DOWNLOAD Sharp MX-1800N (serv.man29) Service Manual ↓ Size: 2.49 MB | Pages: 5 in PDF or view online for FREE

Model
MX-1800N (serv.man29)
Pages
5 Few pages! See other manuals at the bottom of the first or last page.
Size
2.49 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Details of each Section - i Photoconductor Section
File
mx-1800n-sm29.pdf
Date

Sharp MX-1800N (serv.man29) Service Manual ▷ View online

MX-1800N  PHOTOCONDUCTOR SECTION  i – 1
MX-1800N
Service Manual
 
[i] PHOTOCONDUCTOR SECTION
1. Electrical and mechanism relation diagram
CN9
B3P-PH-K-S
AC
PWB
CN1
MC-K
GB-K
GB-C
B6P-PH-K-S
CN26
CN2
1TC_CL
3
GB-M
HV_REM
7
MC_YMC
6
1TC_K
5
B32B-PHDSS-B
1TC_YMC
4
GB-Y
P-GND
2
INT24V2
1
B7P-PH-K-S
MC-CMY
CN1
INT24V2
7
P-GND
6
1TC_YMC
4
1TC_K
3
MC_YMC
2
HV_REM
1
1TC_CL
5
B7P-PH-K-S
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
1st TC PWB
P-GND
/HV_DATA#
DL_BK
PHNR-10-H,BU10P-TR-P-H
CN15
53254-0310
DL_C
PHNR-10-H,BU10P-TR-P-H
53254-0310
DL_M
PHNR-10-H,BU10P-TR-P-H
53254-0310
DL_Y
PHNR-10-H,BU10P-TR-P-H
53254-0310
B40B-PADSS-B
9
D
-GND
2
9
D
-GND
2
DL_M#
D-GND
2
DL_BK#
3
10
1
9D
-G
N
D
D-GND
D-GND
D-GND
DL_C#
10
3
9
1
DL_BK#
D-GND
DL_Y#
1
DL_Y#
3
10
DL_C#
1
3
1
2
DL_BK#
1
DL_C#
21
1
D-GND
DL_M#
2
24
D-GND
DL_Y#
D-GND
22
1
4
DL_M#
3
10
1
PCU PWB
23
D-GND
RS
M
6
P
CN1
B12B-PH-K-S
DRIVER
SUB PWB
6
8
7
INT24V1
10
4
12
INT24V1
9
11
INT24V1
3
DMCLA/
4
1
6
INT24V1
DMCLB/
DMCLB//
DMCLB//
1
3
DMBKA//
55
2
INT24V1
INT24V1
2
3
4
6
1
Ą
DMBKA/
1
DMBKB/
DMBKB//
DMBKA/
DMBKB//
DMBKB/
DMBKA//
DMCLA//
INT24V1
5
DMCLA//
6
INT24V1
5
2
DMCLA/
4
DMCLB/
3
2
DL_BK
DL_C
DL_M
MC
GB
DMCL
DMBK
DL_Y
GB
GB
GB
2
1
2
MC
MC
MC
1
1
1
MX-1800N  PHOTOCONDUCTOR SECTION  i – 2
2. Operational descriptions
A. OPC drum section
The OPC drum surface is negatively charged by the main charger.
The laser beam images are radiated to the OPC drum surface by
the laser (writing) unit to form latent electrostatic images.
1) The OPC drum surface is negatively charged by the main
charger.
The main charger grid is provided with the screen grid. The
OPC drum is charged at a voltage virtually same as the volt-
age applied to the screen grid.
2) LED lights are radiated to the OPC drum surface by the laser
(writing) unit to form latent electrostatic images.
When LED lights are radiated to the OPC drum CGL, negative
and positive charges are generated.
Positive charges generated in CGL are attracted to the nega-
tive charges on the OPC drum surface. On the other hand,
negative charges are attracted to positive charges in the alumi-
num layer of the OPC drum.
Therefore, positive charges and negative charges are bal-
anced out on the OPC drum and in the aluminum layer, reduc-
ing positive and negative charges to decrease the OPC drum
surface voltage.
Electric charges remain at a position where LED lights are not
radiated.
As a result, latent electrostatic images are formed on the OPC
drum surface.
3)
After transfer operation, remaining toner is removed by the
cleaning blade.
Toner removed from the OPC drum surface is transported to
the waste toner section by the waste toner transport screw.
4)
The whole surface of the OPC drum is discharged.
By radiating the discharge lamp light to the discharge lens,
light is radiated through the lens to the OPC drum surface.
When the discharge lamp light is radiated to the OPC drum
CGL, positive and negative charges are generated.
Positive charges generated in CGL are attracted to the nega-
tive charges on the OPC drum surface. On the other hand,
