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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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sony tv
Can anyone help me with my old tv?
It's a Sony kv-2531a set, about 10 years old. It had bad field linearity, fixed by replacing c531-c532. Few days after the remote stopped working. Replaced with a new one ( how expensive by sony!) but still faulty. I had a look to the schematics, the receiver itself cannot be tested, AFAIK, power, 5v, is correct, on output pin 2 of the ir receiver I get a +5v when idle. All resistors involved fron the ir rcvr output to the big chip (IC001, SDA2083) are ok. I also get a slight frequency shift of the picture, very little. All my suspects point to the chip that looks like acting for both troubles. Can anyone suggest me more checks before I replace the (expensive) chip and may be swear on having best bought one of this corean use-and-throw sets? Thanks |
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