Commodore 128 repair resources
Power Supply Unit (PSU):
Looking at Commodore 128 case:
GROUND ——-4 3—– 9VAC
5———- 9VAC
+5VDC —–1 2—– NO CONNECTION
Or in mirror when looking at the plug of the PSU:
9VAC ——-3 4—– GROUND
5———- 9VAC
NO CONNECTION —–2 1—– +5VDC
Checking if your PSU is working:
– measure on pin 1 and 4: DC (in dutch: gelijkstroom) 5V
– measure on pin 3 and 5: AC (in dutch: wisselspanning) 9V