Daewoo DUA-3291GB Manuale utente

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

Digital Television

CHASSIS :

Model :

CP-770

DUA-3291GB

DUA-3270GB

P/N : TCP770FEF0

JAN. 2006

TABLE OF CONTENTS

1. SPECIFICATION 3

2. BLOCK DIAGRAM 4

3. EEPROM PRESETTING DATA 6

4. SERVICE REMOTE CONTROL(R-30SVC6) 7

5. ADJUSTMENT METHOD 8

6. TROUBLE-SHOOTING 10

7. SCHAMETIC DIAGRAM 19

8. PRINTED CIRCUIT BOARD 24

9. MECHANICAL EXPLODED DIAGRAM 29

10. PART LIST 30

1. Specification

MODEL DUA-3291GB, DUA-3270GB

Power Source AC 220V ~ 240V, 50Hz

Power Consumption 120W

Picture Tube 76cm

Audio Output 7W(L) + 7W(R), 8

H 890

DIMENSIONS(mm) W 580

D 564

Weight(kg) 67

VHF BAND I : CH2 ~ CH4

BAND II : CH5 ~ CH12

Reception Channel CANLE BAND : S1’ ~ S3’, S1 ~ S20

HYPER BAND : S21 ~ S41

UHF BAND IV, V : CH21 ~ CH69

AERIAL VHF/UHF

SCART JACK(REAR)

AV1/SVHS1:21pinEUROJACK(AUDIOIN/OUT,VIDEOIN,YIN,RGBIN,TVOUT)

AV2 : 21pin EURO JACK(AUDIO IN/OUT, VIDEO IN, YC IN, MONITOR OUT)

RCA Jack(side) AV3/SVHS3 : AUDIO IN/OUT, VIDEO IN, S-VIDEO IN

RCA Jack(rear) SPDIF AUDIO OUT, AUDIO OUT(MONITOR OUT)

CI SLOT(rear) PCMCIA CARD

2. Block Diagram

1) Analog Part

Block Diagram

TD1316AL

(Digital tuner) DRX- 3975D

(COFDM Demodulator)

I2C , AGC

FE1DATA(0..7),

FE1CLK,

FE1START,

FE1VALID,

74ALVC164245

(Buffer)

PCMCIA

MDE9518

TS1

XC1_VCC5/3EN

TPS2211A

(power supply)

XCI1

Main

interface

Y/C,

R/L,

SPDIF,

UART,

Etc.

GuestBus

AMD29LV128

(FLASH) JTAGK4S561632C

(SDRAM) K4S561632C

(SDRAM)

I2c

MAX3241

(RS- 232 transceiver)

(3 Pin. con.)

Rx,Tx

Rx,Tx,Gnd

I2c

TCK,

TMS,

TS2

TS1 Input : Without CI

TS2 Input : With CI

When UART is connected

to PC serial,

It checks the condition of MDE.

When Analog Tuner is operating,

VCTi use the same I2C .

74ALVC164245

(Buffer)

74ALVC164245

(Buffer)

74ALVC164245

(Buffer)

