Discussion in 'Pioneer Audio' started by ranukic, Aug 15, 2017.
Check this out. My Head Amp Unit is p/n W21-001 but your manual has a W15-049. Strange stuff!
i have 3 manuals here . all a bit different
head amp is w21-001 in first one i posted . you read it wrong
sx990 is W15-049
Gotcha! Thanks again
I pretty much went through this with my Allied 495. Its mostly an SX-1500TD, using the head amp from an SX-990 and the older MPX board that you have. The recap list I came up with is here, you'll have to figure what goes in your head amp and mic amp though.
"hiccups" in Allied 495 (Pioneer) FM tuner
I used UF5408 diodes in mine. It had 2 originals and 2 non-original. Both crossed to a 3 amp part, so I used the UF5408 that I had on hand as those are also 3 amp.
Pete; Probably got it from kallhovde PIONEER site. It has the schematics the OP needs with the correct board numbers.
Site link; http://www.kallhovde.com/pioneer/Pioneer/Main scan page.html
SX-1500TD Schematic link: http://www.kallhovde.com/pioneer/sx-1500td-s.pdf
Owners/Service Manual link; http://www.kallhovde.com/pioneer/sx-1500td-om-sm.pdf
James; Suggest you bookmark the main link for future 1970's PIONEER restorations/repairs.
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