8-2 PL10.10TR
See FLOW CHART No.7 <P-ON+7V is not output.>
TUNER+5V is not output.
FLOW CHART NO.9
Is approximately +
6.7V voltage supplied to the
collector of Q637?
Is approximately +6V voltage supp
lied to the
base of Q637?
No
Ye s
Ye s
Check D659 and their periphery circuit, and service
it if defective.
No
Replace Q637.
P-ON+3.3V(P-ON+3V) is not output.
FLOW CHART NO.10
Is approximately +
24V voltage supplied to Pin(2) of
IC621?
Is the "H" s
ignal inputted to Pin(7) of IC621?
No
Ye s
Ye s
Check C632, C1065, D632 and their p
eriphery
circuit, and service it if defective.
Check Q402, Q403, Q638, Q639, P-ON-H1 line,
P-ON-H2 line and their periphery circuit, and service
it if defective.
No
Replace IC621.
Check D1071, R1182 and their periphery circuit, and
service it if defective.
VT+32V is not output.
FLOW CHART NO.6
Is approximately +33V voltage supplied to the cathde
of D1070?
No
Ye s
Check C1056, D1070 and
their periphery circuit, and
service it if defective.
P-ON+7V is not output.
FLOW CHART NO.7
Is approximately +7V voltage supplied to the
cathde of D641?
Check C641, C1067, C1068, D641 and their
periphery circuit, and service it if de
fective.
Ye s
No
Check if there is any leak or s
hort-circuit on
the loaded circuit, and service it if de
fective.
See FLOW CHART No.7 <P-ON+7V is not output.>
P-ON+5V is not output.
FLOW CHART NO.8
Is approximately +7V voltage supp
lied to the
collector of Q636?
Is approximately +6V voltage supplied to the
base of Q636?
No
Ye s
Ye s
Check D659 and their periphery circuit, and service
it if defective.
No
Replace Q636.
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