Daewoo DTT-3250MT 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

Color Television

S/M No : TCP750FEF0

APR. 2006

CHSSIS MODEL

CP-750

DTT-3250

DTT-3250MT

-2-

1. SPECIFICATION 3

2. BLOCK DIAGRAM 4

3. EEPROM PRESETTING DATA 5

4. ADJUSTMENT METHOD 7

5. TROUBLE-SHOOTING 9

6. SCHEMATIC DIAGRAM 15

7. PRINTED CIRCUIT BOARD 18

8. MECHANICAL EXPLODED DIAGRAM 24

9. PARTS LIST 25

CONTENTS

-3-

1.SPECIFICTION

MODEL DTT-3250

ITEM

POWER SOURCE AC 220/240V, 50Hz

POWER CONSUMPTION 155W

PICTURE TUBE 76cm

AUDIO OUTPUT 7W(L) + 7W(R), 8 (DTT-3250 )

10W(L) + 10W(R), 8 (DTT-3250MT)

H 711(BOX) / 595.5(SET)

DIMENSIONS(mm) W 1055(BOX) / 930(SET)

D 515(BOX) / 397(SET)

WEIGHT(kg) 63(GROSS) / 54.5(SET)

BAND I: CH2~CH4

VHF BAND II : CH5~CH12

RECEPTION CHANNEL CANLE BAND : S1’~S3’, S1~S20

HYPER BAND : S21~S41

UHF BAND IV, V : CH21~CH69

AERIAL(rear) VHF / UHF

SCART JACK(rear)

AV/1SVHS1: 21pin EURO JACK(AUDIO IN/OUT, VIDEO IN, Y IN, RGB IN, TV OUT)

