Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo Plasma SP-120 chassis DAEWOO SP120 CHASSIS DSP5012LXE PLASMA TV Service Manual
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S/M NO. : TSP120BEF2
50" PLASMA PDP MONITOR
CHASSIS : SP-120
MODEL : DSP-5012LXS
Jan. 2004
Contents
A. Parts with the exception of MODULE
1. Safety Precautions 3
2. Product Specification
2-1. SPECIFICATION 4
2-2. Available Input Signal 6
3. BLOCK DIAGRAM 8
4. Description Of Each BLOCK
4-1. A/V BLOCK 9
4-1-1. A/V BLOCK DIAGRAM 9
4-1-2. VIDEO PCB 10
4-1-3. JACK PCB 14
4-1-4. KEY PCB 15
4-1-5. LED PCB 15
4-2. POWER PCB 16
5. SERVICE MODE
5-1. Entering SERVICE MODE 18
5-2. Check initial data of Video PCB 18
5-3. Description Of SERVICE MODE Items 19
6. Adjusting Method
6-1. Adjusting WHITE BALANCE 23
6-2. Adjusting POWER PCB 23
7. SOFTWARE UPGRADE Method 26
8. Main PCB Trouble Diagnosis 29
8-1. VIDEO & JACK PCB Trouble Diagnosis 29
8-2. POWER PCB Trouble Diagnosis 34
9. TROUBLE SHOOTING
9-1. Facts You Must Know When Diagnosing And Repairing 35
9-2. Representative Symptoms When Each PCB Breaks Down 35
9-3. Trouble Diagnosis And Repairing Method For Representative Symptoms 36
10. ASSEMBLY LIST 40
11. EXPLODED VIEW 41
-1-
B. Parts of MODULE
1. Safety Precautions 2
2. Formation and Specification of Module 5
3. Adjustment 6
4. Trouble Shooting 9
5. Block Diagram 14
-2-
A. Parts with the exception of MODULE
1. Safety Precautions
1. Safety Precautions
(1) When moving or laying down a PDP Set, at least two people must work. Avoid any impact towards
the PDP Set.
(2) Do not leave the broken PDP Set on for a long time. To prevent any further damages, after check the
condition of the broken Set, make sure to turn the power (AC) off.
(3) When opening the BACK COVER, turn off the power (AC) to prevent electric shock. When a PDP
is on, high voltage and high current exist inside the Set.
(4) When loosening screws, check the connecting position and type of the screw. Sort out the screws
and store them separately. Because screws holding PCB are working as electric circuit
GROUNDING, make sure to check if any screw is missing when assembling.
(5) If you open the BACK COVER, you will see a
Panel Gas Exhaust Tube (Fig. 1). If this part is
damaged, entire PDP PANEL must be replaced.
Therefore, when working, be careful not to
damage this part.
Fig 1. Panel Gas Exhaust Tube
(6) A PDP Set contains a different kind of connector cables. When connecting or disconnecting
connector cables, check the direction and position of the cable beforehand.
(7) When disconnecting connectors, unplug the connectors slowly with care. Especially when
connecting/disconnecting FFC (film) cables or FPC cables, do not unplug the connectors too much
instantaneously or strongly, and always handle the cables with care.
(8) Connectors are designed so that if the number of pins or the direction does not match, connectors
will not fit. When having problem in plugging the connectors, make sure to check their kind,
position, and direction.
-3-
2. Product Specification
2-1. SPECIFICATION
ITEM SPECIFICATION REMARK
1. GENERAL
1-1. MODEL NO DSP-5012LXS
1-2. CHASSIS NO SP-120
1-3. SCREEN SIZE 50"(16:9)
1-4. COUNTRY Europe
