : 75 ohms)
Tuning Range USA Version 87.5~108.0MHz
Europe Version 87.5~108.0MHz
Scanning USA Version 100KHz
Frequency Interval Europe Version 50KHz

Usable Sensitivity, S/N=30dB,USA Version 2uV(17.2dBf)
75 ohms S/N=26dB,Europe Version 3uV(20.8dBf)
Mono USA Version 70dB
S/N Ratio @1mV Mono Europe Version 70dB
IHF-A FILTER Stereo USA Version 65dB
Stereo Europe Version 63dB

5
3. Location of Users Controls
Front Panel
1) DHC-XD300 Series

DIGITAL HOME CINEMA SYSTEM

PLAY

1. POWER ON/OFF switch 8. OPEN/CLOSE ( ) button
2. DVD/VIDEO CD/MP3 CD/audio CD disc tray 9. PLAY ( ) button
3. Remote Control Sensor 10. STOP ( ) button
4. Display 11. PREV ( ) button
5. MASTER VOLUME control 12. NEXT ( ) button
6. STANDBY indicator 13. FUNCTION button
7. STANDBY/ON button 14. PHONES jack

2) DHC-XD350 Series

DIGITAL HOME CINEMA SYSTEM DHC-XD350

OPEN/CLOSE PLAY STOP PREV NEXT FUNCTION
DOWN VOL. UP

ON/OFF
POWER PHONES
SKIP

6
3. Location of Users Controls
Rear Panel

1. COMPONENT VIDEO OUTPUT Y/Pb/Pr jacks 8. CENTER SPEAKER connector
or SCART jack(Optional) 9. FRONT SPEAKER connector
2. S VIDEO MONITOR OUT jack 10. REAR SPEAKER connector
3. AUX IN jacks 11. WOOFER SPEAKER connector
4. VIDEO (IN) jack 12. FM ANTENNA connector
5. VIDEO (OUT) jack 13. SUBWOOFER output jack
6. DIGITAL OUTPUT jack 14. MONITOR OUT jack
7. DIGITAL IN jack : DHC-XD300P/PS, 350P/PS only 15. Power cord

Display

1. SPEAKER CONFIGURATION indicator 15. PLAY indicator
2. TITLE indicator 16. PAUSE indicator
3. PRESET indicator 17. DTS indicator
4. CHAPTER indicator 18. DSP indicator
5. TRACK indicator 19. PCM indicator
6. FILE indicator 20. PBC(Playback Control) indicator
7. SUB indicator 21. RDS indicator
8. DIR indicator 22. TA/TP indicator
9. TOTAL indicator 23. STEREO indicator
10. REMAIN indicator 24. MUTE indicator
11. SLEEP indicator 25. RANDOM indicator
12. SOURCE indicator 26. REPEAT indicator
13. DOLBY DIGITAL indicator 27. INTRO indicator
14. PROLOGIC / PROLOGIC II indicator 28. Playing Information display

7
3. Location of Users Controls
Remote Controller

1. STANDBY/ON(POWER) button
2. OPEN/CLOSE button
3. MUTE button
4. Input Selector : DVD button
5. Input Selector : TUNER button
6. Input Selector : VIDEO, TV/AUX button
7. FAST REVERSE(FR) ( ) button
8. SKIP PREV ( ) button
9. SPEAKER SETUP button
10. CH LEVEL button
11. PLAY ( ) button
12. STOP( ) button
13. MENU/RETURN button
14. PAUSE/STEP button
15. Number buttons
16. DISPLAY/FM MODE button
17. TEST TONE button
18. SUBTITLE button
19. SLOW button
20. A-B Repeat button
21. ANGLE button
22. RANDOM button
23. DIGEST/RDS MODE button
24. MPX/PTY SEARCH button
25. SLEEP button
26. FAST FORWARD(FF) ( ) button
27. SKIP NEXT ( ) button
28. MOVE / / / /ENTER buttons
29. SURROUND MODE button
30. TITLE button
31. VOLUME / buttons
32. SET-UP button
33. GO TO/AUTO MEMORY button
34. DELAY TIME button
35. AUDIO button
36. ZOOM button
37. REPEAT button
38. PBC button

8
4. Connecting to Equipment
Connecting to TV

21-Pin SCART Cable(not included) to 21-pin SCART input terminal on TV
SCART Specification : Composite and Component Video output(DVD,
Video) Audio L/R Output(DVD only)

If the TV or monitor is equipped with an S video input,
make the S video connection in addition to the normal
video connection. The S video connection will provide
higher quality picture playback.

