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PSS 1000 circuit please
PSS 1000 circuit please
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Old 13th December 2017, 12:22 AM   #1
SteveBrewster is offline SteveBrewster
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Join Date: Dec 2017
Default PSS 1000 circuit please

Hi to all from New Zealand, where we have to fix most things ourselves or pay considerable freight from other countries.


May I join by asking if anyone has access to a
PSS 1000 audio amp circuit?
I have one of these on my bench with a fault which I have tracked to a portion of the PCB but without the circuit it is difficult to know what should be going on there. I can compare the points with the other half but the 2 amps on the board are not symmetric, ie the tracks make it hard to compare accurately.
The amp blew the main fuse. When re-started burning electronics smell emanates. Track to 1w 680 resistor and too much voltage across it, but hard to see why.


Any leads wold be much appreciated


Thanks
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Old 13th December 2017, 12:36 AM   #2
Pano is offline Pano  United States
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Location: SW Florida
PSS 1000 circuit please
Welcome to the forum!
Best of luck with the PSS 1000
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Take the Speaker Voltage Test!
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Old 13th December 2017, 09:33 PM   #3
merlin el mago is offline merlin el mago
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Location: Catalonia - Europe
Welcome!
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Old 13th December 2017, 10:55 PM   #4
rayma is offline rayma  United States
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Quote:
Originally Posted by SteveBrewster View Post
The amp blew the main fuse. When re-started burning electronics smell emanates.
Track to 1w 680 resistor and too much voltage across it, but hard to see why.
See where the lower voltage end of the 680R goes. Maybe there's a shorted part there,
like an electrolytic capacitor, semiconductor, etc.
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Old 14th December 2017, 07:58 PM   #5
SteveBrewster is offline SteveBrewster
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Thanks rayma. Flying blind without a "map" but will keep trying
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