SX-28A Problem - Need Help
 

This is a question for a SX-28A expert out there.

Well, I've really done it now. Elmer has struck.

I had a wax cap heating up in the RF Deck and so I went in and replaced
the bad caps and resistors in the 1st, 2nd, and mixer boxes. Not fun. I
really didn't want to, but I didn't think it was going to last long. I
marked all the wires as I dis-assembled thinking it would be easy to
re-assemble.

When I got to the point to hook up the wires connecting to the 4 pins on
the top of each metal box I found the wire marker fell off a blackish
wire. It looks like it should connect to the mixer box pins, but I
don't know which one. It doesn't seem long enough to reach much of the
other boxes but I suppose it's possible to get to the 2nd stage maybe.

The "mystery wire" is blackish color, and I think it goes to a terminal
strip connector. A 1K resistor goes from that terminal strip connector
to the 6L7 pin 4. I think it should connect to 1 of the 4 pins on top
of the metal mixer box but I can't figure out which one.

Does anyone have a diagram of the wire connections to these boxes?


As SX-28A is on side with IF cans on top, from bottom of chassis the
view looks like this: (Oscillator box not shown)


==Front Rear ====

1 2 3 4 5 6 7 8 9 10 11 12
| | | | | | | | | | | |
|--------------------| |----------------| |------------|
| Mixer Box | | 2nd | | 1st

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