Quote:
Originally Posted by Jon A.
Crap. I'll just leave it unplugged until I can dig into it.
I think I heard there are mods that make these things more reliable and allow them to use more common transistors.
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Be sure to let Sony know if you do find that mod - Sony never issued any kind of mod in the SG-613 or SG-608 sets. It's a robust design, made weak by bad solder, bad caps and lightning strikes that juice the sets.
I'll see if I have the original service manual still - most of these sets were a cap swap (4.7uF@160V and 250V - we kept them in stock...), a bad chroma chip CX1-something, or a bad solder connection in the sweep area (which led to the 608/613 failing), and the occasional open cathode in the CRT, 490BEBP22 in most of the 19"ers.
Even in the 90s, the SG-613 from Sony was about 7 or 8 bux, far cheaper than a 6LQ6 was for tube sets. Most problems occurred when folks went with just the SCS and didn't look further, like the damper diode (SID30-15, subbed by Sony to another number - I can look it up) or the bad solder. You could power one up, check for proper drive, and know if you had it fixed before installing the SG-613. I think I've posted the Sony Bulletin on how to properly check the SCS out of circuit..