L2: Pressure Roller Separation Finger; L3, L4: Pressure Roller Thermistor - Toshiba e-STUDIO 5540C Service Manual

1. Handling precautions
Pressure roller
- Do not leave any oil (fingerprints, etc.) on the pressure roller.
- Be careful not to allow any hard object to hit or rub against the pressure roller, or it may be
damaged, possibly resulting in poor cleaning.
Fuser belt
- Be careful not to fold the surface of the fuser belt.
- Do not touch the fuser belt surface with bare hands.
- Prevent oil or other foreign matter from staining the fuser belt surface.
- Do not apply external pressure that might scratch the fuser belt.
2. Cleaning procedure
When the fuser belt and pressure roller become dirty, they will cause jamming. If this
happens, wipe the surface clean with a suitable cloth. For easier cleaning, clean the belt and
roller while they are still warm.
However, toner adhering to and hardened on the surface of the fuser belt or the pressure
roller may not be cleaned out only with dry cloth.
In this case, use alcohol (e.g. ethanol) to clean it. If the toner is still not removed completely,
use a toner remover.
When using alcohol or a toner remover, soak soft cloth in it and wipe over the surface.
Notes:
• Be careful not to rub the fuser belt and pressure roller surface with your nails or hard objects
because it can be easily damaged. Do not use silicone oil on the fuser belt and pressure
roller.
• If alcohol or a toner remover has been used, trail marks may be left. In this case, remove
them by wiping with dry cloth.
• Be careful not to make any scratch, dent or crease on the surface of the pressure roller.
3. Checking
- Check for stain and damage on the fuser belt and pressure roller, and clean if necessary.
- Check the separation plate and fingers and check for chipped tips.
- Check the thermistors contact and non-contact status.
- Check the fused and fixed condition of the toner.
- Check the gap between the inlet guide and pressure roller.
- Check the fuser belt for proper transportation.
- Check the pressure roller for proper rotation.
4. Checking after the assembly of the fuser belt unit
After the assembly, rotate the fuser belt for a round to confirm that the belt is neither folded
nor scratched.
A folded or scratched belt may be broken when it is in use.
Notes:
Never rotate the fuser belt in the reverse direction as it will cause deformation of the thermistor
and discharge brush.

* L2: Pressure roller separation finger

The paper jam may be caused if the tip of the finger is damaged or deformed. If there is any
problem with it, replace the finger with a new one regardless of the number of output pages
which have been made. Do not damage the tip of the finger during the cleaning. The finger may
be damaged if the toner adhering to the tip of it is scraped off forcibly. Replace the finger if the
toner is sticking to it heavily.

* L3, L4: Pressure roller thermistor

Clean the thermistor with alcohol if the toner or dirt is sticking to it when the fuser belt is replaced.
Do not deform or damage the thermistor during the cleaning. Replace the thermistor with a new
one if it is damaged or deformed regardless of degree.
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
PREVENTIVE MAINTENANCE (PM)
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