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3-3
(4) No 5.2 A (TO AVCP, BIAS) (5) No 10V
Is there voltage (about 0V)
at Q157 collector.
NO
NO
YES
YES
Is Q170 normal?, Is there about
13.5V at Q107 Base?
Check/ Replace
D155, D156, D157/\.
Replace D106.
NO
Replace Q153.
Replace Q157.
No 5.2V
Is D106 normal?
Replace D109
No 10V
Is D109 normal?
YES
Is Q153 normal?
YES
Check/
Replace Q156
YES
NO
Check/ Replace
Q107, ZD103
NO
SECTION3 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE