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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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SAnyo DS19130, CH# 19130-00 Audio problem
Set came in no sound. Couldnt see any audio anywhere around the outputs,
Replaced IC101(LA7655N). Now at about half volume I do get a little audio, but not loud enough.and if I go up over half volume it completely goes away. Cant find any open res or bad caps(ESR). Dont have a schematic. Looks like someone else has replaced the two output trans. Both are NTE373, and check good with my fluke meter. NOW, I looked at the spec for nte 373 and it says compl to nte374, so should maybe one of these be a 374?. Thanks Charlie |
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SAnyo DS19130, CH# 19130-00 Audio problem
wrote in message .. .
Set came in no sound. Couldnt see any audio anywhere around the outputs, Replaced IC101(LA7655N). Now at about half volume I do get a little audio, but not loud enough.and if I go up over half volume it completely goes away. Cant find any open res or bad caps(ESR). Dont have a schematic. Looks like someone else has replaced the two output trans. Both are NTE373, and check good with my fluke meter. NOW, I looked at the spec for nte 373 and it says compl to nte374, so should maybe one of these be a 374?. Thanks Charlie A lot of Sanyo Tvs that have sound problems have a defective sound disciminator coil: Q: Volume level fluctuates up & down. Sound could be brought in via adjusting slug of T131. However, adjustment range was narrow and degraded later. A: Replace T131 Sound discriminator coil. (ST 181 S 6HC) Robert McPherson |
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