Service Manual
Page 64
.../ handling this before service. Whether it can touch circuit after removing power some current remains in drive circuit. Ex) COF long 2-1 fail ,address 1 line open, Y b/d problem , mis-discharge. 9
.../ handling this before service. Whether it can touch circuit after removing power some current remains in drive circuit. Ex) COF long 2-1 fail ,address 1 line open, Y b/d problem , mis-discharge. 9
Service Manual
Page 65
Even a little imperfection of COF can make a serious screen problem. SCRATCHING TEARING BEING PUSHED BENDING CHOPING Precaution Handle with care (COF) COF is the most important component in the PDP module. 2.
Even a little imperfection of COF can make a serious screen problem. SCRATCHING TEARING BEING PUSHED BENDING CHOPING Precaution Handle with care (COF) COF is the most important component in the PDP module. 2.
Service Manual
Page 77
Exhaust tip Crack Confirm exhausting Tip and find Crack with naked eyes. If there is different from Capacitor noise. ) NORMAL CRACKED 22 And this noise is problem replace the module . in case of vacuum breakdown, module makes a shaking noise because of inside gas ventilation. (there may be a small crack which could not see with naked eyes to check vacuum state. Trouble shooting. 2. 4.
Exhaust tip Crack Confirm exhausting Tip and find Crack with naked eyes. If there is different from Capacitor noise. ) NORMAL CRACKED 22 And this noise is problem replace the module . in case of vacuum breakdown, module makes a shaking noise because of inside gas ventilation. (there may be a small crack which could not see with naked eyes to check vacuum state. Trouble shooting. 2. 4.
Service Manual
Page 84
Power protection function protect the boards when occurred short on . If can not impress power even after replacing PSU, find out where the short occurred. * PSU makers. DAEGIL PSU UNICON PSU 29 Power protection It is power protection when power is off automatically within 2~3 min. from power on circuits of PDP module or power problem. Trouble shooting. 4.
Power protection function protect the boards when occurred short on . If can not impress power even after replacing PSU, find out where the short occurred. * PSU makers. DAEGIL PSU UNICON PSU 29 Power protection It is power protection when power is off automatically within 2~3 min. from power on circuits of PDP module or power problem. Trouble shooting. 4.
Service Manual
Page 88
A flow of address signal In this figure, we can easily suppose what will be appeared on screen, It may be the ctrl b/d problem. Buffer IC 96 output So if there is a bar defect on screen when a specific part failed. Trouble shooting. 3. 4. Ctrl B/D CTRL B/D supplies video signal to COF.
A flow of address signal In this figure, we can easily suppose what will be appeared on screen, It may be the ctrl b/d problem. Buffer IC 96 output So if there is a bar defect on screen when a specific part failed. Trouble shooting. 3. 4. Ctrl B/D CTRL B/D supplies video signal to COF.
Service Manual
Page 89
Vertical defect (line) 1 line open or short with same distance. In this case, replace the panel. 1 electrode open 1 line open Line open or short This phenomenon is MCM of the Film and rear panel electrode problem. MCM can not be replaced separately. This is due to COF IC inside short or adherence part of Ctrl b/d defect. So replace the ctrl b/d. 4. Trouble shooting. MCM (Multi Chip Module)
Vertical defect (line) 1 line open or short with same distance. In this case, replace the panel. 1 electrode open 1 line open Line open or short This phenomenon is MCM of the Film and rear panel electrode problem. MCM can not be replaced separately. This is due to COF IC inside short or adherence part of Ctrl b/d defect. So replace the ctrl b/d. 4. Trouble shooting. MCM (Multi Chip Module)
Service Manual
Page 94
If no problems, check 15V(Y,Z B/D) with GND, Î Forward value 0.3V, Reverse value infinite. Trouble shooting. but, the terminal of Vs,Sus-out,GND, we must aware to ... => OK Specially, the value of ER-UP,COM,DN in the Y/Z board, should be checked all of IPM because it is parallel. Æ if no problems, 40 How to know after check one of them. 4.
If no problems, check 15V(Y,Z B/D) with GND, Î Forward value 0.3V, Reverse value infinite. Trouble shooting. but, the terminal of Vs,Sus-out,GND, we must aware to ... => OK Specially, the value of ER-UP,COM,DN in the Y/Z board, should be checked all of IPM because it is parallel. Æ if no problems, 40 How to know after check one of them. 4.