DAEWOO DTQ-20S1SSFV, DTQ-2130SSFV, DTQ-21D7SSPV, DTQ-21U6SSFV, DTQ-21U6SSV Service Manual

S/M No : TCN402FEF0

Service Manual

Color Television

CHSSIS MODEL

CN-402FN DTQ-20S1SSFV DTQ-2130SSFV DTQ-21D7SSPV DTQ-21U6SSFV DTQ-21U6SSV

Caution

:In this Manual, some parts can be changed for improving. their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service Information Center.

MAR. 2006

TABLE OF CONTENTS

5

CIRCUIT BLOCK DIAGRAM

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

IC DESCRIPTION	14
UOC III SERIES	14
TDA8358J VERTICAL AMPLIFIER	26
TDA6107AJF	28
24WC16-16 KB EEPROM	29
LA42072N-E AUDIO AMPLIFIER	30
STR-W6735/56	31
WAVEFORMS	33
TROUBLE SHOOTING GUIDE	35
NO POWER	35
NO PICTURE	36
NO SOUND	37
CH DON’T MEMORY or SKIP	38
NO COLOR	39
NO VERTICAL DEFLECTION	39
REMOTE CONTROL DOESNOT OPERATE	40
ELECTRICAL PARTS LIST	41
DIFFERENT PARTS LIST	53
PRINTED CIRCUIT BOARD	56
SCHEMATIC DIAGRAM	59
EXPLODE VIEW	61

-1-

CN-402FN 21" MODEL for US(With Component Input)

3W 8 ohm

3W 8 ohm

-6-

21"

195V

+44V

+122V

+44V

7.7V/5V

+122V

+195V

+47V

+47V

+14V

DIAGRAM BLOCK CIRCUIT

ALIGNMENT INSTRUCTION

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.

SERVICE 02

SERVICE 03

SERVICE 04

SERVICE 05

SERVICE 06

SERVICE 07

SERVICE 08

SERVICE 09

SERVICE 10

SERVICE 11

SERVICE 12

V W SELECT C B ADJUST L EXIT

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

-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.

-Don’t have to press any button the state which the screen is displaying each of service menus after 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 I702.
(U-COM)
				Initial setting values are written from I701.
I702				ADJUSTING ITEMS
(EEPROM)		O		S6	: Geometry adjustmrnt
				S8	: White balance
				S9	: Subbrightness
					Adjust items related to picture tube only.
CRT		O		(White Balance adjustment)
				CRT OPTION (Screen Option adjustment)

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ALIGNMENT INSTRUCTION

DTQ-20S1SSFV EEPROM DATA (050407)

CN-402FN

MODE	NAME	VAL	REMARKS	MODE	NAME		VAL	REMARKS
S1	HEAT RUN	RUN OFF			SOC		0
S2	SCREEN ADJUST	580V			PWLDAC		0
					CL		4
S5	AGC LEVEL	22			CLD		0
	IFOFF	37			GAM		1
	QSS	1			HCT		0
	BPB	1		S7-2	ACL		0
	FMI	1			BPS		0
	AGN	0			CHSE		2
	BPBS	1			FCO		0
	DSG	RF:0, AV:1			CBPS		0
	Fine Tunning				CB		0
	FILTBW	0			MUS		0
	IDMOD	1			FFI		0
	OVMTHR	1			R-GAIN		32
	IDMOD SLOW KOR	1			G-GAIN		32
	V.SIZE	31			B-GAIN		40
	V.CENTER	36			R-BIAS		32
	V.SLOPE	33		S8	G-BIAS		32
	V.LINEARITY	35			SRC R-BIAS		32
	S_CORRECTION	20			SRC G-BIAS		32
	H.CENTER	45			CVI R-BIAS		0
S6	H.SIZE	54			CVI G-BIAS		0
	H.PARALLEL	44			DP-Brightness		10
	H-BOW	35		S9	DP-Contrast		10
	PARABOLA	17			DP-Color		5
	EW TRAPEZ	38			DP-Sharpness		18
	CORNER TOP	54		S10	OPTION
	CORNER BOTTOM	46		S12	FACTORY SET
	CFCLF	1
	YD TV	RF:4, AV:7
	DTR	0
	BPYD	0			* VOLUME : CENTER (32)
	TCCON	1
	TCI2X	0			* OPTION 1 : 1110 1001
	PF	3			OPTION 2 : 0110 0011
					OPTION 3 : 0000 0010
	TFR	1
	NRR	0			* SCREEN : 6AE ---> 18 (HEX)
S7-1	WS	3
	BLS	0
	DSK	0
	AAS	2
	BSD	0
	BKS	1
	DSA	0
	RPO	3
	RPA	2
	BPD	0
	CFA0	1

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ALIGNMENT INSTRUCTION

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 be disappeared.

