Daewoo DHC-XD300, DHC-XD350 Service Manual

DHC-XD300 Series DHC-XD350 Series

Digital Home Cinema System

PLAY

DIGITAL HOME CINEMA SYSTEM

VOL.

DOWN UP

OPEN/CLOSE PLAY/PAUSE STOP PREV

SKIP

NEXT FUNCTION

ON/OFF POWER

PHONES

DIGITAL HOME CINEMA SYSTEM DHC-XD350

DHC-XD350 Series

DHC-XD300 Series

MENU/RETURN

ANGLE

TIME

MENU/RETURN

ANGLE

TIME

9CD8301700

1. SAFETY PRECAUTIONS......................................................3/4

2. SPECIFICATIONS....................................................................5

3. LOCATION OF USERS CONTROLS....................................6/8

FRONT PANEL. REAR PANEL. DISPLAY. REMOTE CONTROLLER.

4. CONNECTING TO EQUIPMENT.........................................9/11

CONNECTING TO TV CONNECTING TO AUDIO & VIDEO. CONNECTING TO SPEAKER. CONNECTING TO RECORDING EQUIPMENT.

5. TROUBLE SHOOTING GUIDE.........................................12/19

6. DVD PROGRAM DOWNLOAD METHOD..............................20

7. WAVEFORMS OF MAJOR CHECK POINT......................21/22

AUDIO OUT SIGNAL WAVEFORM. DAC OUTPUT SIGNAL WAVEFORM. OPTICAL OUTPUT AUDIO DATA SIGNALFORM. L/R CLOCK DATA WAVEFORM DURING NORMAL PLAY. SERIAL DATA OUTPUT WAVEFORM DURING NORMAL PLAY. Cr OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. Cb OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT. Y OUTPUT DATA WAVEFORM IN COMPONENT OUTPUT.

8. INTERNAL BLOCK DIAGRAM OF ICs............................23/31

9. BLOCK DIAGRAM............................................................32/35

10. WIRING DIAGRAM...............................................................36

11. SCHEMATIC DIAGRAM..................................................37/45

AMP SCHEMATIC DIAGRAM.

FRONT SCHEMATIC DIAGRAM. DDX SCHEMATIC DIAGRAM. I/O SCHEMATIC DIAGRAM. DSP SCHEMATIC DIAGRAM. MPEG DECODER SCHEMATIC DIAGRAM. MPEG OUTPUT SCHEMATIC DIAGRAM. REGULATOR SCHEMATIC DIAGRAM.

12. PRINTED CIRCUIT DIAGRAM........................................46/54

FRONT PCB. I/O PCB. MPEG PCB. MAIN PCB. REGULATOR PCB. STANDBY PCB.

13. MECHANISM........................................................................55

14. EXPLODED VIEW...........................................................56/60

MECHANICAL EXPLODED VIEW MECHANICAL PARTS LIST

15. ELECTRICAL PARTS LIST............................................61/70

ELECTRICAL PARTS LIST

Contents

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)

WARNING

: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE

THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION :

TO REDUCE THE RISK IF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF UNINSULTED "DANGEROUS VOLTAGE"

WITHIN THE PRODUCT'S ENCLOSURE THAT MAY BE

SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK TO PERSONS.

THIS SYMBOL IS INTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANT OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THE LITERATURE ACCOMPANYING THE APPLIANCE.

CAUTION

TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

LASER SAFETY

THIS UNIT EMPLOYS A LASER. ONLY QUALIFIED SERVICE PERSONNEL SHOULD REMOVE THE COVER OR ATTEMPT TO SERVICE THIS DEVICE DUE TO POSSIBLE EYE INJURY.

CAUTION :

USE OF ANY CONTROLS, ADJUSTMENTS, OR PROCEDURES

OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

CAUTION :

TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF

PLUG TO WIDE SLOT, FULLY INSERT.

ATTENTION :

POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND.

Important Safety Instructions

- All the safety and operating instructions should be read before

the appliance is operated.

- The safety and operating instructions should be retained for

future reference.

