Pioneer SX-1980 recap and restoration thread!
- Thread starter mattsd
- Start date
anderslober
Yikes...not again!
Very nice! Keep posting pictures as you go along.
The sx 1980 has eluded me for some time.............just can't seem to find one for my collection. Unless of course you pay a ba-zillion bucks!
The sx 1980 has eluded me for some time.............just can't seem to find one for my collection. Unless of course you pay a ba-zillion bucks!
realjimjim
Well-Known Member
Jim's SX-1250 is done and will be shortly on it's way to him, so I can now get to this monster. :thmbsp:Before pics of the boards being recapped to come shortly, I'm going to be starting on it later this afternoon.
As The Pointer Sisters once sang:
https://www.youtube.com/watch?v=rQqwG_rQx7A
And here's The (little) Monster doing its thing after Magic Matt did his thing!
https://www.youtube.com/watch?v=Z-ja959dIOE
You gotta love this guy . . . Mr. Magic Matt Wonderful!
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realjimjim
Well-Known Member
If you don't mind me butting in here . . . a few months ago I got a SX-1280 back from another member . . . It got crushed and lucky for me Matt was able to semi straighten out the chassis.
And from then on I made what Matt calls: "Jim's Coffin."
My UPS man hates it and we joke about my "coffin" . . . but so far so good.
tsd71
RIP Tom Petty
Jim's SX-1250 is done and will be shortly on it's way to him, so I can now get to this monster. :thmbsp:
realjimjim
Well-Known Member
double boxed, with plenty of styrofoam, still got crushed.
My big mistake: I marked all over the outside "Fragile!" "Electronics!"
My UPS guy told me (later) that that was a real bad move.
tsd71
RIP Tom Petty
nokian93
Member
That is ridiculous!! I wished they would hold people accountable for damaging these beautiful goods!
mattsd
Super Member
Here are some more photos! Sorry for the long delay, I've had a lot of things going on.
EQ amp board before
EQ amp board after
Flat amp board before
Flat amp board after
Next up, the biggest and hardest board of them all, the power supply board, then the two amp boards and then it will be time to rock and roll!
EQ amp board before
EQ amp board after
Flat amp board before
Flat amp board after
Next up, the biggest and hardest board of them all, the power supply board, then the two amp boards and then it will be time to rock and roll!
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mattsd
Super Member
And here are the final boards!
Power supply board before
Power amp board before
Power amp board after
Power supply board after (Note: I miscounted the caps in the list for this board I created and came up two short, so you can see two caps that are still original, I've got those on order. I edited the OP with the added caps)
'
Coming up, power up and first impressions of the recapped sound! Also cleaning and polishing it as well!
Power supply board before
Power amp board before
Power amp board after
Power supply board after (Note: I miscounted the caps in the list for this board I created and came up two short, so you can see two caps that are still original, I've got those on order. I edited the OP with the added caps)
Coming up, power up and first impressions of the recapped sound! Also cleaning and polishing it as well!
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I like to replace those two axial caps at the left with radial caps to get them out from under the heatsink. And the 35V zener should be replaced with a series pair of 18V and 17V zeners (suggested by Pioneer in one of their service bulletins). Then you experiment with large value resistors in parallel with R222 and R223 to tweak in the voltage to the desired 80V.