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TROUBLE SHOOTING TABLE
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
» Sync. Separator Circuit.
Check pins (16), (17) and
(34) of IC801.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust vertical size.
(Bus Data)
Vertical linearity and size
abnormal.
Check R504, R503, R506,
R513, C517 and D501.
NO VERTICAL SCAN
Check IC501 bias.
Normal
Check C503 and C507.
(Continued)
Abnormal
Check IC501.
17-1
TROUBLE SHOOTING TABLE
NO SPECIFIC COLOUR
NO
Is some colour produced in
B/W broadcast reception ?
Check IC801, R801, R802,
R803, D804, D805, D806
and Q801.
The picture colour is cyan.
The picture colour is magenta.
Check Q871, Q883 and its
Check Q870, Q885 and its
adjacent circuits.
adjacent circuits.
NO SPECIFIC COLOUR
"PAL"
(NO COLOUR SYNCHRONIZATION)
Check IC801 and bias
control circuit.
Normal
Check X1001(12 MHz).
(Continued)
YES
YES
Is the white balance properly
adjusted ?
NO
Readjust the white balance.
The picture colour is yellow.
Check Q872, Q887 and its
adjacent circuits.
17-2
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