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

-4-

2.BLOCK DIAGRAM

-5-

3. EEPROM PRESETTING DATA

CP-750 EEPROM PRESETTING DATA

SERVICE MODE I

I. Ver. Geometry(SD) II. Hor. Geometry(SD)

1. Ver. Center(SD) +22 1. Hor. Center(SD) +17

2. Ver. Size(SD) -222 2. POFS3(SD) -155

3. Ver. Lin(SD) +15 3. Hor. Width(SD) +81

4. Ver. S-Cor(SD) +96 4. Trapeze(SD) -8

5. VBST(SD) -6 5. Cushion(SD) -73

6. VBSO(SD) +26 6. Angle(SD) 0

7. LPFD(SD) +312 7. Bow(SD) +5

8. VSYNWIN(SD) +70 8. HBST(SD) +1180

9. VPROT(SD) Yes 9. HBSO(SD) +185

10. FLYBL(SD) +5 10. Corner Top(SD) +12

11. Ver. Zoom(SD) +256 11. Corner Bottom(SD) +18

12. Corner Top 6th(SD) 0

13. Corner Bottom 6th(SD) 0

III. Ver. Geometry(HD) IV. Hor. Geometry(HD)

1. Ver. Center(HD) +33 1. Hor. Center(HD) +34

2. Ver. Size(HD) -208 2. POFS3(HD) -155

3. Ver. Lin(HD) 0 3. Hor. Width(HD) +49

4. Ver. S-Cor(HD) +120 4. Trapeze(HD) -103

5. VBST(HD) -6 5. Cushion(HD) -143

6. VBSO(HD) +25 6. Angle(HD) +2

7. LPFD(SD) +625 7. Bow(HD) +9

8. VSYNWIN(HD) +127 8. HBST(HD) +1180

9. VPROT(HD) Yes 9. HBSO(HD) +180

10. FLYBL(HD) +5 10. Corner Top(HD) -36

11. Ver. Zoom(HD) +256 11. Corner Bottom(HD) +103

12. Corner Top 6th(HD) +66

13. Corner Bottom 6th(HD) -24

V. Ver. Geometry(COMP) VI. Hor. Geometry(COMP)

1. Ver. Pos(COMP) +33 1. POFS2(COMP) +34

2. Ver. Amp(COMP) -208 2. POFS3(HD) -155

3. Ver. Lin(COMP) 0 3. Pic. Width(COMP) +49

4. Ver. S-Cor(COMP) +120 4. Trapeze(COMP) -103

5. VBST(COMP) -6 5. Cush(COMP) -143

6. VBSO(COMP) +25 6. Angle(COMP) +2

7. LPFD(COMP) +625 7. Bow(COMP) +9

8. VSYNWIN(COMP) +127 8. HBST(COMP) +1180

9. VPROT(COMP) Yes 9. HBSO(COMP) +180

10. FLYBL(COMP) +5 10. CRNU(COMP) -36

11. Ver. Zoom(COMP) +256 11. CRNL(COMP) +103

12. CRNUS(COMP) +66

13. CRNIS(COMP) -24

-6-

EEPROM PRESETTING DATA

VII. Tube Measurement VIII. DDPC 3316_1

1. CUT_R +100 1. Brightness 0

2. CUT_G +100 2. Contrast +470

3. CUT_B +100 3. Sat for RGB2/YCbCr +16

4. WD_R +400 4. BCL Threshold +400

5. WD_G +400 5. BCL Gain +210

6. WD_B +400 6. PWL Maximum +300

7. CUT_DIS Yes 7. PWL Time Constant +255

8. CUT_GAIN +60 8. PIC_TC 0

9. IBRM +400 9. DC trasnport 0

10. WDR_DIS No 10. HDRV +30

11. WDR_GAIN 0 11. H safety protection No

12. WDRM +160 12. HSTOP 0

13. TML +17 13. Screen Bright -50

14. MADCLAT +300 14. Screen 0

VIIII. DDPC 3316_2 X. NTSC GEOMETRY

1. EHT Threshold +200 1. TRAPEZE(NTSC) +2

2. EHTH P1 0 2. CUSHION(NTSC) 0

3. EHTH SA1 -26 3. Corner Top(NTSC) 0

4. EHTV SA1 -60 4. Corner Bottom(NTSC) 0

5. EHTH P2 +7 5. Corner Top 6th(NTSC) 0

6. EHTH SA2 -10 6. Corner Bottom 6th(NTSC) 0

7. EHTV SA2 -30 7. Lpfd(NTSC) +213

8. EHT STC +20

9. EHT FTC +80

10. WDR SAT Yes

11. MAX WDR +496

SERVICE MODE 2

I. Additional Settings II. Options 1

1. DYNFOC_Vertical(PWMV) 0 1. TEXT TOP/FLOF

2. DYNFOC_HorStart(DFHB) 0 2. TUNER PHILIPS

3. DYNFOC_HorStop(DFHE) 0 3. CRT Option S/S CRT

4. OSD H_Shift +165

5. OSD H_Shift Split Screen +220

6. OSD V_Shift +43

7. OSD Pixel Clock +72

8. Caption Status Display No

9. XDS Data Display No

10. OSD Contrast +52

11. OSD Bright -70

III. Options 2 IV. Audio Options

1. Tuner Type T6002 1. Equalizer Yes

2. Show I2C_off No 2. Show Volume bar Yes

3. Show Versions of ICs 3. Autostore Volume No

4. DDP PWM Enable Yes 4. BBE No

5. PANORAMA No 5. Speech No

6. Film Mode PAL No 6. Volume Limit +63

7. Film Mode NTSC No

V. Deviation Settings VI. NVM Edit

1. M Japan +36 1. NVM_edit addr.(hex) ----

2. BTSC +36 2. NVM_edit data(hex) --

3. DK Dual +36

4. BG +36

5. NICAM L +36

6. NICAM I +36

7. DK NICAM +36 VII. Reset TV-set

8. FM Radio +36 1. Initialize NVM from ROM

-7-

4. ADJUSTMENT METHOD

THE ADJUSTMENT METHOD OF CP-750 WITH USER ROMOTE CONTROLLER(R-49C05)

To enter the service mode, press Red button and Green button and MENU key on Ch.91

Then, Service Mode 1 is displayed. If press MODE key, Service Mode 2 is displayed.

