MX-3500N, MX-3501N, MX-4500N, MX-4501N (serv.man122). 053-COUNTERMEASURES AGAINST SCRATCHES ON UPPER AND LOWER HEAT ROLLER SURFACES OF FUSING UNIT. - Sharp Copying Equipment Technical Bulletin (repair manual)

mx-3500n, mx-3501n, mx-4500n, mx-4501n (serv.man122) technical bulletin
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MX-3500N MX-3501N MX-4500N MX-4501N (serv.man122)
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Technical Bulletin
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Device
Copying Equipment / 053-COUNTERMEASURES AGAINST SCRATCHES ON UPPER AND LOWER HEAT ROLLER SURFACES OF FUSING UNIT.
File
mx-3500n-mx-3501n-mx-4500n-mx-4501n-sm122.pdf
Date

Read Sharp MX-3500N / MX-3501N / MX-4500N / MX-4501N (serv.man122) Technical Bulletin online

Sharp Electronics (UK) Ltd., Technical Services Group
CCE-402
1. Model Name
MX3500N – MX4500N – MX3501N – MX4501N
2. Symptom
Continuously using the heat roller after the surface has been scratched during jam
clearance of the fusing unit section will enlarge the scratch. This enlargement may cause
a crack to occur in the coating on the heat roller surface.
3. Description
We will change the thickness of the tubes (coating) on the upper and lower heat roller
surfaces from 30  to 50  so that a scratch does not occur easily. Due to this change,
paper detachability also decreases, so we will simultaneously change the rubber hardness
of the lower heat roller from 40  to 65 .
For this reason, if it becomes necessary to replace the upper or lower heat roller, you will
need to simultaneously replace both the rollers as a pair with new ones.
Identifying new and old heat rollers
Upper heat roller
Temporary countermeasure: Mark the edge of the long boss side (fusing gear mounting
side) in black.
Permanent countermeasure: Add a groove to the root of the long boss side (fusing gear
mounting side).
COUNTERMEASURES AGAINST SCRATCHES ON UPPER
AND LOWER HEAT ROLLER SURFACES OF FUSING UNIT.
TECHNICAL BULLETIN
Date:
11
th
 April 2007
Model: 
MX3500N – MX4500N
MX3501N – MX4501N
Ref.:
053
Colour: 
White
Page:
1 of 2
Sharp Electronics (UK) Ltd., Technical Services Group
CCE-402
Lower heat roller
Temporary countermeasure: Mark the edge of the boss with a groove in black.
Permanent countermeasure: Add grooves to both the sides of the boss.
4. Action
Machine: From mid-October 2006 production
Kit: From November 2006 production
5. Parts Action
Current parts
New parts
Ref.
No.
Model
name
Version
P/G No.
Parts code
Parts code
Price
rank
Parts name
Effective
time
Inter-
change-
ability
Number
31-42
NROLI1572FCZ1
NROLI1572FCZ2
Upper heat
roller
32-13
NROLI1571FCZ3
NROLI1718FCZZ
BR
Lower heat
roller
1
MX-3500N
MX-3501N
MX-4500N
MX-4501N
ALL
32-502
CROLI1571DS53
CROLI1718DS51
BS
Lower heat
roller unit
2006/10
Mid
3
1
<Interchange>
1. Interchangeable.
4. Not interchangeable.
2. Current type can be used in place of new type.
New type cannot be used in place of current type.
5. Interchangeable if replaced with same types of
related parts in use.
3. Current type cannot be used in place of new type.
New type can be used in place of current type.
6. Others.
Parts marked with "
" is important for maintaining the safety of the set. Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
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