Daewoo DHC-XD300, DHC-XD350 Service Manual

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9CD8301700

Digital Home Cinema System

DHC-XD300 Series

DHC-XD350 Series

	MENU/RETURN
ANGLE	TIME
ANGLE

DIGITAL HOME CINEMA SYSTEM

PLAY

DHC-XD300 Series

	MENU/RETURN
ANGLE	TIME
ANGLE

DIGITAL HOME CINEMA SYSTEM DHC-XD350
OPEN/CLOSE	PLAY/PAUSE	STOP	PREV	NEXT	FUNCTION	VOL.
					DOWN	VOL.	UP
ON/OFF							PHONES
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
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

PORTABLE CART

Figure 2

1. Safety Precautions

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION

RISK OF ELECTRIC SHOCKS

DO NOT OPEN

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 appliance 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.

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.

EXAMPLE OF ANTENNA
GROUNDING		ANTENNA LEAD
GROUNDING		ANTENNA LEAD
GROUND CLAMP		IN WIRE
		IN WIRE



		ANTENNA DISCHARGE UNIT
		(NEC SECTION 810-20)
ELECTRIC		GROUNDING CONDUCTORS
		GROUNDING CONDUCTORS
		(NEC SECTION 810-21)
SERVICE		(NEC SECTION 810-21)
SERVICE
EQUIPMENT		GROUND CLAMPS
		GROUND CLAMPS
	POWER SERVICE GROUNDING
	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.

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.

2. Specifications

Power supply		Power consumption	Standby	2Watt
Voltage ( Option )	AC 110V or 120V or 127V or		Operating	80Watt

		Dimensions (W x D x H) / Weight
	220V or 230V or 240V (50/60Hz)	Dimensions (W x D x H) / Weight	360 x 380 x 70mm/ 6.7 kg
	220V or 230V or 240V (50/60Hz)

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
Crosstalk	TV/AUX--> VIDEO	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)
S/N Ratio @1mV	Mono USA Version	70dB
	Mono Europe Version	70dB
IHF-A FILTER	Stereo USA Version	65dB
	Stereo Europe Version	63dB

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	VOL.
					DOWN	VOL.	UP
ON/OFF							PHONES
POWER							PHONES
POWER
				SKIP


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

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

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

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.

4. Connecting to Equipment

Connecting to AUDIO & VIDEO

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

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

5. Trouble Shooting Guide

Audio Part

1. Basic Operating

2. Front Micom Circuit

Push power on.

Is STANDBY LED on?

Check POWER SUPPLY

circuit.

Yes

Check connection

CN703, WC700.

Turn Power on.

Yes

Check connector

WC701 if it normaly?

Is POWER on?

Check power supply circuit.

Yes

Check MPEG PCB

Does initial read work

Check LASER circuit.

Check focus circuit.

Yes

Check disc.

Recheck it

Check protect circuit.

Does it play?

Check tracking SERVO

circuit.

Yes

Does it output audio?

Yes

Check AUDIO circuit.

Push power on.

Does DVD appear

at VFD ?

Yes

Does loading appear at VFD ?

Yes

Does no DISC or time appear at VFD ?

Yes

Check if DVD an Audio

Micom Interface is OK.

Check power

supply circuit No of Regulator PCB

	Refer to Power Supply
Yes	Circuit.

Check Oscillator of

XC700

Replace XC700

Yes

Check if IC703 Pin5

is work ?

Check DVD Reset control

Yes

Check if

Connector CW704 Pin1 No to 6 are work ?

			Check from Micom
Yes			Check from Micom
Yes			to DVD Interface
			to DVD Interface

Check Power

Yes

Check Loader.

Check Power Supply circuit

Check MPEG PCB

Yes

Check if IC703 Pin24, 98

is High(+5.0V) ?

Yes

Check if IC703 Pin18

is High ?

Yes

Check if IC703 Pin6, 7, 8 is High ?

Yes

Replace IC703

Check +5.0V line.

Check Power down line.

Check Protection circuit.

5. Trouble Shooting Guide

Front Circuit

Push power on.

LED ON

Yes

STANDBY ON

Yes

LED OFF

Yes

Does Initial work?

Yes

Check if ALL

BUTTONS are OK.

Yes

Check if the VOLUME is OK.

Yes

Check if the

HEADPHONE is OK?

Yes

Check if the

REMOCON is OK.

Yes

Front PCB OK

Check if the

POWER PART of the

FRONT is OK.

Refer to POWER SUPPLY

Yes

circuit.

Check if the CN703

is OK.

Check if the

REMOCON waveform of

Re connect it.

the IC703 PIN(31).

Yes

Check if the IC702

PIN(1) is OK.

Yes

Check if the

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

OSC PIN(22) waveform is OK.

Replace XD700.

Yes

Check if the IC703

PIN (24) (98) is OK.

			Refer to POWER
			Refer to POWER
Yes			SUPPLY circuit.

Check if the FL700 PINS

are OK.

Yes

Refer to MICOM circuit.

Check PATTERN and

RESOLDING.

Check if POWER PART of the FRONT is OK.

No			Yes

Check IC703

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

Yes

Refer to MICOM circuit.

Check if the POWER

is OK.

Refer POWER SUPPLY

circuit.

Refer to KEY-IN line.

Refer to Power Supply

Check if POWER PART

Yes

circuit.

of the FRONT is OK.

Check if the J700

Refer to Power Supply

Yes

circuit.

PIN(4) is High.

Check if IC703

Check J700 circuit.

Yes

PIN(29) (30) waveform

OK.

Check if

Check

HEADPHONE JACK is

VR700, HR718, HR719

OK.

Yes

Check MAIN PCB.

Replace H/P JACK.

Refer to MICOM circuit.

Replace

VR700, HR718, HR719.

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