DOWNLOAD Sharp MX-1800N (serv.man31) Service Manual ↓ Size: 1.61 MB | Pages: 5 in PDF or view online for FREE

Model
MX-1800N (serv.man31)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
1.61 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Details of each Section - K Developing Section
File
mx-1800n-sm31.pdf
Date

Sharp MX-1800N (serv.man31) Service Manual ▷ View online

MX-1800N  DEVELOPING SECTION  K – 1
MX-1800N
Service Manual
 
[K] DEVELOPING SECTION
1. Electrical and mechanism relation diagram
CN12
B7P-PH-K-S
B7P-PH-K-S
/DVM_K_D
INT24V2
P-GND
/DVM_CL_CK
INT24V2
P-GND
4
1
2
5
6
7
/DVM_CL_D
DVM_CL_LD
5V
/DVM_K_CK
/DVM_K_D
1
2
4
INT24V2
P-GND
DVM_K_LD
5V
5
6
7
INT24V2
6
/DVM_K_CK
10
12
DVM_K_LD
4
1
5
3
9
11
2
P-GND
/DVM_CL_CK
DVM_CL_LD
/DVM_CL_D
PHNR-10-H,BU10P-TR-P-H
CN15
C
Q
R/P8-8P
P
S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C
Q
R/P8-8P
P
S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C
Q
R/P8-8P
P
S4P-PH-K-S
PHNR-10-H,BU10P-TR-P-H
C
Q
R/P8-8P
P
B40B-PADSS-B
S4P-PH-K-S
4
TSG_BK
7
T
CS_K
5
45
5
6
7
24V3
TCS_C
D-GND
7
8
D-GND
24V3
2
5
24V3
D-GND
4
2
3
TCS_C
5
6
7
DVSET_K
24V3
TCS_K
3
6
TCS_K
D-GND
TSG_BK
1
5
1
7
TCS_C
3
7
5VN
2
32
6
3
DVSET_K
2
8
24V3
D-GND
1
66
58
7
24V3
5
24V3
2
D-GND
4
7
D
-GND
7
1
TCS_Y
3
6
TCS_Y
D-GND
4
7
D
-GND
24V3
2
5
24V3
35
37
DVSET_C
39
33
24V3
TCS_C
D-GND
TSG_C
7
6
5
8
24V3
4
D
-GND
7
3
DVTYP_Y
8
24V3
6
TSG_BK
5VN
D-GND
DVTYP_K
9
8
10
5
24V3
TCS_M
TSG_M
D-GND
DVTYP_M
4
6
D-GND
40
5VN
7
T
CS_Y
4
5
D
-GND
6
6
T
SG_Y
TCS_Y
4
24V3
TCS_K
5
3
D-GND
7
11
3
4
6
25
27
31
29
D-GND
DVTYP_C
5VN
24V3
36
8
T
CS_M
D-GND
1
8
DVSET_M
24V2
32
6
D-GND
38
DVSET_Y
32
36
DVTYP_Y
30
TSG_Y
34
D-GND
28
TCS_M
3
T
CS_M
19
5
V
N
9
D-GND
17
TSG_BK
13
DVTYP_K
15
DVSET_K
5
7
8
1
8
1
D-GND
4
2
3
4
5VN
2
3
DVTYP_K
D-GND
4
DVTYP_K
3
DVSET_K
2
5VN
1
10
TSG_C
D-GND
DVTYP_C
DVSET_C
5
7
8
9
D-GND
8
1
6
4
TSG_C
D-GND
DVTYP_C
DVSET_C
3
5VN
44
4
1
D-GND
4
1
2
8
TSG_C
5VN
1
DVTYP_C
3
DVSET_C
2
1
6
DVTYP_M
12
10
T
S
G
_
M
1
4
D-GND
5VN
1
DVSET_M
2
20
5VN
5VN
5VN
1
0
1
DVSET_M
D-GND
4
DVTYP_M
3
8
9
TSG_M
1
DVSET_M
2
5
7
2
TSG_M
5
6
4
3
3
4
8
1
2
3
4
8
D-GND
DVTYP_M
2
DVSET_Y
9
1
5VN
1
0
TSG_Y
1
8
T
SG_Y
8
1
D
-GND
1
D-GND
4
2
DVTYP_Y
3
3
DVSET_Y
3
4
5VN
1
DVSET_Y
2
4
5VN
2
DVTYP_Y
6
PCU PWB
CN9
B3P-PH-K-S
AC
PWB
CN1
BS-K
(SPRING)
BS-K
B6P-PH-K-S
CN26
BS-C
(SPRING)
BS-C
BS-M
(SPRING)
BS-M
B32B-PHDSS-B
BS-Y
(SPRING)
BS-Y
1
INT24V2
HV_REM#
6
5
4
3
2
1
/HV_DATA#
/HV_CLK#
/HV_LD1#
INT24V2
P-GND
/HV_CLK#
/HV_LD1#
HV_REM#
20
21
22
23
24
MC
PWB
P-GND
/HV_DATA#
DVM_CL
DVM_K
BS_K
BS_M
BS_C
BS_Y
DVTYP_K
DVTYP_M
DVTYP_Y
DVTYP_C
TCS_K
TCS_M
TCS_C
BLACK
CYAN
MAGENTA
YELLOW
TCS_Y
1
1
1
2
2
2
2
1
3
MX-1800N  DEVELOPING SECTION  K – 2
2. Operational descriptions
Electrostatic latent images generated on the OPC drum by the
laser (writing) units (laser image ray) are converted into visible
images by toner.
Toner and carrier in the developing unit are agitated and trans-
ported by the mixing roller.
By mixing and transporting, toner and carrier are negatively
charged due to mechanical friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
3. Disassembly and assembly
A. Developing section
(1) Developing unit
1)
Open the front cabinet.
2)
Remove the waste toner bottle unit. 
Signal name
Name
Function/Operation
DVM_CL
Developer motor (color)
Color developing unit drive
DVM_K
Developer motor (black)
Black developing unit drive
BS
