DAEWOO DTD-29U8ME, DTD-29U8MT, DTD-29U8MP, DTD-29U8MZ Service Manual

S/M No. : TCM905FEF0

Service Manual

Colour Television

CHASSIS : CM-905F

Model : DTD-29U8ME 29U8MT 29U8MP 29U8MZ

MODEL OIPTION LIST

MODEL	TEXT	PIP
ME	O	O
MT	O	X
MP	X	O
MZ	X	X

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr

NOVEMBER.2001

TABLE OF CONTENTS

SPECIFICATIONS ..............................................................................................................	2
SAFETY INSTRUCTION ....................................................................................................	3
CIRCUIT BLOCK DIAGRAM .............................................................................................	4
ALIGNMENT INSTRUCTIONS ..........................................................................................	5
CM-905F TYPICAL SERVICE DATA ..................................................................................	8
SCHEMATIC DIAGRAM .....................................................................................................	11
PRINTED CIRCUIT BOARD ..............................................................................................	12
MECHANICAL EXPLODED VIEW AND PARTS LIST ......................................................	18
ELECTRICAL PARTS LIST ...............................................................................................	19
CM-905F EACH MODEL PARTS LIST ..............................................................................	28

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

IC DESCRIPTION ..............................................................................................................	1
TROUBLE SHOOTING CHARTS ......................................................................................	14

- 1 -

SPECIFICATIONS

Items	Model	DTD29U8ME
		29U8MT
		29U8MP
		29U8MZ
TV Standards		PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)
Mains Voltage		AC 110~250V, 50/60Hz
Power Consumption		130Watts
Sound Ouput		7Watts + 7Watts Over (80% MOD.at 1KHz THD.10%)
Speaker		10W 8 Ohm (2 pcs)
Antenna		75 Ohm Unbalanced. (DIN Standard)
Tuning System		FS Tuning System
Memory Channel		100 Channels
Remocon Control		R-44C07
Reception Channel		VHF - BAND1 : CH2 - CH4
		BAND2 : CH5 - CH12
		CABLE BAND : S1’ - S3, S1 - S20
		HYPER BAND : S21 - S41
		UHF-BAND 4,5 : CH21 - CH69
Remark		OSD ( GUI Format )
		TELETEXT ( Top & Flop Teletext )
		PIP ( AV PIP, Swap, Size, Position )
		Digital Eye

- 2 -

SAFETY INSTRUCTION

NOTE

BEFORE SERVICING THIS CHASSIS READ THE “X-RAY RADIATION PRECAUTIONS”, “SAFETY PRECAUTIONS” AND “PRODUCT SAFETY NOTICE” BELOW.

X-RAY RADIATION PRECAUTIONS

1.Excessive high voltage can produce potentially hazardous X-RAY RADIATION.To avoid such hazards, the high voltage must not exceed the specified limit.The nominal value of the high voltage of this receiver is 29kV(29”) at max beam current.The high voltage must not, under any circumstances, exceed 30.5kV(29”). Each time a receiver requires servicing, the high voltage should be checked. It is recommended the reading

of the high voltage recorded as a part of the service recorded as a part of the service records. It is important to use an accurate and reliable high voltage meter.

2.The only source of X-RAY RADIATION in this TV receiver is the picture tube. For continuous RADIATION protection, the replacement tube must be exactly the same type tube as specified in the “PART LIST”.

SAFETY PRECAUTIONS

1.Potentials of high voltage are present when this receiver is operating. Operation of the receiver outside the cabinet or with the back cover removed involves a shock hazard from the receiver.

1)Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment.

2)Always discharge the picture tube to avoid the shock harzard before removing the anode cap.

3)Discharge the high potential of the picture tube before handling the tube.The picture tube is highly evacuated and if broken, glass fragments will be violently expelled.

2.If any FUSE in this TV receiver is blown, replace it will the FUSE specified in the “PART LIST”.

3.When replacing a high wattage resistor (oxide metal film resistor) in circuit board, keep the resistor 10mm away from circuit board.

4.Keep wires away from high voltage or high temperature components.

5.This receiver must operate between AC 110-250 volts, 50/60Hz. NEVER connect to DC supply or any other power or frequency.

PRODUCT SAFETY

Many electrical and mechanical parts in this chassis have special safety-related characteristics.

These characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in this manual and its supple-

ments, electrical components having such features are identified by designated symbolon the “PART LIST”. Before replacing any of these components, read the “PART LIST” in this manual carefully.

The use of substitute replacement part which do not have the same safety characteristics as specified in the “PART LIST” may created X-RAY RADIATION.

- 3 -

CIRCUIT BLOCK DIAGRAM

- 4 -

ALIGNMENT INSTRUCTIONS

1.AGC ADJUSTMENT

1)Pattern : PAL B/G 10CH Color BAR (RF Level = 60 dB)

2)Connect the Pattern Generator RF Output to Tuner RF Input.

