I have searched without success so far, Can anyone help?
Sony Amp (1970s)
Sony Amp (1970s)
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Re: Sony SA-88 Schematics Wanted
that should be so simple you don't even need schematics.
also you can take advantage of fact that those are 2 same circuits for 2 channels.
if one channel works ok then it can help you troubleshoot other.
other than that you're left with power supply...and pots... -
Re: Sony SA-88 Schematics Wanted
It is something so simple that I felt embarassed to ask. It is the value of the lamp for the stereo signal which is missing as I removed it many years ago for an ID but now is lost.
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Re: Sony SA-88 Schematics Wanted
turn it on,tune to a stereo signal,measure voltage.
iirc the mpx chip can only source about 30 ma to drive the lamp.
might be a job for an led?Comment
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Re: Sony SA-88 Schematics Wanted
Sorry, It was a ST-88 a tuner. (I used to have an amp)Comment
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Re: Sony SA-88 Schematics Wanted
kc's answer still very much valid.
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Re: Sony SA-88 Schematics Wanted
The stereo output for the indicator light is 15V when full signal. I found a led from a portable tv. I have had no luck finding two 8V x .15w dial light bulbs.Comment
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Re: Sony SA-88 Schematics Wanted
uses 2 lights?
try 2 led's in series and a 470 ohm resistor.Comment
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Re: Sony SA-88 Schematics Wanted
I found the bulbs here http://www.lampspecs.co.uk/Light-Bul...150MA-1-2W-E10Comment
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