Caple C813C User Manual download pdf (Page 30)

（1） Check if the connector of drawer fits the definition of SENOR standard drawer connector;

（2） Check if the 6pin crystal connector becomes oxidized or dirty

（3） Check if the 6pin socket becomes oxidized , dirty or out of shape;

（4） Check if the fourth drawer connector is under AC 20V;

（5） Check if the big cable between the communication board and the mainboard looses or drops;

（6） It may be the problem of communication board or circuit abnormalities of mainboard. Please

change a new communication board for testing, if it still doesn’t work, change a new mainboard

for testing again.

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Caple C813C User Manual Page 30