Table of Contents
Advertisement
Trouble Shooting Chart
Startpoint symptom:
No picture-sound
OK
Is video signal observed on Q1 22-
emitter
"
"~
I
Yes
Is video signal observed on Q1 35-
base
Yes
v
I
F
I
Hc)riz.
Check sound trap circuit
R143, D120-D123,
R138, R139,
L1 25, L1 26, Xl 24-X127, R148,
R149
Is video signal observed on Q1 34-
l!!!!-1
No
Q135, Q134, Q132, R144,
base
-
R140, R142, R151 , R152, L136,
C145, C147
.
I
*
Yes
m
v
Is video signal observed on pin 13
of Icl 01
'w
"~
I
1
I
1
I
Yes
Check voltage on pin 16 of IC101
"~
I
Ov
Check voltage on pin 17 of IC101
+
C206, C712, R721 , R718
Check voltage on pin 25 of IC101
':~
3V-7V
R231 , R232, Cl 792, R1792,
R1794, C1795, R1797
-46-
AA1-A
Advertisement
Table of Contents
