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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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JVC AV2749S No Sound at all,good picture though
I have a JVC AV-2749S, the problem is the audio, and there isn't any sound.
The source power for the TA8200AH IC is fine. The SAMS photo fact power Source [5] say it should be 20.0V, and I'm reading 15.7 at its source. The reading I get at the positive side of the input cap699 just before going into the VCC pin 9 of IC says 15.3V. So with that reading I know I have power at the input without taking a reading at pin 9, for this IC can operate between 10v-37v. There is no static sound like one would normally hear, I mean not even a trackle, faint sound of any kind. All other features and Functions are fine. Meaning the picture is great. I don't have The original remote, but the universal I'm using works all the on-board functions brightness, volume, scan channel and so forth. The only tools I have to work with are a DMM and logic probe. Any input would be excepted and appreciated. Thanks for your time. |
#2
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My info says to replace IC631(TDA1256).
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