FUNAI MAGNANOX BZV420MW8 Service Manual page 28

FLOW CHART NO.6
P-ON+9V is not outputted.
Is 12V voltage supplied to the collector of Q1055?
Is 10V voltage supplied to the base of Q1055?
Replace Q1055.
FLOW CHART NO.7
P-ON+5V (1, 2) is not outputted. (P-ON+9V is outputted normally.)
Is 5V voltage supplied to the collector of Q1056?
Is 12V voltage supplied to the collector of Q1057?
Is the "H" pulse inputted into the base of Q1056?
Is the "H" pulse inputted into the base of Q1057?
Replace Q1056 or Q1057.
FLOW CHART NO.8
AL+18V is not outputted.
Is the supply voltage 44V fed the cathode of D1013?
Check D1083, R1092, R1095, and service it if defective.
FLOW CHART NO.9
P-ON+11V is not outputted.
Is 12V voltage supplied to the emitter of Q1102?
Is 10V voltage supplied to the base of Q1102?
Replace Q1102.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No Check D1014, D1017, C1012, and their
periphery, and service it if defective.
No
Is the "L" pulse inputted to the base of Q1052?
No
Replace IC1501.
No
Check D1015, D1016, L1013, C1017, C1021,
and their periphery, and service it if defective.
Check D1014, D1017, C1012, and their
No
periphery, and service it if defective.
No
Check R1057 and their periphery, and
service it if defective.
Check R1065 and their periphery, and
No
service it if defective.
No Check D1013, C1013 and their periphery, and
service it if defective.
No Check D1014, D1017, C1012 and their
periphery, and service it if defective.
No
Is the "H" pulse inputted to the base of Q1103?
No
Replace IC1501.
1-11-2
Yes
Check Q1052, D1052 and their
periphery, and service it if defective.
Yes
Check Q1103, R1106 and their
periphery, and service it if defective.
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