Daewoo DUA-3291GB, DUA-3270GB Service 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
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
3
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/SVH S1 : 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
RCA Jack(rear) SPDIF AUDIO OUT, AUDIO OUT(MONITOR OUT)
CI SLOT(rear) PCMCIA CARD
4
2. Block Diagram
1) Analog Part
5
Block Diagram
TD1316AL
(Digital tuner)
DRX- 3975D
(COFDM Demodulator)
I2C , AGC
IF
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
6
3. EEPROM Presetting DATA
Vert. Position -24 Virtual Dolby Option +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 Split 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
7
4. Service Remote Control (R-30SVC6)
* FACTORY REMOCON
NO. SYMBOL FUNCTION
1 POWE
R
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
T
CUSHION Adjust Decrease
13 AFT-L
UPPER CORNER Adjust Increase
SEARCH
9 NORMAL
NORMAL I/ NORMAL II/
FAVOURITE MODE
14 COR-T
UPPER CORNER Adjust Decrease
15 OP
T
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.
SEARCH
AV
TXT
AFT OPTAFT-
R-30SVC6
POWER
PR
VOL
MIN
svc
S-BRI
BRI
SCREEN
V-CEN V-SIZE
H-CENTER
R DRV
NORMAL
S.STOP
H/R
PR
VOL
MAX
CONT.
COLOR
SYMM BAL/AGC
H-WIDTH
G DRV B DRV S-CUR V-
R BIAS G BIAS
B BIAS
MM
M
M
M
MM
MMM
M
M
KK
K
KK
KK
KKKKK
PAR COR-T COR-B
TRAP/SYS
EX-FACTORY
8
5. 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.
9
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.
10
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)
Next
page
Replace
I801
Replace
this parts
Check
power cord
End
Abnormal
Normal
*
11
Trouble shooting Chats
Check
secondary voltage
Check
#2, #21, #24, #25, #43, #46, #65
#68~#70, #87 of I501
Check
#63~#64 of I501
Check
#71 of I504
Check #31~#32 of I501
Check #33 of I501
Check P902~P904
(B+, Micom_SDA/SCL,
UART_TX/RX, Boot Option)
Abnormal
B+
Abnormal
Micom_SDA/SCL
Abnormal
UART_TX/RX
Boot Option
Short to GND
Check/Replace
I506, I507 And
peripheral parts
Check/Replace
I100~I106, I200~I204,
I300~I301, TU300
Check/Replace
I301, TU300
Check/Replace
#6,#9 of I100, J077
And #61~#62 of I501
Check/Replace
#12 of JP01_2,
#41 of I100
And #26 of I201
*
12
2. No Picture(Raster OK)
Trouble Shooting Charts
(1)Analogue Mode
Check Signal
#16~#18 of I501
Check/Replace
SCL/SDA, 5V Line of Tuner
Check/Replace SF01
Check/Replace I501
Check/Replace ATT Cable
Check #6~#9 of I901
Check/Replace
Q502~Q504
And 5V Line
Check/Replace
Q902~Q904
And Voltage/Heater Line
Check/Replace
CRT Board
Loading...