3)Press the S10 Key of Service Remocon to enter the “AGC MODE”.

4)Execute the “AUTO AGC” using the Vol-Up Key.

2.SCREEN ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Press the NORMAL Key to set the “NORMAL 1” mode.

3)Press the S2 Key of Service Remocon.

4)Adjust the SCREEN VOLUME on FBT so that the horizontal line reach the cut-off point.

3.FOCUS ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Adjust the FOCUS VOLUME on FBT to obtain clear resolution.

4.WHITE BALANCE ADJUSTMENT

1)Press the NORMAL Key to set the “NORMAL 1” mode.

2)Press the S8 Key of Service Remocon to enter the “WHITE BALANCE” mode.

3)Adjust the each color ( R,G,B ) which appears abnormally on the screen.

5.GEOMETRIC ADJUSTMENT

1)Press the NORMAL Key to set the “NORMAL 1” mode.

2)Press the S6 Key of Service Remocon to enter the “GEOMETRIC” mode.

5-1.VERTICAL CENTER ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Choose the “V-CENTER” using the Pr-Up/Down Keys.

3)Adjust the horizontal line of picture to coincide with the mechanical center marks of the CRT using the

Vol-Up/Down Keys.

* If the pattern is smaller than the screen, adjust the V-size to fit.

5-2.VERTICAL SIZE ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Choose the “V-SIZE” using the Pr-Up/Down Keys.

3)Adjust the vertical size of the picture using the Vol-Up/Down Keys.

- 5 -

ALIGNMENT INSTRUCTIONS

5-3. HORIZONTAL CENTER ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Choose the “H-CENTER” using the Pr-Up/Down Keys.

3) Adjust the vertical line of picture to coincide with the mechanical center marks of the CRT using the Vol-Up/Down Keys.

5-4. HORIZONTAL SIZE ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Choose the “H-SIZE” using the Pr-Up/Down Keys.

3)Set each side over scan to be 10% using the Vol-up/Down Keys.

5-5. PINCUSHION ADJUSTMENT

1)Pattern : PAL B/G Crosshatch

2)Choose the “PARABOLA” using the Pr-Up/Down Keys. Adjust parabola width to fit on screen.

3)Choose the “CORNER” using the Pr-Up/Down Keys. Adjust coner parabola to fit on screen.

4)Choose the “TRAPEZIUM” using the Pr-Up/Down Keys, Adjust trapezium to fit on screen.

5-6. S-CORRECTION ADJUSTMENT

1)Pattern : PAL B/G Crosshatch

2)Choose the “S-CORRECTION” using the Pr-Up/Down Keys.

3)Adjust each distance of horizontal line to be the same using the Vol-Up/Down Keys.

5-7. SUB-BRIGHTNESS ADJUSTMENT

1)Pattern : PAL B/G Retma

2)Press the NORMAL Keys to set the “NORMAL 1” mode.

3)Adjust the Brightness so that the second line of top appears, as follow.

- 6 -

ALIGNMENT INSTRUCTIONS

6. REMOCON
6-1. SERVICE REMOCON	6-2. USER REMOCON
RECALL MUTE	POWER

S1

S4

S7

S10

TV/CATV

S2	S3
S5	S6
S8	S9
	S12
S11
ADD/ERASE	TV/VIDEO

SOUND

MODE

SURROUND

NOISE CLEAR

		CH
VOL		MENU		VOL
		CH
PIP	POSITION	M/S
	TV/VIDEO	PAUSE/	CH	VOL
		STILL
V-			1	2
POSITION	SIZE	SLEEP
3	4		5	6
7	8		9	0

R-34SVC

6-3. SERVICE REMOCON

1)Enter SERVICE MODE : Press keys of User Remocon, as follows. Ch91, Sharpness 0, Skip(red), Move(green), Menu.

