Sharp MX-M350 - Developing Section]

MX-M350/M450 N/U 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 31
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
99
HUS-DV
3
ZHR-4
GND2
Bias
4
(NC)
51021-0400
3
4
1
22
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
+5V2
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.