Sharp 21C-FX1G Manual de servicio - Página 27
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TROUBLE SHOOTING TABLE
NEITHER VERTICAL NOR
HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED:
» Sync. Separator Circuit.
Check pins(33) and (34) of
IC801.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Readjust vertical size.
(Bas Data)
Vertical linearity and size is
abnormal.
Check R504, R503, R506,
R513 and C517.
NO VERTICAL SCAN
Check IC501 bias.
Check C506 and C507.
(Continued)
Check IC501.
27-1
TROUBLE SHOOTING TABLE
NO SPECIFIC COLOUR
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 Q870, Q885 and their
Check Q871, Q883 and their
adjacent circuits.
adjacent circuits.
NO SPECIFIC COLOUR
"PAL / SECAM / NTSC"
(NO COLOUR SYNCHRONIZATION)
(PAL / SECAM)
Check IC801 and bias
control circuit.
Check X1001.(12MHz)
(Continued)
Is the white balance properly
adjusted ?
Readjust the white balance.
The picture colour is yellow.
Check Q872, Q887 and their
adjacent circuits.
(NTSC)
Check Q251 and peripheral
circuit.
27-2