CONTROL KEY

MENU return to former step

OK exit service mode

PR / select item

VOL / change value or condition

SCREEN ADJUSTMENT

Service Mode 1 --> DDPC 3316_1 --> Screen

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

FOCUS ADJUSTMENT

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

and corner of screen.

Focus volume on the FBT is consist of two part - vertical focus and horizontal focus.

WHITE BALANCE ADJUSTMENT

(1) High-Beam Adjustment

Service Mode 1 --> Tube Measurement --> WD_R, WD_G

Adjust R,G bars in the high beam on the instrument may be located in the center.(B DRV is

Fixed.)

(2) Low-Beam Adjustment

Service Mode 1 --> Tube Measurement --> CUT_R, CUT_G

Adjust R,G bars in the low beam on the instrument may be located in the center.(B BIAS is

Fixed.)

The reference coordinates are X = 288, Y = 302”

VERTICAL CENTER Adjustment

Service Mode 1 --> Vertical Geometry --> Ver. Center

Adjust to harmonize RETMA pattern’s upper marking with Lower marking.

VERTICL SIZE Adjustment

Service Mode 1 --> Vertical Geometry --> Ver. Size

Adjust so that the Upper and the Lower ‘4’marks of the RETMA pattern may be located at

the boundaries of the screen.

HORIZONTAL CENTER Adjustment

Service Mode 1 --> Hor. Geometry --> Hor. Center

Adjust to harmonize the position of RETMA pattern’s Left side with Right side.

-8-

ADJUSTMENT METHOD

HORIZONTAL WIDTH Adjustment

Service Mode 1 --> Hor. Geometry --> Hor. Width

Adjust so that the Left and the Right ‘5’marks of the RETMA pattern may be located at the

boundaries of the screen.

PINCUSHION Adjustment

(1) Parabola Adjustment

Service Mode 1 --> Hor. Geometry --> Cushion

Adjust so that the Left and Right edge’s vertical line may be straight.

(2) Corner Top/Bottom or Top 6th/Bottom 6th

Service Mode 1 --> Hor. Geometry --> Corner Top/Corner Bottom or Corner Top 6th/Corner

Bottom 6th

Adjust so that the Upper and the Lower corner’s vertical line may be straight.

(3) Trapeze Adjustment

Service Mode 1 --> Hor. Geometry --> Trapeze

(4) Angle Adjustment

Service Mode 1 --> Hor. Geometry --> Angle

(5) Bow Adjustment

Service Mode 1 --> Hor. Geometry --> Bow

-9-

5. TROUBLE-SHOOTING

◆ First of all, check the short test of D402,D403 and D408

If short D402, change D402 and if short D403 or D408, repalce them with I301

Other cases

follow this sheet.

1. No Raster

Stand-By LED Check

Check R824

DC 3.3V

Check

Q802, Q803, I809

Check I802

Check #4 of I801

Check #1 of I801

(Switching)

Check #1 of I801

(DC 300V)

Check D801~D804

And D805~D806

Check/Replace F801

Check

Stand-By Circuit

Power On

check with

Remote controller

Check

Remote controller

And IR Circuit

Check/Replace Q802~Q803,

DP142 And peripheral parts

Replace I802

or Check/Replace D808

Check/Replace

R804, T801

Check

secondary

voltage

(Output voltage

of T801)

page

Replace

I801

Replace

this parts

Check

power cord End

Abnormal

Normal

-10-

TROUBLE-SHOOTING

Check

secondary voltage

Check D811~D817 of IC501

Check

#78~#79 of IC501,

#11~#12 of IC502

Check

#71 of I504

Check #5~#6 of I504

Check #33 of I501

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