Press S2 button to exit in the screen adjustment mode.

2) FOCUS ADJUSTMENT

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

3) AGC ADJUSTMENT

Adjust the antenna signal level at 60 dBuV

Tune a colour bar pattern.

Find the "AGC" item in service mode.

(it's two way to entering the"AGC" item in service mode)

-Enter the service mode and select service adjustment S5 and select AUTO-AGC.

-Enter the service mode and select service adjustment S3.

Wait until AGC level stabilise to the optimum value.

Alternatively,

Enter the service mode and select service adjustment S5 and select AGC LEVEL. Use "Vol Up/Dwn" keys to adjust manually to the desired Tuner Take Over Point.

4) GEOMETRIC ADJUSTMENTS (S6)

Select service adjustment S6

You can see the OSD as shown in below.

V.SIZE	43	H.PARALLEL			33
V.CENTER	42	H-BOW			35
V.SLOPE	28	PARABOLA			17
V.LINEARITY	37	EW TRAPEZ			38
S_CORRECT	32	CORNER TOP			54
H.CENTER	45	CORNER BOTTOM			46
H.SIZE	54
	SELECT	ADJUST		EXIT

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ALIGNMENT INSTRUCTION

4-1) Vertical Position Adjustment.

-Select V.SLOPE item, adjust V.SLOPE data value till the horizontal line in the centre of the video signal is just at the position where the blanking stars.

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

4-2) Vertical Size Adjustment

- Select V.SIZE item, adjust V.SIZE data value to proper vertical size as follows.

4-3) Horizontal Position Adjustment

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

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ALIGNMENT INSTRUCTION

4-4). H.BOW, PARABOLA Adjustment

*Adjust the H.BOW, PARABOLA to compensate for geometrical distortion.

*You can not adjust the H.PARALLEL, H.SIZE, EW TRAPEZ, CORNER TOP and CORNER BOTTOM.

H.PARALLEL

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ALIGNMENT INSTRUCTION

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.

R-GAIN	32
G-GAIN	32
B-GAIN	40
R-BIAS	32
G-BIAS	32

SELECT

SRC R-BIAS	32
SRC G-BIAS	32
CVI R-BIAS	-8
CVI G-BIAS	10

ADJUST EXIT

Using volume up or volume down, adjust service adjustment data of R-GAIN/G-GAIN/B-GAIN and R-BIAS/G-BIAS until a good gray scale with normal whites is obtained.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 shown in below.

DP-Brightnes 10

DP-Contrast 10

DP-Color 5

DP-Sharpnes 18

SELECT ADJUST EXIT

Select DP-Brightness item, adjust DP-Brightness data value to obtain normal brightness level.

DP-Contrast

Fixed value = 10

DP-Color

Fixed value = 5

DP-Sharpness

Fixed value = 18

7) FACTORY OUTGOING MODE (S12 : FACT)

If you select the S12, then the set becomes factory outgoing status. You can see the OSD "SHIPPING OFF"

-13-

IC DESCRIPTION

1. UOC III SERIES

1-1. UOC III BLOCK DIAGRAM

-14-

-19-

VSSC 1

P0.5/INT0//P1.2 2

VDDC(1.8)/RESET 3

P1.0/INT1 4

P1.1/T0 5

P1.3/T1 6

P1.6/SCL1 7

P1.7/SDA 8

VDDP(3.3) 9

P2.0/TPMW//P0.4 10

P2.1/PWM0//P0.1 11

P3.0/ADC0 12

P3.1/ADC1 13

P3.2/ADC2 14

P3.3/ADC3 15

VDDA1(3.3V) 16

GNDA1 17

XTALIN 18

XTALOUT 19

VSSA1 20

DECDIG 21

VP1 22

PH2LF 23

PH1LF 24

GND1 25

SECPLL 26

DECBG 27

VIFIN1 28

VIFIN2 29

VSC 30

IREF 31

GNDIF 32

DVBIN1/SIFIN1 33

DVBIN2/SIFIN2 34

AGCOUT 35

AUDIOIN5L 36

AUDOUTSL 37

AUDOUTSR 38

GND2 39

PLLIF 40

SIFAGC/DVBAGC 41

DVBO//IFVO/FMRO 42

VCC8V 43 AGC2SIF/SWO/AVL/ 44 SSIF/REFIN/REFOUTVP2 45

version) (standard	STEREO-FULL HERCULES
	(SSDIP90)

