DAEWOO DTQ-27U8SC, DTQ-29U8SS, DTQ-29U8SSP Service Manual

S/M No. : TCN793NEF0

Service Manual

Color Television

CHASSIS : CN-793N

Model : DTQ-27U8SC

DTQ-29U8SS

DTQ-29U8SSP

SPECIFICATIONS

MODEL	DTQ-27U8SC		DTQ-29U8SS		DTQ-29U8SSP
ITEMS
TV Standard			NTSC-M
Power Input	AC 120V 60Hz		AC 120V 50/60Hz		AC 220V 50/60Hz
Power Consumption			125W
	Frequency Synthesizer(FS)Tuning System
	TV VHF(L):CH2-CH6
	UHF(H):CH7-CH13
Tuning ranges	UHF		:CH14-CH69
	CATV VHF(L) :5A, A, B, A-5-A-1
			CH2 - CH6
	VHF(H) :C-W+11
			CH7 - CH13
	UHF		:W+12-W+84
Sound Output	5W+5W		7W+7W		7W+7W
Speaker	8ohm 12W		8ohm 12W 2EA		8ohm 12W 2EA
Antenna Input Impedance	75ohm Unbalanced
	Front: Video, Audio(L,R)
Auxiliary Input Terminal	Rear: Video, Audio(L,R)
	Component Video, Audio(L,R)
Auxiliary Output Terminal	REAR: Video, Audio(L,R)
	Picture IF Carrier Frequency : 45.75MHz
Intermediate Frequencies	Sound IF Carrier Frequency : 41.25MHz
	Color Sub-Carrier Frequency : 42.17MHz
Remote Control			R-43A07
	1) Icon Type		7) Surround
	2) 3-Language OSD		8) AVC
Special Function	3) With CAPTION		9) CVI(Component Video Input)
	4) CH Label		10) Wake-Up/Off Timer
	5) V-Chip		11) Sleep Timer
	6) Dynamic Sound		12) Power Restore

DAEWOO ELECTRONICS CO., LTD

http://svc.dwe.co.kr

Apr. 2002

TABLE OF CONTENTS

TABLE OF CONTENTS	2
CIRCUIT BLOCK DIAGRAM	3
ALIGNMENT INSTRUCTIONS	4
YOUR REMOTE CONTROL	4
SERVICE MODE ADJUSTMENT	5
ASSEMBLY ADJUSTMENT	7
SCHEMATIC DIAGRAM	10
ELECTRICAL PARTS LIST	11
1. DIFFERENT PARTS LIST	22
EXPLODED VIEW	25
PRINTED CIRCUIT BOARD	27

APPENDIX (Appendix is provide only by internet[http://svc.dwe.co.kr])

IC DESCRIPTION	1
CHIP COMPONENTS POSITION	3
TROUBLE SHOOTING GUIDE	5
NO POWER	5
NO PICTURE	6
NO SOUND	7
CH DON’T STOP	8
NO COLOR	9
NO VERTICAL DEFLECTION	9
NO ON-SCREEN DISPLAY	10
NO REMOCON RECEIPT	10

1

SPECIFICATIONS

MODEL	DTQ-27U8SC		DTQ-29U8SS	DTQ-29U8SSP
ITEMS
TV Standard			NTSC-M
Power Input	AC 120V 60Hz		AC 120V 50/60Hz	AC 220V 50/60Hz
Power Consumption			125W
	Frequency Synthesizer(FS)Tuning System
	TV	VHF(L):CH2-CH6
		UHF(H):CH7-CH13
		UHF	:CH14-CH69
Tuning ranges	CATV	VHF(L) :5A, A, B, A-5-A-1
			CH2 - CH6
		VHF(H) :C-W+11
			CH7 - CH13
		UHF	:W+12-W+84
Sound Output	5W+5W		7W+7W	7W+7W
Speaker	8ohm 12W		8ohm 12W 2EA	8ohm 12W 2EA
Antennena Input Impedance	75ohm Unbalanced
	Front: Video, Audio(L,R)
Auxiliary Input Terminal	Rear: Video, Audio(L,R)
	Component Video, Audio(L,R)
Auxiliary Output Terminal	REAR: Video, Audio(L,R)
	Picture IF Carrier Frequency : 45.75MHz
Intermediate Frequencies	Sound IF Carrier Frequency : 41.25MHz
	Color Sub-Carrier Frequency : 42.17MHz
Remote Control			R-43A07
	1) Icon Type		7) Surround
	2) 3-Language OSD		8) AVC
Special Function	3) With CAPTION		9) CVI(Component Video Input)
	4) CH Label		10) Wake-Up/Off Timer
	5) V-Chip		11) Sleep Timer
	6) Dynamic Sound		12) Power Restore

