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Hi. I have repaired this amp and smps. I works and I have run it for about an hour today.
Thing that worries me is that Im getting 200mV dc offset on output. I can actually hear it as a " hum" on the speaker.
I did not re-adjust bias pot after repair. Im not getting crossover dist. Can an over-biased amp have more Dc offset?
I have already replaced long tail pairs. I even matched them. Still Dc offset.
Any thoughts?
Thing that worries me is that Im getting 200mV dc offset on output. I can actually hear it as a " hum" on the speaker.
I did not re-adjust bias pot after repair. Im not getting crossover dist. Can an over-biased amp have more Dc offset?
I have already replaced long tail pairs. I even matched them. Still Dc offset.
Any thoughts?
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