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21HM-10F
CIRCUIT TO BE CHECKED:
Sync. Separator Circuit.
Normal
Check C502 and C514.
Check IC801,R801,R802,
R803,D804,D805,D806
The picture colour is cyan.
Check Q870,Q885 and
their adjacent circuits.
TROUBLESHOOTING TABLES.
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
DEFECTIVE VERTICEL AMP.
AND VERTICAL LINEARITY
Readjusted vertical size.
Vertical linearity and size
NO VERTICAL SCAN
NO SPECIFIC COLOUR
NO
Is some colour produced in
B/W broadcast reception?
and Q801.
The picture colour is magenta.
Check Q871,Q883 and
their adjacent circuits.
Check pin33 and 34
of IC801.
(Bass Data)
is abnormal.
Check R502,R505
Check IC501 bias.
YES
YES
36
Abnormal
Check IC501.
Is the white balance
properly adjusted?
NO
Readjusted the white
balance.
The picture colour is yellow.
Check Q872,Q887 and
their adjacent circuits.
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