1-5. RESOLUTION 1,366(H) X 768(V)
1-6. REMOCON TYPE R-V28A(E)
1-7. SAFETY STANDARD CE(CLASS B), CB
2. MECHANICAL
2-1. APPEARANCE
1) WITHOUT STAND WxHxD=1,222 x 738 x 93.8 mm
2) WITH STAND WxHxD=1,222 x 842 x 408 mm
2-2. WEIGHT
1) WITHOUT STAND 48 Kg
2) WITH STAND 55 Kg
3. ELECTRICAL
3-1. VIDEO INPUT COMPOSITE (NTSC, PAL, SECAM, PAL-M/N, NTSC4.43)
& S-VHS (50/60Hz Y/C) 1 PORTS SCART(CVBS/RGB) 2ports
3-2. DTV/DVD INPUT 1080i, 720P, 480P , 480i
(Y, Pb/Cb, Pr/Cr, COMPONENT SIGNAL) 2ports
3-3. PC INPUT VGA ~ UXGA (15 PIN D-SUB) 1 PORT
3-4. DVI INPUT DVI-D Input(DVI JACK) 1 port
3-5. SOUND INPUT VIDEO 3ports, DTV/DVD 2 ports,PC 1 port,DVI 1 port
3-6. SPEAKER OUTPUT 8W(R) + 8W(L)
3-7. POWER REQUIREMENT AC 100V~240V, 50/60Hz
3-8. POWER CONSUMPTION 550W
3-9. RS-232 CONTROL RS-232 COMMUNICATION (EXTERNAL UPGRADE)
3-10. FUNCTION
1) SCALING *PC: H/V SIZE AND POSITION ADJUSTMENT
*VIDEO : AUTO, 16:9, PANORAMA, ENLARGE LB, ENLARGE LBS
*DTV/DVD : AUTO,16:9
2) ZOOM 20 STEP ZOOM
3) OSD 11 LANGUAGES (ENGLISH, KOREAN, GERMAN, ITALIAN,
DUTCH, PORTUGUESE, SPANISH, MEXICAN, RUSSIAN,
CHINESE, FRANCH)
4) OTHERS STILL, SLEEP MODE , SOUND MODE
-4-
Product Specification
ITEM SPECIFICATION REMARK
4. OPTICAL
4-1. SCREEN SIZE 50"(127Cm) DIAGONAL
4-2. ASPECT RATIO 16:9
4-3. NUMBER OF PIXELS 1,366(H)X768(V)
4-4. DISPLAY COLOR 1,677 COLOR( EACH 8BITS FOR RGB )
4-5. CELL PITCH 0.28(H)X0.81(V) Standard for green cell
4-6. PEAK LUMINANCE 360cd/m2(With filter glass)
4-7. CONTRAST RATIO 1000:1(Dark Room)
4-8. VIEWING ANGLE 160(VERTICAL/HORIZONTAL)
5. USERCONTROL & ACCESSORIES
5-1 CONTROL BUTTON(SET) AC POWER BUTTON(PUSH-PULL S/W)
MENU, SELECT, UP, DOWN, LEFT, RIGHT(SOFT S/W)
5-2. REMOTE CONTROL POWER, INPUT SELECT, CONFIRM (or OK),
( R-V28A(E) ) EXTENSION -, EXTENSION +, MENU, UP, DOWN,
VOLUME UP, VOLUME DOWN, SILENCE, PICTURE
MODE, PICTURE STILL, PICTURE SIZE, SOUND
MODE, TIMER SLEEP
5-3. ACCESSORIES REMOTE CONTROLLER,BATTERY,INSTRUCTION MANUAL,
A/V CABLE, PC CABLE, POWER CORD
OPTION : STAND WALL HANGER, SPEAKER R/L
-5-
Product Specification
2-2. Available Input Signal
(1) PC
Resolution H Freq. (KHz) V Freq. (Hz) Remark Patt No.
640x350 31.469 70.1 IBM 203
37.861 85.1 VESA 11
640x400 24.823 56.4 NEC 15
30.48 60.0 PGA 871
31.469 70.1 IBM (DOS) 204
37.861 85.1 VESA 16
640x480 31.469 59.9 DOS 17
35 66.7 Macintosh 18
37.861 72.8 VESA 19
37.5 75.0 VESA 20
39.375 75.0 IBM 21
43.269 85.0 VESA 22
720x400 31.47 60.0 VGA 876
31.469 70.1 IBM 13
37.927 85.1 VESA 14
720X480 31.54 60.0 480P 953
720X576 15.63 25.0 PAL 950
800x600 35.156 56.3 VESA 23
35.16 57.2 VESA 24
37.879 60.3 VESA 24
48.077 72.2 VESA 25
46.875 75.0 VESA 26
53.674 85.1 VESA 27
832x624 49.726 74.0 Macintosh 28
1024x768 48.193(48.077) 59.3(59.8) Macintosh(OAK) 29
48.363 60.0 VESA 30
53.95 66.1 XGA 890
56.476 70.1 HP&VESA 31
60.241 74.9(74.6) Macintosh 32
60.023 75.0 VESA 33
68.677 85.0 VESA 34
80.66 100.0 Fujitsu 939
70.84 84.0 SUN 926
1152X864 54 60.0 VAX 936
63.851 70.0 VESA 35
67.5 75.0 VESA 36
77.094 85.0 VESA 37
1152x900 61.796 66.0 SUN 38
71.713 76.0 SUN 39
1280X720 45 60.0 720P 954
1280X960 60 60.0 VESA 40
75 75.0 VESA 41
85.938 85.0 VESA 42
-6-
Product Specification
Resolution H Freq. (KHz) V Freq. (Hz) Remark Patt No.