- 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,

laundry tub, in a wet basement, or near a swimming pool, and the like.

2. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by th manufacturer.

3. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven

surfaces may cause the appliance and cart combination to overturn.

4. Wall or Ceiling Mounting - The appli-

ance should be mounted to a wall or

ceiling only as recommended by the manufacturer.

5. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air

through the ventilation openings.

6. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.

7. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

8. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an

appliance is not defeated.

9. Power - Cord Protection - Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

10.Protective Attachment Plug - If the appliance is equipped with an attachment plug having overload protection. This is a safety feature. See Instruction Manual for replacement or 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

same overload protection as the original plug.

11.Cleaning - The appliance should be cleaned only as recommended by the manufacturer.

12.Power Lines - An outdoor antenna should be located away from power lines.

CAUTION

RISK OF ELECTRIC SHOCKS

DO NOT OPEN

PORTABLE CART

Figure 2

1. Safety Precautions

13.Outdoor Antenna Grounding - If an outside antenna is connected to the receiver be sure the antenna system is

grounded so as to provide some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting

structure, grounding of the lead-in wire to an antenna-dis charge unit, size of grounding conductors,location of antennadischarge unit, connection to grounding electrodes and requirements for the grounding electrode. See Figure 1.

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.

15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

16.Damage Requiring Service - The appliance should be serviced by qualified service personnel when:

a) The power-supply cord or the plug has been damaged; or b) Objects have fallen, or liquid has been spilled into the

appliance; or c) The appliance has been exposed to rain; or

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

damaged.

17.Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions.

All other servicing should be referred to qualified service personnel.

ANTENNA DISCHARGE UNIT (NEC SECTION 810-20)

ANTENNA LEAD IN WIRE

POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250 PART H)

GROUND CLAMP

ELECTRIC SERVICE EQUIPMENT

GROUNDING CONDUCTORS (NEC SECTION 810-21)

GROUND CLAMPS

EXAMPLE OF ANTENNA GROUNDING

NEC - NATIONAL ELECTRICAL CODE

1. Safety Precautions

2. Specifications

POWER OUTPUT 1% THD(DIN)

TOTAL HARMONIC DISTORTION

S/N RATIO DOLBY

FREQUENCY RESPONSE

FM Tuner Section

(FM ANT Impedance : 75 ohms)

Power supply

Voltage ( Option )

AC 110V or 120V or 127V or 220V or 230V or 240V (50/60Hz)

Power consumption Standby 2Watt

Operating 80Watt

Dimensions (W x D x H) / Weight

360 x 380 x 70mm/ 6.7 kg

POWER OUTPUT at 1% THD(DIN)

THD(Total Harmonic Distortion)

Input Sen. / Impedance @ 1KHz, 47K ohms

Output Level/Impedance @ 1KHz

Frequency Response(Analogue)

S/N Ratio IHF-A Weighted

Subwoofer Turnover Frequency

Channel Separation

Crosstalk

At 1KHz, 8 ohms

At 1KHz, 1W

VIDEO, TV/AUX

Video Rec

at 1W : TV/AUX -3dB

TV/AUX

TV/AUX:1KHz VIDEO -->TV/AUX TV/AUX--> VIDEO

30W

0.1%

200mV±30mV/47K

200mV±30mV/2.2K

20Hz~20KHz

70dB

≤

120Hz 65dB 65dB 65dB

Front Amp. Section

Rear Amp Section

Center Amp Section

Video Section

Input Sen./Impedance

Output Level/Impedance

Frequency Response

Crosstalk

S/N Ratio

Composite Video(Video)

Composite 75 ohm

S-Video(Y/C) 75 ohm(DVD only)

Component Out(Y/ Cb/ Cr):Option

Ref 500KHz

@1MHz

DVD

1Vp-p/75 ohm 1Vp-p/75 ohm

1Vp-p/ 0.286Vp-p

1Vp-p/0.7Vp-p/0.7Vp-p

45dB 60dB

0.5 dB

5Hz~5.7MHz

40dB

POWER OUTPUT at 1% THD(DIN)

