8-3
A0CA0TR
Check D522, C514 and their periphery circuit, and
service it if defective.
Check D513, R520, R530 and their periphery circuit,
and service it if defective.
No
Yes
Replace Q509.
No
LCD-5.5V is not output.
FLOW CHART NO.9
Is approximately -7V voltage supplied to the anode of
D522?
Is approximately -6V voltage supplied to the base of
Q509?
Yes
AL+5.5V is not output.
FLOW CHART NO.10
Is approximately 5.5V voltage supplied to the cathode
of D523?
Check if there is any leak or short-circuit on the
loaded circuit, and service it if defective.
Yes
Check D523, D524, C515 and their periphery circuit,
and service it if defective.
No
P-ON+9V is not output.
FLOW CHART NO.12
Yes
No
Is approximately 12V voltage supplied to the
collector of Q517?
Is approximately 10V voltage supplied to the
base of Q517?
No
Yes
Replace Q517.
Replace Q510.
P-ON+3.3V is not output.
FLOW CHART NO.11
Is approximately 5V voltage supplied to the collector
of Q510?
Yes
Check D523, D524, C515 and their periphery circuit,
and service it if defective.
Check D539, C522 and their periphery circuit,
and service it if defective.
Check Q508, Q520, D541, D542, P-ON-H2 line and
their periphery circuit, and service it if defective.
No
Is approximately 3.5V voltage supplied to the base
of Q510?
Yes
Check Q508, Q511, D526, P-ON-H2 line and their
periphery circuit, and service it if defective.
No
Summary of Contents for LT850-M26 - SERVICE
Page 13: ...4 2 A0CA0DC 2 Rear Cabinet S 1 1 Stand Assembly S 2 S 2 S 3 S 2 S 4 S 2 S 2 S 2 Fig D1...
Page 35: ...10 4 A0CA0SCP2 Power Supply 2 Schematic Diagram...
Page 36: ...10 5 A0CA0SCP3 Power Supply 3 Schematic Diagram...
Page 37: ...10 6 A0CA0INV Inverter Schematic Diagram...
Page 39: ...10 8 A0CA0SCF Function Schematic Diagram...
Page 72: ...LT850 M26 A0CA0EP 2010 06 15...