1280X1024 46.433 43.4 VESA 205
63.981 60.0 VESA 44
70.66 66.5 VAX 937
74.88 70.0 NEC 921
78.125 72.0 HP & HITA 206
78.855 74.1 Sony & NEC 46
79.976 75.0 VESA 47
81.13 76.1 SUN 927
91.146 85.0 VESA 48
1600X1200 62.5 48.0 VESA
75 60.0 VESA 50
81.25 65.0 VESA 862
87.5 70.0 VESA 863
93.75 75.0 VESA 864
100 80.0 VESA 865
(2) DTV
-1080i/ 60 Hz
-720P / 60 Hz
-480P / 60 Hz
(3) VIDEO
-PAL, PAL-M, PAL-N
-NTSC , NTSC4.43
- SECAM
-7-
3. BLOCK DIAGRAM
-8-
4. Description Of Each BLOCK
4-1. A/V BLOCK
4-1-1. A/V BLOCK DIAGRAM
8
7
1
1
6
5
4
3
2
5
4
3
2
GND
E33V
GND
DATA2
DATA1
COLUM3
COLUM2
COLUM1
STB5V
GND
LED_P
IR
GND
P601 P602
P603
1 RA1- GND
2 RA1+ DEN
RB1-
RB+ S_RESET
GND VVS
RC-
RC+ V_MUTE
RCLK1+ RCLK1- DVS IC600 IC406
RD1+ RD1-
GND DHS PW171 DPTV-MVS VHS
RD2-
RA2+ RA2-
RB2+ RB2-
to RC2- GND VPEN1
RCLK2- RC2+
DIGITAL RD2- RCLK2+ VPEN
GND RD2+
GBLKSLP GPEN GSOG
SDATA DISPEN
39 SLE SCLK DECOE
40 GND GHSFOUT GCOAST GREF
DCLKB IC401
PA5 SAA7118
5 STB5V
4 GND
GCLK IC500
3 CCOMB
CXA3516
to PWR 2 POWER_CLT
GHS
YCOMB
1 LED_P
GVS
PA4 IC400
10 STB5V u64083
9 LED_P
8 GND
7 GND VIN
G/Y_DTV
6 P5V
Y_DVD
R/PR
B/PB
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GPC
HPC
RPC
VPC
BPC
5 GND
CO
CR
YO
CB
4 GND
to PWR
MSP_RST
S_MUTE
to PWR
FB_SC
3
G_SC
P12V
R_SC
B_SC
P12V
P12V
SEL1
SEL2
SEL3
GND
GND
GND
GND
GND
GND
GND
GND
GND
RXD
SDA
TXD
SCL
VIN
2 P12V
P502
NUL 1 25
1
26 50
26 50 1 2 3 4
JACK 1 25
PA6
PCB PA502
R_OUT RIGHT
L_OUT LEFT
IC702 IC701
IC706 IC704 IC700 TDA7480 TDA7480
CXA2151 CXA2069 MSP3420
1 2 3 4 5 6 7 8
1 2 3 4 5 6
PA601
KEY PCB
LED PA602
-9-
Description Of Each BLOCK
4-1-2.VIDEO PCB
- PROCESS Various Signal (PC, COMPONENT, COMPOSITE ) to produce 24BIT DIGITAL
output
(1) IC and TP
(1) IC400(UPD64083)
-Using 3D COMBFILTER to separate COMPOSITE signal to Brightness
Signal(Y) and Color Signal(C)
*TP ( Input : COLOR BAR PATTERN )
A. YCOMP : Brightness Signal(Y)
B. CCOMP : Color Signal (C)
(2) IC401 (SAA7118E)
-Receive NTSC, SECAM and PAL VIDEO by COMPOSITE(V) , S-VHS(Y.C)
COMPONENT (Y Cb Cr) and process signal
*TP
A. DECOE : CHIP ENABLE part. When signal process is done by IC401, DC 3.3V is
measured.
-10-
Description Of Each BLOCK
(3) IC406(DPTV-MVS)
-A Scan Rate Converter which converts Interlace signal into Progressive signal
*TP
A. VVS : VERTICAL SYNC (output of DPTV-MVS)
B. VHS : HORIZONTAL SYNC (output of DPTV-MVS)
C. VCLK : CLOCK (output of DPTV-MVS)
-11-
Description Of Each BLOCK
(4) IC500(CXA3516R)
-3-channel 8-bit 165MSPS A/D converter which process PC , DTV signal
* TP
A. GCOAST : COAST CONTOL Signal for PLL (input of CXA3516)
B .GHS : HORIZONTAL SYNC for GRAPHIC (output of CXA3516)
C. GCLK : CLOCK for GRAPHIC (output of CXA3516)
-12-
Description Of Each BLOCK
D. GFBK : SYNC for PLL
(5) IC600(PW171)
- Image processor IC
*TP
A. DEN : DATA ENABLE (output of PW171)
B. DHS : HORIZONTAL SYNC (output of PW171)
-13-
Description Of Each BLOCK
C.DVS : VERTICAL SYNC for DISPLAY (output of PW171)
D. DCLKB : CLOCK for DISPLAY (output of PW171)
4-1-3. JACK PCB
- Separate and process various VIDEO and AUDIO signal
(1) IC706 (VIDEO /SYNC SELECTOR)
- This chooses Y Cb/Pb Cr/Pr or RGB signal to output Y Cb/Pb Cr/Pr, to separate SYNC,
and to perform SYNC COUNTER.
(2) IC704 (AUDIO/VIDEO SWITCH)
- The IC perform AUDIO or VIDEO SWITCHING
(3) IC715 (DIGITAL CONTROLLER)
- DVI CONTROLLER
(4) IC721 (INPUT SELECTOR SWITCH)
- SCART (RGB) SELECTOR SWITCH
(5) IC700 (MULTI STANDARD SOUND PROCDSSOR)
- AUDIO SINGNAL VOLUME control, EQUALIZER control
-14-
Description Of Each BLOCK
*TP
R_OUT(L_OUT) : AUDIO SIGNAL that goes into MSP3420 before AUDIO
PROCESSING
(4) IC701 .IC700 (TDA 7480)
*TP
A. RIGHT(LEFT) :AMP input signal before 30dB amplification
4-1-4.KEY PCB
- Input PCB using KEY
4-1-5.LED PCB
- PCB for REMOCON CONTROL
-15-
Description Of Each BLOCK
4-2. POWER PCB
1. Input Specification
1.1 Input condition
Standard Voltage Range AC 100V ~ 240V
Available Voltage Range AC 85V ~ 276V
Frequency Range 50Hz ~ 60Hz ( 10%)
1.2 Others
Item Specification Test Condition
Efficiency 85% Min AC 220V
At Full Load
Inrush Current 40A peak-peak AC 85V ~ 276V
2. Environment condition
2.1 Ambient temperature and humidity
Storage temperature -20 ~ 60
Operation temperature -10 ~ 50 (AMBIENT)
On/Off test temperature -20 ~ 60
Storage humidity 10% ~ 90%
Operation humidity 10% ~ 90%
3. Output Specification
3.1 Output Voltage & Load Condition
No. Output Output Variable Voltage Output 2)*3Ripple &
Name Typical Voltage Tolerance Current(A) Noise (Vp-p)
(V) Range(V) (%) Min. Max.
