Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo DHC DHC-X200 & X250 DHC-X200 & X250
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Digital Home Cinema System
DHC-X200/X250
DIGITAL HOME CINEMA SYSTEM
DHC-X200/X250
Contents
1. SAFETY PRECAUTIONS......................................................3/4 12. LEVEL DIAGRAM................................................................32
2. SPECIFICATIONS....................................................................5 13. SCHEMATIC DIAGRAM.................................................33/39
-. FRONT SCHEMATIC DIAGRAM.
3. LOCATION OF USERS CONTROLS....................................6/8 -. DSP SCHEMATIC DIAGRAM.
-. FRONT PANEL. -. MPEG SCHEMATIC DIAGRAM.
-. REAR PANEL. -. MAIN SCHEMATIC DIAGRAM.
-. DISPLAY. -. SCART SCHEMATIC DIAGRAM.
-. REMOTE CONTROLLER.
14. PRINTED CIRCUIT DIAGRAM.......................................40/45
4. CONNECTING TO EQUIPMENT.........................................9/11 -. FRONT PCB.
-. CONNECTING TO TV. 1) TOP VIEW.
-. CONNECTING TO AUDIO & VIDEO. 2) BOTTOM VIEW.
-. CONNECTING TO SPEAKER. -. DSP PCB.
-. CONNECTING TO RECORDING EQUIPMENT. 1) TOP VIEW.
2) BOTTOM VIEW.
5. TROUBLE SHOOTING GUIDE.........................................12/17 -. MPEG PCB.
1) TOP VIEW.
2) BOTTOM VIEW.
6. DVD PROGRAM DOWNLOAD METHOD.............................18 -. MAIN PCB.
-. SCART PCB.
7. WAVEFORMS OF MAJOR CHECK POINT.....................19/20 -. /MIC PCB.
-. AUDIO OUT SIGNAL WAVEFORM. 1) TOP VIEW.
-. DAC OUTPUT SIGNAL WAVEFORM. 2) BOTTOM VIEW.
-. OPTICAL OUTPUT AUDIO DATA SIGNALFORM.
-. L/R CLOCK DATA WAVEFORM DURING NORMAL PLAY. 15. MECHANISM........................................................................46
-. SERIAL DATA OUTPUT WAVEFORM DURING NORMAL PLAY.
-. Cr OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.
-. Cb OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. 16. EXPLODED VIEW...........................................................47/51
-. Y OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. -. MECHANICAL EXPLODED VIEW
-. MECHANICAL PARTS LIST
-. DISASSEMBLY VIEW
8. INTERNAL BLOCK DIAGRAM OF ICs............................21/27
17. ELECTRICAL PARTS LIST............................................52/59
9. IC VOLTAGE CHART.......................................................28/29 -. CONNECTOR LIST
-. ELECTRICAL PARTS LIST
10. BLOCK DIAGRAM...............................................................30 18. OPTION PARTS LIST..........................................................60
11. WIRING DIAGRAM...............................................................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
DHC-X200/X250
5
3. Location of Users Controls
-. Front Panel
1) DHC-X200
MIN MAX MIN MAX
1. POWER ON/OFF switch 16. PHONES jack
2. STANDBY indicator 17. PAUSE ( ) button
3. STANDBY/ON button 18. PLAY ( ) button
4. SKIP/SEARCH DOWN ( ) button 19. STOP ( ) button
5. SKIP/SEARCH UP ( ) button 20. Input selector :
6. DVD/VIDEO CD/MP3 CD/audio CD disc tray VIDEO 1, VIDEO 2, TAPE/MD, TV buttons
7. Remote control sensor 21. Input selector : DVD buttons
8. OPEN/CLOSE ( ) button 22. Input selector : TUNER buttons
9. Display 23. MOVE UP( ) button
10. TUNE/PRESET button 24. MOVE LEFT( ) button
