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

ITEMS
TV Standard

Power Input
Power Consumption

Tuning ranges

Sound Output
Speaker
Antenna Input Impedance

Auxiliary Input Terminal

Auxiliary Output Terminal

Intermediate Frequencies

Remote Control

Special Function

DTQ-27U8SC

NTSC-M

AC 120V 60Hz

Frequency Synthesizer(FS)Tuning System
TV VHF(L):CH2-CH6

UHF(H):CH7-CH13
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

5W+5W

8ohm 12W

75ohm Unbalanced
Front: Video, Audio(L,R)
Rear: Video, Audio(L,R)
Component Video, Audio(L,R)
REAR: Video, Audio(L,R)
Picture IF Carrier Frequency : 45.75MHz
Sound IF Carrier Frequency : 41.25MHz
Color Sub-Carrier Frequency : 42.17MHz

1) Icon Type 7) Surround

2) 3-Language OSD 8) AVC

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

DTQ-29U8SS

AC 120V 50/60Hz

125W

7W+7W

8ohm 12W

2EA

R-43A07

DTQ-29U8SSP

AC 220V 50/60Hz

7W+7W

8ohm 12W 2EA

DAEWOO ELECTRONICS CO., LTD

http://svc.dwe.co.kr Apr. 2002

1

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

2

SPECIFICATIONS

MODEL

ITEMS
TV Standard

Power Input
Power Consumption

Tuning ranges

Sound Output
Speaker
Antennena Input Impedance

Auxiliary Input Terminal

Auxiliary Output Terminal

Intermediate Frequencies

Remote Control

Special Function

DTQ-27U8SC

NTSC-M

AC 120V 60Hz

Frequency Synthesizer(FS)Tuning System
TV VHF(L):CH2-CH6

UHF(H):CH7-CH13
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

5W+5W

8ohm 12W

75ohm Unbalanced
Front: Video, Audio(L,R)
Rear: Video, Audio(L,R)
Component Video, Audio(L,R)
REAR: Video, Audio(L,R)
Picture IF Carrier Frequency : 45.75MHz
Sound IF Carrier Frequency : 41.25MHz
Color Sub-Carrier Frequency : 42.17MHz

1) Icon Type 7) Surround

2) 3-Language OSD 8) AVC

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

DTQ-29U8SS

AC 120V 50/60Hz

125W

7W+7W

8ohm 12W

2EA

R-43A07

DTQ-29U8SSP

AC 220V 50/60Hz

7W+7W

8ohm 12W

2EA

3

CIRCUIT BLOCK DIAGRAM

CN-793N BLOCK DIAGRAM

CVI A/V IN 1 A/V IN 2 MONITOR OUT

Y Cb L R L-OUT

R-OUT

Cr

CONTROL

CRT : A68X

9V

I501,I502,I601,TU01

TV ON SW

OSD RGB

I504

DTQ-27(29)U8SC
DTQ-29U8SS

AC120V

I601

DTQ-29U8SSP

AC220V

TU01 TUNER

DT5-NF20F

I701

u -COM IC

DW86324DV

-XXX

SCL
SDA

x-ray

I501

MAIN IC
TB1251N

SCL
SDA

RGB

VIDEO S/W IC I504
MM1118

COMB
FILTER
TDA9183
P

I502

SOUND IC I601
MSP3420G

SCL SDA

210V screen focus HV

FBT T402
FFA94048L

HEATER

I801

POWER IC
STR-F6626 (AC120V)
STR-F6654 (AC220V)

EEPROM

I702

IR

SW702
~SW707

SAW
FILTER

I901

VIDEO

AMP

TEA5101B

12.5V

27V

SOUND
AMP
TDA8946J

I602

Q501
IF DET
OUT BUFF

TRAP

BPF

5V

9V

7805

X-RAY

SMPS TRANS
TSM-5345B1

PC817C SE130N

13.5V

9V

5V

ANT

33V

VERTICAL &
PINCUSHION

TA8427K I301

HOR.

OUTPUT

2SD2578 Q402

DEFLECTION YOKE

OCP

13.5V 11V

5V

RGB

CONTROL

8.2V 5V

45V

132V

27V

7809

BUFF

33V

7805

8.2V

4

ALIGNMENT INSTRUCTIONS

1

3
4

11

8
7

2

4
5

3

9

10

6

POWERMUTE

MENU

CH

SLEEP PREVIOUS

VIDEOINPUTDISPLAY

123

456

7809

VOL VOL

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.

