3MH
1-4-6
1-4-2 Self-diagnosis
(1) Self-diagnostic function (operation panel is a 7-segment type)
When an unexpected error is detected for some reason, a system error (A call error) will be indicated. After a system error
(A call error) is indicated, the error can be cleared by turning the main power switch off and then on. If a system error (A
call error) occurs frequently, a fault may have occurred. Check the details of the C call to take proper measures.
(2) Self diagnostic codes (operation panel is a 7-segment type)
Code
Contents
Remarks
Causes
Check procedures/corrective measures
A0420
First paper feeder communication
problem
Communication fails five times succes-
sively.
First paper feeder
installed incor-
rectly.
Check the installation state of the first paper
feeder and adjust it if it is not properly
installed.
Defective PWB.
Replace the main/engine PWB or cassette
main PWB and check for correct operation.
A0500
Second paper feeder communication
problem
Communication fails five times succes-
sively.
Second paper
feeder installed
incorrectly.
Check the installation state of the second
paper feeder and adjust it if it is not properly
installed.
Defective PWB.
Replace the main/engine PWB or cassette
main PWB and check for correct operation.
A0510
Third paper feeder communication
problem
Communication fails five times succes-
sively.
Third paper feeder
installed incor-
rectly.
Check the installation state of the third paper
feeder and adjust it if it is not properly
installed.
Defective PWB.
Replace the main/engine PWB or cassette
main PWB and check for correct operation.
Содержание DF-420
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