Sharp MX-M363N / MX-M363U / MX-M503N / MX-M503U (serv.man17) Service Manual ▷ View online
MX-M503N EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 13
J. Drive motor
Signal name
Name
Type
Function/Operation
ADUM_H
ADU motor upper
Stepping motor
Drives the transport roller 13.
ADUM_L
ADU motor lower
Stepping motor
Drives the paper transport roller in the right door section.
CLUM1
Paper tray lift-up motor
(Paper feed tray 1)
(Paper feed tray 1)
DC brush motor
Drives the lift plate of the paper feed tray.
CLUM2
Paper tray lift-up motor
(Paper feed tray 2)
(Paper feed tray 2)
DC brush motor
Drives the lift plate of the paper feed tray.
CPFM
Paper feed motor
Brush-less motor
Drives the paper feed section.
DM
Drum motor
Brush-less motor
Drives the OPC drum and the developing unit.
FUM
Fusing drive motor
Brush-less motor
Drives the fusing unit.
MIM
Scanner motor
Stepping motor
Drives the scanner (reading) unit.
OSM
Shifter motor
Stepping motor
Performs offset of paper.
PFM
Transport motor
Stepping motor
Drives the transport roller which is between the resist roller and the paper feed section.
Drives the transport roller which is between the resist roller and the right door section.
Drives the transport roller which is between the resist roller and the right door section.
PGM
Polygon motor
DC brush-less motor
Scans the laser beam.
POM
Paper exit drive motor
Stepping motor
Drives the paper exit roller.
RRM
Resist motor
Stepping motor
Drives the resist roller and controls ON/OFF.
WEBM
Fusing web cleaning motor
Synchronous motor
Drives the fusing web cleaning paper.
PFM
RRM
CPFM
CLUM1
CLUM2
ADUM_H
OSM
POM
FUM
WEBM
MIM
DM
PGM
ADUM_L
MX-M503N EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 14
K. Lamps and gates
Signal name
Name
Type
Function/Operation
CCFT
LCD back-light
Cold Cathode Fluorescent Tube
Back-light for LCD
CLI
Scanner lamp
N model: LED
U model: Xenon lamp
U model: Xenon lamp
Radiates lights onto a document for the CCD to scan the document image.
HL_UM
Heater lamp (main)
Heats the heat roller (main).
HL_US
Heater lamp (sub)
Heats the heat roller (sub).
HL_UW
Heater lamp (for warm-up)
Heats up supplementarily when warming-up.
No.
Name
Type
Function/Operation
1
Right paper exit gate
Selects the paper path to transport paper to the duplex (ADU) section or to
discharge paper to the right tray.
discharge paper to the right tray.
2
ADU reverse gate
Switches the transport route of paper to the duplex (ADU) section.
1
2
HL_UM/HL_US/HL_UW
CCFT
CLI
(N model)
(U model)
CLI
MX-M503N EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 15
L. Fans and filters
Signal name
Name
Function/Operation
CPUFAM
MFP PWB cooling fan
Cools the MFP PWB.
LSUFM
LSU cooling fan
Cools the LSU section.
OZFM
Ozone fan
Exhausts ozone.
PSFM1
Power cooling fan 1
Cools the power unit.
PSFM2
Power cooling fan 2
Cools the power unit.
POFM1
Paper exit cooling fan 1
Cools the fusing and the paper exit section.
POFM2
Paper exit cooling fan 2
Cools the fusing and the paper exit section.
POFM3
Paper exit cooling fan 3
Cools the fusing and the paper exit section.
RDCFM
Suction fan
Stabilizes paper transport.
No.
Name
Function/Operation
1
Ozone filter
Absorbs ozone generated in the image process section.
2
Toner filter
Prevents dispersing of toner.
POFM1
POFM3
POFM2
CPUFAM
2
2
PSFM1
PSFM2
OZFM
1
LSUFM
RDCFM
MX-M503N EXTERNAL VIEW AND INTERNAL STRUCTURE 3 – 16
M. PWB
8
11
1
29
3
16
4
10
6
19
5
2
23
22
17
18
28
26
7
24
25
20
12
13
MX-M283N, MX-M363/M453/M503 N
MX-M283N, MX-M363/M453/M503 U
14
15
27
12
13
MX-M282/M362/M452/M502 N
14
15
27
N model
U model
12
13
14
15
27
9
9
1
1
: '10/Jun/01
1
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