HAKUBA 26PPM Laser Printer - Base Engine Technical Manual
5-5
Version 1.0
Primary FIPs:Image Quality Problems
5.1 Light (Undertoned) Prints
PROBLEM
The overall image density is too light.
INITIAL ANALYSIS
1. Inspect the following components. Are they compatible with your printer
version, correctly installed, not damaged, deformed, or contaminated?
• CRU
• HVPS
• Spring Clip
• BTR Assy
• Chute Trans Assy
• ROS Assy
• PWB HKB26 MCU
• Harness Assy Conn (J23-J231)
• PWBA HKB PS
• Fuser Assy
• Harness Assy Fuser-M (J271, J11, J27, J262)
• Cover Assy Front
2. Inspect the printer paper path. Is it clear of foreign matter such as staples,
paper clips, and paper scrap?
Step
Actions and Questions
Yes
No
1
PAPER CONDITIONS
Is there moisture in the paper?
Load fresh,
dry paper.
Go to step 2
2
DRUM GROUND
Check the Drum Ground Path:
Drum>Drum Shaft Pin>Spring Clip > Frame.
Is the Drum Ground Path complete?
Go to step 3
Re-establish
the Drum
Ground Path
3
LASER BEAM PATH
Inspect the laser beam path, between the
ROS Assy
and the
Drum, for contamination or obstructions.
Is the laser beam path free of obstacles?
Go to step 4
Remove
obstructions
or contamina-
tion.
4
BTR ASSY
Inspect the BTR Assy for contamination.
Is the BTR free of contamination?
Go to step 5
Replace the
BTR Assy
engine fip5001FA
Summary of Contents for b 6100
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