11. FM MODE button 25. ENTER button
12. MENU button 26. MOVE DOWN( ) button
13. TONE button 27. MOVE RIGHT( ) button
14. SURROUND MODE button 28. ECHO LEVEL control(Option)
15. MASTER VOLUME control 29. MIC VOL control(Option)
30. MIC jack(Option)
2) DHC-X250
1. POWER ON/OFF switch 16. MASTER VOLUME control
2. STANDBY indicator 17. PHONES jack
3. STANDBY/ON button 18. TUNE/PRESET button
4. SKIP/SEARCH DOWN ( ) button 19. FM MODE button
5. PLAY ( ) button 20. TONE button
6. SKIP/SEARCH UP ( ) button 21. SURROUND MODE button
7. PAUSE ( ) button 22. ENTER button
8. STOP ( ) button 23. MOVE UP( ) button
9. DVD/VIDEO CD/MP3 CD/audio CD disc tray 24. MOVE LEFT( ) button
10. OPEN/CLOSE ( ) button 25. MOVE DOWN( ) button
11. Remote control sensor 26. MOVE RIGHT( ) button
12. Input selector : 27. MENU button
VIDEO 1, VIDEO 2, TAPE/MD, TV buttons 28. MIC jack(Option)
13. Input selector : DVD buttons 29. ECHO LEVEL control(Option)
14. Display 30. MIC VOL control(Option)
15. Input selector : TUNER buttons
6
3. Location of Users Controls
DHC-X200/X250
-. Rear Panel
1. FM ANTENNA connector 10. Power cord
2. AM ANTENNA connectors 11. FRONT SPEAKERS connectors
3. DIGITAL INPUT OPTICAL jack 12. CENTER SPEAKER connectors
4. DIGITAL INPUT COAXIAL jack 13. SURROUND SPEAKERS connectors
5. DIGITAL OUTPUT OPTICAL jack 14. SUBWOOFER connectors
6. PRE OUT SUBWOOFER jack 15. TV IN jacks
7. MONITOR OUT jack 16. TAPE/MD PLAY(IN)/REC(OUT) jacks
8. S VIDEO MONITOR OUT jack 17. VIDEO 2 IN jacks
9. COMPONENT VIDEO OUTPUT Y/Cb/Cr jacks 18. VIDEO 1 PLAY(IN)/REC(OUT) jack
or SCART jack(Optional)
-. Display
1. SURROUND MODE indicator 10. PRESET indicator
2. RDS indicator 11. REPEAT indicator
3. PROGRAM indicator 12. RANDOM indicator
4. STEREO indicator 13. SLEEP indicator
5. DYNAMIC RANGE indicator 14. PLAY indicator
6. TUNED indicator 15. DVD/VCD/CD indicator
7. PBC(Playback Control) indicator 16. PAUSE indicator
8. MEMORY indicator 17. MULTI FUNCTION indicator
9. MP3 indicator 18. SPEAKER CONFIGURATION indicator
7
3. Location of Users Controls
-. Remote Controller
DHC-X200/X250
1. STANDBY/ON button 16. SUBTITLE button 32. TITLE button
2. DVD FUNCTION button 17. GAME button 33. PLAY MODE button
3. TUNER FUNCTION button 18. ZOOM button 34. STOP( ) button
4. SPEAKER SETUP button 19. DISPLAY button 35. OPEN/CLOSE button
5. INPUT SELECTOR: TV/TAPE/VIDEO 1 20. D-RANGE(Dynamic Range) button 36. SKIP/SEARCH DOWN ( ) button
/VIDEO 2 button 21. FM MODE button 37. SKIP/SEARCH UP ( ) button
6. SET UP button 22. DIMMER button 38. AUDIO button
7. SEARCH button 23. TEST TONE button 39. SLOW button
8. MENU/PBC RETURN button 24. REPEAT/PTY button 40. ANGLE button
9. Number buttons 25. RANDOM/RDS button 41. A-B REPEAT button
10. CLEAR button 26. TUNER PRESET buttons 42. PAL/NTSC button
11. PLAY ( ) button 27. CH LEVEL button 43. SURROUND MODE button
12. PAUSE ( ) button 28. MOVE / / / /ENTER buttons 44. SLEEP button
13. VOLUME / buttons 29. DELAY TIME button 45. MUTING button
14. FAST REWIND(FR) ( ) button 30. TONE button 46. PBC/RT button
15. FAST FORWARD(FF) ( ) button 31. MEMORY button 47. MPX button
8
4. Connecting to Equipment
-. Connecting to TV
DHC-X200/X250
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.