negative charges are attracted to positive charges in the alumi-
num layer of the OPC drum.
Therefore, positive and negative charges are balanced out on
the OPC drum surface and in the aluminum layer, reducing
positive and negative charged to decrease the surface voltage
of the OPC drum.
Signal name
Name
Function/Operation
DMCL
Drum motor (Color)
Color photoconductor drive
DMBK
Drum motor (Black)
Black photoconductor drive
DL
Discharge lamp (Y, M, C, BK)
Light is passed to the discharge lens to drive the OPC drum surface.
MC
Main charge (Y, M, C, K)
The OPC drum surface is charged negatively.
GB
Grid (Y, M, C, K)
The OPC drum surface potential is controlled. 
No.
Name
Function/Operation
1
OPC drum (Y, M, C, K)
Latent electrostatic images are formed. 
2
Cleaning blade
Residual toner is cleaned and removed from the OPC drum surface.
Aluminum
layer
OPC drum
CTL
CGL
High voltage unit
Main corona unit
Screen grid
LED lights
Aluminum
layer
OPC drum
OPC drum
CGL
CTL
Lens
CGL
CGL
Aluminum
layer
Aluminum
layer
CTL
CTL
MX-1800N  PHOTOCONDUCTOR SECTION  i – 3
3. Disassembly and assembly
A. Process drum unit
(1) Each color drum unit
1) Open the front cover.
2)
Remove the waste toner bottle unit.
3)
Loosen the blue screw. Check to confirm that lock is released,
and open the drum positioning unit.
NOTE: When the transfer belt tension of the primary transfer
unit is released manually, turn on the power again after com-
pletion of the work. (Power OFF-ON) This procedure initializes
the transfer roller to return it to the home position.
4)
Loosen the fixing screw of the developing unit on the left side
of each color drum unit.
5)
Remove the developing unit with both hands.
Unit
Parts
Maintenance
(1)
Drum unit
a
Drum
b
Main charger unit
c
Side seal F, R
d
Toner reception seal
e
Cleaner blade
(2)
Others
a
Waste toner drive motor
b
Waste toner full detection switch
(1)-e
(1)-a
(1)-d
(1)-c
(1)-b
(1)-c
(1)
(2)-a
(2)-b
1
2
MX-1800N  PHOTOCONDUCTOR SECTION  i – 4
6) Hold the lock lever, and pull out each color drum unit slowly,
and support the lower section of the unit with both hands to
remove.
a. OPC drum
1) Remove each drum unit from the machine.
2) Remove the screws and remove the DR fixing shaft AS.
3) Slide the OPC drum to the front side, and lift the drum rear
side, and remove the OPC drum from the hole in the front sec-
tion.
b. Main charger unit
1) Remove each drum unit from the machine.
2) Remove the OPC drum.
3) Remove the screws, and remove the MC cover.
4)
Disengage the lock pawl with a screwdriver, and remove the
MC cleaner shaft. 
5)
Release the pawl, and remove the process cover. Remove the
Main charger unit.
c. Side seal F, R /
d. Toner reception seal
1)
Remove each drum unit from the machine.
2)
Remove the OPC drum.
3)
Remove the MC charger unit.
4)
Remove the side seal F/R and the toner reception seal.
* When attaching the side seal F/R and the toner reception
seal, arrange so that they are in the ranges specified in the
figure below.
1
2
1
2
1
2
1
2
3
0 - 0.5mm
0 - 0.5mm
0 - 0.5mm
0 - 0.3mm
0 - 0.3mm
0 - 0.3mm
Reference
line
Reference line
Reference line
Reference line
Reference line
Reference
line
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  • DOWNLOAD Sharp MX-1800N (serv.man29) Service Manual ↓ Size: 2.49 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.man29) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp MX-1800N (serv.man29) Copying Equipment. Information contained in Sharp MX-1800N (serv.man29) 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.