Service Manual
Page 64
... defect phenomenon and history of B/D. 2. When using/ handling this before service. Check panel surface and appearance of module. Ex) COF long 2-1 fail ,address 1 line open, Y b/d problem , mis-discharge. 9
... defect phenomenon and history of B/D. 2. When using/ handling this before service. Check panel surface and appearance of module. 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. Precaution Handle with care (COF) COF is the most important component in the PDP module. SCRATCHING TEARING BEING PUSHED BENDING CHOPING 2.
Even a little imperfection of COF can make a serious screen problem. Precaution Handle with care (COF) COF is the most important component in the PDP module. SCRATCHING TEARING BEING PUSHED BENDING CHOPING 2.
Service Manual
Page 77
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. And this noise is problem replace the module . If there is different from Capacitor noise. ) NORMAL CRACKED 22 4. Exhaust tip Crack Confirm exhausting Tip and find Crack with naked eyes.
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. And this noise is problem replace the module . If there is different from Capacitor noise. ) NORMAL CRACKED 22 4. Exhaust tip Crack Confirm exhausting Tip and find Crack with naked eyes.
Service Manual
Page 84
from power on circuits of PDP module or power problem. If can not impress power even after replacing PSU, find out where the short occurred. * PSU makers. Trouble shooting. Power protection It is power protection when power is off automatically within 2~3 min. Power protection function protect the boards when occurred short on . DAEGIL PSU UNICON PSU 29 4.
from power on circuits of PDP module or power problem. If can not impress power even after replacing PSU, find out where the short occurred. * PSU makers. Trouble shooting. Power protection It is power protection when power is off automatically within 2~3 min. Power protection function protect the boards when occurred short on . DAEGIL PSU UNICON PSU 29 4.
Service Manual
Page 88
Trouble shooting. 3. Buffer IC 96 output 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 the ctrl b/d problem. So if there is a bar defect on screen, It may be appeared on screen when a specific part failed. 4.
Trouble shooting. 3. Buffer IC 96 output 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 the ctrl b/d problem. So if there is a bar defect on screen, It may be appeared on screen when a specific part failed. 4.
Service Manual
Page 89
Trouble shooting. Vertical defect (line) 1 line open or short with same distance. So replace the ctrl b/d. 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. This is due to COF IC inside short or adherence part of Ctrl b/d defect. MCM (Multi Chip Module) MCM can not be replaced separately. 4.
Trouble shooting. Vertical defect (line) 1 line open or short with same distance. So replace the ctrl b/d. 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. This is due to COF IC inside short or adherence part of Ctrl b/d defect. MCM (Multi Chip Module) MCM can not be replaced separately. 4.
Service Manual
Page 94
... => 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 Trouble shooting. If no problems, check 15V(Y,Z B/D) with GND, Î Forward value 0.3V, Reverse value infinite. 4. How to know after check one of them.
... => 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 Trouble shooting. If no problems, check 15V(Y,Z B/D) with GND, Î Forward value 0.3V, Reverse value infinite. 4. How to know after check one of them.