Sharp MX-6500N / MX-7500N (serv.man23) Service Manual ▷ View online
MX-7500N MAINTENANCE 9 – 10
Memo:
Note for cleaning the image registration/density sensor
When in maintenance or in case of a service call, refer to "Criteria for necessity of cleaning" below to judge the necessity of cleaning the image
registration/density sensor. If it is judged that cleaning is necessary, then perform cleaning.
registration/density sensor. If it is judged that cleaning is necessary, then perform cleaning.
Criteria for necessity of cleaning
- The SIM44-2 “D” - “F”, “pcs_*_LED ADJ value” is increased by aging or dirt of the image density sensor.
- When the image density is decreased, execute Sim44-2.
Then execute SIM46-74”Copy color balance adjustment (Auto adjustment)/Printer color balance adjustment””.
Greasing
Greasing is not always required for every maintenance. In the following cases, check and grease.
- When there are some noises.
- When a lot of jams occur frequently. (Check the jam history.)
Cleaning of sensors and detectors in the paper feed/transport system
Cleaning of sensors and detectors in the paper feed/transport system is not always required for every maintenance. In the following cases,
check and clean.
check and clean.
- When a trouble or a jam occurs due to a sensor or a detector. (Check the jam history.)
Torque limiter check and replacement
Torque limiter check and replacement is not always required for every maintenance. In the following cases, check and replace.
- When there are some noises.
- When a lot of jams occur frequently. (Check the jam history.)
Alcohol for cleaning
Be sure to use ethanol for cleaning.
Cleaning of the primary transfer mode detector (CL/BK)
- When replacing the OPC drum, remove the primary transfer unit and the developing unit, and clean them.
- Blow air to the light emitting section and light receiving section to remove the attached toner.
- Blow air also when the sensor is wiped and cleaned with waste cloth.
MX-7500N MAINTENANCE 9 – 11
A. DSPF section
X: Check (Clean, replace, or adjust according to necessity.)
O: Clean
: Replace
: Adjust
: Lubricate
Unit
No.
Maintenance parts
When
calling
Every
200K
Every
300K
Every
400K
Every
600K
Every
1500K
Remark
Document feed
tray unit
tray unit
1
Sensors
X
X
For the reflection-type sensor, the other side
must be also cleaned.
must be also cleaned.
Document feed
unit
unit
2
Document pickup roller
O
O
Replace according to each paper feed counter
value: Replace at 100K or after one-year use.
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.
must be also cleaned.
Lamp unit
5
Second scan section,
scanning glass
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.
value: Replace at 100K or after one-year use.
12
Torque limiter
X
X
Replace according to each paper feed counter
value: 800K
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
white reference glass
O
O
21
Discharge brush
X
X
Replacement reference:
When the brush bundle is remarkably deformed.
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.
must be also cleaned.
Drive unit
24
Gears
X
X
Apply to the specified position as needed when
checking. (UKOG-0299FCZZ)
checking. (UKOG-0299FCZZ)
25
Belts
-
X
Transport drive unit
26
Belts
-
X
MX-7500N MAINTENANCE 9 – 12
1
2
21
23
8
3
12
4
4
16
20
22
24
25
25
26
23
23
17
18
19
5
8
7
10
13
23
24
24
25
26
23
14
15
11
9
6
MX-7500N MAINTENANCE 9 – 13
B. Scanner section
X: Check (Clean, replace, or adjust according to necessity.)
O: Clean
: Replace
: Adjust
: Lubricate
Unit
No.
Maintenance parts
When
calling
Every
200K
Every
300K
Every
400K
Every
600K
Every
1500K
Remark
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.
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
12
4
5
5
7
9
3
2
6
8
11
6
1
10
3
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