8-4
A0CN0TR
AL+5.5V is not output.
FLOW CHART NO.12
Is approximately 5.5V voltage supplied to the cathode
of D616?
Check if there is any leak or short-circuit on the
loaded circuit, and service it if defective.
Yes
Check D616, C614 and their periphery circuit, and
service it if defective.
No
AL+7.5V is not output.
FLOW CHART NO.15
Is approximately 7.5V voltage supplied to the cathode
of D637?
Check if there is any leak or short-circuit on the
loaded circuit, and service it if defective.
Yes
Check D637, C628 and their periphery circuit, and
service it if defective.
No
P-ON+11V is not output.
FLOW CHART NO.14
Yes
No
Is approximately 15V voltage supplied to the
collector of Q609?
Is approximately 12V voltage supplied to the
base of Q609?
No
Yes
Replace Q609.
Replace Q606.
P-ON+3.3V is not output.
FLOW CHART NO.13
Is approximately 5.5V voltage supplied to the collector
of Q606?
Yes
Check D616, C614 and their periphery circuit, and
service it if defective.
Check D612, D620, C613 and their periphery circuit,
and service it if defective.
Check Q607, Q610, D639, P-ON-H2 line and their
periphery circuit, and service it if defective.
No
Is approximately 3.5V voltage supplied to the base
of Q606?
Yes
Check Q607, Q610, D671, P-ON-H2 line and their
periphery circuit, and service it if defective.
No
Summary of Contents for LT850-M19 - SERVICE
Page 13: ...4 2 A0CN0DC 2 Rear Cabinet 1 Stand Assembly S 3 S 2 S 2 S 2 S 2 S 2 S 4 S 4 S 1 Fig D1...
Page 36: ...10 4 A0CN0SCM2 Main 2 Schematic Diagram...
Page 37: ...10 5 A0CN0SCM3 Main 3 Schematic Diagram...
Page 38: ...10 6 A0CN0SCM4 Main 4 Schematic Diagram...
Page 39: ...10 7 A0CN0SCF Function Junction Schematic Diagram...
Page 70: ...LT850 M19 LT851 M19 A0CN0EP A0CN1EP 2010 05 25...
