5-16
HAKUBA 26PPM Laser Printer - Base Engine Technical Manual
Version 1.0
Primary FIPs:Image Quality Problems
5.9 Spot Deletions
PROBLEM
There are areas of the image that are extremely light or missing entirely.
These missing areas form spots that are localized to small areas of the page.
INITIAL ANALYSIS
1. Inspect the following components. Are they compatible with your printer
version, correctly installed, not damaged, deformed, or contaminated?
• CRU
• BTR Assy
• Fuser Assy
• Pressure Roll Assy
• Heat Roll
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?
Is the paper wrinkled?
Replace with
fresh, dry
paper.
Go to step 2
2
BTR Assy
Inspect the BTR Assy for contamination.
Is the
BTR
free of contamination?
Go to step 3
Replace the
BTR Assy
3
CRU
FAILURE
Replace the
CRU
with a new one.
Is the problem solved?
Problem
solved
Go to step 4
4
HEAT ROLL DAMAGE
Do the spot deletions occur at intervals of approximately
62.0mm?
Replace the
Heat Roll
Go to step 5
5
PRESSURE ROLL DAMAGE
Do the spot deletions occur at intervals of approximately
61.0mm?
Replace the
Pressure Roll
Assy
Return to Ini-
tial Analysis
engine fip5007FA
Summary of Contents for b 6100
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