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Trouble Shooting Chart
Startpoint symptom:
Dead
~
No
Check Power primary circuit
Is the fuse OK ?
Q313, Q312, L312, D311, D315,
PS501 , R503, D501 , IC501 ,
Yes
C501 , C502, C307, C315
v
Check voltage on both ends of
Ov
Check Power primaty circuit
C307
-
SW501 , L501 A, F501 , R508A,
R512A, IC501, AC Cord
I
I
250V-400V
v
Check voltage on both ends of
Ov
C521
w
1OV-20V
T501 , D521 -D524, C521
Check voltage on pin 27 of IC701
4
IC701 , Q521 , R523, D526,
C522, C729, C721 , C722,
L
I
1
I A1101, L703
I
+5V
Observe voltage B2(+24V) on both
ends of C365 when turning on TV
set with RC transmitter.
The voltage rise up to 10V-24V once
and then fall down to OV
immediately.
I
Yes
It operates protection circuit
Go to next page
No
Check Power primary circuit
Q313, Q312, Q311, C317,
R324, R320, R321 , R322, T311 ,
D315, C314, R319
Check stand-by circuit
Q792, Q793, D361 , R792, IC701
-41-
AAl -A
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