Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 227 / 987

Laser Exposure System
Removing the Laser Scanner Unit
■ Preparation
1. Pull out the ITB Unit for about 10 cm.
If your hand or the PCB comes in contact with the ITB Cleaning Unit when removing the Primary Transfer High-voltage PCB
Unit in step 6, the ITB may be damaged.
2. “Removing the Waste Toner Container” on page 221
3. “Removing the Drum Unit (Y/M/C/Bk)” on page 222
4. “Removing the Rear Cover 1” on page 140
5. “Removing the Left Lower Cover” on page 144
6. “Removing the Primary Transfer High-voltage PCB Unit” on page 197
■ Procedure
CAUTION:
• Be sure not to disassemble the Laser Scanner Unit because adjustment is required.
• Disassembling the unit may cause functional problems.
• Do not touch the toner outlet [A] because the toner may be scattered when disassembling/assembling.
[A]
1. Remove the Shutter Link Unit [1].
• 1 Boss [2]
• 3 Hooks [3]
[1]
[2]
[3]
[3] [3]
4. Parts Replacement and Cleaning
216