2

CIRCUIT BLOCK DIAGRAM

CN-793N BLOCK DIAGRAM

CVI

A/V IN 1

A/V IN 2

MONITOR OUT

ANT

8.2V

5V

5V

33V

Y

Cb

L

R

BUFF

L-OUT

Cr

SOUND IC I601

SOUND

TU01 TUNER

MSP3420G

VIDEO S/W IC

I504

AMP

DT5-NF20F

MM1118

TDA8946J

9V

SCL SDA

I602

CONTROL

TRAP

SAW

I501

BPF

13.5V

R-OUT

IR

MAIN IC

FILTER

Q501

TB1251N

I701

IF DET

COMB

SCL

SW702

u -COM IC

OUT BUFF

FILTER

CONTROL

CRT : A68X

SDA

I901

~SW707

DW86324DV

TDA9183

-XXX

OSD RGB

5V

VIDEO

P I502

AMP

SCL

RGB

RGB

TEA5101B

EEPROM

5V

I501,I502,I601,TU01

SDA

I702

9V

TV ON SW

9V

7805

7805

I504

x -ray

7809

VERTICAL &

HOR.

33V

PINCUSHION

OUTPUT

12.5V

210V screen focus

HV

DTQ-27(29)U8SC

27V

TA8427K I301

2SD2578 Q402

DTQ-29U8SS

13.5V

11V

8.2V

27V

FBT

T402

AC120V

OCP

FFA94048L

I801

DEFLECTION YOKE

I601

X-RAY

HEATER

POWER IC

SMPS TRANS

STR-F6626 (AC120V)

TSM-5345B1

45V

STR-F6654 (AC220V)

DTQ-29U8SSP

132V

AC220V

PC817C

SE130N

3

ALIGNMENT INSTRUCTIONS

Your Remote Control(R-43A05)

2	MUTE		POWER
			1
	MENU		3
4			4
5	VOL		VOL
3
		CH
	1	2	3
9
	4	5	6
	7	8	9
10	SLEEP	0	PREVIOUS
			11
6	DISPLAY	INPUT	VIDEO
			8
			7

1.POWER

Use this button to turn your TV on or off.

2.MUTE

Use to turn the TV's sound on and off.

3.CH

Use these buttons to change your TV's volume, to activate selections in the menu system.

4.VOL

Use thesebuttons to change your TV's volume, to activate selections in the meny

system, or to change audio and video settings.

5.MENU

Use this button to turn the TV's menu system on and off.

6.DISPLAY

Use this button to display the channel numbeer and status.

7.INPUT

Use this button to select the TV's signal source.

8.VIDEO

Use this button to display video adjustment.

9.0-9

Use these buttons to change channels.

10.SLEEP

Use this button to program the TV to turn off after a certain time.

11.PREVIOUS

Use this button to return to the previous channel you were watching.

4

ALIGNMENT INSTRUCTIONS

1. SERVICE MODE ADJUSTMENTS

Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if service adjustments are required.

1)How to enter the service mode using the user remote control.

•Turn the set on.

•Direct the remote control to the reception window of TV.

•Push buttons of remote control in sequence as follows.

1 MUTE DISPLAY MUTE

• Then, the screen will appear as follows.

	S2	SCRN
	S5	IFC
	S6	GEO
	S8	W/B
	S9	DP
	S10	OPTION CONTROL
	S12	FACT

•Using the channel up or channel down button, select the item you wish to adjust. (The color of selected item turns into the red.)

•Press the volume up or down button to enter in the service mode you wish to adjust.

2)How to memorize the adjusted values in the service mode.

•Must press DISPLAY button the state which the screen is displaying each of service menusafter all adjustments are completed each of all service menu.

Table-A : Adjust the values of service mode when a part is replaced.

