Commodore 1940 - Page 21

10. Power Supply Unit (P.S.U)
*( ): World trade
250Vp-p + n n
(400Vp-p) +.J U L
Trouble
in IC001
No
Trouble in
switching
power trans
former T001
Yes
Trouble in IC001,
R009, R012 etc.
Trouble in
P.S,!,!
Yes
Yes
>-_N_O-+~
~
No
No
No
No
Check the power cord
outlet, diode bridge
0001, starting capacitor
C010
Replace
R002
Trouble in Bridge diode
0001 or peripheral
device
Trouble in switching
power transformer T001
250Vp-p
(400Vp-p)
No
Trouble in switching
power trans T001
Trouble in switching
power trans T001
I PSU I
OK
Trouble in output
circuit IC002
T002, Q033 or
their ambient
circuit or Trouble
in H. Osc circuit
18