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42" PLASMA PDP MONITOR CHASSIS : SP-115 MODEL : DP-42SM (FOR LG MODULE)
DAEWOO ELECTRONICS Corp. http : //svc.dwe.co.kr Nov. 2003 Contents I. 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 4-3. BASIC CONGIFURATION 17 5. SERVICE MODE 5-1. Entering SERVICE MODE 18 5-2. Default Values For SERVICE MODE Items 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 25 8. Main PCB Trouble Diagnosis 28 8-1. VIDEO & JACK PCB Trouble Diagnosis 28 8-2. POWER PCB Trouble Diagnosis 33 9. TROUBLE SHOOTING 9-1. Facts You Must Know When Diagnosing And Repairing 34 9-2. Representative Symptoms When Each PCB Breaks Down 34 9-3. Trouble Diagnosis And Repairing Method For Representative Symptoms 35 10. ASSEMBLY LIST 39 11. EXPLODED VIEW 42
II. Parts of MODULE 1. Safety Precautions 43 2. Formation and Specification of Module 46 3. Adjustment 47 4. Trouble Shooting 52 4-1 Checking for No Picture 52 4-2 Hitch Diagnosis Following Display Condition 54
-1- 4-2-1. 4/7 or 3/7 of the screen doesn't be shown 54 4-2-2. Screen doesn't be shown as Data COF 54 4-2-3. It is generated unusual pattern of Data COF IC unit 55 4-2-4. Regular Stripe is generated about the quantity of one Data COF IC or more 56 4-2-5. Screen doesn't be shown at all as scan COF 56 4-2-6. Regular stripe is generated at regular internal on the whole screen 57 4-2-7. Data copy is generated to stripe direction 57 4-2-8. One or more stripe is generated on the screen 58 4-2-9. One or more horizontal line is generated on screen 58 4-2-10. Lightness of screen is wholly darken though there is input-signal-pattern 58 4-2-11. Different color is shown partially during full-white-screen or electric discharge is generated during full-black-screen 59 4-2-12. Full-white pattern it happened that the lightness of middle is darken while full-white pattern 59 4-2-13. Some lightness of some color doesn't not generated well 59 5. Block Diagram of Module 60
-2- I. 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-4280LVS(G, W) 1-2. CHASSIS NO SP-115 1-3. SCREEN SIZE 42 (16:9) 1-4. COUNTRY America 1-5. RESOLUTION 852(H) X 480(V) 1-6. REMOCON TYPE R-V28A(E) 1-7. SAFETY STANDARD UL,C-UL,FCC(CLASS B) 2. MECHANICAL 2-1. APPEARANCE 1) WITHOUT STAND WxHxD=1,044 x 631 x 82.8 mm 2) WITH STAND WxHxD=1,044 x 705.9 x 310 mm 3) CARTON BOX WxHxD=1,256 x 800 x 327 mm 2-2. WEIGHT 1) WITHOUT STAND 27.7 Kg 2) WITH STAND 34.6 Kg 3. ELECTRICAL 3-1. VIDEO INPUT COMPOSITE (NTSC, PAL, SECAM, PAL-M/N, NTSC4.43) & S-VHS (50/60Hz Y/C) 2 PORTS 3-2. DTV/DVD INPUT 1080i, 720P, 480P , 480i (Y, Pb/Cb, Pr/Cr, COMPONENT SIGNAL) 2 PORTS 3-3. PC INPUT VGA ~ UXGA (15 PIN D-SUB) 1 PORT 3-4. SOUND INPUT VIDEO 2 PORTS, DTV/DVD 2 PORTS,PC 1 PORT 3-5. SPEAKER OUTPUT 8W(R) + 8W(L) 3-6. POWER REQUIREMENT AC 100V~240V, 50/60Hz 3-7. POWER CONSUMPTION 320W 3-8. RS-232 CONTROL COMMUNICATION (EXTERNAL UPGRADE) 3-9. FUNCTION 1) SCREEN MODE *PC: H/V SIZE AND POSITION ADJUSTMENT *VIDEO : AUTO,16:9,PANORAMA,ENLARGE LB, ENLARGE LBS *DTV/DVD : NOMAL,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 42 (106Cm) DIAGONAL 4-2. ASPECT RATIO 16:9 4-3. NUMBER OF PIXELS 852(H)X480(V) 4-4. DISPLAY COLOR 16,700,000 COLOR( EACH 8BITS FOR RGB ) 4-5. CELL PITCH 1.08(H)X1.08(V) 4-6. PEAK LUMINANCE 360cd/ (WITH FILTER GLASS) 4-7. CONTRAST RATIO 1000:1 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)
5-3. 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- DSP-4280LVS BLOCK DIAGRAM
Y-SUB PCB Z-SUB PCB P3
IC
P1 SCAN DRIVER P2
P5 PWR P1 PWR
IC
P2 SCAN P5
DRIVER 3. BLOCK DIAGRAM
p6
P6 PWR VIDEO PCB P601 P602 KEY PCB LED PCB Crystal : 14.3 MHz
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, 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) 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
Nominal Input Voltage : AC100V to AC240V (Variation Range - AC85V to AC276V) Single-Phase full wave Regulation Method : Transistor Switching Method Input Frequency : 50~60Hz (Variation range 45Hz to 66Hz) Inrush Current : 50A zero-peak max at AC264V Output Voltage is as follows.