90 VDDA(1.8V)

89 VREFAD

88 VDDA3(3.3V)

87 GNDA2

86 VDDA2(3.3V.)

85 BO

84 GO

83 RO

82 BLKIN

81 BCLIN

80 VP3

79 GND3

78 B/PB-3

77 G/Y-3

76 R/PR-3

75 INSSW3

74 YOUT

73 YSYNC

72 CVBSX

71 VDDcomb

70 VSScomb

69 VGUARD/SWIO

68 VDRB

67 VDRA

66 AVL/EWD

65 EHTO

64 HOUT

63 FBISO/CSY

62 SVM

61 CVBSO/PIP

60 AUDOUTHPR

59 AUDOUTHPL

58 AUDOUTLSR

57 AUDOUTLSL

56 C2/3

55 CVBS3/Y3

54 AUDIOIN3R//P1.5/P2.5

53 AUDIOIN3L//P1.4/P2.4

52 CVBS2/Y2

51 AUDIOIN2R//P0.0

50 AUDIOIN2L//P0.2

49 CVBS4

48 AUDIOIN4R//P2.3

47 AUDIOIN4L//P2.2

46 SVO/IFOUT/CVBSI

DESCRIPTION IC

IC DESCRIPTION

	STANDARD							FACE DOWN
		VERSION							VERSION
SYMBOL	+ STEREO QFP128 STEREO AV		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	QFP128 STEREO AV	+ STEREO		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	DESCRIPTION
VSSP2	1			1			128				90			ground
VSSC4	2			1			127				90			ground
VDDC4	3			3			126				88			digital supply to SDACs (1.8V)
VDDA3(3.3V)	4			16			125				75			supply (3.3 V)
VREF_POS_LSL	5			16			124				75			positive reference voltage SDAC (3.3 V)
VREF_NEG_LSL+HPL	6			17			123				74			negative reference voltage SDAC (0 V)
VREF_POS_LSR+HPR	7			16			122				75			positive reference voltage SDAC (3.3 V)
VREF_NEG_HPL+HPR	8			17			121				74			negative reference voltage SDAC (0 V)
VREF_POS_HPR	9			16			120				75			positive reference voltage SDAC (3.3 V)
XTALIN	10			18			119				73			crystal oscillator input
XTALOUT	11			19			118				72			crystal oscillator output
VSSA1	12			20			117				71			ground
VGUARD/SWIO	13			69			116				22			V-guard input / I/O switch (e.g. 4 mA current
														sinking capability for direct drive of LEDs)
DECDIG	14			21			115				70			decoupling digital supply
VP1	15			22			114				69			1st supply voltage TV-processor (+5 V)
PH2LF	16			23			113				68			phase-2 lter
PH1LF	17			24			112				67			phase-1 lter
GND1	18			25			111				66			ground 1 for TV-processor
SECPLL	19			26			110				65			SECAM PLL decoupling
DECBG	20			27			109				64			bandgap decoupling
EWD/AVL (1)	21			66			108				25			East-West drive output or AVL capacitor
VDRB	22			68			107				23			vertical drive B output
VDRA	23			67			106				24			vertical drive A output
VIFIN1	24			28			105				63			IF input 1

-20-

IC DESCRIPTION

	STANDARD							FACE DOWN
		VERSION							VERSION
SYMBOL	+ STEREO QFP128 STEREO AV		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	QFP128 STEREO AV	+ STEREO		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	DESCRIPTION
VIFIN2	25			29			104				62			IF input 2
VSC	26			30			103				61			vertical sawtooth capacitor
IREF	27			31			102				60			reference current input
GNDIF	28			32			101				59			ground connection for IF ampli er
SIFIN1/DVBIN1 (2)	29			33			100				58			SIF input 1 / DVB input 1
SIFIN2/DVBIN2 (2)	30			34				99			57			SIF input 2 / DVB input 2
AGCOUT	31			35				98			56			tuner AGC output
EHTO	32			65				97			26			EHT/overvoltage protection input
AVL/SWO/SSIF/	33			44				96			47			Automatic Volume Levelling / switch output /
REFO/REFIN (2)														sound IF input / subcarrier reference output /
														external reference signal input for I signal mixer
														for DVB operation
AUDIOIN5	-			-			-			-				audio 5 input
AUDIOIN5L	34		36/-					95		55/-				audio-5 input (left signal)
AUDIOIN5R	35			-				94			-			audio-5 input (right signal)
AUDOUTSL	36			37				93			54			audio output for SCART/CINCH (left signal)
AUDOUTSR	37			38				92			53			audio output for SCART/CINCH (right signal)
DECSDEM	38		-/72					91		-/19				decoupling sound demodulator
QSSO/AMOUT/AUDEEM (2)	39		-/36					90		-/55				QSS intercarrier output / AM output /
														deemphasis (front-end audio out)
GND2	40			39				89			52			ground 2 for TV processor
PLLIF	41			40				88			51			IF-PLL loop lter
SIFAGC/DVBAGC (2)	42			41				87			50			AGC sound IF / internal-external AGC for DVB
														applications
DVBO/IFVO/FMRO (2)	43			42				86			49			Digital Video Broadcast output / IF video output /
														FM radio output
DVBO/FMRO (2)	44			-				85			-			Digital Video Broadcast output / FM radio output
VCC8V	45			43				84			48			8 Volt supply for audio switches

