Poor Transfer Of The Image, Hollow Character; Image Smear/Toner Bleed/Condensation - Canon imageRUNNER 1750 Series Service Manual

[Cause]
• Pre-transfer Guide: The leading edge or trailing edge of paper touches the toner adhered to
the Pre-transfer Upper Guide.
• Fixing Inlet Guide: The leading edge or trailing edge of paper touches the toner adhered to
the Fixing Inlet Upper Guide.
[Condition]
When a high print chart, such as halftone or black, is continuously fed.
[Field Remedy]
Clean the toner-adhered Guide with lint-free paper.

■ Poor transfer of the image, hollow character

[Location]
Transfer Roller (roller circumference: 50mm)
[Cause]
• Because of insufficient transfer output due to highly-resistive paper caused by reduced
moisture content in paper by having the paper left untouched in a low humidity environment
• Because of insufficient transfer output due to highly-resistive paper caused by increased
moisture content in paper by having the paper left untouched in a high humidity
environment
6
Troubleshooting > Troubleshooting items > Image Failure > Image smear/toner bleed/condensation
F-6-8
6 Troubleshooting > Troubleshooting items > Image Failure > Image smear/toner bleed/condensation
[Condition]
• Paper left untouched in a low humidity environment
• Paper left untouched in a high humidity environment
[Field Remedy]
• User mode > Cleaning/Adjustment > Special Mode M; select "Strong" or "Weak"

■ Image smear/toner bleed/condensation

[Location]
Photosensitive Drum (circumference:94mm)
[Cause]
Discharge products generated from the Charging Roller adhere to the Drum, attract water
molecules and cause low resistance, which loses the ability to create the desired latent
F-6-9
image, resulting in bleed text image.
[Condition]
The first operation in the day under a high temperature and high humidity environment
[Field Remedy]
• User mode > Cleaning/Adjustment > Special Mode F; select "MODE1", "MODE2" or
"MODE3"
• Install an option Drum Heater
6-8
F-6-10
6-8