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Old 29th Jul 2018, 8:17 pm   #12
mhennessy
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Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,244
Default Re: Hacker Herald RP37A repair

Quote:
Originally Posted by Herald1360 View Post
I expect Mr. Hennessy will be along soon.......
Fashionably late, as always

Good advice given so far. It might be worth checking T4, as that can cause strange faults.

It's possible the output devices are leaking - especially if they've been over-heated for some time. To test for this, temporarily short the two bases together. The quiescent current (via the test link) should drop to nothing in this state - if not, try replacing the output devices.

Good luck,

Mark
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