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3.
De-solder and label these wires from PC19:
a.
Red transformer wire connected to pin 8. Label it with the “X1” label.
b.
Red transformer wire connected to pin 9. Label it with the “X2” label.
c.
Wire connected to pin 1. Label it with the “TOC11” label.
4.
Cut the following wires close to the PC-19 circuit board. They won’t be used in
the upgraded amp.
a.
Wire connecting to eyelet 2
b.
Wire connecting to eyelet 4
c.
Wire connecting to eyelet 5
d.
Wire connecting to eyelet 6
5.
Cut the short (bare) wire that connects eyelet 7 to the ground lug. Cut it near the
ground lug.
6.
The PC-19 PCB is now free. Remove it from the chassis and set it aside. It won’t
be re-used.
SCA80Q
If you have an SCA80Q then follow these directions. The SCA-80Q front panel says “
4-
DIMENSIONAL AMPLIFIER
”. If you have a plain SCA80, without the Q, for
Quadaptor, then skip this section and go on to the SCA80 section.
7.
Cut and label these wires
where they meet the ground lug
that was fastened to the
mounting screw closest to C9.
a.
The ground wire that goes to the front panel of the chassis. Label it
“PGND”.
b.
The ground wire that goes to the negative terminal of C9.
