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Pioneer SX 1250 Week Points

Ben Rothman

Ben Rothman

Active Member
Hello, I recently got (as far as I can tell) an all original pioneer sx 1250 in great condition. I already own a restored pioneer sx 1010. The 1250 is fully functional, my question is, are there any week points of the 1250? I know on the 1010 the power supply is a big issue.
 
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A little more heat sink area for the AWR-106 stabilizer assembly would get that area running a bit cooler.. It's kinda space limited by the proximity of the big caps, but guys have made use of the v shaped area in between the big caps. Then all the usual stuff. Problem transistors, drying out e-caps, heat sink greasing, old trimpots, beef up the discharge and relay drive transistors in the protect circuit, all parts of the usual lists.
 
Prime suspects I’ve seen on failed units are the power supply regulators and the power stabilized.

Rebuilding those two boards is my first target for repair before rebuild.
 
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