Sharp MX-M905 (serv.man2) Service Manual ▷ View online
MX-M905 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 13
J. Fans and Filters
Signal name
Name
Type
Function / Operation
Trouble code
CCDFM
CCD cooling fan
Fan motor
Cools the CCD and the CL inverter.
L2-10
CFM-ADU1a
Reverse transport cooling fan
Sirocco fan
Cools paper in the reverse section.
L4-38
CFM-ADU1b
Reverse cooling fan
Sirocco fan
Cools the reverse section.
L4-39
CFM-ADU2a
ADU section paper cooling fan 1
Axial-flow fan (
60)
Cools paper in the ADU section.
L4-48
CFM-ADU2b
ADU section paper cooling fan 2
Axial-flow fan (
60)
Cools paper in the ADU section.
L4-49
CFM-CL1
Process cooling fan 1
Axial-flow fan (
60)
Cools the process section.
L4-50
CFM-DC1
Power cooling fan 1
Axial-flow fan (
60)
Cools the power section.
L4-32
CFM-CL2
Process cooling fan 2
Axial-flow fan (
60)
Cools the process section.
L4-51
CFM-CL3
Process cooling fan 3
Axial-flow fan (
60)
Cools the process section.
L4-52
CFM-CL4
Process cooling fan 4
Axial-flow fan (
60)
Cools the process section.
L4-53
CFM-DC2
Power cooling fan 2
Axial-flow fan (
60)
Cools the power section.
L4-32
CFM-DC3
Power cooling fan 3
Axial-flow fan (
60)
Cools the power section.
L4-47
CFM-DV1
Developing cooling fan 1
Axial-flow fan (
60)
Cools the developing section.
L4-46
CFM-PA1
Paper cooling fan
Axial-flow fan (
60)
Cools paper in the paper exit section.
L4-43
CFM-PC
Process section cooling fan
Sirocco fan
Cools the process section.
L4-58
CFM-PO1
Polygon cooling fan
Axial-flow fan (
60)
Cools the polygon section.
L4-34
CFM-Tr
Process cooling fan
Axial-flow fan (
40)
Cools the process section.
L4-55
FM-CTL1
CTL cooling fan
Axial-flow fan (
60)
Cools the controller section.
L4-30
FM-DV1
Toner suction fan
Sirocco fan
Sucks toner.
L4-36
FM-HDD
HDD cooling fan
Axial-flow fan (
60)
Cools the HDD.
L4-30
SPFFAN1
DSPF motor cooling fan 1
Fan motor
Cools the DSPF motor.
U5-16
VFM-EX
Machine exhaust fan 1
Axial-flow fan (
120)
Discharges heat from the fusing section.
L4-31
VFM-EX1
Ozone exhaust fan 1
Sirocco fan
Discharges ozone.
L4-40
VFM-EX2
Ozone exhaust fan 2
Sirocco fan
Discharges ozone.
L4-41
No.
Name
Function / Operation
1
Dust cover
Collects dust in sucked air.
2
Exhaust filter
Sucks dust in exhaust air.
3
Ozone filter
Decomposes ozone generated in the process section.
4
Toner filter
Prevents toner dispersion.
5
DVBOX filter
Prevents toner dispersion.
CFM-DV1
4
FM-DV1
CFM-ADU2a
CFM-CL1
CCDFM
5
CFM-ADU2b
SPFFAN1
2
1
FM-CTL1
FM-HDD
CFM-DC3
CFM-DC2
CFM-DC1
CFM-DC1
VFM-EX
CFM-PO1
VFM-EX2
CFM-ADU1a
CFM-ADU1b
CFM-ADU1b
VFM-EX1
CFM-PA1
3
CFM-PC
CFM-CL2
CFM-CL3
CFM-Tr
CFM-CL4
MX-M905 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 14
K. PWB
No.
Name
Function / Operation
1
DSPF cnt PWB
Controls the DSPF.
2
DSPF driver PWB
Drives the DSPF motor.
3
DSPF Flash PWB
Stores the DSPF program data.
4
DSPF CCD PWB
DSPF (back) scanning CCD.
5
SCNCNT PWB
Controls the scanner.
6
CCD PWB
Scanner (front) read CCD.
7
HOME KEY PWB
Outputs the return-home/power-saving key signals.
8
POWER SW PWB
Indicates power-on/off and outputs the power on/off key signal.
9
Wifi PWB
Wifi interface
10
Size detection PWB
Detects the paper size in the tray 3.
11
Side detection PWB
Detects the paper size in the tray 4.
12
PCU PWB
Controls the engine section.
13
HL PWB
Controls the heater lamp.
14
USB PWB
USB interface
15
Driver PWB (paper exit)
Drives the paper exit system transport motor.
16
WH PWB (option)
Controls on/off of the dehumidifying heater.
25
LSU
26
24
33
34
32
28
22
31
20
27
30
9
2
12
15
1
3
21
5
16
10
13
11
18
19
17
4
29
23
7
8
14
6
MX-M905 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 15
L. Heater
17
AC PWB
Controls the power on the primary side.
18
SUB POWER
Supplies power for the option and brushless motors of the machine.
19
Main power
Supplies the power for the machine.
20
Driver PWB (Paper feed)
Drives the paper feed system transport motor.
21
High voltage PWB
Outputs the main charger voltage, the developing bias voltage, the transfer voltage, and the
transfer belt cleaning voltage. / Outputs the bias voltage for transfer cleaning brush.
transfer belt cleaning voltage. / Outputs the bias voltage for transfer cleaning brush.
22
SCN Flash PWB
Store the SCN program data.
23
PCU-Flash PWB
PCU program ROM PWB.
24
LSU PWB
Controls the LSU.
25
BD PWB
Detects the laser synchronous signal.
26
LD PWB
Controls lighting the laser. (4 beams)
27
High voltage PS PWB
Prevents against leakage of the transfer current.
28
PTDL PWB
Discharge the OPC drum surface before transfer.
29
Process control sensor PWB
Detects the toner density on the drum.
30
Mother PWB
Controls power energy saving and relays the MFPc connect signal.
31
MFPC PWB
Controls the image-related items and controls all over the machine.
32
Main Reus Flash memory
Stores the ASIC1 program data.
33
Sub Reus Flash memory
Stores the ASIC2 program data.
34
mSATA SSD card memory
Stores the SOC program data, snapshot, the e-manual data, the log data
Signal name
Name
Function / Operation
Note
WH1 DESK
Dehumidifying heater (Paper feed tray 1, 2)
Dehumidifies paper. (Paper feed tray 1, 2)
Option.
WH1 SCN
Scanner dehumidifying heater
Dehumidifies the scanner unit.
Option.
WH2 DESK
Dehumidifying heater (Paper feed tray 3, 4)
Dehumidifies paper. (Paper feed tray 3, 4)
Option.
No.
Name
Function / Operation
WH1 SCN
WH1 DESK
WH2 DESK
MX-M905 EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 16
M. Gates
No.
Name
Function / Operation
1
Face-up/face-down select gate
Selects face-up or face-down.
2
Paper exit/reverse select gate
Select gate when paper exit in face-down.
3
Reverse ADU select gate
Select gate of transport to the ADU section and paper exit in face-down.
4
ADU reverse select gate
Transport gate to the ADU section when duplex printing.
3
4
1
2
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