21-Pin SCART Cable(not included) to 21-pin
SCART input terminal on TV
Component, SCART terminal is optional.(Exclusive)
SCART Specification :
Composite Video output(DVD, Video 1, Video 2)
Audio L/R Output(DVD only)
SCART Jack
: For Europe
optional
for America version:
optional
For American version:
Optional
9
4. Connecting to Equipment
-. Connecting to AUDIO & VIDEO
DHC-X200/X250
The OPTICAL INPUT connector is for equipment with a digital Remove the
audio output such as a satellite tuner which is to be connected to protective caps
before making
analog VIDEO 1 connectors instead of a VCR. connections. When
To connect to the OPTICAL INPUT connector, use an optical not in use, be sure to
fiber connection cable. replace them.
If the equipment doesn't have recording functions, you may leave
the analog DIGITAL OUT OPTICAL connectors disconnected.
SCART Jack
: For Europe
optional
This connection is only for
equipment with a digital optical
audio input. Digital recording is
not always possible; therefore,
also connect to the analog
TAPE/MD OUT(REC) jacks.
10
4. Connecting to Equipment
-. Connecting to Speaker
DHC-X200/X250
Front speakers Center speaker
To prevent damage to circuits, never short-
Active subwoofer
[USER Optional]
circuit the positive (+) and negative
Right ch. Left ch. (-) speaker wires.
Do not connect the speaker cable to the L
Audio Input and R connectors at the same time and do
+ + + not connect more than one speaker to the
same speaker connectors.
RED
BLUE BLACK
BLACK BLACK
BLACK BROWN
BLACK
WHITE WHITE
Press and hold Insert the stripped Release the lever to
+ the lever. end of the cord. replace it.
+ +
Right ch. Left ch.
Surround speakers Subwoofer speaker
-. Connecting to Recording Equipment
11
5. Trouble Shooting Guide
-. Audio Part
DHC-X200/X250
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.
Yes Does Video1/2,
Yes Check connection CN906.
MD/TAPE, TV, FM 87.5kHz
appear at VFD ?
Turn Power on. Does loading appear
at VFD ? Yes
Yes
OK
Yes
Is POWER on? No
No
Does no DISC or
No
time appear at VFD ?
Check power supply circuit.
Yes No
Yes
Does initial read work No
Check if DVD an Audio Micom
Interface is OK.
Check LASER circuit.
Check focus circuit.
Yes Check disc. Does it not appear
No
Check protect circuit. DVD Display at VFD ?
Does it apear PCM
Does it play? No No
96kHz Stereo at VFD ?
Check tracking SERVO
circuit.
Yes Yes
Check Power No
Yes
Check Connector
Does it output audio? No No (CP901,CP903) if is
normally. Yes
Check Loader.
Reconnect it. Check Power Supply circuit
Check MPEG PCB
Yes
OK Check AUDIO circuit. Check connector
CN901 if is normally
No 1
Yes
Reconnect it.
Yes
Yes Check if IC904 Pin38
No
is HIGH ?
Check IC904 reset waveform
Check power supply
No
circuit of Main PCB No
Refer to Power Supply Circuit.
Yes Check if IC904 Pin44
No
is High(+5.0V) ?
Check +5.0V line.
Check Oscillator of X901 No
No
Replace X901
Yes Check if IC904 Pin4
No
is Low(0 V) ?
Check Power down line.
