[TechAssist] Re: Sanyo DS25630 Chassis 25630-02 NO Sound
- From: John Mielke <maintv@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 20 May 2002 10:09:16 -0600
It is pretty common for the audio output IC (TDA7231A) to have leakage
to the mute line and will cause no sound even in a stereo TV, muting
both audio outs. If that's not it, check the resistors around IC101
(LA7673) and T131 off pin 4, otherwise change IC101. John.
Mian TV
longmon, Co 80501
303 776 6955
Hermantvr@xxxxxxxxxxxxx wrote:
> This Sanyo DS25630 has no sound. Have 15v on pin 1 of I001. There is no
> sound coming in on pin 4. Traced sound path back to pin 6 of IC101 (LA7673)
> and there was no sound there. The only place I can find audio is on pin 1 of
> IC101 Lifted Pin 6 and there was still no sound on the pin itself. Replaced
> IC 101, and still no sound. Have 3.7 volts on pin 6 of IC101 and 3.9 with pin
> 6 liftedshould be 5.1 volts. Any help will be appreciated.
> Tommy Herman
> Hermant TV
> Taylorsville NC
>
>
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