JVC LT-19DA9BJ User Manual

1-18 (No.YA683<Rev.001>)
LCD+3.3V is not output.
FLOW CHART NO.12
Is approximately 8V v
oltage supplied to the cathode of
D924?
Is approximately 4V voltage suppli
ed to the base of Q902?
LCD+13V is not output.
FLOW CHART NO.10
Is approximately 23V voltage supplied to the cathode
of D990?
Is approximately 13V voltage supplied to the base of Q922?
No
No
Ye s
Ye s
Check D990, C902 and their periphery circuit, and
service it if defective.
Check D905, C
905 and their periphery circuit, and
ser
vice it if defective.
Check R945 and their periphery circuit, and service it
if defective.
Ye s
No
Ye s
Replace Q908.
Ye s
Replace Q902.
Replace Q922.
See FLOW CHART No.9
No
Check D924, C917 and their periphery circuit, and
ser
vice it if defective.
No
Check D920, R930 and their periphery circuit, and
service it if defective.
No
LCD-6.8V is not output.
FLOW CHART NO.11
Is approximately
-12V voltage supp
lied to the anode of
D905?
Is approximately -
11V voltage supplied to the base of
Q908?
Ye s
Is approximately 18V voltage supplied to the collector
of Q922?
No
Check R953, R954, R955 and their periphery circuit,
and service it if def
ective.
Ye s
Is approximately 7
V voltage supplied to the collector
of Q902?
Ye s
Check D974, D975 and their periphery circuit, and
service it if defective.
No

JVC LT-19DA9BJ Specifications

General

Brand	JVC
Model	LT-19DA9BJ
Category	LCD TV
Language	English