Inspect main PCB connector (CN11)
▶
pin to pin short(Back)
7-1
F-CODE FLOW CHART
Key short error
F-1 error
Code Error mode Operation Times/sampling
F-1 Key shorted
If a key pad is continuously short for 60 seconds.
Key short error (F-1)
Plugged out the power, remove keypad-tail
and check F-1 error recur or not,
after plugging in the power
Remove the main PCB(002A) harness
and pull the PCB(002A) forward from the PCB case
Replace keypad or keypad assembly
Disconnect power
recur?
Yes
Front Back
Normal?
Repairable
by yourself?
END
Yes
Yes
No
No
No
END
Replace the main PCB(002A)
Repair and fix
END
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