Vsc Board 1 5V Stand_by 5.0 - 5 0.03 1.0 200/950
(Signal 2 5V 5.2 - 5 0.5 4.5 200/950
Interface) 3 12V 12 - 5 0 1.6 200/850
4 +17 - 5 0 0.7 200/850
Vaudio
5 -17 - 5 0 0.7 200/850
6 33VT 33 - 7 0 0.05 200/850
*1PDP 7 5Vctrl 5.2 - 5 3.0 7.5 200/950
Module 8 Va 60 55~66 1V 0.005 1.6 550/1V
9 Vs 190 10 1V 0.1 2.2 550/1V
-16-
Description Of Each BLOCK
3.2 Output protection
No. Output Output *2Over Current *3Over Voltage Short circuit
Name Typical(V) Protection(A) Protection(V) protection
1 *1
5V 5.0 Short test
stand_by protection
2 5Vctrl 5.2 13.0 or more 5.5~7.0
3 5V 5.2
4 12V 12 1.76 or more 13~17
5 Vaudio +17 1.0 or more 19~24 No hardware
6 -17 1.0 or more -19 ~ -24 failure
7 33VT 33 0.08 or more 36~44
8 Va 60 1.86 ~ 3.30 67 ~80
9 Vs 190 2.42 ~ 4.25 205~230
4. Input/Output pin assignment & specification
-17-
5. SERVICE MODE
5-1. Entering SERVICE MODE
Push "UP" "MUTE" "DISPLAY" "MUTE" BUTTON of Remote Controller to enter
SERVICE adjustment MODE.
5-2. Check initial data of Video PCB
(1) Check initial data of User Menu
1) Picture
- Mode : Normal
BRIGHTNESS : 35
CONTRAST : 47
COLOR : 32
TINT : 0 (CENTER) * Not displayed when PAL or SECAM input
SHARPNESS : 4
- Color Temp. : Normal
2) Sound
- Balance : 0 (CENTER)
- Spatial Effect : Off
- Sound Mode : Normal
120 Hz : 0 (CENTER)
500 Hz : 0 (CENTER)
1.5 KHz : 0 (CENTER)
5 KHz : 0 (CENTER)
10 KHz : 0 (CENTER)
3) Screen Mode : Normal
4) Utility
- Background : Opaque
- Language : English ( selected when Power ON by user just after manufacturing )
- ISM
Pixel Shift : Off
Low Bright : Off
Image Invert : Off
5) Input
- DSP-4222, DSP-5012:AVI(SCART)
- DSP-4220/24, DSP-5010/14:VIDEO1
(2) Check initial data of Service mode
1) PW 171
- Sub-Brightness : 28
- Sub-Contrast : 40
- Bias R : 60
- Bias G : 60
- Bias B : 68
-18-
SERVICE MODE
- Gain R : 70
- Gain G : 70
- Gain B : 64
2) SAA 7118
- Sub BRT : 128
- Sub CONT : 50
- Sub CLR : 55
- Sub TINT : 0
- Sub SRP : 10
3) DPTV
- Sub BRT : 61
- Sub CONT : 16
4) CXA 3516
- Sub CONT : 58
- Cb OFFSET : 39
- Cr OFFSET : 37
- HYS :3
- THRSLD : 14
5) MSP34X0
- PRESCALE : 22
6) MISC
- AT PWR : OFF
- JACK : Scart(Normal)
- PXL SFT : OFF
7) PANEL
- ISM : OFF
- BWINV : OFF
- GAMMA : 2.2
- BRIGHT : 100 %
- SCROLL : OFF
- P SAVE :100 %
- MOVING : AV
- STILL : AV
5-3. Description of SERVICE MODE Items
1) PW171 : It is a Image processor and used to adjust White balance.
[Note] This article is for adjustment after replacement of VIDEO PCB. These values may vary
from set to set. Therefore if these values are recorded before replacing VIDEO PCB, you do
not need to adjust WHITE BALANCE additionally. The setup can be done using the
recorded values.
-19-
SERVICE MODE
(1) SUB BRT : For BRIGHTNESS adjustment (fixed)
(2) SUB CONT : For CONTRAST adjustment (fixed)
(3) BIAS R : For R BIAS adjustment (Changeable)
(4) BIAS G : For G BIAS adjustment (Changeable)
(5) BIAS B : For B BIAS adjustment (fixed)
(6) GAIN R : For R GAIN adjustment (Changeable)
(7) GAIN G : For G GAIN adjustment (Changeable)
(8) GAIN B : For B GAIN adjustment (fixed)
2) SAA7118 : It is a VIDEO DECODER and used to adjust a picture quality for VIDEO/DVD(480i).
[Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) SUB BRT : For BRIGHTNESS adjustment (VIDEO/DVD) (fixed)
(2) SUB CONT : For CONTRAST adjustment (VIDEO/DVD) (fixed)
(3) SUB CLR : For COLOR adjustment (VIDEO) (fixed)
(4) SUB TNT : For TINT adjustment (VIDEO) (fixed)
(5) SUB SRP : For SHARPNESS adjustment (VIDEO) (fixed)
3) DPTV : Be used to adjust DEINTERLACE performance.
[Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) SUB BRT : For BRIGHTNESS adjustment (VIDEO/DVD) (fixed)
(2) SUB CONT : For CONTRAST adjustment (VIDEO/DVD) (fixed)
4) CXA3516 : It is a DTV/PC PROCESSOR and used to adjust a picture quality for DTV/PC.
[Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) SUB CONT : For CONTRAST adjustment (fixed)
(2) Cb OFFSET : For Cb Offset adjustment (fixed)
(3) Cr OFFSET : For Cr Offset adjustment (fixed)
(4) HYS : For Sync hysteresis adjustment (fixed)
(5) THR SLP : For Sync threshold adjustment (fixed)
5) MSP34X0
[Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
change initial values.
(1) PRESCLE : Be used to adjust a Audio prescale.
6) MISC
(1) TST PTRN AT : Cycled patterns from R G B WH every 1 minute automatically.
-20-
SERVICE MODE
(2) TST PTRN MA : Cycled patterns from BK WH R G B by pressing volume up key
(3) AT PWR : ON - Condition where turning AC power on, automatically turns the SET on.
OFF - Condition where turning AC power on makes the Set STAND BY, and POWER of
Remote-controller on turns the set on from STAND BY state.
(4) JACK : Set up depending on input MODE of JACK BOARD
- SCART(Normal) : MULTI + DVI + SCART (DSP-4222LVS, DSP-5012LXS)
- MULTI : Used by DSP-4280 series, Multimedia monitor.
- MONITOR : Used by DSP-4282 series, PC only monitor.
- MONITOR+ : Used by DSP-4282 series with DSP-JU20 attached, PC only monitor with
External board connection.
- DVI : MULTI + DVI, Used by DSP-4284 series, DSP-4220/4224LVS and DSP-5010/5014LXS
- VIDEO : Video only monitor
[Note] Wrong setup causes displaying problem. So you must be careful when SETTING.
(5) PXL SFT : To choose a picture auto shift mode to protect a PDP(Ghost fault)
ON - Moving screen up, down left and right by some Pixels every 20 seconds.
OFF - Fixing PIXEL position. No movement on screen.
[Note] PIXEL SHIFT function is solution to characteristic phenomenon of PDP, so-called
"Image Sticking" problem. Leave this function ON, when displaying many fixed screen
like PC screen. When this function is ON the screen will move a little for every fixed
interval but a human eye can not recognize it well.
7) INFOR
(1) VER : MICOM VERSION
(year 4 digits, month 2 digits, date 2 digits and time 4 digits : 200309222030 )
8) RESET
(1) EDID SET
[Note] Be used to set to write EDID data (After setting it is changed to "EDID DONE"). Before
setting EDID, you have to short jumpers of JP710. After setting, you must remove jumpers,
and then, turn off and on main power. If "EDID WRITING ERROR" is displayed, Try
again. But, in DEUK, you don't have to set EDID set (After removing jumpers, EDID
DONE is changed to EDID SET).
(2) LEVEL 1 : Be used to initialize all of the data including adjusted figures for W/B.
(3) LEVEL 2 : Be used to initialize all of the data except adjusted figures for W/B
(4) FACTORY : For User menu initialization, is actaviated by choosing a language on AC ON
mode. (Menu Display, VOL, OSD Background and Input mode (VIDEO 1) initialization).
9) PANEL
(1) ISM : Used to minimize Image
Sticking (ON/OFF).
ON : When Still images or regular
patterns have been displayed
on screen for some times, the
luminance of screen is going
to decrease as below. (But,
only when pattern area is over
50% and it is lasting over 5
minutes)
-21-
SERVICE MODE
(2) BWINV : Used to minimize Image Sticking
(ON/OFF) Table Gamma Contents
ON : Inverting the original images.(in Digital image 1 =2.2(default)
data, "0" "1", "1" "0") 2 =1
* If Still images have been displayed for some 3 =2.0
periods, this function can minimize Image sticking, 4 =2.4
by displaying it on BWINV mode for some times.
(3) GAMMA : can choose one in 4 gamma tables
(4) BRIGHT : Adjusting Peak Luminance
1. 100% : Full Peak Luminance
2. 63% : 63% of Peak luminance
3. 40% : 40% of Peak luminance
(* See the graph right)
4. APL: Average Picture Level
(5) SCROLL : Minimizing Image Sticking (ON/OFF) by Shifting whole screen BRIGHT :
Adjusting Peak Luminance. (same with PXL SFT function in 6)MISC)
ON : This function moves1~8 pixel with a regular rule, up, down, left, right every
10 sec
(6) BRIGHT : Adjusting Peak Luminance
(7) P SAVE : Controlling power consumption by changing Luminance level of whole screen.
1. 100% : Peak Luminance & Maximum Power Consumption mode
2. 87% : 87% mode
3. 75% : 75% mode
4. 50% : 50% mode
5. linear : linear mode(Constant luminance without regard to APL)
* WARNING!! The choice of these modes can cause difference of Power Consumption.
* See the below
(8) MOVING : Setting display mode of Input channel except PC input.
(9) STILL : Setting display mode for PC input.
-22-
6.Adjusting Method
6-1. Adjusting WHITE BALANCE
1) Apply 5 Step Gray Scale pattern to Video input terminal
(MIK 7253S PATTERN NO.9)
Fig. 2 5 Step Gray Scale Pattern
2) Check initial data of User Menu ( refer to 5-2 )
3) To enter Service mode, press button "up > mute > recall > mute" on the remote controller and
select PW171, then check initial data of Service mode( refer to 5-2 ).
