Large Curl Of Paper; Jam With Thin Paper (63G/Cm2 Or Lighter); The Toner Bottle Set Lever Cannot Be Operated Or Is Hard To Operate - Canon imageRUNNER 1750 Series Service Manual

■ Large curl of paper

[Location]
Fixing Assembly
[Cause]
Excess heat from fixing changes moisture content between the front and back of paper, which
causes large curl.
[Condition]
Paper left untouched in a high humidity environment
[Field Remedy]
- User mode > Cleaning/Adjustment > Special Mode N > Manual; select "Medium" or "Strong"
*Select "Medium" under normal conditions. Selecting "Strong" causes drop in productivity.
- Standard Cassette Heater: Turn ON the heater power supply
- Attach an option Cassette Heater.
■ Paper jam in solid image when the leading edge margin is small
(1 to 4mm)
[Location]
Fixing Assembly
[Cause]
When handling a solid image with small leading edge margin (1 to 4mm), it causes poor
paper separation from the Fixing Film and paper jam can occur by separation failure.
[Condition]
Paper left untouched in a high humidity environment, solid image with small leading edge
margin
[Field Remedy]
- User mode > Cleaning/Adjustment > Special Mode O; select ON
Or,
- User mode > Cleaning/Adjustment > Special Mode N > Manual; select "Strong"
*Selecting Special Mode O or N > Strong makes a wider leading edge margin and avoids
paper jam by separation failure.
* Selecting Special Mode N > Strong also improves paper curl; however, it reduces
productivity
6
Troubleshooting > Troubleshooting items > Image Failure > The toner bottle set lever cannot be operated or is hard to operate.
6 Troubleshooting > Troubleshooting items > Image Failure > The toner bottle set lever cannot be operated or is hard to operate.

■ Jam with thin paper (63g/cm2 or lighter)

[Location]
Photosensitive Drum, Fixing Assembly
[Cause]
Separation performance drops due to weak rigidity of paper, which causes paper jam at the
Cleaner Assembly or Fixing Assembly by separation failure.
[Condition]
When using thin paper lighter than 64g/cm2
[Field Remedy]
- User mode > Cleaning/Adjustment > Special Mode P; select "Medium" or "Strong"
*When using 52g/cm2 paper, "Strong" must be selected.
■ The toner bottle set lever cannot be operated or is hard to
operate.
[Location]
Toner bottle set lever
[Cause]
• When sealing force of the Toner Bottle Cap is large although it is within the specified range,
the lever operation force to open/close the cap can be large.
• The toner bottle has not been fully pushed into the rear to hear a sound.
[Condition]
• When opening a new toner bottle cap that has large sealing force although it is within the
specified range
• When repeatedly setting a bottle that contains toner in an undesirable manner
[Field Remedy]
• Once the toner bottle set lever rotates by approximately 45 degrees, pulling the toner bottle
while rotating the set-on lever can easily set the toner bottle.
• Operate the lever after the toner bottle is securely pushed into the rear.
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