Daewoo DTQ-29U1SCV User manual

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.

Service Manual

Color Television

S/M No : TCN400FNF0

JUNE. 2005

CHSSIS MODEL

CN-400FN DTQ-29U1SCV

DTQ-29U1SSFV

DTQ-29U1SCSV

DTQ-29U5SSFV

CN-401FN DTQ-29U4SCV

-1-

SAFETY PRECAUTIONS 2

SPECIFICATIONS 5

CIRCUIT BLOCK DIAGRAM 6

ALIGNMENT INSTRUCTIONS 7

YOUR REMOTE CONTROL 7

SERVICE MODE ADJUSTMENT 8

ASSEMBLY ADJUSTMENT 10

IC DESCRIPTION 14

UOC III SERIES 14

TDA8358J VERTICAL AMPLIFIER 19

TDA6107AJF 21

24WC16-16 KB EEPROM 22

LA42072N-E AUDIO AMPLIFIER 23

STR-W6735/56 24

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

TABLE OF CONTENTS

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

-6-

CIRCUIT BLOCK DIAGRAM

-8-

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

VWSELECT CBADJUST LEXIT

- 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)

-9-

ALIGNMENT INSTRUCTION

Table-B. CN-400FN(DTQ-29U1SCV) EEPROM DATA

MODE NAME VAL

REMARKS

MODE NAME VAL

REMARKS

S1 HEAT RUN RUN OFF SOC 0

OEC : 650V PWLDAC 0

RCA : 850V CL 10

S5 AGC LEVEL 22 CLD 0

IFOFF 37 GAM 1

QSS 1 HCT 0

BPB 1 ACL 0

FMI 1 BPS 1

AGN 0 CHSE 2

BPBS 1 FCO 0

DSG RF:0, AV:1 CBPS 1

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 43 B-GAIN 40

V.CENTER 42 R-BIAS 32

V.SLOPE 28 G-BIAS 32

V.LINEARITY 37 SRC R-BIAS 32

S_CORRECTION 32 SRC G-BIAS 32

H.CENTER 45 CVI R-BIAS -8

H.SIZE 54 CVI G-BIAS 10

H.PARALLEL 33 DP-Brightness 10

H-BOW 35 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

TCCON 1

TCI2X 0

PF 3

TFR 1

NRR 0

WS 3

BLS 0

DSK 0

AAS 2

BSD 0

BKS 1

DSA 0

RPO 3

RPA 2

BPD 0

S7-2

SCREEN ADJUSTS2

S7-1

-10-

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

-11-

ALIGNMENT INSTRUCTION

4-1). 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.

4-2). Vertical Position Adjustment

Select V.SLOPE item, adjust V.SLOPE data value to equalize half the screen with

center of the picture.

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.

Select V.LINEARITYitem, adjust V.LINEARITYdata value to proper vertical linearty.

-12-

ALIGNMENT INSTRUCTION

4-4). EAST / WEST Adjustment

Adjust the H.PARALLEL, H.SIZE, H-BOW, PARABOLA, EW TRAPEZ, CORNER TOP,

CORNER BOTTOM to compensate for geometrical distortion.

H.PARALLEL H.SIZE

PARABOLA CORNER TOP, CORNER BOTTOM

EW TRAPEZ

-13-

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 SRC R-BIAS 32

G-GAIN 32 SRC G-BIAS 32

B-GAIN 40 CVI R-BIAS -8

R-BIAS 32 CVI G-BIAS 10

G-BIAS 32

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-Bri

htnes

DP-Contrast 10

DP-Color 5

DP-Shar

nes

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"

SELECT ADJUST EXIT

-14-

IC DESCRIPTION

1-1. UOC III BLOCK DIAGRAM

1. UOC III RERIES

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