Beomaster 6000 issue

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pocok Posted: Tue, Aug 14 2018 8:10 PM

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I have a Beomaster 6000 for repair.Came in with shutting downs a few seconds after turn on.I did replaced all caps in power supply and output module. Also replaced the trimpots. Now it will stay on and verything seems ok. I did the output idle current and dc output voltage adjustments.

If I apply a sine wave channel 2 it is half of the amplitude than channel 1, but the input voltage is the same on both imput pins and B of TR102/202. Measuring voltages around not much difference can be seen just mV from one channel to other.

Following the sine wave the signal amplitude is half already on D204, compared to D104.

Any ideas?

Thanks,

Joe