TOTAL HARMONIC DISTORTION

S/N RATIO, IHF-A FILTER

FREQUENCY RESPONSE

At 1KHz, 8 ohms

At 1KHz, 1W

10W

30W

0.1%

70dB

135Hz~18KHz

At 1KHz, 8 ohms

At 1KHz, 1W

10W

30W

0.1%

70dB

135Hz~18KHz

Tuning Range

Scanning

Frequency Interval Usable Sensitivity,

75 ohms

S/N Ratio @1mV

IHF-A FILTER

USA Version

Europe Version

USA Version

Europe Version

S/N=30dB,USA Version

S/N=26dB,Europe Version

Mono USA Version

Mono Europe Version

Stereo USA Version

Stereo Europe Version

87.5~108.0MHz

87.5~108.0MHz 100KHz

50KHz

2uV(17.2dBf) 3uV(20.8dBf)

70dB 70dB 65dB 63dB

Subwoofer Section

POWER OUTPUT at 10% THD

FREQUENCY RESPONSE

S/N RATIO, IHF-A Weight

At 100Hz, 8 ohms

30W

20Hz~150Hz

60dB

3. Location of Users Controls

PLAY

DIGITAL HOME CINEMA SYSTEM

Front Panel

1) DHC-XD300 Series

2) DHC-XD350 Series

DIGITAL HOME CINEMA SYSTEM DHC-XD350

VOL.

DOWN UP

OPEN/CLOSE PLAY STOP PREV

SKIP

NEXT FUNCTION

ON/OFF POWER

PHONES

1. POWER ON/OFF switch

2. DVD/VIDEO CD/MP3 CD/audio CD disc tray

3. Remote Control Sensor

4. Display

5. MASTER VOLUME control

6. STANDBY indicator

7. STANDBY/ON button

8. OPEN/CLOSE ( ) button

9. PLAY ( ) button

10. STOP ( ) button

11. PREV ( ) button

12. NEXT ( ) button

13. FUNCTION button

14. PHONES jack

1. POWER ON/OFF switch

2. DVD/VIDEO CD/MP3 CD/audio CD disc tray

3. Remote Control Sensor

4. Display

5. MASTER VOLUME control

6. STANDBY indicator

7. STANDBY/ON button

8. OPEN/CLOSE ( ) button

9. PLAY ( ) button

10. STOP ( ) button

11. PREV ( ) button

12. NEXT ( ) button

13. FUNCTION button

14. PHONES jack

3. Location of Users Controls

Rear Panel

Display

1. SPEAKER CONFIGURATION indicator

2. TITLE indicator

3. PRESET indicator

4. CHAPTER indicator

5. TRACK indicator

6. FILE indicator

7. SUB indicator

8. DIR indicator

9. TOTAL indicator

10. REMAIN indicator

11. SLEEP indicator

12. SOURCE indicator

13. DOLBY DIGITAL indicator

14. PROLOGIC / PROLOGIC II indicator

15. PLAY indicator

16. PAUSE indicator

17. DTS indicator

18. DSP indicator

19. PCM indicator

20. PBC(Playback Control) indicator

21. RDS indicator

22. TA/TP indicator

23. STEREO indicator

24. MUTE indicator

25. RANDOM indicator

26. REPEAT indicator

27. INTRO indicator

28. Playing Information display

1. COMPONENT VIDEO OUTPUT Y/Pb/Pr jacks or SCART jack(Optional)

2. S VIDEO MONITOR OUT jack

3. AUX IN jacks

4. VIDEO (IN) jack

5. VIDEO (OUT) jack

6. DIGITAL OUTPUT jack

7. DIGITAL IN jack : DHC-XD300P/PS, 350P/PS only

8. CENTER SPEAKER connector

9. FRONT SPEAKER connector

10. REAR SPEAKER connector

11. WOOFER SPEAKER connector

12. FM ANTENNA connector

13. SUBWOOFER output jack

14. MONITOR OUT jack

15. Power cord

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

/  /  / 

4. Connecting to Equipment

Connecting to TV

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 SCART Specification : Composite and Component Video output(DVD,

Video) Audio L/R Output(DVD only)

4. Connecting to Equipment

Connecting to AUDIO & VIDEO

(DHC-XD300P/300PS/350P/350PS Only)

To digital optical audio output

4. Connecting to Equipment

Connecting to Speaker

Connectiong to Recording Equipments

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.

