Hi, I'm trying to repair an SX-434 for a friend.
As of now all the outputs are blown. Completely my fault. Long story short, they had to be replaced. Original parts were NLA, so I replaced the Sanyo B507D (PNP) and D313D (NPN) with 2N6042 (PNP) and 2N6045 (NPN), by matching up specs. I found parts recommended across the web but they were all expensive, so I decided to match them up myself.
So I soldered them all in, and here's my first question:
All the collectors are connected together at the heat sink. I can't recall if there were isolation pads or not (I had to set the project aside for a few months and just got back to it). I don't see myself throwing them out, but there aren't any. Should there be?
I don't see them all joined together in the schematic, but I'm hoping someone here will be fimiliar with the type of design and able to tell.
Service manual is easily available (schematics at the end):
Here
or here
As of now all the outputs are blown. Completely my fault. Long story short, they had to be replaced. Original parts were NLA, so I replaced the Sanyo B507D (PNP) and D313D (NPN) with 2N6042 (PNP) and 2N6045 (NPN), by matching up specs. I found parts recommended across the web but they were all expensive, so I decided to match them up myself.
So I soldered them all in, and here's my first question:
All the collectors are connected together at the heat sink. I can't recall if there were isolation pads or not (I had to set the project aside for a few months and just got back to it). I don't see myself throwing them out, but there aren't any. Should there be?
I don't see them all joined together in the schematic, but I'm hoping someone here will be fimiliar with the type of design and able to tell.
Service manual is easily available (schematics at the end):
Here
or here
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