Quad 44 quite warm to touch

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07-Jun-2019 04:29 PM

jonintaiwan

jonintaiwan

Posts: 7

Just finished revision of Quad 44, mostly seems okay now, although I have one or two faults in the input stage, such as disc input only working on one channel. I shall probably have to take the lid off and check my soldering.

Anyway, the Quad 44 seems to get quite warm to touch, which surprises me, as both the Quad 33 and 34 stay as cool as a cucumber when I use them. So I just wondered if this is cause for concern, or normal for the 44?

 Thanks

Jon

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08-Jun-2019 08:57 AM

EJP

EJP

Posts: 1605

No it is not normal. Sounds like you have a DC short somewhere. Try removing the disc board that doesn't work and see if that fixes the heat problem. If it doesn't, try removing the others one by one. If one of those removals fixes it, there's your culprit, otherwise it is on the motherboard or the tone board. Also measure the DC rail voltages, should be about 15V each.
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08-Jun-2019 11:05 AM

jonintaiwan

jonintaiwan

Posts: 7

Thanks, that's useful to know!

Time to remove the lid again...

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