Your Remote Control(R-43A05)

5

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.

• 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.

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

PART

REPLACED

I701

(U-COM)

I101

(MAIN)

I702

(EEPROM)

CRT

ADJUSTMENT

NECESSARY UNNECESSARY

O

O

O

O

NOTES

Data is stored in I703.

Initial setting values are written from I701.
ADJUSTING ITEMS

S5 : RFAGCD
S6 : H.CENTER/V.CENTER/V.SIZE
S8 : GD/BD/RB/GB/BB
S9 : DP-brightness

Adjust items related to picture tube only.(White Balance adjustment)

6

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

Table-B

ALIGNMENT INSTRUCTIONS

*Indicates the items with different settings each of sets.

7

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.

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.

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

CAUTION

• 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.

AT
RF

AGC

AFT

OVR

Q/DT

VCO

RAGC
AGCD

PNT
SEN

MSW

GN

CTR

STR

27

3.75

100K

0
0
0

VCO
VCO

CARRIER

BUZ
FM/AM
SCART

MOTR

REQ

STP

RED

CAL

SCAL

VOL

0
0
0

0
16
15

127

H-CENTER
H-SIZE
P-CUSHION
V-CENTER
V-SIZE
V-LIN
EW-TRAPEZ

14
54
18

4

41

9

14

V-S
V-RAMP
V-EHT
EW-CORNER
H-EHT

8

1

7

8

7

MOVE ADJUST RECALL : SET

MOVE ADJUST RECALL : SET

8

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.

• 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.

ALIGNMENT INSTRUCTIONS

GD
BD

RB
GB
BB

61
74

127
160
138

MOVE ADJUST RECALL : SET

9

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.

• 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”

DP-BRIGHT
DP-CONTRAST
DP-SHARPNESS
DP-COLOR
DP-TINT
CbCr CDR
CbCr TINT

SUB CONT 557
15
38
15
40
15

3

MOVE ADJUST RECALL : SET

10

SCHEMATIC DIAGRAM

11

LOC PART CODE PART NAME PART DESCRIPTION REMARK

ZZ100 48B4343A07 TRANSMITTER REMOCON R-43A07 (AA)
ZZ110 PTACPWJ936 ACCESSORY AS DTQ-29U8FC
0030 4850Q00810 BATTERY R6P/LN
0040 48586793E1 MANUAL INSTRUCTION ENGLISH
M821 4858213800 BAG INSTRUCTION L.D.P.E T0.05X250X400
ZZ120 PTBCSHJ936 COVER BACK AS DTQ-29U8FC
M211 4852160400 COVER BACK FR HIPS GY 29U8
M591 4855936700 DECO AV PVC T0.25
M781 4857817630 CLOTH BLACK FELT 400X20X0.7
M782 4857817612 CLOTH BLACK FELT 250X20X0.7
ZZ130 PTPKCPJ904 PACKING AS DTQ-29U8
10 6520010100 STAPLE PIN AUTO W65
M681 4856812400 BAND PP AUTO T1.1XW17mmXL770M
M801 4858059700 BOX CARTON DW-3 29U8
M811 4858198100 PAD EPS 29U8
M821 4858215600 BAG P.E PE FOAM t0.5x1600x1270
ZZ131 58G0000143 COIL DEGAUSSING DC-29S1
ZZ132 48519A4210 CRT GROUND NET 2901H-1015-2P
ZZ140 PTCACAJ948 CABINET AS DTQ-29U8SC
M201A 4856015821 SCREW CRT FIX SWRM+SK5 L=35
M201B 4856215402 WASHER RUBBER CR T2.0
M201E 4856816300 CLAMP WIRE NYLON 6 (V0)
M211A 7172401612 SCREW TAPPTITE TT2 TRS 4X16 MFZN BK
M211B 7172401612 SCREW TAPPTITE TT2 TRS 4X16 MFZN BK
M211C 7178301212 SCREW TAPPTITE TT2 WAS 3X12 MFZN BK
M541 4855419800 SPEC PLATE ART 150
M686 4856812001 TIE CABLE NYLON66 DA100
V901 4859635261 CRT A68QDL280X011(B) P45
ZZ200 PTFMSJJ936 MASK FRONT AS DTQ-29U8FC
M191 4851944701 DOOR AS 2823101+5544901 29U8
M201 4852078800 MASK FRONT FR HIPS GY 29U8
M481 4854860900 BUTTON POWER FR ABS GY 29U8
M481A 4856716000 SPRING SWPA PIE0.5
M491 4854950400 BUTTON CH FR ABS GY 29U8
M491A 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN
M501 4855060301 DECO CTRL PVC T0.25
M561 48556174SD MARK BRAND SILVER DIA-CUTTING
M592 4855936301 DECO EYE ABS BLUE
M592A 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN
M791 4857923300 DOOR LOCK LA701(KIFCO)
ZZ202 PTSPPWJ904 SPEAKER AS DTQ-29U8
PA601 4850704S32 CONNECTOR YH025-04+YRT205+ULW900500

