Page 11 of 36
3.
Twist and tin the 4 ends.
4.
Insert one end of the red wire into the C9POS terminal from the component side
of the board and solder it on the solder side.
5.
Insert the accompanying black wire into the C9NEG terminal from the component
side of the board and solder it on the solder side.
Install the RLYDRV wire
Connect an 8.5” length of yellow wire into the RLYDRV eyelet. Insert it from the
component side, and solder it on the solder side. Note that the hole for this wire is kind of
large, so you’ll have the best results if you keep the wire and PCB quite still until the
solder sets.
Check your work
Look over the board to verify that:
1.
All components are soldered.
2.
No solder bridges are apparent.
3.
Polarity of the electrolytic capacitors is correct.
4.
Diode polarity is correct.
If everything looks good, you’re ready to install the power supply into your SCA-80 or
Stereo 80.
Disconnect the Old Power Supply and Power Amplifier
Unplug the power cord before proceeding. Wait 1 minute for capacitors to discharge.
1.
Remove the cover – unscrew and save a total of 5 screws:
a.
2 on the left side
b.
2 on the right side
c.
1 in the center of the top of the back panel.
2.
Remove the two sets of screws and nuts that hold the PC-19 brackets to the
bottom of the chassis. That will make it easier to remove the wires as needed in
the next steps.
