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Old 9th July 2011, 11:49 PM   #1
timwebb is offline timwebb  United States
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Default audio pipe

anyone knows what side the pos and neg rectifiers go on a 1500 audio pipe?
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Old 10th July 2011, 04:20 AM   #2
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Is the board marked?

If not and the rectifiers are common cathode and common anode, follow the trace from the center leg to the rail cap terminals. The common cathode (diodes facing inward) will have it's center leg connected to the positive terminal of the rail caps.
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Old 10th July 2011, 04:30 AM   #3
timwebb is offline timwebb  United States
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ok. i thought the power supply was fine when i was working on it cause it didnt over heat. i found some leaking transistors.and the center leg on the power supply transistors is 118v. im still getting that weird signal and the output card gets hot.
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Old 10th July 2011, 04:38 AM   #4
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118v? Are you sure your meter is working properly?
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Old 10th July 2011, 04:49 AM   #5
timwebb is offline timwebb  United States
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i meant 11.8v sorry
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Old 10th July 2011, 05:13 AM   #6
timwebb is offline timwebb  United States
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Old 10th July 2011, 05:29 PM   #7
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This image is useless without more information. If you need help, you have to provide as much information as possible.

What were the scope timebase and vertical amp settings?

What point in the circuit was this taken from?
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Old 10th July 2011, 07:01 PM   #8
timwebb is offline timwebb  United States
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volts/div .2 time/div 2us.
this was taken from the output inductor.
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Old 11th July 2011, 05:33 PM   #9
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Post a photo of the inside of the amp.
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