Atari SM124

POWER
CHART
Please check
the monitor
and
outlet
connections.
No
Check AC
fuse
(F901)
Replace AC fuse.
Yes
Trouble in
D901 -D904
Yes
No
or
Weak
Check inpu
t
of IC901.
+22V DC7 Yes
Check PS & P4
of
power PCB.
Yes
•
To the
main chart.
Check
output of IC901 & PIN
#2 of connector (P901).
Replace
IC901
or Q901.
Yes
•
To the main chart.
Replace
Power
Switch.
Replace
transformer.