PART	ADJUSTMENT			NOTES
REPLACED
	NECESSARY	UNNECESSARY
I701		O	Data is stored in I703.
(U-COM)
I101		O
(MAIN)
I702			Initial setting values are written from I701.
(EEPROM)			ADJUSTING ITEMS
	O		S5	: RFAGCD
			S6	: H.CENTER/V.CENTER/V.SIZE
			S8	: GD/BD/RB/GB/BB
			S9	: DP-brightness
CRT	O		Adjust items related to picture tube only.(White Balance adjustment)

5

ALIGNMENT INSTRUCTIONS

Table-B

MODE	ADJUSTMENT ITEMS		DATA		REMARKS
			INITIAL	RANGE
S2	Screen Adjustment		-	-
S5	AT RAGC
	RF AGC D	*	27	0 ~63	Align RF AGC threshold
	AGC POINT		3.75	3.25~4.0	Select AGC reference voltage
	AFT SEN		100K	25K/100K
	OVR MSW		0	0/1	Must be set to 0
	Q/DT GN		0	0/1	Must be set to 0
	VCO CTR		0	0/1	Must be set to 0
	VCO REQ		0	0/1	Must be set to 0
	VCO STP		0	0/1	Must be set to 0
	CARRIER		0	0/1	Must be set to 0
	BUZ RED		0	0/1	Must be set to 0
	FM/AM CAL		16	0~255	Must be set to 16
	SCART SCAL		15	0~255	Must be set to 15
	MOTR VOL		127	0~255	Must be set to 127
S6	H-CENTER	*	14	0~31	Align sync to flyback pulse,using		cross pattern
	H-SIZE	*	54	0~63	Align sync to flyback pulse,using		cross pattern
	P-CUSHION	*	18	0~63	Align pincution,using cross pattern
	V-CENTER	*	4	0~7	Align vertical DC bias,using	cross pattern
	V-SIZE	*	41	0~63	Align vertical amplitude,using	cross pattern
	V-LIN	*	9	0~15	Align vertical linearity,using	cross pattern
	EW-TRAPEZ	*	14	0~31	Align EW-TRAPEZ,using cross pattern
	V-S		8	0~15	Must be set to 8
	V-RAMP		1	0/1	Must be set to 1
	V-EHT		7	0~7	Must be set to 7
	EW-CORNER		8	0~15	Must be set to 8
	H-EHT		7	0~7	Must be set to 7
S8	G-DRIVE	*	61	0~127	Align green out AC level
	B-DRIVE	*	74	0~127	Align blue out AC level
	R-BIAS		127	0~255	Must be set to 127
	G-BIAS	*	160	0~255	Align green out DC level
	B-BIAS	*	138	0~255	Align blue out DC level
S9	DP-BRIGHT	*	57	0~77	Align common RGB DC level
	DP-CONTRAST		15	0~27
	DP-SHARPNESS		38	0~38
	DP-COLOR		15	0~27
	DP-TINT		40	0~77
	CbCr COR		15	0~31
	CbCr TINT		3	0~31
	SUB CONT		5	0~15
S10	DIGITAL SENSOR		NO	-
	QUASI CHECK		NO	NO/YES
	NO SD POWER OFF		YES	NO/YES
S12	Forwarding Mode		-		Factory initialization

*Indicates the items with different settings each of sets.

6

ALIGNMENT INSTRUCTIONS

* indicates the items with different settings each of sets

2.ASSEMBLY ADJUSTMENTS

1)SCREEN ADJUSTMENT (S2)

•Enter the service mode and select service adjustment S2.

•You can see the one horizontal line on the screen.

•Adjust the Screen Control Volume (located on FBT) so that the horizontal line onscreen may bedisappeared.

•Press the volume up or down button to exit in the screen adjustment mode.

CAUTION

IN THE SCREEN ADJUSTMENT MODE, DONT PRESS OTHER BUTTONS EXCEPT VOLUME UP OR DOWN BUTTON.

2)FOCUS ADJUSTMENT

•Turn in a local station and adjust the Focus Control knob (located on FBT) for best picturedetails at high light condition.

3)RF AGC DELAY ADJUSTMENT (S5)

•Receive a good local channel.

•Enter the service mode and select service adjustment S5.

•You can see the OSD as shown in below.

AT		RAGC		STR		VCO		REQ		0
RF		AGCD		27		VCO		STP		0
AGC		PNT		3.75		CARRIER				0
AFT		SEN		100K		BUZ		RED		0
OVR		MSW		0		FM/AM		CAL		16
Q/DT		GN		0		SCART		SCAL		15
VCO		CTR		0		MOTR		VOL		127
MOVE				ADJUST RECALL : SET

•Select RFAGCD item, press the volume up or down button until noise or beat in picture disappears.

•Press the DISPLAY button to memorize the data.

4)GEOMETRIC ADJUSTMENTS (S6)

•Using the volume up or down button, select internal cross pattern.

•Select service adjustment S6

•You can see the OSD as shown in below.

