MX-FNX3, MX-FNX4. MXFNX3 and MXFNX4 Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 122

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MX-FNX4  SELF DIAG MESSAGE AND TROUBLE CODE  10 – 2
2. Trouble code
A. Outline
The CPU on the machine’s finisher control PCB is equipped with a
mechanism to check the machine condition as needed; when it
detects a fault, the machine sends the trouble contents to the host
machine in the form of a code and a detail code.
B. Trouble code
(1) Finisher unit
 
F1-00
Finisher communication trouble
               (Machine side detection)
 
F1-03
Finisher oscillation motor trouble
 
F1-08
Finisher stapler shift motor trouble
 
F1-10
Finisher staple motor abnormality
 
F1-15
Finisher tray lift motor abnormality
 
F1-19
Finisher pre-alignment motor abnor-
mality
 
F1-20
Finisher after-alignment motor abnor-
mality
 
F1-21
Finisher interface fan motor abnormal-
ity
 
F1-22
Finisher rear edge assist motor trou-
ble
 
F1-23
Shutter trouble
Trouble content
Communication line test error when turning on the 
power or after canceling an exclusion simulation. 
Communication error with the finisher
Section
PCU
Case 1
Cause
Malfunction due to electrical noises
Check 
and 
Remedy
Turn OFF/ON the power to cancel.
Case 2
Cause
PCU finisher connector or harness connection error 
or disconnection
Check 
and 
Remedy
Check the connector and harness in the 
communication line.
Case 3
Cause
Finisher control PWB trouble
Check 
and 
Remedy
Replace the finisher control PWB.
Case 4
Cause
Control (PCU) PWB trouble
Check 
and 
Remedy
Replace the PCU PWB.
Trouble content
Oscillation motor operation abnormality
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the motor 
(FSWM).
Replace the finisher control PWB.
Trouble content
Stapler shift motor operation abnormality
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the staple 
motor (FSM).
Replace the finisher control PWB.
Trouble content
Staple operation trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the staple 
motor (FFSM).
Replace the finisher control PWB.
Trouble content
Lift motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the tray lift 
motor (FTLM).
Replace the finisher control PWB.
Case 2
Cause
Interlock switch (black bar-shape switch under the 
upper tray) operation
Check 
and 
Remedy
Check that there is nothing on the interlock switch.
If there is, remove it.
Trouble content
Pre-alignment motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the 
prealignment motor (FFJM).
Replace the finisher control PWB.
Trouble content
After-alignment motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the 
afteralignment motor (FRJM).
Replace the finisher control PWB.
Trouble content
Interface transport fan motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor 
overvoltage, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the fan motor 
(FJFM).
Replace the finisher control PWB.
Trouble content
Rear edge assist motor operation trouble
Section
PCU
Case 1
Cause
Motor trouble, HP sensor trouble, harness 
disconnection, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the rear edge 
assist motor.
Replace the finisher control PWB.
Trouble content
Shutter operation trouble
Section
PCU
Case 1
Cause
Motor trouble, HP sensor trouble, harness 
disconnection, finisher control PWB trouble
Check 
and 
Remedy
Use SIM3-3 to check the operation of the bundle 
paper exit motor.
Replace the finisher control PWB.
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