9
To digital optical audio output
(DHC-XD300P/300PS/350P/350PS Only)

10
4. Connecting to Equipment
Connecting to AUDIO & VIDEO
4. Connecting to Equipment
Connecting to Speakers

Before connecting
Refer also to the instruction manuals of the speakers.
This machine is designed to reproduce optimum sound quality when speakers with the specified impedance below are
connected.Please check the following information and choose speakers with appropriate impedance for the connections.
Front speakers / Center speaker / Surround Speakers : 8 ohms min. per speaker
Subwoofer speaker : 8 ohm min
To prevent damage to circuits, never short-circuit the positive (+) and negative (-) speaker wires.
Do not connect the speaker cable to the L and R connectors at the same time and do not connect more than one speaker to the
same speaker connectors.

GREEN

RED BLUE

ORANGE GRAY

BROWN

Connectiong to Recording Equipments

11
5. Trouble Shooting Guide
Audio Part

1. Basic Operating 2. Front Micom Circuit

Push power on. Push power on.

Does DVD appear
No
Is STANDBY LED on? No at VFD ?

Check POWER SUPPLY
circuit.
Check connection Yes
Yes
CN703, WC700.
Check Power No

Turn Power on. Does loading appear
No
at VFD ?
Yes
Yes
Check Loader.
Check Power Supply circuit
Check connector Yes Check MPEG PCB
WC701 if it normaly?
Is POWER on? No

Does no DISC or
Yes time appear at VFD ?
Check power supply circuit.
Yes

Check MPEG PCB Yes
No
1
Does initial read work No
Check if DVD an Audio
Micom Interface is OK. Yes
Check LASER circuit.
Check focus circuit. No
Yes Check disc.
Check protect circuit. Recheck it
Check if IC703
Pin24, 98 No
is High(+5.0V) ?
Does it play? No
Check +5.0V line.
Check power
Check tracking SERVO supply circuit No Yes
circuit. of Regulator PCB
Yes

Refer to Power Supply Check if IC703
Yes Circuit. Pin18 No
is High ?
Does it output audio? No
Check Power down line.
Check Oscillator of
No Yes
XC700
Yes

Replace XC700 Check if IC703
Yes Pin6, 7, 8 No
OK Check AUDIO circuit.
is High ?

Check if IC703 Pin5
No Yes
is work ?

Replace IC703 Check Protection circuit.
Check DVD Reset control
Yes

Check if
Connector CW704 Pin1 No
to 6 are work ?

Check from Micom
Yes
to DVD Interface

12
5. Trouble Shooting Guide
Front Circuit

Push power on.

LED ON

Yes No
1
STANDBY ON

Yes Check if the
POWER PART of the No
FRONT is OK.

LED OFF No Refer to POWER SUPPLY
Yes circuit.

Check if the CN703
No
Yes is OK.
Check if the
REMOCON waveform of No
the IC703 PIN(31).
Re connect it.
Yes
Does Initial work? No Check if the IC702
PIN(1) is OK. No

Yes
Check if the
No
FRONT POWER is OK. Yes

Refer to POWER SW PCB
Refer to MICOM circuit. Replace IC702. Check RMC circuit.
Yes Refer to POWER SUPPLY
circuit.
CN703 PIN3: +5.6V
PIN8: -30V
Check if the IC703
No
OSC PIN(22) waveform is OK.

Replace XD700.
Yes

Yes

Check if the IC703
No
PIN (24) (98) is OK.

Refer to POWER
Yes SUPPLY circuit.

Check if the FL700 PINS
No
are OK.

Yes

Check PATTERN and
Refer to MICOM circuit.
RESOLDING.
Check if ALL
No
BUTTONS are OK.

Check if POWER PART
Yes No
of the FRONT is OK.

Check if the Refer POWER SUPPLY
VOLUME No Yes circuit.
is OK.

Check IC703
Yes No
PIN(98) (99) (100) OK.

Check if the
No Yes
HEADPHONE is OK?

Refer to MICOM circuit. Refer to KEY-IN line.
Check if the POWER
Yes No
is OK.

Refer to Power Supply Check if POWER PART
Check if the Yes circuit. No
REMOCON is OK. of the FRONT is OK.

No
Check if the J700 Refer to Power Supply
No Yes circuit.
Yes PIN(4) is High.

1 Front PCB OK Check J700 circuit.
Check if IC703
Yes PIN(29) (30) waveform No
OK.

Check if Check
HEADPHONE JACK is No VR700, HR718, HR719
OK. OK.
Yes No

Yes Yes

Replace
Check MAIN PCB. Replace H/P JACK. Refer to MICOM circuit.
VR700, HR718, HR719.

13
5. Trouble Shooting Guide
Audio Part
1. DVD Abnormal(w/o DSP)

AUDIO Abnormal

Check if the WC701 N
is OK. o 1
Reconnect it
Yes

Check if the IC202
Check if the PIN 23,24, 27, 28, 29,
N
CW507 30, 33, 34 and IC201 No
o
waveform is OK. PIN 27, 28, 33, 34
waveform is OK.

Refer to Regulator circuit.
Yes Check if the IC201, 202
No
PIN 14 is OK.

