Does anyone have service info-circuit diagram for this unit. I have one with distortion on both channels.
I don't have the manual, but I would first check the positive and negative power supply voltages going to any audio op-amps (on the output board), then the op-amps themselves. Should be something like +/- 15 volts.
Hi Jonnysan, as per my previous message, I have now replaced the suspect IC and normal clean audio output is restored.
Thanks for the reply Johnnysan, yes., I have checked, the power rails look like they are ok. I worked on the unit yesterday, I found an IC (TC4052BP) was running hot, it is an analog multiplexer. I think in this case it is being used as source selector (CD or iPod) into the output amplifier stage. On checking using a scope, I can see clean audio going in but it is distorted at the output of the chip (both channels). I have ordered a couple in. I will let you know how it goes.
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