Help on PV2000

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rubli
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Joined: Wed Jan 11, 2023 9:44 am

Help on PV2000

Post by rubli » Wed Jan 11, 2023 9:57 am

Hello
I've got a schematic for this amp pv2000, though connections of the main transformer is missing.

I have a problem, I had to replace twice the 7815 regulator, on investigating, I have found that I have a resistance of about 65 ohm between the ground of the regulator, and the ground of the amplifier.
the resistors between +v15 to ground and -v15 to ground were burnt, and replaced (47 ohms each), I suspect there is a potential between grounds, making the regulator smoke.

any hint will be appreciated

thanx

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