2)Choice SERVICE MENU : Pr-Up/Down

3)Enter SERVICE SUB MENU :Vol-Up/Down

4)Adjust SERVICE MENU :Vol-Up/Down

- 7 -

CM-905F TYPICAL SERVICE DATA

CM-905F SVC KEY & FUNCTION DESCRIPTION

	EY N	NAME		RFUNCTION
	S1	HEATRUN MODE	PRESS THE S1 ONE TINE ----> PRESS THE S1 ANOTHER TIME			ON/OFF
			(HEATRUN MODE)	(NORMAL OPRATION)
		SCREEN	* FBT SCREEN ADJUSTMENT
	S2		PRESS THE S2 ON TIME ----> PRESS THE S2 ANOTHER TIME			ON/OFF
		ADJUSTMENT
			(HORIZONTAL KINE)		(NORMAL OPRATION)
				* SOUND TEST
	S3	SOUND TEST	PRESS THE S3 KEY IS TOGGLE
						Line Production
			VOLUME 00 ----> VOLUME 32 ----> VOLUME 63--->
			BALANS LEFT ----> BALANS RIGHT ----> BALANS 00 ----> RELEASE
				* PICTURE TEST
	S4	PICTURE TEST	PRESS THE S4 KEY IS TOGGLE
						Line Production
			CONTRAST 00 ----> CONTRASR 32 ----> CONTRAST 63 ---->
			RRIGHT 00 ----> BRIGHT 32 ----> BRIGHT 63 ---->
			COLOR 00 ----> COLOR 32 ----> COLOR 63 ----> RELEASE
				* ADJUST NORMAL1 DATA		INITIAL DATA
				CONTRAST 63		63
	S5	NORMAL1		RRIGHT 32		32
				COLOR 32		32
				SHARPNESS 32		32
		NAME	* ADJUST GEOMETRY DATA
			PAL MODE		NTSC MODE	INITIAL DATA(50Hz)
		V-CENTER	05		03	04
		V-SIZE	39		39	27
		H-CENTER	08		12	14
		H-SIZE	36		36	58
	S6	PARABORA	32		32	27
		TRAPEZIUM	16		16	15
		CORNER	06		06	05
		H-EHT	03		03	03
		S-CORRECTION	09		09	07
		V-LINEARITY	08		08	09
		V-EHT	03		03	03
		PIP		* ADJUST PIP DATA		INITIAL DATA
	S7
		R		180		128
		G		180		128
		B		180		128

- 8 -

CM-905F TYPICAL SERVICE DATA

CM-905F SVC KEY & FUNCTION DESCRIPTION

		WHITE BALANCE	* ADJUST WHITE BALANCE DATA
		RB	R LOW BEAM ADJUSTMENT		128
S8		GB	G LOW BEAM ADJUSTMENT		0
		BB	B LOW BEAM ADJUSTMENT		0
		GG	G HIGH BEAM ADJUSTMENT		64
		BG	B HIGH BEAM ADJUSTMENT		32
S9		SUB-BRIGHT	ADJUST BRIGHTNESS DATA		15
		SUB-CONTRAST	ADJUST SUB CONTRAST DATA		15
			* MAIN RF AGC ADJUSTMENT KEY
S10		AGC	TUNER AGC VOLTAGE 3.5Vdc
		AUTO-AGC
		DATA	32
			* OPTION MODE ADJUSTMENT KEY			INITIAL DATA
S11		TEXT	ARABIC/CYRILLIC/IRANIAN/EAST-LATIN//WEST-LATIN			ARABIC
		POWER-ON-START	ON/OFF			ON
		DIGITAL EYE	ON/OFF			ON
			* OUT DATA
		PICTURE	NORMAL 1
		BLUE SCREEN	ON
		CLOCK
		ON TIMER
		ON TIMER	OFF
		ON/OFF
		ON PR	1
		OFF TIMER
S12		OFF TIMER	OFF
		ON/OFF
		LANGUAGE	ENGLISH
		COLOR SYSTEM	PAL
		SOUND SYSTEM	BG
		SOUND MODE	MEMORY
		NAME(EACH PR)	----
		TV/AV1/AV2	TV
		TV/TEXT	TV
		LAST PR	1
		VOLUME	20
		PICTURE SIZE	NORMAL (4:3)

- 9 -

CM-905S/SF TYPICAL SERVICE DATA

CM-905 SVC KEY & FUNCTION DESCRIPTION

S12	CHILD LOCK	OFF
	CH LOCK	OFF

SUB MENU

NO	NAME	SERVICE	RFUNCTION			IITIAL DATA
		REMOCON
		NAME
1	PIP ON / OFF (PIP)	PIP	ON/OFF display a sub-picture			OFF
2	SWAP (PIP)	M/S	The main picture and sub-picture are swapped
		PAUSE/	The sub-picture will be smaller.
3	SIZE (PIP)		To return to be normal size, Press this button
		STILL
			again.
4	TV / VIDEO (PIP)	TV/VIDEO	To select the input for the sub pictrue
5	POSITION (PIP)	POSITION	The display position of the sub-picture will changed
			S2 DATA changed
			RB		128	128
			GB		0	0
6	SCREEN	V-POSITION	BB		0	0
			GG		64	64
			BG		64	64
			Brightness		32	32
7	DIGITAL EYE	V-POSITION	DIGITAL EYE funtion ON/OFF
8	ZOOM	SIZE	Picture size changed ( 4:3 -> 16:9 -> ZOOM -> 4:3 ->)
9	TEXT	SLEEP	TEXT funtion ON/OFF
10	CH UP	CH	USING the SERVICE MODE to Channel UP/DOWN
11	CH DOWN	CH
12	RESISTER	VOL	USING the FACTIRY KEY
13	RELEASE	VOL

- 10 -

SCHEMATIC DIAGRAM

11

PRINTED CIRCUIT BOARD

PCB MAIN

- 12 -

PRINTED CIRCUIT BOARD

- 13 -

PRINTED CIRCUIT BOARD

- 14 -