-21-

IC DESCRIPTION

	STANDARD							FACE DOWN
		VERSION							VERSION
SYMBOL	+ STEREO QFP128 STEREO AV		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	QFP128 STEREO AV	+ STEREO		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	DESCRIPTION
AGC2SIF	46		44/-					83		47/-				AGC capacitor second sound IF
VP2	47			45				82			46			2nd supply voltage TV processor (+5 V)
IFVO/SVO/CVBSI (2)	48			46				81			45			IF video output / selected CVBS output / CVBS
														input
AUDIOIN4	-			-			-			-				audio 4 input
AUDIOIN4L	49			47				80			44			audio-4 input (left signal)
AUDIOIN4R	50			48				79			43			audio-4 input (right signal)
CVBS4/Y4	51			49				78			42			CVBS4/Y4 input
C4	52			-				77			-			chroma-4 input
AUDIOIN2	-			-			-			-				audio 2 input
AUDIOIN2L	53			50				76			41			audio 2 input (left signal)
AUDIOIN2R	54			51				75			40			audio 2 input (right signal)
CVBS2/Y2	55			52				74			39			CVBS2/Y2 input
AUDIOIN3	-			-			-			-				audio 3 input
AUDIOIN3L	56			53				73			38			audio 3 input (left signal)
AUDIOIN3R	57			54				72			37			audio 3 input (right signal)
CVBS3/Y3	58			55				71			36			CVBS3/Y3 input
C2/C3	59			56				70			35			chroma-2/3 input
AUDOUTLSL	60			57				69			34			audio output for audio power ampli er (left
														signal)
AUDOUTLSR	61			58				68			33			audio output for audio power ampli er (r ight
														signal)
AUDOUT/AMOUT/FMOUT	-			-			-			-				audio output / AM output / FM output, volume
														controlled
AUDOUTHPL	62			59				67			32			audio output for headphone channel (left signal)
AUDOUTHPR	63			60				66			31			audio output for headphone channel (right
														signal)
CVBSO/PIP	64			61				65			30			CVBS / PIP output

-22-

IC DESCRIPTION

		STANDARD							FACE DOWN
			VERSION							VERSION
SYMBOL		+ STEREO QFP128 STEREO AV		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO	QFP128 STEREO AV	+ STEREO		SSDIP90 STEREO AV MONO+	STEREO/-FULL		MONO			DESCRIPTION
SVM		65			62				64			29			scan velocity modulation output
FBISO/CSY		66			63				63			28			ybac k input/sandcastle output or composite H/V
															timing output
HOUT		67			64				62			27			horizontal output
VSScomb		68			70				61			21			ground connection for comb lter
VDDcomb		69			71				60			20			supply voltage for comb lter (5 V)
VIN (R/P	IN2/C )	70			-				59			-			V-input for YUV interface (2nd R input / P input
R	X														or CX input)		R
UIN (B/PBIN2)		71			-				58			-			U-input for YUV interface (2nd B input / PB input)
YIN (G/YIN2/CVBS-YX)		72		72/-					57		19/-				Y-input for YUV interface (2nd G input / Y input
															or CVBS/YX input))
YSYNC		73			73				56			18			Y-input for sync separator
YOUT		74			74				55			17			Y-output (for YUV interface)
UOUT (INSSW2)		75			-				54			-			U-output for YUV interface (2nd RGB / YP P
															insertion input)		B R
VOUT (SWO1)		76			-				53			-			V-output for YUV interface (general purpose
															switch output)
INSSW3		77			75				52			16			3rd RGB / YP P insertion input
															B		R
R/P IN3		78			76				51			15			3rd R input / P	R	input
R
G/YIN3		79			77				50			14			3rd G input / Y input
B/P IN3		80			78				49			13			3rd B input / P	B	input
B
GND3		81			79				48			12			ground 3 for TV-processor
VP3		82			80				47			11			3rd supply for TV processor
BCLIN		83			81				46			10			beam current limiter input
BLKIN		84			82				45			9			black current input
RO		85			83				44			8			Red output
GO		86			84				43			7			Green output
BO		87			85				42			6			Blue output

-23-