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