Daewoo DP-42SM-2 Service Manual
CONTENTS
1.COMMENTS
2.SAFETY PRECAUTION
3.PRODUCT SPECIFICATION
4.BLOCK DIAGRAM
5.AV BLOCK DESCRIPTION
6.LVDS SPECIFICATIONS
7.SERVICE MODE (VIDEO PCB INITIAL DATA)
8.SOFTWARE UPGRADE METHOD
9.POWER ADJUSTMENTS
10.ASSEMBLY LIST
11.PDP MODULE CHECK POINT
11-1. Flow Chart
11-2. Serial Number
11-3. Panel Crack
11-4. Flexible Cable
11-5. Connectors
11-6. Tester Checking
11-7. Strip Defect
11-8. Vertical Line
11-9. Horizontal Line
12. EXPLODED VIEW
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1. COMMENTS
This paper is the additional service manual for the DP-42SM/WM/GM using the NEC panel.
Other service contents with the exception of this manual are same as the existing service manual (DP-42SM/WM/GM). The existing service manual was made for ORION panel.
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2. Safety Precautions
(1)When moving or laying down a PDP Set, at least two people must be working. 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 broken Set’s condition, 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.If this part is damaged, entire PDP PANEL must be replaced. Therefore, when working, be careful not to damage this part.
(6)A PDP Set contains 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.
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3. Product Specification
I T E M |
S P E C I F I C A T I O N |
REMARK |
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1. GENERAL |
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1-1. MODEL NO |
DSP-4280NVS |
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1-2. CHASSIS NO |
SP-115 |
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1-3. SCREEN SIZE |
42”(16:9) |
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1-4. COUNTRY |
WORLD WIDE |
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1-5. RESOLUTION |
853(H) X 480(V) |
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1-6. REMOCON TYPE |
R-V28A (E) |
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1-7. SAFETY STANDARD |
UL, C-UL, CE, CB, FCC(CLASS B), |
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CE(CLASS B) |
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2. MECHANICAL |
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2-1. APPEARANCE |
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1) WITHOUT STAND |
WxHxD=1,039 x 628 x 80 mm |
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2) WITH STAND |
WxHxD=1,039 x 725 x 320 mm |
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3) CARTON BOX |
WxHxD=1,256 x 800 x 327 mm |
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2-2. WEIGHT |
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1) WITHOUT STAND |
29.9 Kg |
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2) WITH STAND |
36.8 Kg |
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3. ELECTRICAL |
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3-1. VIDEO INPUT |
COMPOSITE(NTSC, PAL, SECAM, |
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PAL-M/N, NTSC4.43) & |
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S-VHS(50/60Hz Y/C) 2SETS |
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3-2. DTV/DVD INPUT |
1080 i, 720P, 480P , 480i |
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(Y, Pb/Cb, Pr/Cr COMPONENT |
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SIGNAL) 2SETS |
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3-3. PC INPUT |
VGA ~ UXGA (15 PIN D-SUB) 1SET |
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3-4. SOUND INPUT |
VIDEO 2SETS, DTV/DVD 2SETS, |
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PC 1SET |
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3-4. SPEAKER OUTPUT |
8W(R) + 8W(L) |
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3-5. POWER REQUIREMENT |
AC 100V~240V, 50/60Hz |
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3-6. POWER CONSUMPTION |
320W |
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3-8. RS-232 CONTROL |
RS-232(FOR SOFTWARE UPGRADE) |
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3-9. FUNCTION |
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1) SCALING |
PC: H/V SIZE & POSITION ADJUST |
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VIDEO/DTV/DVD:NOMAL,16:9, |
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PANORAMA,ENLARGE LB,ENLARGE |
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LBS |
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2) ZOOM |
20 SCALE ZOOM & PANING |
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3) OSD |
SUPPORT 11 LANGUAGES |
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4) OTHERS |
STILL, SLEEP MODE,SOUND MODE |
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I T E M |
S P E C I F I C A T I O N |
REMARK |
4. OPTICAL |
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4-1. SCREEN SIZE |
42”(106Cm) DIAGONAL |
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4-2. ASPECT RATIO |
16:9 |
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4-3. NUMBER OF PIXELS |
853(H)X480(V) |
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4-4. DISPLAY COLOR |
16.77 MILLION COLOR (8BIT RGB) |
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4-5. PIXEL PITCH |
1.08(H)X1.08(V) |
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4-6. PEAK LUMINANCE |
300cd/ (WITH FILTER GLASS) |
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4-7. CONTRAST RATIO |
1500:1 |
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4-8. VIEWING ANGLE |
160 |
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DEGREE(VERTICAL/HORIZONTAL) |
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5. USERCONTROL & ACCESSORY |
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5-1 CONTROL BUTTON(SET) |
AC POWER BUTTON(PUSH-PULL |
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S/W) |
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MENU, SELECT, UP, DOWN, LEFT, |
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RIGHT(SOFT S/W) |
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5-2. REMOTE CONTROL(R-V28) |
POWER,INPUT |
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SELECT,DISPLAY,ZOOM-, |
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ZOOM+, MENU, UP, |
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DOWN,VOLUME UP, |
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VOLUME DOWN,FREEZE,SCREEN |
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MODE, |
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SOUND MODE,SLEEP |
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5-3. ACCESSORIES |
REMOCON, |
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BATTERY,INSTRUCTION MANUAL |
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A/V CABLE,STAND, |
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WALL HANGER, |
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SPEAKER R/L |
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4. BLOCK DIAGRAM
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5. A/V BLOCK DESCRIPTION
5-1. A/V BLOCK DIAGRAM
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5-2.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, 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, output 3.3V DC LEVEL
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(3) IC406 (DPTV-MVS)
-A Scan Rate Converter which converts Interlace signal into Progressive signal *TP
A. VVS : VERTICAL SYNC (output by DPTV-MVS)
B. VHS : HORIZONTAL SYNC (output by DPTV-MVS)
C. VCLK : CLOCK (output by DPTV-MVS)
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(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 by CXA3516)
B .GHS : HORIZONTAL SYNC for GRAPHIC (output by CXA3516)
C. GCLK : CLOCK for CLOCK (output by CXA3516)
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D. GFBK : SYNC for PLL
(5) IC600 (PW171) - Image processor IC *TP
A. DEN : DATA ENABLE (output by PW171)
B. DHS : HORIZONTAL SYNC (output by PW171)
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C.DVS : VERTICAL SYNC for DISPLAY (output by PW171)
D. DCLKB : CLOCK for DISPLAY (output by PW171)
5-3. 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(7_INPUT 3_OUTPUT AUDIO/VIDEO SWITCH) - The IC perform AUDIO or VIDEO SWITCHING
(3)IC700(MULTI STANDARD SOUND PROCDSSOR)
-AUDIO SINGNAL VOLUME control, EQUALIZER control
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*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
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6. LVDS CABLE
CAUTION!
After servicing, you must check
if ring core is coupled with LVDS cable. Otherwise, PDP may not display.
DIGITAL BOARD (PANEL)
VIDEO BOARD
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