Connector Connector number P2 P3 P6 Model name GP390-10P-TS 1-1123723-8 GP390-04P-TS Maker LG Cable AMP LG Cable The number of pins 10 8 4 1 Vsus 190V Vsus 190V G 2 Vsus 190V Vsus 190V G 3 Vsus 190V NC V1 5.1V 4 NC G V1 5.1V Pin 5 G G number 6 G Vadd 60V 7 G G 8 G V1 5.1V 9 NC 10 NC
-16- Description Of Each BLOCK
Connector number P4 P5 P7 Model name YMW025-10R YMW025-05R YMW025-04R Maker YEONHO YEONHO YEONHO The number of pins 10 5 4 1 NC POWER (ON/OFF) V3 -17V 2 NC NC G 3 V5 12V NC G 4 G G V3 17V Pin 5 G Vstb number 6 V4 5V 7 G 8 G 9 NC 10 NC
* P2 is connected to P5 of Y-SUS PCB. P3 is connected to P1 of Z-SUS PCB. P6 is connected to P6 of Y-SUS PCB. P4 is connected to PA4 of VIDEO PCB. P5 is connected to PA5 of VIDEO PCB. P7 is connected to PA6 of JACK PCB.
4-3. Basic Configuration
Applied Voltage level is specified at the time, when full white pattern displayed on panel.
-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 - VIDEO 1
(2) Check initial data of Service mode 1) PW 171 - Sub-Brightness : 28 - Sub-Contrast : 40 - Bias R : 64 - Bias G : 64 - Bias B : 64 - Gain R : 64
-18- SERVICE MODE
- Gain G : 64 - Gain B : 64
2) SAA 7118 - Sub BRT : 128 - Sub CONT : 50 - Sub CLR : 55 - Sub TINT : 0 - Sub SRP : 10
6) MISC - AT PWR : OFF - JACK : MULTI - PXL SFT : OFF
7) PANEL - ISM : OFF - BWINV : OFF - GAMMA : 2.1 - BRIGHT : 100 % - SCROLL : OFF - P SAVE : 75 % - MOVING : AV - STILL : PC
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) (3) 50P : ON for 50Hz / OFF for 60Hz (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(SKY) : MULTI + DVI + SCART (DSP-4222LVS) - 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. - 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 initialise all of the data including adjusted figures for W/B. (3) LEVEL 2 : Be used to initialise all of the data except adjusted figures for W/B (4) FACTORY : For User menu initialisation, is actaviated by choosing a language on AC ON mode. (Menu Display, VOL, OSD Background and Input mode (VIDEO 1) initialisation). (Should be selected on being dispatched)
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 Table Gamma Contents (ON/OFF) 1 =2.2 ON : Inverting the original images.(in Digital image 2 =1 data, 0 1 , 1 0 ) 3 =2.1 (default) * If Still images have been displayed for some 4 =2.4 periods, this function can minimize Image sticking, 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 below) 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=0.270 + 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=0.270 + 0.005, y=0.290 + 0.005. 8) Repeat No 4) to No 7) until getting that Coordinate of Color is x=0.270, 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 : TP204 (See Fig. 4) Adjusting Location : RV203 (See Fig. 4) Optimum Adjusting Voltage : Voltage which is written in Label which is at upper right side of PDP Module. (Typical Voltage : 190 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 : TP206 (See Fig. 4) Adjusting Location : RV204 (See Fig. 4) Optimum Adjusting Voltage : Voltage which is written in Label which is at upper right side of PDP Module. (Typical Voltage : 65 V - Fig. 3)
Fig. 4 Power Adjustment Points -24- 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.
-25- 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.
-26- 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.
-27- 8. Main PCB Trouble Diagnosis
[NOTE] See II. 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 II. Parts of Module)
Y Y N Is P604 correctly Check P31 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 (CONTROLLER, Is input selection in used Y/Z-SUS, CONNECTION...) selection mode? 2. Reassemble or change P31
Y Exchange Video or Jack PCB
2. When No VIDEO (COMPOSITE, S-VIDEO, 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.
-28- 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.
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.
-29- 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 800X600).
--> 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.