DAEWOO ELECTRONICS DTT-3250 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 : TCP750FEF0
APR. 2006
CHSSIS MODEL
CP-750 DTT-3250
DTT-3250MT
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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
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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
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2.BLOCK DIAGRAM
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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
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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
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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.
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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
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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)
Next
page
Replace
I801
Replace
this parts
Check
power cord End
Abnormal
Normal
*
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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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TROUBLE-SHOOTING
2.No Picture(Raster OK)
External AV Mode
Check Signal
#165~#167 of IC501
Check/Replace
SCL/SDA, 5V Line of Tuner
Check/Replace SF01
Check/Replace I501
Check/Replace ATT Cable
Check #8 of I901~I903 Check/Replace
I901~I903
And Voltage/Heater Line
Check/Replace
CRT Board
Check
External Connection
Check Signal
#175~#184 of IC501
Check Signal
#165~#167 of IC501
Check
#8 of I901~I903
Check/Replace
I901~I903
Video, Heater voltage Line
Check/Replace
CRT Board
Check
External equipment
Check/Replace
IC501
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TROUBLE-SHOOTING
3.No Vertical Scanning
(One Horizontal Line Raster)
Check
DY Connector
Check
Input Voltage of I301
Check
Vertical Drive pulse(Vert )
#1~#7 of I301
Check/Replace
DY
Check/Replace
D403,D408
Check
#37~#38
of IC502
Check/Replace
B+, X-TAL, SCL, SDA
of IC502
Check/Replace
C516~C517,R527~R528,
R301~R306,R311~R313
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TROUBLE-SHOOTING
4.No Sound
Check
Mute or Volume Level
Check Speaker
And Connection
Check Audio_L/R
(#6,#12 of I601)
Check Sound B+
(#3, #16 of I601)
Check
#10 of I601
Check/Replace
Analog 4.4V, B+
Aound Mute Line
Check
#27~#28 of IC501
Check
#31 of IC501
Check/Replace
B+, SCL,SDA
of Tuner
Check/Replace
SF01
Check/Replace
I501
Check/Replace
5V, Check
external condition
Check
#9~#14
of IC501
RF(Analog) External(AV)
Check/Replace
D817
(Sound B+ Line)
Check/Replace
I602
Under 1V
Over 3V
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TROUBLE-SHOOTING
5.Remote Control Unit Trouble
Check
Battery of Remote Control
Check IR of Preamp
And Vcc of Preamp (IQ01)
Check/Replace
#89 of IC501
Replace Battery
Check/Replace
Preamp(IQ01)
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