Developer bias (Y, M, C, K)
Developer bias
TCS
Toner density sensor (Y, M, C, K)
Controls the toner density in the developing unit. 
DVTYP
DV initial detection PWB (Y, M, C, K)
Detection of a new developing unit (machine exclusive for CRU)
No.
Name
Function/Operation
1
Developer roller
Latent electrostatic images on the OPC drum are changed to visible images.
2
Stirring roller
Stirring developer
3
Toner filter
Prevents dispersing of toner.
Unit
Parts
Maintenance
(1)
Developing 
unit
a
Developer
b
DV seal
c
DV side seal F
d
DV side seal R
e
DV initial PWB
f
Density sensor
g
Toner filter
(1)-a
(1)-c
(1)-g
(1)
(1)-b
(1)-e
(1)-f
(1)-d
1
2
MX-1800N  DEVELOPING SECTION  K – 3
3) Check that the lock is released as shown in (A). 
Loosen the blue screw, and open the drum positioning unit. 
* When the lock is not released, use a screwdriver to turn the
screw (B) counterclockwise so that it is fit as (A). 
4) Open the DV lock lever, and release the fixing screw. (1 posi-
tion for each color)
5) Pinch the knob and remove the development unit.
a. Developer
1)
Remove the developing unit.
2)
Remove two fixing screws of the DV cover.
3)
Hold the sections A, and remove the DV cover in the arrow
direction (B).
A
B
1
2
B
A
B
A
A
MX-1800N  DEVELOPING SECTION  K – 4
4) Take out the old developer, and insert the new developer.
* When replacing developer, use an extreme care not to drop
developer on the drive section (marked with {).
(Note for cleaning the developing unit)
If the developing unit is cleaned with a cleaner or an air blower
with much developer in the developing unit, static electricity
may be accumulated in the unit. In order to prevent against
this, note the following items.
* If metal part is brought into contact with the magnet roller surface
when transporting developer or removing foreign material from
the magnet roller, developer may adhere to the magnet roller sur-
face. Be careful to avoid this when handling the magnet roller.
* Remove developer in the developer unit as well as developer
attached to the magnet roller as far as possible.
(When cleaning the developing unit with an air blower [duct])
* Before cleaning with an air duct, remove developer from the unit
as far as possible, and ground the magnet roller rear side cored
bar as shown in the figure below and clean the unit with an air
blower. (Do not pinch the grounding wire with a crocodile clip
connector in order to prevent against damage on the cored bar.)
* When supplying developer, do not tilt the developing unit.
b. DV seal /
c. DV side seal F /
d. DV side seal R
1)
Remove the old DV seal (A), DV side seal F (B), R (C).
2)
Attach the new DV seal (A), DV side seal F (B), DV side seal R
(C) to the reference position.
* When attaching, arrange so that the DV side seal F (C) and the
DV side seal R (D) are placed between the DV cover R (A) and
the DV blade (B).
1
Magnet roller
rear side cored bar
A
B
C
0
0.3mm
0
0.3mm
0
0.3mm
0
0.3mm
0
0.5mm
A
B
C
0
0.3mm
A
B
C
D
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  • DOWNLOAD Sharp MX-1800N (serv.man31) Service Manual ↓ Size: 1.61 MB | Pages: 5 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp MX-1800N (serv.man31) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp MX-1800N (serv.man31) Copying Equipment. Information contained in Sharp MX-1800N (serv.man31) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.