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Orion HCCA 2100 no rail voltage.
Orion HCCA 2100 no rail voltage.
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Old 4th April 2019, 05:07 AM   #121
Perry Babin is offline Perry Babin  United States
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Those probes are cheaper on ebay. Find a US seller. You can buy 4 for about $20.

Don't buy from anyone who claims that those are P6100 probes.

If it's OK out of the sink, look for something shorting to the sink.
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Old 4th April 2019, 05:32 AM   #122
Chopperbuilder is offline Chopperbuilder  United States
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I'm confused. I apparently didn't understand your question in post #119. So to maybe better answer it, the DC voltage is exactly the same in or out of the sink.
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Old 4th April 2019, 06:05 AM   #123
Perry Babin is offline Perry Babin  United States
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Does anything other than the PS FETs heat up if not clamped tightly to a heatsink?
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Old 4th April 2019, 06:43 AM   #124
Chopperbuilder is offline Chopperbuilder  United States
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With the lamp connected none of the PS FET's are heating up. However the five 6488's and two voltage regulators circled in the photo are heating up.
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File Type: jpg 20190331_000912-3.jpg (926.7 KB, 28 views)
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Old 4th April 2019, 07:24 AM   #125
Perry Babin is offline Perry Babin  United States
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The voltage regulator heating is likely normal.

Its not normal for the 6488s to heat up in this amp.

Are you 100% sure that the DC voltage across ALL 10 emitter resistors on that side of the amp is 0.000v DC?
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Old 4th April 2019, 05:47 PM   #126
Chopperbuilder is offline Chopperbuilder  United States
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There are now a several emitter resistors that are not reading 0.000v DC, see attached photo
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File Type: jpg 20190331_000912-4.jpg (923.7 KB, 27 views)
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Old 4th April 2019, 06:08 PM   #127
Perry Babin is offline Perry Babin  United States
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The transistor with the emitter reading 0,032 is likely defective.
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Old 4th April 2019, 08:21 PM   #128
Chopperbuilder is offline Chopperbuilder  United States
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Is the MPSU57 circled in the picture the transistor that you're thinking is likely defective?
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File Type: jpg 20190328_152538-1.jpg (738.1 KB, 26 views)
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Old 4th April 2019, 08:25 PM   #129
Perry Babin is offline Perry Babin  United States
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No. The output.
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Old 4th April 2019, 08:33 PM   #130
Chopperbuilder is offline Chopperbuilder  United States
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That is a photo of the audio section of the amp. Will you please show me which transistor you are talking about?
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