4) Attach a sensor of White Balance Meter(CA-100) to 80% of white level on the screen.
5) Adjust White Balance by varying Gain of R,G,
* Gain of R, G, should be adjusted to DP+ 10 ,if beyond these then that is a specification fault
* Coordinate of Color is x=0.280 + 0.005, y=0.290 + 0.005 and the Color Temperature is over 10,000-
degree K.
6) Attach a sensor of White Balance Meter to 40% of white level on the screen
7) Adjust White Balance by varying the values of R,G,
* Values of R,G, should be adjusted to DP + 5 ,if beyond these then that is a specification fault
* Coordinate of Color is x=0.280 + 0.005, y=0.290 + 0.005.
8) Repeat No 4) to No 7) until getting that Coordinate of Color is x=0.280, y=0.290, and then adjust
Sub Contrast to over 150 Cd/m square after attaching a sensor of White Balance Meter to 100% of
white level on the screen.
9) To exit from Service mode, press Menu button on the remote controller.
6-2. POWER ADJUSTMENTS
* Video pattern condition : 100 IRE Full White Pattern
* POWER PCB Adjustments mean that you should set the following 2-type power voltages to the
values which were already adjusted by PDP module (LG Module) maker. Therefore, if there are
some problems in picture after adjusting, you should classify that PDP module as a fault and contact
to PDP module maker.
1. Vsus (SUSTAIN Voltage) : Discharge Sustain Voltage
Measurement equipment : Digital Volt Meter ( DC Volt mode )
Adjusting TP : TP3 (See Fig. 4, GND TP:TP2)
Adjusting Location : VR1(See Fig. 4)
Adjusting Voltage : Voltage which is written in Label which is at upper center side of PDP
Module(Vs). (Typical Voltage : 192 V - Fig. 3)
-23-
Adjusting Method
Fig. 3 Power Connection and Voltage Adjustment Label
2. Vadd (ADDRESS Voltage) : DATA Input Voltage
Measurement equipment : Digital Volt Meter (DC Volt mode)
Adjusting TP : TP1 (See Fig. 4, GND TP:TP2)
Adjusting Location : VR5 (See Fig. 4)
Optimum Adjusting Voltage : Voltage which is written in Label which is at upper center side of
PDP Module(Va). (Typical Voltage : 60V - Fig. 3)
-24-
Adjusting Method
Fig. 4 Power Adjustment Points
-25-
7.SOFTWARE UPGRADE Method
1. Connect the JACK PCB to the Video PCB.
2. Connect 9 PIN serial cable to the serial port of the computer.
3. Connect the opposite end of the serial cable to RS-232C port of Jack PCB.
4. Run Flashupgrader.exe in PC and then push "Next(N) >" button.
5. Select current Upgrade file
- Click "Browse" button to select the file you want to upgrade.
-26-
SOFTWARE UPGRADE Method
- Select the file (pwSDK.inf) you want to upgrade and Push "Open(O) >" button.
6. Select as above and push "Next(N) >" button.
7. Select Comm Port and Baud Rate and push "Next(N) >" button.
-27-
SOFTWARE UPGRADE Method
8. Upgrade process will be displayed. Turn on the ac power and then upgrade program will initiate the
download.
9. When all files upgrade are complete, a window (below) will be opened. Push "Finish" button to
complete the process.
-28-
8. Main PCB Trouble Diagnosis
[NOTE] See "B. PARTS of MODULE" of this service manual for the trouble diagnosises concerned to
MODULE with exception of VIDEO, JACK and POWER parts.
8-1. VIDEO & JACK PCB Trouble Diagnosis
1. Common checking process when "No signal" or "No raster"
Check start
Y
N 1. Confirm AC connection
N Is there a weak 2. Confirm Power S/W ON
Does "No signal" screen
discharge on the 3. Check other PCBs
appear?
screen? (Refer to B. Parts of Module)
Y
Y
N
Is P604 correctly Check P201
N Check the connection of connected?
Is the signal input Jack
correctly connected? Jack(PDP or AV devide)
Y
Y
N Is DVS, DHS, DCLK of N
Does input source Exchange Video PCB
(AV device)operate?
Operate AV device Video PCB normal?
Y Y
N Confirm input 1. Check other PCBs (CTRL_LVDS,
Is input selection in used Y/Z-SUS, CONNECTION PCBs...)
selection
mode? 2. Reassemble or change P201
Y
Exchange Video or Jack PCB
2. When No VIDEO SCART(AV1, AV2), COMPOSITE(AV3), S-VIDEO(AV3), Y Cb Cr) signal on screen
(1) Input PC or DTV signal and see if PC or DTV signals shown on screen.
If no signal, check TP DCLK, DHS and DVS signal.
If DCLK, DHS and DVS signal do not appear, VIDEO PCB has a trouble.
(2) When Y Cb Cr input : Check 16th pin of P502.
COMPOSITE Input : Check TP Vin.
-29-
Main PCB Trouble Diagnosis
S- VHS input : Check 24th pin of P502 (when COLOR BAR PATTERN).
If above signal do not appear, JACK PCB has a trouble.
(3) TP DECOE Check
If DECOE signal do not appear, JACK PCB has a trouble.
