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● Nothing is displayed on the LCD but the switch panel works.
Possible Cause 1 : The connector may be disconnected.
Solution 1 :
Possible Cause 2 : The LCD unit may be out of order.
Solution 1 : Replace the LCD unit.
Possible Cause 3 : The switch board may be faulty.
Solution 1 : Check the soldering surface on the switch panel board.
Solution 2 : Replace the switch panel board.
● The panel switch get stuck and does not spring back.
Possible Cause 1 : A burr on the key top prevents it from springing back.
Solution 1 :
● No sound comes from LINE OUT.
Possible Cause 1 : Are the IN and OUT terminals correctly connected?
Solution 1 : Check the connection.
Possible Cause 2 : The connector may be disconnected.
Solution 1 :
Solution 2 :
Solution 3 :
Solution 4 : Check if the cable is snapped or not.
Possible Cause 3 : The switch board may be faulty.
Solution 1 : Check the analog board inside the sound source unit and the soldering surface
Solution 2 : Replace the analog board inside the sound source unit.
Solution 3 : Replace the LINE board inside the controller.
All manuals and user guides at all-guides.com
and check if the connector between the panel board and LCD unit is
disconnected.
and remove the burr on the key top.
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check if all connectors are firmly inserted.
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LINE board is displaced.
on the LINE board of the controller.
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