9 ] Troubleshooting - Sharp SF-A57 Service Manual

[9] TROUBLESHOOTING
A. ADF does not operate.
(Common to SF-A18/A57)
A
Is the interface
NO
harness connected
properly ?
YES
Is DC5V
NO
supplied between
CN6-3 and -4 ?
YES
Is DC24V
NO
supplied between
CN6-1 and -2 ?
YES
NO
Is the original set
display lighted ?
YES
Replace the control
PWB.
Check or replace the
harness.
Is the power
fuse blown off ?
YES
Replace the power fuse.
E
Replace the power
source.
B. Motor error (DFM)
(Common to SF-A18/A57)
B
Is the load
NO
at the motor shaft
normal ?
YES
Does the
NO
motor rotate even
slightly ?
YES
Replace the
motor.
Is the motor
NO
clock sensor output
normal ?
Replace the control
PWB.
– 23 –
Adjust the mechanism load
and the drive system, and
remove foreign materials.
Is a voltage
NO
supplied between
CN5-1 and -2 ?
YES
Does the
harness
conduct ?
YES
Replace the control
E
PWB.
Replace the harness.
NO