	H-CENTER		14			V-S		8
	H-SIZE		54			V-RAMP		1
	P-CUSHION		18			V-EHT		7
	V-CENTER		4			EW-CORNER		8
	V-SIZE		41			H-EHT		7
	V-LIN		9
	EW-TRAPEZ		14
	MOVE	ADJUST				RECALL : SET

7

ALIGNMENT INSTRUCTIONS

4-1. Horizontal Position Adjustment

•Select H-CENTER item, adjust H-CENTER data value to obtain proper horizontal centering of theinternal cross pattern at the left and right of the screen.

4-2. Vertical Position Adjustment

• Select V-CENTER item, adjust V-CENTER data value to center the raster properly on the screen.

4-3. Vertical Size Adjustment

• Select “V.SIZE” item, adjust “V.SIZE” data value to proper vertical size as follows.

5)WHITE BALANCE ADJUSTMENT(S8)

•Receive a good local channel.

•Enter the service mode and select service adjustment S8.

•You can see the OSD as shown in below.

	GD		61
	BD		74
	RB		127
	GB		160
	BB		138
MOVE		ADJUST RECALL : SET

•Using volume up or volume down, adjust service adjustment data of RD/GD/BD and RB/GB/BB until a good gray scale with normal whites is obtained.ALIGNMENT INSTRUCTIONS

•Press the DISPLAY button to memorize the data.

8

ALIGNMENT INSTRUCTIONS

6)DIGITAL PRESET(D.P) ADJUSTMENTS(S9) SUBBRIGHTNESS ADJUSTMENT

•Receive a good local channel.

•Enter the service mode and select service adjustment S9.

•You can see the OSD as shoown in below.

	DP-BRIGHT		57		SUB CONT		5
	DP-CONTRAST		15
	DP-SHARPNESS		38
	DP-COLOR		15
	DP-TINT		40
	CbCr CDR		15
	CbCr TINT		3
	MOVE	ADJUST			RECALL : SET

•Select Subbrightness item, adjust Subbrightness data value to obtain normal brightness level.

•Press the DISPLAY button to memorize the data.

CONTRAST

• Fixed value = 15

TINT

• Fixed value = 40

COLOR

•Fixed value = 15

7)FACTORY OUTGOING MODE (S12 : FACT)

•If you select the S12, then the set becomes factory outgoing status.

•You can see the OSD “outgoing OK”

9

SCHEMATIC DIAGRAM

10

ELECTRICAL PARTS LIST

CAUTION

“ is” a safety part, so it must be used the same part.

“ ” is a recommendable part for essential stock.

