Started my attempt to restore a Pioneer A-60 I picked up. Let's say it was in sad shape...! I've cleaned up the outside and "fixed" an alps micro switch in the switch assembly. I am more interested in having a phono input than aux so I just swapped them out, since they are NLA. Started a recap and found some issues! Here are some pics.....
I don't know what caused the corrosion on the last pic. I'm getting opens across the resistors, I don't know how to identify the diode.. Looking at the service manual all I can figure out is that it should be a zener. Numbers are practically unreadable on the xray views of the boards.. it didn't photocopy very well at all.
I pulled the heatsink and outputs and cleaned and applied new thermal paste. It has gotten really hot in there in a couple of spot. There are plastic guides for the outputs where the pins go through the board and the left channel ones were in three separate pieces and center piece was warped...
Interesting, but the amp was playing... !
I don't know what caused the corrosion on the last pic. I'm getting opens across the resistors, I don't know how to identify the diode.. Looking at the service manual all I can figure out is that it should be a zener. Numbers are practically unreadable on the xray views of the boards.. it didn't photocopy very well at all.
I pulled the heatsink and outputs and cleaned and applied new thermal paste. It has gotten really hot in there in a couple of spot. There are plastic guides for the outputs where the pins go through the board and the left channel ones were in three separate pieces and center piece was warped...
Interesting, but the amp was playing... !
