2017-03-31

Marantz SR7007 - not starting - rapidly blinking LED - defect transistor MMBT5551 in ASO protection circuit

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I always wanted to peek into an AV receiver even though I know that these devices are notoriously difficult to service due to their tight pa...
2 comments:
2017-03-27

Replacement of Panasonic Plasma parts (DAF30, 30F131, RFUH25, DG302, RJP30H2A, RF1501N)

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The original Panasonic parts for the NeoPlasma series 30 and 50 are slowly going extinct. As I am a big fan of those devices, I was spendin...
75 comments:
2017-02-22

Dell 2709W Ultra Sharp - blue power LED constantly on - unresponsive - main board reflowed

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I have a DELL 2410 and I like it a lot. When I saw the defect 2709 on eBay for a reasonable price, I thought I could try a monitor for a cha...
9 comments:
2017-02-05

LG 50LN5406 - flashes shortly - LED backlight defect

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I finally got my hands on one of the LG trouble children. The TV flashed the LG logo very briefly and then switched off again. The seller ha...
38 comments:
2017-01-17

Fake chinese GT30F131, RJP30H2A under the microscope

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In  this blog  I reported my experience with a chinese supplier. I came to the conclusion that both IGBT transistors were fake by measuring ...
3 comments:
2017-01-16

Panasonic TX-P50GT30 - 7 blinks - TNPA 5335 y-sustain - FGD4536TM used instead of 30F131, RJP30H2A

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I love my GT30 and when I found another one on eBay I grabbed it. It had the same 7 blink disease. See my  earlier blog post  about all the ...
3 comments:
2017-01-07

Backlight LEDs - types, sources, tools, techniques

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Please note that the links to the Aliexpress shop may be invalid at any time. This shop sometimes has the LEDs, other times it doesn't. ...