2) Digital Part

3. EEPROM Presetting DATA

Vert. Position -24 Virtual Dolb

tion +8

Vert. Amplitude +206 Nicam Sensitivity -20

Vert. DVB offset -30 Prescale FM_AM 0

Vert. Zoom +230 Prescale NICAM +300

Vert. Linearity +40 Prescale SCART(AV) +430

Vert. S-Correction +75 Prescale DVB +255

Vert. Blanking Start +341 M Japan No

Vert. Blanking Stop +18 BTSC +16

Hor. Position (NEWLIN) +162 DK Dual +36

Hor. DVB offset 0 BG +90

Hor. RGB Pos.(POSF3) -29 NICAM L +70

Picture Width -52 NICAM I +70

Trapeze -56 DK NICAM +36

Cushion +185 SAT +36

Angle 0 FM Radion +36

Bow 0 Standard Select B

Hor. Blanking Start +1229 Top Setting +6

Hor. Blanking Stop +200 Video Peaking 0

Upper Corner -50 SIF Reference +2

Lower Corner +45 NVM-edit addr. (hex) ---

Upper Corner(Sixth) +20 NVM-edit data (hex) --

Lower Corner(Sixth) -40 PRESET TV-SET

Screen Red +150

Screen Green +150

Screen Blue +150

Cutoff Red 255

Cutoff Green 255

Cutoff Blue 255

Whitedrv. Red 300

Whitedrv. Green 300

Whitedrv. Blue 300

OSD H-Shift +178

OSD H-Shift S

lit Screen

+220

OSD V-Shift +35

OSD Pixel Clock +44

Tilt +45

ATS Delay Time(ms) 50

EHT-Thres +200

EHT-STC +70

EHT-SA1 -23

EHT-SA2 -34

EHT-DA1 +47

EHT-DA2 +33

EHT-DTC +8

EHT-DP1 -20

EHT-DP2 0

BCL Gain +300

BCL Threshold +430

BCL Minimum Con. +33

ADDITIONAL

SETTINGS

PICTURE

SETTINGS

TUBE

MEASUREMENT

AUDIO

SETTINGS

DEVIATION

SETTINGS

VERTICAL

GEOMETRY

HORIZENTAL

GEOMETRY

DRX

NVM EDIT

4. Service Remote Control (R-30SVC6)

* FACTORY REMOCON NO. SYMBOL FUNCTION

1 POWE

POWER ON/OFF

2 S. STOP

SERVICE BUS START/STOP

3 PR

¡ª PR UP(IN SVC MODE)

4 PR

¡PR DOWN(IN SVC MODE)

5 VOL MAX VOL MAX

6 VOL MIN VOL MIN

7 H/R

HEAT RUN

8 SVC SVC ON/OFF

10 EX-FACTORY

OUT GOING

11 AFT

CUSHION Adjust Increase

12 PAR

CUSHION Adjust Decrease

13 AFT-L

UPPER CORNER Adjust Increase

9 NORMAL NORMAL I/ NORMAL II/

FAVOURITE MODE

14 COR-T

UPPER CORNER Adjust Decrease

15 OP

LOWER CORNER Adjust Increase

16 COR-B

LOWER CORNER Adjust Decrease

17 S-BRI +

ANGLE Adjust Increase

18 S-BRI -

ANGLE Adjust Decrease

19 SYMM +

(RESERVED)

20 SYMM -

(RESERVED)

21 BAL/AGC

TRAPEZE Adjust Increase

22 TRAP/SYS

TRAPEZE Adjust Decrease

23 SEARCH

¡ª FUNCTION Search(PR UP)

24 SEARCH

¡FUNCTION Search(PR DOWN)

25 BRI

ANALOG/DIGITAL MODE

26 CONT.

TILT Adjust Increase

27 COLOR

TILT Adjust Decrease

28 AV

TV/AV MODE

29 TXT

TV/TELETEXT MODE

30 SCREEN

SCREEN Adjustment Mode

31 H-WIDTH -

H-WIDTH Adjust(NARROW)

32 H-WIDTH +

H-WIDTH Adjust(WIDE)

33 H-CENTER -

H-CENTER Shift LEFT

34 H-CENTER +

H-CENTER Shift RIGHT

35,6 R DRV +/-

R DRIVE Decrease/Increase

37,8 G DRV +/-

G DRIVE Decrease/Increase

39,0 B DRV +/-

B DRIVE Decrease/Increase

41,2 R BIAS +/-

R Cutoff Decrease/Increase

43,4 G BIAS +/-

G Cutoff Decrease/Increase

45,6 B BIAS +/-

B Cutoff Decrease/Increase

47 S-CUR +

S-CORRECTION Increase

48 S-CUR -

S-CORRECTION Decrease

49,0 V-SLOPE +/-

V-Linearity adjustment

* Remember that Some of the printed

51,2 V-CEN +/-

V-CENTER adjustment

Symbols differ from the function

53,4 V-SIZE +/-

V-SIZE adjustment

descripted.