LOC	PART CODE	PART NAME	PART DESCRIPTION	REMARK	LOC	PART CODE	PART NAME	PART DESCRIPTION	REMARK
ZZ100	48B4343A07	TRANSMITTER REMOCON	R-43A07 (AA)		SP01	4858315210	SPEAKER	SP-78128F02
ZZ110	PTACPWJ936	ACCESSORY AS	DTQ-29U8FC		SP01A	7172401212	SCREW TAPPTITE	TT2 TRS 4X12 MFZNBK
0030	4850Q00810	BATTERY	R6P/LN		SP02	4858315210	SPEAKER	SP-78128F02
0040	48586793E1	MANUAL INSTRUCTION	ENGLISH		SP02A	7172401212	SCREW TAPPTITE	TT2 TRS 4X12 MFZNBK
M821	4858213800	BAG INSTRUCTION	L.D.P.E T0.05X250X400		ZZ290	PTMPMSJ936	PCB MAIN MANUAL AS	DTQ-29U8FC
ZZ120	PTBCSHJ936	COVER BACK AS	DTQ-29U8FC		10	2193102005	SOLDER BAR	SN:PB=63:47 S63S-1320
M211	4852160400	COVER BACK	FR HIPS GY 29U8		30	2291050616	FLUX SOLDER	JS-64T3
M591	4855936700	DECO AV	PVC T0.25		40	2291050301	FLUX SOLVENT	IM-1000
M781	4857817630	CLOTH BLACK	FELT 400X20X0.7		C308	CEYF1E332V	C ELECTRO	25V RSS 3300MF (16X31.5)
M782	4857817612	CLOTH BLACK	FELT 250X20X0.7		C401	CEYD1H689V	C ELECTRO	50V RUB 6.8MF (16*35.5)
ZZ130	PTPKCPJ904	PACKING AS	DTQ-29U8		C405	CMYH3D722J	C MYLAR	2KV BUP 7200PF J
10	6520010100	STAPLE PIN	AUTO W65		C406	CMYH3D752J	C MYLAR	2KV BUP 7500PF J
M681	4856812400	BAND PP AUTO	T1.1XW17mmXL770M		C407	CMYE2J273J	C MYLAR	630V PU 0.027MF J
M801	4858059700	BOX CARTON	DW-3 29U8		C416	CMYE2G364J	C MYLAR	400V PU 0.36MF J
M811	4858198100	PAD	EPS 29U8		C802	CL1UC3104M	C LINE ACROSS	WORLD AC250V 0.1UF M R.47
M821	4858215600	BAG P.E	PE FOAM t0.5x1600x1270		C803	CL1UC3104M	C LINE ACROSS	WORLD AC250V 0.1UF M R.47
ZZ131	58G0000143	COIL DEGAUSSING	DC-29S1		C804	CEYD2D681D	C ELECTRO	200V FHS 680MF (25X40)
ZZ132	48519A4210	CRT GROUND NET	2901H-1015-2P		C809	CH1BFE472M	C CERA AC	AC400V 4700PF M U/C/V
ZZ140	PTCACAJ948	CABINET AS	DTQ-29U8SC		C813	CEYN2D221T	C ELECTRO	200V FWS 220MF (22X30)
M201A	4856015821	SCREW CRT FIX	SWRM+SK5 L=35		C821	CEYF1E332V	C ELECTRO	25V RSS 3300MF (16X31.5)
M201B	4856215402	WASHER RUBBER	CR T2.0		C824	CBYB3D152K	C CERA SEMI	2KV BL(N) 1500PF K
M201E	4856816300	CLAMP WIRE	NYLON 6 (V0)		C831	CEYF1E332V	C ELECTRO	25V RSS 3300MF (16X31.5)
M211A	7172401612	SCREW TAPPTITE	TT2 TRS 4X16 MFZN BK		C888	CH1BFE472M	C CERA AC	AC400V 4700PF M U/C/V
M211B	7172401612	SCREW TAPPTITE	TT2 TRS 4X16 MFZN BK		D402	DRGP30J— -	DIODE	RGP30J
M211C	7178301212	SCREW TAPPTITE	TT2 WAS 3X12 MFZN BK		D431	DDG3———	DIODE	DG3
M541	4855419800	SPEC PLATE	ART 150		D801	PTC1SW8902	HEAT SINK ASS`Y	DPBS606GU- + 7174300811
M686	4856812001	TIE CABLE	NYLON66 DA100		D801	DPBS606GU-	DIODE BRIDGE	PBS606G
V901	4859635261	CRT	A68QDL280X011(B) P45		D801A	4857018902	HEAT SINK	A1050P-H24
ZZ200	PTFMSJJ936	MASK FRONT AS	DTQ-29U8FC		D801B	7174300811	SCREW TAPPTITE	TT2 RND 3X8 MFZN
M191	4851944701	DOOR AS	2823101+5544901 29U8		D810	PTS2SW6900	HEAT SINK ASS`Y	DFMLG16S— + 7128301011
M201	4852078800	MASK FRONT	FR HIPS GY 29U8		00001	DFMLG16S—	DIODE	FML-G16S
M481	4854860900	BUTTON POWER	FR ABS GY 29U8		0000A	4857026900	HEAT SINK	AL EX
M481A	4856716000	SPRING	SWPA PIE0.5		0000B	7174300811	SCREW TAPPTITE	TT2 RND 3X8 MFZN
M491	4854950400	BUTTON CH	FR ABS GY 29U8		D815	DRGP30J— -	DIODE	RGP30J
M491A	7178301011	SCREW TAPPTITE	TT2 WAS 3X10 MFZN		DF01	DLH2PR——	LED BLOCK	LH-2P-R
M501	4855060301	DECO CTRL	PVC T0.25		F801	5F1GB6321L	FUSE GLASS TUBE	UL/CSA TL 6.3A 125V MF51
M561	48556174SD	MARK BRAND	SILVER DIA-CUTTING		I301	PTB2SW7904	HEAT SINK ASS`Y	1TA8427K— + 7174300811
M592	4855936301	DECO EYE	ABS BLUE		I301	1TA8427K—	IC	TA8427K
M592A	7178301011	SCREW TAPPTITE	TT2 WAS 3X10 MFZN		I301A	4857027904	HEAT SINK	AL EX (AN0DIZE)
M791	4857923300	DOOR LOCK	LA701(KIFCO)		I301B	7174300811	SCREW TAPPTITE	TT2 RND 3X8 MFZN
ZZ202	PTSPPWJ904	SPEAKER AS	DTQ-29U8		I409	1KA7809— -	IC REGULATOR	KA7809
PA601	4850704S32	CONNECTOR	YH025-04+YRT205+ULW900500		I501	1TB1251N—	IC	TB1251CN
				11