Poor Fusing Performance - Samsung MULTIXPRESS CLX-9251 Series Service Manual

4. Troubleshooting

4.6.12. Poor fusing performance

A. Typical faulty images
B. Troubleshooting procedure
Step Cause
1 Check the paper type.
Depending on what type of paper used, print speed
varies.
(ex)
Plain (71~90g/), Thick (91~105g/) : Full Speed
•
Heavy weight (106~175g/) : Half Speed
•
• Envelope (75~90 g/), Label (120~150 g/) : Half
Speed
2 The fuser unit is worn out.
3 Check if the surface of the fuser belt & pressure roller
is scratched.
4 Check if the temperature control system has problems.
Thermistor is broken or operates abnormally
•
Halogen lamp is broken or operates abnormally.
•
5 Check if the pressure control system operates properly.
6 Paper is wrapped on the Heating roller.
4-219
Action
Check the paper type on control panel is same as paper
user uses.
(Refer to 2.2.7.)
Replace the fuser unit.
Replace the fuser unit.
Check the Non-contact thermistor sensor.
Check the Halogen lamp.
(Refer to 4.5.7. U1–2113)
If you find some problems, replace the broken parts or
Fuser unit.
Check the pressure control system.
(Refer to 4.5.7. U1–2115)
The problem persists, replace Fuser unit.
Remove a wrapped paper and print the demo page.
If there are some problems on the printout, replace Fuser
unit.
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