Sharp MX-B381 / MX-B401 (serv.man7) Service Manual ▷ View online
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 10
11. Fans and filter
Signal name
Name
Function/Operation
FUFM
Fusing cooling fan motor
Cools the fusing unit.
HDDFM
HDD cooling fan motor
Cools the HDD.
LSUFM
LSU cooling fan motor
Cools the LSU.
POFM
Paper exit cooling fan motor
Cools the paper exit section.
PROFM1
Process fan motor 1
Cools the process section.
PROFM2
Process fan motor 2
Exhausts ozone.
PSFM
Power PWB cooling fan motor
Cools the power PWB.
No.
Name
Function/Operation
1
Ozone filter
Absorbs ozone generated in the image process section.
POFM
FUFM
PSFM
LSUFM
PROFM1
PROFM2
HDDFAN
1
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 11
12. PWB
No.
Name
Function/Operation
1
LVDS PWB
Converts the display signal and outputs to the LCD.
2
LCD INV PWB
Generates the high voltage for the LCD back-light.
3
MFP OPE-P PWB
Outputs the key operation signal.
4
CL inverter PWB
Drives the scanner lamp.
5
CCD PWB
Scans the document images.
6
RSPF driver PWB
Controls the RSPF.
7
Scanner control PWB
Controls the scanner section.
8
PCU PWB
Controls the engine section.
9
MFPC PWB
Controls images and the whole machine.
10
LD PWB
Controls laser lighting.
11
BD PWB
Detects laser and outputs the synchronous signal.
12
ACDC power PWB
Controls the primary side power source and outputs the secondary side voltage.
13
Paper size detection PWB
Detects the paper size in the tray 1.
14
MC PWB
Generates the high voltage for the main charger and the developing bias voltage.
15
DV initial PWB
Detects the DV model.
16
LSU MOTHER PWB
Controls the LSU. Interfaces the MFPC PWB and PCU PWB.
17
HL PWB
Controls the heater lamp.
18
TC PWB
Generates each transfer voltage and separation voltage.
4
13
9
10
10
12
7
11
6
5
8
17
18
16
14
15
3
1 2
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 12
13. Fuses and Thermostats
Signal name
Name
Specifications
Section
F001
Fuse
AC250V T10AH (200V series)
AC250V 20A (120V series)
AC250V 20A (120V series)
ACDC power PWB
F002
Fuse
AC250V T10AH (200V series) (Not provided in 120V series)
ACDC power PWB
F003
Fuse
AC250V T2AH (Common in 200V series and 120V series)
ACDC power PWB
F004
Fuse
AC250V T2AH (200V series) (Not provided in 120V series)
ACDC power PWB
F101
Fuse
AC250V T2AH (Common in 200V series and 120V series)
ACDC power PWB
F201
Fuse
AC250V T5AH (Common in 200V series and 120V series)
ACDC power PWB
F301
Fuse
AC250V T2AH (Common in 200V series and 120V series)
ACDC power PWB
F401
Fuse
AC250V T4AH (Common in 200V series and 120V series)
ACDC power PWB
F402
Fuse
AC250V T6.3AH (Common in 200V series and 120V series)
ACDC power PWB
F403
Fuse
AC250V T6.3AH (Common in 200V series and 120V series)
ACDC power PWB
F404
Fuse
AC250V T6.3AH (Common in 200V series and 120V series)
ACDC power PWB
F405
Fuse
AC250V T6.3AH (Common in 200V series and 120V series)
ACDC power PWB
RDTCT_EX1
External thermostat
Prevents against overheating of the fusing roller.
Fusing unit
RDTCT_EX2
External thermostat 2
Prevents against overheating of the fusing roller.
Fusing unit
RDTCT_Low
Lower thermostat
Prevents against overheating of the fusing roller.
Fusing unit
RDTCT_Main
Upper thermostat
Prevents against overheating of the fusing roller.
Fusing unit
RDTCT_Main
RDTCT_Low
RDTCT_EX1
F401
F402
F403
F405
F404
F301
F002
F001
F003
F004
F101
F201
RDTCT_EX2
MX-B381/B401 EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 13
14. Gates
No.
Name
Function/ Operation
1
Switchback gate
Guides paper which is switched back by the paper exit roller to the switchback section in the duplex copy mode.
2
RSPF reverse gate
Guides paper which is switched back by the paper exit roller to the transport roller 4 when duplex scanning of a
document is performed.
document is performed.
2
1
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