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21HS-50S
TROUBLESHOOTING TABLES.
NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION
CIRCUIT TO BE CHECKED: Sync. Separator Circuit.
Check pin33 and 34 of IC801.
DEFECTIVE VERTICEL AMP. AND VERTICAL LINEARITY
Readjusted vertical size. (Bass Data)
Vertical linearity and size is abnormal.
Check R502,R505
NO VERTICAL SCAN
Check IC501 bias. Normal Abnormal
Check C502 and C514.
Check IC501.
NO SPECIFIC COLOUR
NO YES
Is some colour produced in B/W broadcast reception? Check IC801,R801,R802, R803,D804,D805,D806 and Q801.
YES
Is the white balance properly adjusted?
NO
Readjusted the white balance.
The picture colour is cyan.
The picture colour is magenta.
The picture colour is yellow.
Check Q870,Q885 and their adjacent circuits.
Check Q871,Q883 and their adjacent circuits.
Check Q872,Q887 and their adjacent circuits.
www.rtv-horvat-dj.hr 35
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