8-3
A0CN0TR
PANEL+12.5V is not output.
FLOW CHART NO.10
Is approximately 15V voltage supplied to the cathode
of D612?
No
Yes
Yes
Check D612, D620, C613 and their periphery circuit,
and service it if defective.
Check D613, C618 and their periphery circuit, and
service it if defective.
Check D640, R657, R658 and their periphery circuit,
and service it if defective.
No
Yes
Replace Q611.
Replace Q615.
No
LCD-5.5V is not output.
FLOW CHART NO.11
Is approximately -10V voltage supplied to the anode of
D613?
Is approximately -10V voltage supplied to the base of
Q611?
Yes
Is approximately 13V voltage supplied to the base
of Q615?
No
Check D664 and their periphery circuit, and
service it if defective.
PANEL+25.6V is not output.
FLOW CHART NO.9
Yes
No
Is approximately 32V voltage supplied to the cathode
of D618?
Is approximately 32V voltage outputted to the collector
of Q612?
Yes
Check D617, D636 and their periphery circuit, and
service it if defective.
Check D618, D623, C616 and their periphery circuit,
and service it if defective.
No
Check Q612, Q613, P-ON-H1 line and their periphery
circuit, and service it if defective.
Summary of Contents for LT850-M22 - SERVICE
Page 13: ...4 2 A0C72_73DC 2 Rear Cabinet 1 Stand Assembly S 3 S 2 S 2 S 2 S 2 S 2 S 4 S 5 S 1 Fig D1...
Page 36: ...10 4 A0C70SCM2 Main 2 Schematic Diagram...
Page 37: ...10 5 A0C70SCM3 Main 3 Schematic Diagram...
Page 38: ...10 6 A0C70SCM4 Main 4 Schematic Diagram...
Page 39: ...10 7 A0C70SCF Function Junction Schematic Diagram...
Page 40: ...10 8 Jack Schematic Diagram A0C70SCJ...
Page 75: ...LT850 M22 LT851 M22 A0C70EP A0C71EP 2010 06 03...