TXT

AFT OPTAFT-

R-30SVC6

POWER

VOL

MIN

svc

S-BRI

BRI

SCREEN

V-CEN V-SIZE

H-CENTER

R DRV

NORMAL

S.STOP

H/R

VOL

MAX

CONT. COLOR

SYMM BAL/AGC

H-WIDTH

G DRV B DRV S-CUR V-

R BIAS G BIAS B BIAS

MMMMM

KKKK

KKKKK

PAR COR-T COR-B

TRAP/SYS

EX-FACTORY

. Adjustment Method

“** This Adjustments should be done by using SVC Remote Controller “”R-30SVC6”””

MICOM PROGRAMMING

-Micom should be programmed by using PC with operation tests.

-The specific s/w and adapter are needed for micom programing.

SCREEN Adjustment

(1) Press the SVC key of the SVC remote controller ( R-30SVC6)

(2) Adjust Screen Volume of FBT until the horizontal line is just disappeared.

(3) Press the Screen key on the SVC remote controller to release Screen mode.

FOCUS Adjustment

-Adjust with the Focus volume on the FBT until you get the most clear resolution of 350

line and corner of screen.

WHITE BALANCE Adjustment

(1) Measuring instrument settings

-The others are same with other chassis

-NITSUKI have to be set exactly to Reference G, CHROMA : OFF

-The Reference coordinates : HIGH ( x : 288, y : 301, Y : 100cd/m2)

LOW ( x : 288, y : 301, Y : 15cd/m2)

(2) High-Beam Adjustment

-Adjust with R DRV +/-, B DRV +/- keys so that only R,B bars in the high beam on the

instrument may be located in the center. (“G”DRIVE is Fixed.)

(3) Low-Beam Adjustment

-Adjust with R BIAS +/-, B BIAS +/- keys so that only R,B bars in the low beam on the

instrument may be located in the center. (“G”DRIVE is Fixed.)

VERTICAL CENTER Adjustment

-Pattern : RETMA

-Adjust with V-CEN +/- keys to harmonize pattern’s upper marking with Lower marking.

(ex) “2/2”or “3/3”or “1/1”

VERTICAL SIZE Adjustment

-Pattern : RETMA

-Adjust with V-SIZE +/- keys so that the upper and the lower ‘3’marks of the RETMA

pattern may be located at the boundaries of the screen.

Horizontal Center Adjustment

-Pattern : RETMA

-Adjust with H-CENTER +/- keys to harmonize the position of pattern’s Left side with

Right side.

Alignment Instruction

Horizontal Width Adjustment

-Pattern : RETMA

-Adjust with H-WIDTH +/- keys so that the Left and the Right ‘3’marks of the RETMA

pattern may be located at the boundaries of the screen.

PINCUSHION(E/W) Adjustment

( Pattern : PAL CROSS HATCH )

(1) Parabola Adjustment

-Adjust with AFT/PART keys so that the Left and Right Edge’s Vertical Line may be

straight .

(2) CORNER TOP/BOTTOM Adjustment

-Adjust with AFT-L/COR-T/OPT/COR-B so that the upper and lower corner’s vertical

line may be straight.

Key Description

AFT-L/COR-T Upper Corner Adjust +/-

OPT/COR-B Lower Corner Adjust +/-

(3) EW TRAPEZ Adjustment

-Adjust with BAL/AGC/TRAP/SYS so that the vertical line may be straight.

Key Description

BAL/AGC Trapez Increase

TRAP/SYS Trapez Decrease

(4) ANGLE/BOW Adjustment

-ANGLE/BOW are adjusted automatically.

SHIPPING KEY IN

If product has no problems, Press the EX-FACTORY key on the SVC Remote Control

to set the Shipping conditions then turn off the set.

1. No Raster

6. Trouble Shooting

Stand-By LED Check

Check R817

DC 3.3V

Check

Q809, Q810, I806

Check I804

Check #4 of I801

Check #1 of I801

(Switching)

Check #1 of I801

(DC 300V)

Check D801~D804

And D809~D810, LF802

Check/Replace F801

Check

Stand-By Circuit

Power On

check with

Remote controller

Check

Remote controller

And IR Circuit

Check/Replace Q809~Q810,

DP142 And peripheral parts

Replace I804

or Check/Replace D807

Check/Replace

R805, T801

Check

secondary

voltage

(Output voltage

of T801)

page

Replace

I801

Replace

this parts

Check

power cord End

Abnormal

Normal

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