(cf. When COMPOSITE NTSC 3.58MHz, check TP COMB. CCOMB as well)
(4) Check TP VVS, VHS, VCLK and VPEN1
If VVS, VHS, VCLK and VPEN1 signal do not appear, JACK PCB has a trouble.
3. When DTV (1080i, 720P, 480P) signal do not appear on screen
(1) Input PC or VIDEO signal and see if PC or VIDEO signals shown on screen.
If no signal, check TP DCLKB, DHS and DVS.
If DCLKB, DHS and DVS signal do not appear, VIDEO PCB has a trouble.
(2) Check P502's 1st PIN(V SYNC) , 2nd PIN(H SYNC) check-
If above signals do not appear, JACK PCB has a trouble.
(3) Check TP GHS, GVS and GCLK.
If GHS, GVS and GCLK signal do not appear, JACK PCB has a trouble.
-30-
Main PCB Trouble Diagnosis
4. When PC signal do not appear on screen
(1) Input DTV or VIDEO signal and see if DTV or VIDEO signals shown on screen.
If no signal, check TP DCLKB, DHS and DVS.
If DCLKB, DHS and DVS signal do not appear, JACK PCB has a trouble.
(2) Check 1st PIN (V SYNC), 2nd PIN (H SYNC) of P502 (when 800 x 600).
If above signal do not appear, JACK PCB has a trouble.
(3) Check TP GHS, GVS and GCLK.
If GHS, GVS and GCLK signal do not appear, JACK PCB has a trouble.
5. When No Sound
-31-
Main PCB Trouble Diagnosis
6. When Key does not operate
Check start
Y
1. Confirm AC connection.
Does LED next to Power N 2. Confirm Power S/W ON.
3. Check other PCBs
S/W turn on in Red?
Y
N 1. Check the connection to Video PCB.
Does LED
2. Check the Video PCB or other PCBs.
turn on in Green?
Y
N 1. PA601 CONNECTOR has a trouble.
Is 2nd pin of P601 output normal? 2. Exchange Key PCB.
Y
Check VIDEO PCB
-32-
Main PCB Trouble Diagnosis
7. When Remote Controller does not operate
Check start
Y
1. Confirm AC connection.
Does LED next to Power N 2. Confirm Power S/W ON.
S/W turn on in Red? 3. Check other PCBs.
Y
N Check the Battery of
Does Remote Controller Remote Controller
operate?
Y
N 1. Check the connection to VIDEO PCB
Does Set turn on with 2. Check VIDEO PCB
Key operation?
Y
Whenever push the botton of LED PCB has a trouble.
N So, Exchange LED PCB
remote controller, does 2nd Pin of
P602 output?
Y
1. IR Receiving BLOCK of VIDEO PCB has a trouble.
2. Check VIDEO PCB
-33-
Main PCB Trouble Diagnosis
8-2. POWER PCB Trouble Diagnosis
Although Z-SUS / Y-SUS / SCAN / DATA COF (refer to B. PARTS of MODULE) are checked,
but still the set does not operate, and then check if Trouble Symptoms of the following Power PCB
appear.
After unplugging Power Connectors of Z-SUS / Y-SUS PCB(P805A, P806A) and checking
remaining voltage, there still exist several tens of remaining voltage.
When output condition of Power Module is set to low-voltage, output voltage table lists 1~7
are NOT normal. Or when set to high-voltage, output voltage table list 8~9 are NOT normal.
(Refer to 4-2)
When output condition of Power Module is set to low-voltage, output voltage table lists 1~7
are normal. But when set to high-voltage, output voltage table list 1~2 are NOT normal.
(Refer to 4-2)
After turn on the PDP set with Remote Controller, when output condition of Power Module is
set to high-voltage, the LED turn "Green" but the "Power Shut Down" happens after 2~3
seconds.
If high voltage (Vsus, Vadd) measured from Power PCB is different from that of optimum
adjusting voltage label, re-adjust the voltages referring to "A. 6-2. POWER Adjustments"
-34-
9. TROUBLE SHOOTING
[NOTE] See "B. PARTS of MODULE" of this service manual for trouble shooting concerned to
MODULE with exception of VIDEO, JACK and POWER parts.
9-1. Facts you must know at trouble diagnosis or repairing
(1) The trouble diagnosis and repairing of set means "Module Exchange". In other words, find out
which PCB modules are not working and replace them with normal PCB modules. Do not need to
fix broken PCB modules in themselves.
(2) This TROUBLE SHOOTING list only contains representative and simple PCB trouble diagnosis
and Module Exchange method. Therefore, if you find Sets that are difficult to diagnose or to
repair, contact Daewoo Electronics.
(3) Basic TROUBLE SHOOTING procedure
Check Trouble Symptoms Detach BACK COVER Trouble Diagnosis Replace broken
PCB module Adjust new PCB module (when replacing Z-SUS, Y-SUS, POWER,
VIDEO PCB, need Adjusting Procedure. Refer to A.6. Adjusting Method and B.3. Adjustments)
HEATRUN(for at least 30 minutes, input TEST PATTERN FULL WHITE), FUNCTION
CHECK Repair Complete.
(4) Keep broken PCB modules separately for replacing with new PCB modules.
(5) Required equipments for trouble diagnosis
- DIGITAL MULTIMETER (User Mode : measure DC VOLTAGE, measure DIODE VOLTAGE,
SHORT-OPEN TEST )
- Screwdriver (or electric screwdriver), plastic adjusting tool
(6) Each BLOCK operation was explained including DIGITAL OSCILLOSCOPE signal, but this is
reference only and applying them for repair is not necessary. (After additional education, DIGITAL
OSCILLOSCOPE could be used)
(7) Before assemble/disassemble PCBs, check to see if AC Switch is "OFF".
