MX-6500N, MX-7500N (serv.man23). Section 9 Maintenance — Sharp Copying Equipment Service Manual (repair manual)

Model
MX-6500N MX-7500N (serv.man23)
Pages
32
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4.5 MB
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PDF
Document
Service Manual
Brand
Device
Copying Equipment / Section 9 Maintenance
File
mx-6500n-mx-7500n-sm23.pdf
Date

View Sharp MX-6500N / MX-7500N (serv.man23) Service Manual online

MX-7500N  MAINTENANCE  9 – 1
MX-7500N
Service Manual
 
[9] MAINTENANCE
1. Works necessary when executing the maintenance
A. Counter check
Before execution of the maintenance, execute SIM22 to check the
counter values of the following counters to confirm consuming
states of each section.
1)
Each consumable part counter
2)
Each unit counter
3)
Trouble counter, JAM counter
B. Counter reset
When a part or consumable part is replaced with new one in the
maintenance, execute SIM24 to reset the following counters.
1)
Maintenance counter
2)
Each consumable part counter
3)
Each unit counter
4)
Trouble counter, JAM counter
C. Firmware version check and upgrading
Execute SIM22-5 to check the firmware version, and upgrade it as
needed. (SIM49-1)
D. Confirmation, adjustment
After completion of part replacement and cleaning, etc, execute the following procedures.
Items necessary to execute
Items to execute as needed
Item
SIM to be used
ADJ 4
Print engine image distortion adjustment / 
OPC drum phase adjustment / 
Color registration adjustment 
(Print engine section)
ADJ 4A
Print engine image distortion adjustment (Manual adjustment) / 
OPC drum phase adjustment (Automatic adjustment) / 
Color registration adjustment (Automatic adjustment)
50-22
ADJ 9/SET1
Color balance/density adjustment
Copy image quality check
Printer image quality check
ADJ 9B
Copy/Printer color balance and density adjustment 
(Automatic adjustment) (Basic adjustment)
46-74
Item
SIM to be used
ADJ 2
High voltage adjustment
ADJ 2A
Adjust the main charger grid voltage
8-2
ADJ 2B
Adjust the developing bias voltage
8-1
ADJ 2C
Transfer current/voltage adjustment
8-6
ADJ 3
Image lead edge position, image loss, void 
area, image off-center, image magnification 
ratio adjustments (Automatic adjustments)
ADJ 3A
Print image main scanning direction automatic magnification 
ratio adjustment (Print engine)
50-28
ADJ 3B
Print image off-center automatic adjustment (Print engine) 
(Each paper feed tray)
50-28
ADJ 3C
Copy mode image lead edge position, image loss, void area, 
image off-center, sub scanning direction image magnification 
ratio automatic adjustment (Scanner) (Document table mode)
50-28
ADJ 3D
DSPF mode image off-center, image lead edge position, sub 
scanning direction image magnification ratio auto adjustment
50-28
ADJ 9/SET1
Color balance/density adjustment
ADJ 9A
Scanner calibration (CCD calibration) 
63-3 (63-5)
MX-7500N  MAINTENANCE  9 – 2
2. Display of maintenance execution timing
The message of maintenance execution timing is displayed when each counter reaches the set value.
The display content is "Maintenance execution timing Code: 
."
The relations between the messages and the counters are shown below.
A. Maintenance counter
* After execution of maintenance, be sure to execute SIM24-4 to clear the maintenance counter (Total) and the maintenance counter (Color).
B. Primary transfer unit
* After execution of the maintenance, execute SIM24-4 to clear the primary transfer unit print counter, the accumulated number of rotations
counter, and the use day counter.
C. Secondary transfer unit
* After execution of the maintenance, execute SIM24-4 to clear the secondary transfer print counter, the accumulated number of rotations
counter, and the use day counter.
D. Fusing unit
* After execution of the maintenance, execute SIM24-4 to clear the fusing roller counter, the fusing belt counter, the fusing web print counter,
the accumulated rotation number counter, and the use day counter.
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
TA
Maintenance counter (Total)
When the set value of SIM21-1 is reached, or when 
90% of the set value of SIM21-1 is reached.
0 (Print continue)
Enable
1 (Print stop)
CA
Maintenance counter (Color)
When the set value of SIM21-1 is reached, or when 
90% of the set value of SIM21-1 is reached.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
TK1
Primary transfer unit print counter
When 300K is reached.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
TK2
Secondary transfer unit print 
counter
When 300K is reaches.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
FK1
Fusing belt print counter
When 300K is reached.
0 (Print continue)
Enable
1 (Print stop)
FK2
Pressure roller print counter
When 300K is reached.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
SIM26-38-B set value
Print JOB Enable/Disable
FK3
Fusing web send counter
When 300K is reached.
0 (Print continue)
Enable
1 (Print continue)
FK3
Fusing web send counter
When the fusing web end detection is ON.
0 (Print continue)
Enable
1 (Print stop)
Disable