Check if IC401 Pin65
No
is work ? No
Check DVD Reset control
Yes
Check if IC904 Pin18
No
is High ?
Check if Connector
No
CN901 Pin4 is work ?
Yes
Check from Micom
Yes Replace IC904 Check Protection circuit.
to DVD Interface
1
12
5. Trouble Shooting Guide
-. Front Circuit
DHC-X200/X250
1
Push power on.
Check if the
POWER PART of the No
FRONT is OK.
LED ON
Refer to POWER SUPPLY
Yes circuit.
Yes No
Check if the
REMOCON waveform of No
STANDBY ON
the IC904 PIN(8).
Yes
Check if the IC905
PIN(13) is OK. No
Yes
LED OFF No
Yes
Check if the CN906 No
Yes is OK. Refer to MICOM circuit. Replace IC905. Check RMC circuit.
Re connect it.
Does Initial work? No
Yes 2 Karaoke option only
Check if the
FRONT POWER is OK. No
Check if the MIC is OK. No
Refer to POWER SW PCB
Yes Refer to POWER SUPPLY Check if the POWER
circuit. Yes No
PART of the MIC is OK.
CN904 PIN4: +5.6V
PIN3: -30V Refer to POWER SUPPLY circuit.
Check if the IC904 CN907 PIN1 : +5V , PIN2 : -30V
OSC PIN(40) waveform No Check if the MIC PIN4 : +5.6V , PIN6 : -12V
Yes PIN8 : +12V
is OK. No VOLUME is OK.
Check if the IC904
No Check if the
PIN(44) is OK. No
Check if the VR901 is CN905 is OK.
No OK.
Yes
Re-connect it.
Yes Yes
Yes Yes
Yes
Replace X901.
Check if the 904
Check if the IC904 Replace VR901. Check PATTERN. No
No PIN(6) is LOW.
PIN (44) (45) is OK.
Refer to POWER Refer to JA901 MIC JACK.
SUPPLY circuit. Check if the ECHO
VOLUME is OK. Yes
Yes IC904 PIN44: +5V
PIN45: -30V
No
Check if the
Check if the FL901 PINS No 905(1)(3) waveform. No
are OK.
Yes
Yes Yes
Check PATTERN and Refer to
Refer to MICOM circuit. Refer to IC ES56033. Front PCB OK. Refer to DSP PCB.
RESOLDING. IC901, IC902, IC903.
Check if ALL
No
BUTTONS are OK.
Yes Check if POWER PART No
of the FRONT is OK.
Check if the Refer POWER SUPPLY
VOLUME No Yes circuit.
is OK.
Check IC904
Yes No
PIN(29) (30) (31) OK.
Check if the
No Yes
HEADPHONE is OK?
Refer to MICOM circuit. Refer to KEY-IN line.
Yes Check if the POWER No
is OK.
Refer to Power Supply
Check if the Yes Check if POWER PART No
circuit.
REMOCON is OK. of the FRONT is OK.
No
Check if the CN903 Refer to Power Supply
No Yes circuit.
Yes PIN(5) is High.
1 2 Check PH991 circuit.
Check if IC904
Yes PIN(7) (24) waveform OK. No
Check if
Check
HEADPHONE JACK is No VR904, R926, R927 OK.
OK.
Yes No
Yes
Yes
Replace
Check MAIN PCB. Replace H/P JACK. Refer to MICOM circuit.
VR904, R926, R927.
13
5. Trouble Shooting Guide
-. Audio Part
DHC-X200/X250
1. DVD Abnormal
AUDIO Abnormal
Check if the CN505
No
is OK. 1
Reconnect it
Yes
Check if the IC524
No
PIN(13) waveform is OK.
Check if the
IC510 PIN(3)(4) No
waveform is OK.
Check if the IC521
No
PIN(3) waveform is OK.
Refer to DIR circuit IC504.
Yes
Refer to Switch circuit IC521.
