tag:blogger.com,1999:blog-25608005.post5347937496358316773..comments2023-08-26T16:39:12.393+08:00Comments on DIY Electronics: Panasonic TH-P42X30K Plasma TV Power Board Fixleorickhttp://www.blogger.com/profile/12860324908477273661noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-25608005.post-34623289305010717322022-09-05T15:19:50.449+08:002022-09-05T15:19:50.449+08:00I don't have that think there are similer of d...I don't have that think there are similer of diode sb3100 and sb5100 so I just replace and it work again tqJameson Leehttps://www.blogger.com/profile/13415185959556703829noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-71678416036334753292018-10-28T13:50:58.806+08:002018-10-28T13:50:58.806+08:00Brilliant! Thank you so much for sharing this. I i...Brilliant! Thank you so much for sharing this. I installed a replacement B3100 but it didn’t work so put the G22 in and it works again.<br />Anonymoushttps://www.blogger.com/profile/02559869343915929753noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-44268366933062808242017-12-01T22:31:04.825+08:002017-12-01T22:31:04.825+08:00A friend brought a dead Panasonic TH-P42X30T. I su...A friend brought a dead Panasonic TH-P42X30T. I suspected the standby supply from the start and sure enough, there's no output from that section. Thanks to you, I was able to quickly isolate the problem. The B3100 diode *is* shorted here too. However, I don't have any power schottky diode with a voltage rating over 45V.<br />Did you happen to observe the actual peak reverse voltage with a 'scope after you fixed it? As it's a low-voltage supply, I was wondering if I could get away with a 45V diode. The failure could be due to marginal current rating rather than voltage. You're covered both ways with the FML-G225 but I don't have anything comparable.Zotin Knoreply@blogger.comtag:blogger.com,1999:blog-25608005.post-76328780720871712642016-12-12T12:38:52.822+08:002016-12-12T12:38:52.822+08:00Hi There,
I have a THP42X30A with the same symptom...Hi There,<br />I have a THP42X30A with the same symptoms as depicted in your blog. However my part that has let go is a different component. It is on the same foil side of the board U207 just above RJ31.<br />I am wondering if any one knows the value or has a parts list that they can advise me from.<br /><br />Thanks Clayton<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-25608005.post-81286079383510405072016-07-29T22:58:38.584+08:002016-07-29T22:58:38.584+08:00Trace from the input, P9
before D001 (bridge) 240V...Trace from the input, P9<br />before D001 (bridge) 240VAC shoud be there.<br />after D001 it will become between 300-400VDC<br />PFC_OUT and PFC_GND should be moreless the same (300-400VDC)<br />STB_Vin should be half than PFC_OUT against PFC_GND (half bridge)<br /><br />PROBE WITH CARE, P9 is connected directly to main.<br /><br />after that, hmmm... quite hard to tell.<br />What are IC001 and IC101 part no?<br /><br />try this... verify and check every diodes on the board (for short or open)<br />you might be able to find the problem.<br />I usually did it this way when too lazy to trace. :-)leorickhttps://www.blogger.com/profile/12860324908477273661noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-8181691503028870382016-07-29T17:21:56.653+08:002016-07-29T17:21:56.653+08:00Power Board : MPF6907 - N0AE5JK00006
https://driv...Power Board : MPF6907 - N0AE5JK00006<br /><br />https://drive.google.com/file/d/0BxcCyVEqlkCaOWdZYU5yUV9HTEk/view?usp=sharing<br /><br />https://drive.google.com/file/d/0BxcCyVEqlkCaM0E2bFkyX3dJeUk/view?usp=sharing<br /><br />https://drive.google.com/folderview?id=0BxcCyVEqlkCaa3gzZkZ3MlRQMFU&usp=sharing<br /><br />https://drive.google.com/folderview?id=0BxcCyVEqlkCaa1JpbzVCQWxzb0k&usp=sharing<br /><br />I have added additional pictures near diode D452 see folder near-diode in the above link.<br /><br />I have earlier diagnosed and found the power board to be defective according to the trouble shooting procedures in the manual. Even a panasonic technician confirmed this when he had a look into it.<br />I was told that the tv was working ok till about 11pm and was switched off by remote and left in stand-by state overnight and found in the morning the stand-by led was off. No response from remote or by power-on/off cycle. We hear three clicking noise when we switch on the tv that's all.Anonymoushttps://www.blogger.com/profile/17642430956217293364noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-56126068539372216072016-07-24T21:09:22.234+08:002016-07-24T21:09:22.234+08:00Your power board is totally different from mine. B...Your power board is totally different from mine. But what I can guess is, the similar diode (like my B3100 diode) should be located here (refer image below)<br /><br />https://1.bp.blogspot.com/-cJJIfKrddOE/V5S86Wc4hNI/AAAAAAAAC3s/QWhxjdodruQEZejoTfbhqLQdDtFvJA-4gCLcB/s320/Snap%2B2016-07-24%2Bat%2B21.01.26.jpgleorickhttps://www.blogger.com/profile/12860324908477273661noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-83601880699576114282016-07-23T17:38:51.931+08:002016-07-23T17:38:51.931+08:00This is power PCB of th-p42x30d. Can you tell me w...This is power PCB of th-p42x30d. Can you tell me where the B3100 and FAN675 pwm are located.I am finding it hard time to locate as the service manual does not mention power board schematic in detail or component list of p board.<br />https://drive.google.com/file/d/0BxcCyVEqlkCaX2NVOHBLaEdiSkE/view?usp=sharing<br />https://drive.google.com/file/d/0BxcCyVEqlkCaazEzX1JqWTE4a28/view?usp=sharing<br />Anonymoushttps://www.blogger.com/profile/17642430956217293364noreply@blogger.comtag:blogger.com,1999:blog-25608005.post-82344728007972260652014-07-11T14:40:19.047+08:002014-07-11T14:40:19.047+08:00Good job fixing the power supply, it is often the ...Good job fixing the power supply, it is often the problem in modern TV sets, a single cheap component failing in the power supply because it was slightly underdimensioned for the current or voltage.Mads Barnkobhttp://www.kaizerpowerelectronics.dknoreply@blogger.com