MX-7500N  MAINTENANCE  9 – 3
E. OPC drum
* After execution of the maintenance, execute SIM24-4 to clear the OPC drum print counter, the accumulated number of rotations counter, and
the use day counter.
F. Developer
* After execution of the maintenance, execute SIM24-4 to clear the developer print counter, the accumulated number of rotations counter, and
the use day counter.
G. Waste toner box
* When the waste toner box is replaced with an empty one, the message disappears.
H. Toner cartridge
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
DK
OPC drum print counter (K)
OPC drum accumulated number of rotations (K)
When 300K sheets is reached, or 
when 1,000K rotations is reached.
0 (Print continue)
Enable
1 (Print stop)
D (C/M/Y)
OPC drum print counter (C/M/Y)
OPC drum accumulated number of rotations (C/M/Y)
When 200K sheets is reached, or 
when 1,000K rotations is reached.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
SIM26-38-A set value
Print JOB Enable/Disable
VK
Developer print counter (K)
DV unit accumulated number of rotations (K)
When 600K sheets is reached, or 
when 2,000K rotations is reached.
0 (Print continue)
Enable
1 (Print stop)
V (C/M/Y)
Developer print counter (C/M/Y)
DV unit accumulated number of rotations (C/M/Y)
When 400K sheets is reached, or 
when 2,000K rotations is reached.
0 (Print continue)
Enable
1 (Print stop)
Code
Counter name
Display condition
Display message
SIM26-38-A
set value
Print JOB
Enable/Disable
When near end is detected.
Waste toner full 
detection switch ON
Replacement timing of the 
toner collection container is 
approaching.
No relation
Enable
The pixel count from near end reaches 
the specified value.
Specified pixel count
Replace the waste toner 
collection box.
No relation
Disable
Code
Counter name
Display condition
Display message
SIM26-38-A
set value
Print JOB
Enable/Disable
Toner motor rotation time
Specified time of 
rotations
(K/C/M/Y) Prepare a toner 
(Near near end)
No relation
Enable
Toner supply amount is decreasing.
Toner remaining 
quantity sensor output
(K/C/M/Y) Replace the toner 
cartridge. (Near end)
No relation
Enable
The Hopper Remaining Toner after 
detection of near end reaches the 
specified level.
Specified hopper 
remaining count
Replace the toner cartridge. 
(K) (End)
No relation
Disable for a JOB which 
requires K toner
The Hopper Remaining Toner after 
detection of near end reaches the 
specified level.
Specified hopper 
remaining count
Replace the toner cartridge. 
(C/M/Y) (End)
No relation
Enable for monochrome, 
Disable for color
MX-7500N  MAINTENANCE  9 – 4
3. Maintenance list
X: Check (Clean, replace, or adjust according to necessity.)
O: Clean
: Replace
: Adjust
 : Lubricate
Section
Unit
No.
Maintenance parts
When 
calling
200K
300K
400K
600K
2000K
3000K
Remark
DSPF 
section
Document 
feed tray unit
1
Sensors
X
X
For the reflection-type sensor, the 
other side must be also cleaned.
Document 
feed unit
2
Document pickup roller
O
O
Replace according to each paper 
feed counter value: Replace at 100K 
or after one-year use.
3
Paper feed roller
O
O
4
Sensors
X
X
For the reflection-type sensor, the 
other side must be also cleaned.
Lamp unit
5
Second scan section, 
scanning glass
O
O
6
Reflector
O
O
7
Scanner lamp
O
O
Air-blow the LED section.
Optical unit
8
Mirror
O
O
9
Lens
O
O
10
CCD
O
O
DSPF unit
11
Separation roller
O
O
Replace according to each paper 
feed counter value: Replace at 100K 
or after one-year use.
12
Torque limiter
X
X
Replace according to each paper 
feed counter value: 800K
13
No. 1 registration roller
O
O
14
Transport roller 1
O
O
15
No. 2 registration roller
O
O
16
Transport roller 2
O
O
17
Transport roller 3
O
O
18
Paper exit roller
O
O
19
No. 1 scanning plate
O
O
20
No. 2 scanning section 
white reference glass
O
O
21
Discharge brush
X
X
Replacement reference: 
When the brush bundle is 
remarkably deformed.
22
OC mat
O
O
23
Sensors
X
X
For the reflection-type sensor, the 
other side must be also cleaned.
Drive unit
24
Gears
X
X
Apply to the specified position as 
needed when checking. 
(UKOG-0299FCZZ)
25
Belts
-
X
Transport 
drive unit
26
Belts
-
X
Scanner 
section
Scanner unit
1
Table glass
O
O
2
SPF  glass
O
O
3
Rails
Apply to the specified position.
4
Drive  belt
X
X
5
Drive wire
X
X
6
Sensors
X
X
For the reflection-type sensor, the 
other side must be also cleaned.
Lamp unit
7
Mirror
O
O
8
Reflector
O
O
9
Scanner lamp
O
O
Air-blow the LED section.
Mirror unit
10
Mirror
O
O
CCD unit
11
Lens
O
O
12
CCD
O
O
Tray 
paper 
feed 
section
Tandem 
paper feed 
tray
1
Paper pickup roller
X
O
Replace according to each paper 
feed counter value: Replace at 200K 
or after one-year use.
2
Paper feed roller
X
O
3
Separation roller
X
O
4
Torque limiter
X
X
Replace according to each paper 
feed counter value: 800K
5
Sensors
X
X
For the reflection-type sensor, the 
other side must be also cleaned.
-
Solenoid(T1PUS)
X
X
Replace every 3000K.
-
Solenoid(T1PUS)
X
X
Replace every 3000K.
-
Transport paper guides
O
O
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