[TechAssist] Pioneer SD-P50A5K shuts down
- From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 8 Mar 2004 12:59:00 -0500
Anyone have any input on this unit? I checked with both of the local ASCs
and neither had a SM that I could borrow, one loaned me one he thought might
be similar but it is not. Of course, the manual from Pioneer is
ridiculously expensive.
This one had a blown fuse, shorted Q208, Q207 (horizontal ckt). Replaced
these obvious problems and resoldered dozens of bad joints and it tries to
come up but shuts down. Flyback primary shows a ringing on pulse at startup
which made me look to the transformer, but it rings good and drive tests
good. Besides, it is also a split design with a seperate H out. Obvious
semis and caps that are resonable to test are ok. Yokes ring good and have
identical inductance and DCR. I hate to have to replace the board but at
the price of a manual plus the time and labor, it may be the reasonable
thing to do.
Any comments are appreciated. A scan of the schematic for the ps/deflection
board would be great.
Leonard G. Caillouet
Electronics World
Gainesville, FL
352-332-5608
352-332-5668 (fax)
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