DOWNLOAD Sharp AR-M351U / AR-M451U (serv.man11) Service Manual ↓ Size: 1.78 MB | Pages: 17 in PDF or view online for FREE

Model
AR-M351U AR-M451U (serv.man11)
Pages
17
Size
1.78 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Maintenance details of following sections, 1-Process
File
ar-m351u-ar-m451u-sm11.pdf
Date

Sharp AR-M351U / AR-M451U (serv.man11) Service Manual ▷ View online

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 13
C. Operational descriptions
1) Toner image transfer
Toner images formed on the drum by the developing roller are
transferred to paper by the transfer roller.
Toner on the drum is negatively charged by stirring in the
developing unit. By applying a positive voltage to the transfer
roller, the transfer roller and paper on the transfer roller are
positively charged to transfer negatively charged toner images
to paper.
Separation operation
Since paper with toner images transferred on it is positively
charged, a high negative voltage is applied to the separation elec-
trode to separate the paper from the drum.
2) Transfer roller cleaning
After completion of the job, the applied voltage to the transfer
roller is switched to negative in order to attract toner from the
transfer roller to the OPC drum, cleaning the drum with the
cleaning blade.
The transfer cleaning voltage and the developing positive bias are
applied to the OPC drum at the timing shown below so that
remaining toner on the transfer roller is attracted again to the OPC
drum, performing cleaning.
1) When the power is turned on:
However, the cleaning voltage is not applied during warm up
after completion of SIM.
2) After completion of a print job
3) After printing 100 sheets (during 1 job)
200M
-1.8KV
Separation electrode
25   A  45ppm
19   A  31/35ppm
MAX 5KV
-800V
200M
-1.8KV
Separation electrode
25   A  45ppm
19   A  31/35ppm
MAX 5KV
-800V
200M
-1.8KV
Separation electrode
25   A  45ppm
19   A  31/35ppm
MAX 5KV
-800V
CLEANING
READY CONDITION
WARMING UP
PRINTING Job
CLEANING
1sec
PRINTING (100 Sheets)
PRINTING (100 Sheets)
CLEANING
1sec
CLEANING
1sec
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 14
D. Maintenance and parts replacement
(1) Maintenance list
(2) Maintenance and parts replacement
a. Transfer roller unit
1) Pull out the left door.
2) Remove the transfer lock pawl, and pull out the transfer roller
unit.
a-1. After-transfer star ring
1) Remove the transfer roller unit.
2) Remove the transfer rear star ring.
Unit name
No.
Part name
When 
calling
100K
200K
300K
400K
500K
600K
700K
800K
Remark
Transfer
1
Transfer roller
2
Discharge plate
3
TR bearing (F/R)
4
Transfer roller collar
5
After-transfer star ring
6
TR gear
1
3
6
4
2
3
4
5
No.
Unit
Parts
a
Transfer roller unit
1
After-transfer star ring
2
Discharge plate
3
Transfer roller
4
Transfer roller collar
5
TR bearing (F/R)
6
TR gear
a-5
a-2
a-1
a-4
a-5
a-3
a
a-4
a-6
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 15
a-2. Discharge plate
1) Remove the transfer roller unit.
2) Remove the screw, and remove the discharge plate holder
and the discharge plate.
a-3. Transfer roller
a-4. Transfer roller collar
a-5. TR bearing (F/R)
a-6. TR gear
1) Remove the transfer roller unit.
2) Remove the screw, and remove the discharge plate holder
and the discharge plate.
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 16
[Developing section]
A. General
In this section, toner is attached to electrostatic latent images
formed by laser beams on the OPC drum, making visible images.
B. Major parts and signal functions
TCS
HUS-DV
TH-DV
2
3
3
1
TCS
HUS-DV
TH-DV
TM1
DM
HUS-DV
TCS
+24V1
GND2
+5V2
DVBias
QR/P8-12S-C(01)
5
6
7
8
1
6
7
8
GND2
TCS
+24V1
1
2
3
2
+5V2
1
Bias
10
11
12
10
11
12
9
9
HUS-DV
3
ZHR-4
GND2
Bias
4
(NC)
51021-0400
3
4
1
2
2
3
4
5
DVCH1
DVCH2
DVCH3
GY
GY
RD
BL
BR
BR
GY
RD
BL
BR
WH
GY
TH-DV
GND2
BR
BR
BR
BR
BR
BR
4
TH-DV
GND2
GY
BR
WH
#187
CN8
7
1
2
3
4
5
6
8
9
10
11
+5V2
TCS
GND2
DVCH3
GND2
+24V1
DVCH1
GND2
DVCH2
HUS-DV
B11B-PH-K-S
TH-DV
SRA-21T-3
2
CN7
TMB
TMA
1
173981-2
BK
BK
1
2
3
4
5
6
7
8
CN5
+24V1
CRUCLK
+5VCRU
GND2
CRUSDA
PSPS\
(NC)
B8B-PH-K-S
BR
GY
BL
BR
+24V1
PCU  PWB
DM-T
GND2
DM\
1
2
3
4
5
6
7
8
CN6
GND2
DSW-F
DSW-F
DMCLK\
9604S-08C
(NC)
1
3
Code
Signal 
name
Name
Function/Operation
Type
Note
HUS-DV
HUS-DV
Developing humidity sensor
Developing section peripheral humidity 
detection
Humidity sensor
Analog detector
TH-DV
TH-DV
Developing temperature 
thermistor
Temperature detection around the 
developing unit
Thermistor
Analog
TCS
TCS
Toner density sensor
Toner density detection
Magnetic sensor
Analog detector
DM
DM
Drum motor
Drives the drum/developing section.
DC brushless motor
TM1
TM
Toner  motor
Drives the toner hopper.
Synchronous motor
Bias
Bias
Developing bias
High voltage for developing bias
No.
Name
Operation
1
Developing roller
Forms magnetic brush with developer and put toner on the OPC drum.
2
DV doctor
Keeps the height of the magnetic brush on the developing roller at a fixed level.
3
Mixing roller (MX roller)
Mixes developer (carrier and toner) and charges toner negatively.
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