RED

BLUE

GREEN

GRAY

ORANGE

BROWN

5. Trouble Shooting Guide

1. Basic Operating

Is STANDBY LED on?

Push power on.

Is POWER on?

Does initial read work

Turn Power on.

Does it play?

Does it output audio?

Yes

Check AUDIO circuit.

Check tracking SERVO

circuit.

Check LASER circuit.

Check focus circuit.

Check disc.

Check protect circuit.

Check power supply circuit.

Check POWER SUPPLY

circuit.

Check connection

CN703, WC700.

2. Front Micom Circuit

Replace IC703

Yes

Check if IC703

Pin24, 98

is High(+5.0V) ?

Check +5.0V line.

Check if IC703

Pin18

is High ?

Check Power down line.

Check if IC703

Pin6, 7, 8 is High ?

Yes

Check Protection circuit.

Yes

Does DVD appear

at VFD ?

Push power on.

Does loading appear

at VFD ?

Yes

Does no DISC or

time appear at VFD ?

Yes

Check if DVD an Audio Micom Interface is OK.

Yes

Check from Micom

to DVD Interface

Check Power

Check Loader.

Check MPEG PCB

Yes

Check Power Supply circuit

Check power supply circuit

of Regulator PCB

Yes

Refer to Power Supply

Circuit.

Check Oscillator of

XC700

Yes

Replace XC700

Check if IC703 Pin5

is work ?

Yes

Check DVD Reset control

Check if

Connector CW704 Pin1

to 6 are work ?

Yes

Check connector

WC701 if it normaly?

Check MPEG PCB

Yes

Recheck it

Audio Part

5. Trouble Shooting Guide

Check if the

POWER PART of the

FRONT is OK.

Check if the

REMOCON waveform of

the IC703 PIN(31).

Refer to MICOM circuit.

Refer to POWER SUPPLY

circuit.

Check if the IC702

PIN(1) is OK.

Replace IC702. Check RMC circuit.

Yes

LED ON

Push power on.

Yes

LED OFF

Yes

Check if ALL

BUTTONS are OK.

Check if the

FRONT POWER is OK.

Yes

Check if the IC703

OSC PIN(22) waveform is OK.

Yes

Check if the IC703

PIN (24) (98) is OK.

Check if POWER PART

of the FRONT is OK.

Replace XD700.

Check if the

VOLUME

is OK.

Check if the

HEADPHONE is OK?

Check if the

REMOCON is OK.

Yes

Check if the CN703

is OK.

Check if the FL700 PINS

are OK.

Yes

STANDBY ON

Yes

Re connect it.

Refer to POWER SW PCB Refer to POWER SUPPLY

circuit.

CN703 PIN3: +5.6V

PIN8: -30V

Refer to POWER

SUPPLY circuit.

Refer POWER SUPPLY

circuit.

Check IC703

PIN(98) (99) (100) OK.

Refer to MICOM circuit.

Refer to KEY-IN line.

Check PATTERN and

RESOLDING.

Yes

Check if the POWER

is OK.

Check if the J700

PIN(4) is High.

Check if

HEADPHONE JACK is

OK.

Check MAIN PCB.

Check J700 circuit.

Replace H/P JACK.

Refer to Power Supply

circuit.

Yes

Check if POWER PART

of the FRONT is OK.

Check if IC703

PIN(29) (30) waveform

OK.

Refer to MICOM circuit.

Refer to Power Supply

circuit.

Check

VR700, HR718, HR719

OK.

Replace

VR700, HR718, HR719.

Yes

Refer to MICOM circuit.

Yes

Does Initial work? No

Front PCB OK

Front Circuit

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