Read Sharp MX-1800N (serv.man16) Service Manual online
MX-1800N SELF DIAG AND TROUBLE CODE 8 – 12
E7-90
Communication trouble between the
controller and the engine
controller and the engine
EE-EC
Auto developer adjustment trouble
(The sample level for every rotation is
other than 128
(The sample level for every rotation is
other than 128
± 10).
EE-EL
Auto developer adjustment trouble
(overtoner error)
(overtoner error)
EE-EU
Auto development adjustment trouble
(Under-toner abnormality)
(Under-toner abnormality)
F1-00
Finisher communication trouble
(Machine side detection)
(Machine side detection)
F1-03
Finisher swing motor trouble
(MX-FNX1)
(MX-FNX1)
F1-08
Finisher stapler shift motor trouble
F1-10
Finisher staple motor abnormality
F1-15
Finisher tray lift motor abnormality
Trouble content
Communication trouble between the MFP and the
PCU (MFP detection)
Communication establishment error/Framing/
Parity/Protocol error
PCU (MFP detection)
Communication establishment error/Framing/
Parity/Protocol error
Section
MFP
Case 1
Cause
PCU PWB connector connection trouble
Check and
remedy
remedy
Check the connector connection between the PCU
PWB and the MFPcnt PWB.
PWB and the MFPcnt PWB.
Case 2
Cause
Harness trouble between the PCU PWB and the
MFPcnt PWB
MFPcnt PWB
Check and
remedy
remedy
Check the harness between the PCU PWB and
the MFPcnt PWB.
the MFPcnt PWB.
Case 3
Cause
Broken connector pin of the PCU PWB mother
board
board
Check and
remedy
remedy
Check grounding of the machine.
Trouble content
Auto developer adjustment trouble (The sample
level for every rotation is other than 128
level for every rotation is other than 128
± 10.)
<Detection only with SIM25-2, no trouble memory,
only display>
only display>
Section
PCU
Case 1
Cause
Toner density sensor trouble, charging voltage/
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
Check and
remedy
remedy
Use SIM25-2 to execute the auto development
adjustment.
adjustment.
Trouble content
The sample level is 76 or below, or the control
voltage is 208V or above. <Detection only with
SIM25-2, no trouble memory, only display>
voltage is 208V or above. <Detection only with
SIM25-2, no trouble memory, only display>
Section
PCU
Case 1
Cause
Toner density sensor trouble, charging voltage/
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
Check and
remedy
remedy
Use SIM25-2 to execute the auto development
adjustment.
adjustment.
Trouble content
The sample level is 178 or above, or the control
voltage is 51V or below. <Detection only with
SIM25-2, no trouble memory, only display>
voltage is 51V or below. <Detection only with
SIM25-2, no trouble memory, only display>
Section
PCU
Case 1
Cause
Toner density sensor trouble, charging voltage/
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
developing voltage trouble, toner density trouble,
developing unit trouble, PCU PWB trouble
Check and
remedy
remedy
Use SIM25-2 to execute the auto development
adjustment.
adjustment.
Trouble content
Communication line test error when turning on the
power or after canceling an exclusion simulation.
Communication error with the finisher
power or after canceling an exclusion simulation.
Communication error with the finisher
Section
PCU
Case 1
Cause
Malfunction due to noises
Check and
remedy
remedy
Turn OFF/ON the power to cancel.
Case 2
Cause
PCU finisher connector or harness connection
error or disconnection
error or disconnection
Check and
remedy
remedy
Check the connector and harness in the
communication line.
communication line.
Case 3
Cause
Finisher control PWB trouble
Check and
remedy
remedy
Replace the finisher control PWB.
Case 4
Cause
Control PWB (PCU) trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
Swing motor operation trouble (MX-FNX1)
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble
overvoltage, finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the motor
(FSWM).
Replace the finisher control PWB.
(FSWM).
Replace the finisher control PWB.
Trouble content
Stapler shift motor operation trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble
overvoltage, finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the staple
motor (FSM).
Replace the finisher control PWB.
motor (FSM).
Replace the finisher control PWB.
Trouble content
Staple operation trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, saddle finisher control PWB trouble
overvoltage, saddle finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the staple
motor (FFSM).
Replace the finisher control PWB.
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
overvoltage, finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the tray lift
motor (FTLM).
Replace the finisher control PWB.
motor (FTLM).
Replace the finisher control PWB.
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