E7 (Indoor Pcb /Display Board Communica�On Error) - Roland FAVORITE ON-OFF Series Service Manual

5.7 E7 (Indoor PCB /Display board communica�on error)
Descrip�on: Indoor PCB does not receive feedback from Display board.
Recommended parts to prepare:
• Wiring mistake
• Faulty PCB
• Display board malfunc�on
Troubleshoo�ng and repair:
Power off, then restart the unit
Is it s�ll displaying
Check the wirings and
Replace the indoor main
Replace the Display board.
Page 74
2 minutes later.
the error code?
YES
connec�on.
Are all the
connec�ons
good?
YES
PCB.
Is the error
ex�nguished?
NO
NO
The unit is opera�ng normally.
Correct the connec�on
NO
or replace the Wirings.