Yes
Check if the CN502
No
PIN(7) waveform is OK. Yes
Check if the IC522 is OK. No
Refer to OP AMP circuit
IC511.
Yes
Refer to OP-AMP circuit.
Yes
Check if the IC401
No Check CN504 MIC OPTION
PIN(6) waveform is OK.
and R585L/R.
Refer to FUNCTION IC IC401 Check if the CN503
circuit. No
PIN(1) waveform is OK.
Yes
Check if the IC524
No
PIN(31) waveform is OK.
Check if the IC508
No
PIN(20) waveform is OK.
Yes
Refer to OP AMP circuit Yes
IC402, IC512.
Yes
Refer to VOLUME IC
Check OP AMP circuit IC525.
M62446FP.
Check if the IC518 Check if the IC801
No PIN(11) waveform is OK. No
PIN(3) waveform is OK.
Refer to CODEC circuit IC508 Check F_MUTE circuit
same to FR/C/SL/SR/SW. same to C-MUTE, S_MUTE.
Yes Yes
Check if the
Check if the IC521
No SPKOUT waveform is No
PIN(14) waveform is OK.
OK.
Check if the IC518 is OK. No Check if the RELAY
No
CONTROL is OK.
Refer to OP AMP circuit. Refer to RELAY circuit.
Yes Yes
Yes
Yes
Check if the MUTE/
No Check if the
DSP-MUTE is OK. No
IC801 PIN(2).
Yes
Yes
1 Check OP AMP circuit Check MUTE/
Refer to MAIN AMP circuit
IC519, 520. DSP-MUTE circuit. OK Check SPEAKER system.
TDA7265
14
5. Trouble Shooting Guide
-. Audio Part
DHC-X200/X250
OPTICAL OUT
Optional in Abnormal Abnormal
Check if the Check if the IC503
No No
IC501 PIN(1) is OK. PIN(5) waveform is OK.
Refer to DIR circuit IC504
Check if the IC501 AK4112.
No Yes
PIN(3) is OK.
Yes
Yes Check if the IC502
No
PIN(3) is OK
Refer to POWER SUPPLY
Replace OPTICAL IC. Refer to 74HCU04 circuit
circuit.
IC503.
Yes
Check if the IC504
No
PIN(11) waveform is OK.
Check if the IC502
No
PIN(2) is OK.
Refer to 74HCU04 circuit
Yes IC503.
Yes
Check if the IC508
No
PIN(28) waveform is OK. Refer to POWER SUPPLY
OPTICAL OUT OK.
circuit.
Yes
Refer to Dir circuit IC504
Optical in OK
AK4112.
MAIN VOLUME
Abnormal
Check if the
No
COAXIAL-IN Abnormal M62446FP is OK.
Yes
Check if the JA501 Refer to VOLUME IC
No Refer to FRONT PCB.
PIN(1) is OK. M62446FP.
Replace RCA JACK.
Yes
Check if the IC504 Trim VOLUME
No
PIN(13) is OK.
Abnormal.
Refer to 74HCU04 circuit
IC503.
Yes
Check if the
No
CS4228 is OK.
Check if the IC508
No
PIN(28) waveform is OK.
Yes
Yes
Check FRONT PCB. Refer to CODEC IC CS4228.
COAXIAL IN OK refer to DIR circuit AK4112.
REMOTE CONTROL
Abnormal
Check if the IC904
No
PIN8 is OK.
Yes
Refer to MICOM circuit IC904. Refer to RMC IC IC905.
15
5. Trouble Shooting Guide
-. Audio Part
DHC-X200/X250
SOUND Abnormal OPEN/CLOSE Abnormal
Check if the RY801 Check if the FRONT
No No
is OK. CONTROL is OK.
Refer to F_RLY_CONTROL. Check if the PN402
Yes No
is OK.
Yes
Refer to FRONT PCB.
Check if the IC801 Yes
PIN(2)(4) waveform is No
OK.
Check if the CN706
No
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