(8) After replacing Z-SUS, Y-SUS, POWER, VIDEO PCB, the PCB needs extra adjustment. (Refer to
A.6. Adjusting Method and B.3. Adjustments)
(9) After the set is repaired, leave BACK COVER open for followings. Do HEATRUN for at least 30
minutes by inputting TEST PATTERN of SERVICE MODE (Refer to Service Manual A.5. Service
Mode) FULL WHITE. Check the screen conditions and basic functions (remote control operation
etc.).
(10) After BACK COVER is closed, redo HEATRUN for at least one hour by inputting FULL
WHITE using TEST PATTERN of SERVICE MODE. Check the screen conditions and basic
functions.
9-2. Symptoms of VIDEO or JACK PCB Trouble
(1) Symptoms of POWER PCB Trouble
Not even weak discharge (luminescence) shows on screen.
Discharge (luminescence) on screen is unstable
Set is producing unusual noise
POWER SHUT DOWN occur (refer to Service Manual A. 9-3)
(2) Symptoms of VIDEO or JACK PCB Trouble
Only weak discharge (luminescence) shows on screen, but No Data is on screen
Screen DATA is abnormal
Particular input signal (Video, PC or Component etc.) does not operate
-35-
Trouble shooting
No SOUND
The Set does not operate normally. But, after turn off AC Power, if turn on again, it
operates normally again.
Remote Control or KEY does not operate
POWER SHUT DOWN occur (refer to Service Manual A. 9-3 )
(3) Representative Symptoms caused by bad Connection between PCBs.
[Note] Dust or extraneous materials is most likely to cause bad connection. Most of this case, it
can be solved if using soft brush, AIR FRESHER, or breath to clean dust or extraneous
materials or reassembling the Connector.
* Refer to Chapter B for Symptoms of other parts with exception of VIDEO, JACK PCB and POWER
PCB Trouble.
9-3. Trouble Diagnosis and Repairing Method for Representative Symptoms
(1) When POWER SHUT DOWN occurs
<1> Definition of "SHUT DOWN"
- When LED color is green, you can't hear power operating sound. (Red : STAND BY, Green :
Operating)
- When turn on AC switch and then push "POWER" button of remote controller, power relay do
not operate normally, and POWER operating sound can not be detected.
<2> Trouble Repairing Procedure
- As shown in Fig. 5, first check which of "LOW VOLTAGE" part or "HIGH VOLTAGE" part has
a trouble.
- If "LOW VOLTAGE" part is broken is checked, as shown in Fig. 6 diagnose the SET and then
replace the broken PCB.
- If "HIGH VOLTAGE" part is broken is checked, as shown in Fig. 7 diagnose the SET and then
replace the broken PCB.
- When disconnecting/connecting connectors, you must turn "OFF" the AC power and
check the direction/position of them before working.
- If you turn the SET "ON" with POWER CONNECTORS of Z-SUS PCB and Y-SUS
PCB (P805A, P806A) disconnected, although you turn the SET "OFF" again,
Remaining Voltage still exists in the POWER PCB. Therefore assemble the connectors
several minutes after. Or, check the Remaining Voltage (Vsus, Vadd) by multimeter. If
Vsus is less 10V, connect connectors. Connecting connectors with the Remaining
Voltage (Vsus, Vadd) over 10V could generate sparks and be dangerous to Operators or
SET.
(2) When weak Discharge exists on screen but "OSD" screen" can not be seen
<1> Definition of this symptom
- When the set was turned on, screen is BLACK but Weak Discharge (luminescence) exists.
- When OSD does not show on screen and the set does not respond to remote controller or any
button of KEY panel.
<2> PCB CHECK PRIORITY
- VIDEO PCB
-36-
Trouble shooting
<3> Trouble Repairing Procedure
- If no problem in Connection(VIDEO PCB ==>CONTROLLER PCB), replace VIDEO PCB
AC PWR "OFF"
BACK COVER "OPEN"
POWER PCB's HIGH VOLTAGE
SWITCH "OFF" (refer to Fig.4)
AC PWR "ON"
PWR "ON" with Remote Controller
YES "SHUT DOWN" NO
occur?
* LOW VOLTAGE part is N.G. * HIGH VOLTAGE part is N.G.
* PCB check priority: * PCB check priority:
CTRL_LVDS => VIDEO => POWER Z-SUS => Y-SUS => SCAN
* Trouble Diagnosis in order shown => DATA => POWER
as Fig.6 * Trouble Diagnosis in order shown
as Fig.7
Fig. 5 Trouble Diagnosis Flow when "SHUT DOWN" occurs
-37-
Trouble shooting
AC PWR "OFF"
HIGH VOLTAGE SWITCH of
POWER PCB "OFF" (refer to Fig.4)
Disconnect PWR Connectors of
Z-SUS and Y-SUS(P11, P8, P3, P4)
AC PWR "ON" => PWR "ON" with
Remote Controller
YES "SHUT DOWN" NO
occur?
AC PWR "OFF" AC PWR "OFF"
Disconnect PWR Reconnect only PWR Connector
Controller PCB(P300) of Y-SUS(P8, P3, P4)
AC PWR "ON" => PWR "ON" with AC PWR "ON" => PWR "ON" with
Remote Controller. Remote Controller
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