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A
Power Circuit abnormal
Is C333 AC 220V?
Yes
Is C305 DC 310V?
Yes
Is the voltage between 4,6 pin of N301 13V?
Yes
Are transfoemer secondary +13V,+18V,+25V,-24V output?
Yes
Is XP302,XP303,XP304 normal?
Yes
Scart
Normal
No
Power cord isn't inserted firmly
No
No
Check if transformer is damaged.
Check secondary commute circuit.
No
Check secondary feedback circuit.
Check if secondary short.
No
Check N302,N303,N307 and perpheral components.
30
F301 is open.
XP301 is open.
or power cord is open.
Check commute circuit.
Check L301.
Replace N301.
Check V304.
Check regulated circuit.
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