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Old 02-18-2018, 11:49 AM   #37
R_J
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Join Date: Jun 2012
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Default Re: Philips FR-740 working but no audio output

That voltage on the collector of 7309 is way too low, the schematic says it should be -34.5 volts,
Whats on the base of 7902, it should be -35 volts
7309 could be leaky e-c killing that voltage
Like said about the other stk486-430, it seems to only take a 2 volt difference on the ccc line to turn it on or off.
You have -40v on ccc line, the schematic says it should be -33.5v

Last edited by R_J; 02-18-2018 at 11:56 AM..
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