Sharp 21F-PA18

21F-PD250 / 21F-PT220 / 21F-PA18 / 21F-PA18(B)
5 – 3
TROUBLE SHOOTING FLOWCHART (Continued)
NO SPECIFIC COLOUR
Is some colour produced in
B/W broadcast reception ?
Is the white balance properly
adjusted ?
Re-adjust the white balance.
The picture colour is yellow.The picture colour is magenta.The picture colour is cyan.
Check Q855 and its adjacent
circuits.
Check Q854 and its adjacent
circuits.
Check Q853 and its adjacent
circuits.
Check IC801.
Check IC801 and bias
control circuit.
NO COLOUR
“PAL”
(NO COLOUR SYNCHRONIZATION)
Check X801 (4.43MHz)
Vertical linearity and size are
abnormal.
DEFECTIVE VERTICAL AMP.
AND VERTICAL LINEARITY
Re-adjust vertical size.
(Bus Data)
Check R503, R506, R513,
R520 and C515.