1
Check the 13VA Line.
2
Check the Peripheral
2
Circuitry of ZD153.
-37-
Is about 5.5V put into the
Q153/Q155 Base?
Does the 13VA Line work normally?
Check or Replace the Q153/Q155.
YES
YES
NO
No 5V.
Is the Q156 Base “H”?
Is 5.3VA put into the Q153/Q155
collector?
Check the Power Control.
YES
YES
NO
NO
7. Power Circuit(SMPS)
(4) No 5V.
1
2
ELECTRICAL TROUBLESHOOTING -3/13