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NAD 2100 in protection, -45V rail too high
NAD 2100 in protection, -45V rail too high
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Old 26th March 2020, 09:51 AM   #61
patrick101 is offline patrick101  Hong Kong
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Quote:
Originally Posted by Mackpappy View Post
So I have the +-12v at 405 and 407. I have 55 and 58v at c409 and c411, should be 1.8. At q433 and q435 I have 60v, should be 1.2. At r443, the q437 side has 18v, q439 side has 29v, should be .6. I have the 18v at c519 and c520. Any ideas at this point? Thanks for the help so far.
For this amp, please check if c421, c437 is short and measure the voltages in circles.
Please also measure the good channel voltages at the same place for a easy comparison.
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Last edited by patrick101; 26th March 2020 at 10:18 AM.
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Old 26th March 2020, 09:11 PM   #62
Mackpappy is offline Mackpappy
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I made the measurements on the amp that has not been recapped. It stays in protection mode and does not trip the speaker relays. I donít know what you meant by your last post. Could you clarify? Thanks!
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Old 27th March 2020, 05:55 AM   #63
patrick101 is offline patrick101  Hong Kong
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Quote:
Originally Posted by Mackpappy View Post
I made the measurements on the amp that has not been recapped. It stays in protection mode and does not trip the speaker relays. I donít know what you meant by your last post. Could you clarify? Thanks!
I just want to know that which amp we are testing and you just told me.

Ok, we deal with the not recapped amp first. Please check if c421, c437 is short or not and measure voltages from V1 to V7, thanks!
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