Check if the
N Check POWER circuit.
CW503 PIN 1 to 7 Yes
o Check OSC circuit XC201.
waveform are OK.

Refer to MPEG Decoder
circuit IC501. Check if the
Yes IC201, IC202 PIN 35 is No
Yes High?

Check MICOM Control
Check if the
N circuit.
CW203 PIN 1 to 7 Yes
o
waveform are OK.

Refer to CN203 Refer to STA304A.
Yes

Check if the
N Check if the J801
IC211 PIN 4, 7, 9, 12 No
o waveform is OK.
waveform is OK.

Refer to MUX circuit IC211. Check if the
Yes IC801, IC802, IC803 PIN
No
4, 7, 12, 15 waveform
are OK.

Check if the
N
IC212 PIN 4, 7, 9
o
waveform is OK.
Yes

Refer to MUX circuit IC212. Yes Refer to POWER circuit.

Check if the
Yes IC801, IC802, IC803 PIN No
27 is High.

Yes
1
OK Refer to Digital Amp. Check short parretn.

14
5. Trouble Shooting Guide
Audio Part
2. DVD Abnormal(with DSP)

AUDIO Abnormal

Check if the WC701
No
is OK. 1
Reconnect it
Yes

Check if the IC202
Check if the PIN 23,24, 27, 28, 29,
CW507 No 30, 33, 34 and IC201 No
waveform is OK. PIN 27, 28, 33, 34
waveform is OK.
Refer to Regulator circuit.
Refer to IC302, IC309.
Yes Check if the IC201, 202
No
PIN 14 is OK.

Check if the
CW503 PIN 3 No Check POWER circuit.
Yes
waveform is OK. Check OSC circuit XC201.

Refer to MPEG Decoder
circuit IC501. Check if the
Yes IC201, IC202 PIN 35 is No
Yes High?

Check MICOM Control
Check if the
circuit.
CW304 PIN 20 No Yes
waveform is OK.

Check if the Refer to STA304A.
IC304 PIN 5 No
Yes
waveform is OK.
Refer to Main PCB
12.288MHz.
Check if the Yes
IC301 PIN 39, 40, 41 No Check if the J801
No
waveform are OK. waveform is OK.

Refer to Regulator circuit
Check if the
IC302, IC309 Check if the
IC304 PIN 28
Yes Refer to Reset circuit No IC801, IC802, IC803 PIN
waveform is OK. No
4, 7, 12, 15 waveform
are OK.

Check if the
Yes
CW204 PIN 8, 9, 10, No
waveform are OK.
Yes

Refer to connector Refer to CN203 Check Micom interface line. Yes Refer to POWER circuit.

Check if the
Yes IC801, IC802, IC803 PIN No
27 is High.

Yes
1
OK Refer to Digital Amp. Check short parretn.

15
5. Trouble Shooting Guide
Audio Part

DVD Recout Abnormal H/P output Abnormal

Check if the IC208 Check if the IC202 PIN
No 37 No
is OK.
is OK.

Refer to MPEG PCB.
Refer to DSP PCB. Refer to DDX IC202.
Yes Yes

Check if the Check if the
IC210 PIN 1, 7 No IC203 PIN 12, 15 No
waveform are OK. waveform are OK.

Refer to Filter circuit
IC209, IC210. Refer to DAC IC203.
Yes Yes

Check if the Check if the
IC401 PIN 12, 19 No IC205 PIN 1, 7 No
waveform are OK. waveform are OK.

Refer to Function circuit
IC401. Refer to H/P Amp IC205.
Yes Yes

Check if the
IC406 PIN 1, 7 waveform No Check if the
No
are OK. H/P Jack is OK.

Refer to Filter circuit IC406. Replace H/P Jack.
Yes Yes

Check if the Refer to H/P Control circuit.
J401 No
waveform is OK.

Replace Jack.
Yes

Subwoofer output
Abnormal

Check if the IC101 PIN
37 No
is OK.

Refer to DDX IC201.
Yes

Check if the
IC204 PIN 12 No
waveform is OK.

Refer to DAC IC204.
Yes

Check if the
IC206 PIN 1 No
waveform is OK.

Refer to OP Amp IC206.
Yes

Check if the
No
SW Jack is OK.

Replace SW Jack.

Yes

16
5. Trouble Shooting Guide
Audio Part

Optional in OPTICAL OUT
Abnormal(with DSP Abnormal
option)

Check if the N Check if the IC407
No
IC408 PIN 1 is OK. o PIN 3 waveform is OK.

Check if the IC408 N
Yes
PIN 3 is OK. o Check if the IC407
PIN 1 waveform is OK.

Yes No
Yes Check if the IC405
No
PIN 11 is OK

Refer to POWER SUPPLY
Replace OPTICAL IC.
circuit.
Yes

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