27
21C-FX1(C)/(G)
21C-FX5/FX8
27-1
27-2
TROUBLE SHOOTING TABLE
(Continued)
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
»
Sync. Separator Circuit.
NO VERTICAL SCAN
Vertical linearity and size is
abnormal.
Check pins(33) and (34) of
IC801.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust vertical size.
(Bas Data)
Check IC501.
Check C506 and C507.
Check IC501 bias.
Check R504, R503, R506,
R513 and C517.
TROUBLE SHOOTING TABLE
(Continued)
NO SPECIFIC COLOUR
Is some colour produced in
B/W broadcast reception ?
Is the white balance properly
adjusted ?
Readjust the white balance.
The picture colour is yellow.
The picture colour is magenta.
The picture colour is cyan.
Check Q870, Q885 and their
adjacent circuits.
Check Q871, Q883 and their
adjacent circuits.
Check Q872, Q887 and their
adjacent circuits.
Check IC801 and bias
control circuit.
NO SPECIFIC COLOUR
“PAL / SECAM / NTSC”
(NO COLOUR SYNCHRONIZATION)
Check IC801, R801, R802,
R803, D804, D805, D806
and Q801.
Check X1001.(12MHz)
Check Q251 and peripheral
circuit.
(PAL / SECAM)
(NTSC)
