8-2
A0CF0TR
Replace Q501.
INV+16V is not output.
FLOW CHART NO.5
Is approximately 17.5V voltage supplied to the
collector of Q501?
No
Yes
Yes
Check D504, D505, C503 and their periphery circuit,
and service it defective.
Is approximately 17V voltage supplied to the base
of Q501?
No
Check Q504, Q505, D506, D507, P-ON-H1 line and
their periphery circuit, and service it defective.
P-ON+5V is not output.
FLOW CHART NO.7
Yes
Yes
No
Is approximately 6V voltage supplied to the base of
Q518?
AL+3.3V is not output.
FLOW CHART NO.6
Yes
No
Is approximately 6V voltage supplied to the collector
of Q521?
Check D525, C516 and their periphery circuit, and
service it if defective.
Check D525, C516 and their periphery circuit, and
service it if defective.
Check Q508, Q520, D543, P-ON-H2 line and their
periphery circuit, and service it if defective.
Yes
No
Is approximately 4V voltage supplied to the base
of Q521?
Check D552 and their periphery circuit, and
service it if defective.
Replace Q521.
Is approximately 7V voltage supplied to the collector
of Q518?
Replace Q518.
No
Summary of Contents for LT850-M32 - SERVICE
Page 13: ...4 2 A0CF0DC_rev 2 Rear Cabinet 1 Stand Assembly S 4 S 4 S 2 S 3 S 2 S 2 S 2 S 1 S 5 Fig D1...
Page 36: ...10 4 A0CF0SCP2 Power Supply 2 Schematic Diagram...
Page 37: ...10 5 A0CF0SCP3 Power Supply 3 Schematic Diagram...
Page 39: ...10 7 A0CF0SCF Function IR SENSOR Junction Schematic Diagram...