SP01 4858315210 SPEAKER SP-78128F02
SP01A 7172401212 SCREW TAPPTITE TT2 TRS 4X12 MFZNBK
SP02 4858315210 SPEAKER SP-78128F02
SP02A 7172401212 SCREW TAPPTITE TT2 TRS 4X12 MFZNBK
ZZ290 PTMPMSJ936 PCB MAIN MANUAL AS DTQ-29U8FC
10 2193102005 SOLDER BAR SN:PB=63:47 S63S-1320
30 2291050616 FLUX SOLDER JS-64T3
40 2291050301 FLUX SOLVENT IM-1000
C308 CEYF1E332V C ELECTRO 25V RSS 3300MF (16X31.5)
C401 CEYD1H689V C ELECTRO 50V RUB 6.8MF (16*35.5)
C405 CMYH3D722J C MYLAR 2KV BUP 7200PF J
C406 CMYH3D752J C MYLAR 2KV BUP 7500PF J
C407 CMYE2J273J C MYLAR 630V PU 0.027MF J
C416 CMYE2G364J C MYLAR 400V PU 0.36MF J
C802 CL1UC3104M C LINE ACROSS WORLD AC250V 0.1UF M R.47
C803 CL1UC3104M C LINE ACROSS WORLD AC250V 0.1UF M R.47
C804 CEYD2D681D C ELECTRO 200V FHS 680MF (25X40)
C809 CH1BFE472M C CERA AC AC400V 4700PF M U/C/V
C813 CEYN2D221T C ELECTRO 200V FWS 220MF (22X30)
C821 CEYF1E332V C ELECTRO 25V RSS 3300MF (16X31.5)
C824 CBYB3D152K C CERA SEMI 2KV BL(N) 1500PF K
C831 CEYF1E332V C ELECTRO 25V RSS 3300MF (16X31.5)
C888 CH1BFE472M C CERA AC AC400V 4700PF M U/C/V
D402 DRGP30J—- DIODE RGP30J
D431 DDG3——— DIODE DG3
D801 PTC1SW8902 HEAT SINK ASS`Y DPBS606GU- + 7174300811
D801 DPBS606GU- DIODE BRIDGE PBS606G
D801A 4857018902 HEAT SINK A1050P-H24
D801B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
D810 PTS2SW6900 HEAT SINK ASS`Y DFMLG16S— + 7128301011
00001 DFMLG16S— DIODE FML-G16S
0000A 4857026900 HEAT SINK AL EX
0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
D815 DRGP30J—- DIODE RGP30J
DF01 DLH2PR—— LED BLOCK LH-2P-R
F801 5F1GB6321L FUSE GLASS TUBE UL/CSA TL 6.3A 125V MF51
I301 PTB2SW7904 HEAT SINK ASS`Y 1TA8427K— + 7174300811
I301 1TA8427K— IC TA8427K
I301A 4857027904 HEAT SINK AL EX (AN0DIZE)
I301B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
I409 1KA7809—- IC REGULATOR KA7809
I501 1TB1251N— IC TB1251CN

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

” is a recommendable part for essential stock.

CAUTION

ELECTRICAL PARTS LIST

LOC PART CODE PART NAME PART DESCRIPTION REMARK