jcsul
Member
Hi guys, long time lurker, but I finally made an account to post for some help.
So I'm finally getting around to trouble shooting my pioneer SX1980. Everything appears to work properly except I'm getting no sound. The speaker protection relays cut on as soon as I fire up the unit. So I got the service manual and started taking some voltages. I'm getting about 108v on the + rail of the PSU, where it should be 80. The - side is fine. Then I notice that the transistor q212 (c1318 written on the side) is literally broken in half.
So my question is, what are my options for repair? I know I need a new transistor, but are c1318 even produced any more, is there a drop in replacement, what other considerations should I take into account before I begin surgery? Before you guys chime in, I'm familiar with working with high voltages.
I'm no pro, but I know when to stop working on something if there is a chance I'm going to ruin the work piece or fry myself haha. So no worries, I won't hurt myself or this beast of a receiver.
Here's a link to some shots of the PSU board and a screen shot of the PSU schem. If any one needs a higher quality image of the PSU schem I can email you the .pdf
http://m.imgur.com/a/5Pa35
Thanks for any help guys.
So I'm finally getting around to trouble shooting my pioneer SX1980. Everything appears to work properly except I'm getting no sound. The speaker protection relays cut on as soon as I fire up the unit. So I got the service manual and started taking some voltages. I'm getting about 108v on the + rail of the PSU, where it should be 80. The - side is fine. Then I notice that the transistor q212 (c1318 written on the side) is literally broken in half.
So my question is, what are my options for repair? I know I need a new transistor, but are c1318 even produced any more, is there a drop in replacement, what other considerations should I take into account before I begin surgery? Before you guys chime in, I'm familiar with working with high voltages.
I'm no pro, but I know when to stop working on something if there is a chance I'm going to ruin the work piece or fry myself haha. So no worries, I won't hurt myself or this beast of a receiver.
Here's a link to some shots of the PSU board and a screen shot of the PSU schem. If any one needs a higher quality image of the PSU schem I can email you the .pdf
http://m.imgur.com/a/5Pa35
Thanks for any help guys.