Developing Section] - Sharp AR-M355U Service Manual

[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
TM1
DM
1
3
1 2 3 3
HUS-DV
TCS
TH-DV
Signal
Code
name
HUS-DV HUS-DV Developing humidity sensor
TH-DV TH-DV Developing temperature
thermistor
TCS TCS Toner density sensor
DM DM Drum motor
TM1 TM Toner motor
Bias Bias Developing bias
No. Name
1 Developing roller
2 DV doctor
3 Mixing roller (MX roller)
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 16
HUS-DV
TH-DV
TCS
51021-0400
(NC)
+24V1
TCS
GND2
ZHR-4
+5V2
HUS-DV
GND2
TH-DV
SRA-21T-3
Name
Developing section peripheral humidity
detection
Temperature detection around the
developing unit
Toner density detection
Drives the drum/developing section.
Drives the toner hopper.
High voltage for developing bias
Forms magnetic brush with developer and put toner on the OPC drum.
Keeps the height of the magnetic brush on the developing roller at a fixed level.
Mixes developer (carrier and toner) and charges toner negatively.
QR/P8-12S-C(01)
1
2
BR
3
BR
4
GY
1 5
2 6
BR
3 7
GY
4 8
RD
9
BL
10
BR
1 11
WH
2
12
3
4
Bias
Function/Operation
Operation
CN6
9604S-08C
DSW-F
1
DSW-F
2
GND2
3
GND2
4
5 DM\
6 DM-T
7 DMCLK\
8 (NC)
CN7
173981-2
BK
TMA
1
BK
2 TMB
CN5
B8B-PH-K-S
BR
GND2
1
GY
+5VCRU
2
BL
CRUCLK
3
BR
CRUSDA
4
PSPS\
5
6 +24V1
(NC)
7
8 +24V1
CN8
B11B-PH-K-S
BR
DVCH1 DVCH1
1 1
BR
DVCH2 2 2 DVCH2
BR
DVCH3 3 3 DVCH3
BR
TH-DV 4 4 TH-DV
GY
GND2 5 5 GND2
GY
GND2 6 6 GND2
BR
TCS TCS
7 7
GY
GND2 GND2
8 8
RD
+24V1 +24V1
9 9
BL
+5V2 10 10 +5V2
BR
HUS-DV
11 11 HUS-DV
WH
DVBias 12
#187
Bias
PCU PWB
Type Note
Humidity sensor Analog detector
Thermistor Analog
Magnetic sensor Analog detector
DC brushless motor
Synchronous motor