5-12
HAKUBA 26PPM Laser Printer - Base Engine Technical Manual
Version 1.0
Primary FIPs:Image Quality Problems
5.6 Horizontal Band Deletions
PROBLEM
There are areas of the image that are extremely light or missing entirely.
These missing areas form wide bands that run horizontally across the page,
parallel with the direction of paper travel.
INITIAL ANALYSIS
1. Inspect the following components. Are they compatible with your printer
version, correctly installed, not damaged, deformed, or contaminated?
• CRU
• PWBA HKB26 MCU
• PWBA HVPS
• Spring Clip
• BTR Assy
• BTR Chute Assy
• Heat Roll
• Pressure Roll Assy
• Fuser Assy
• ROS Assy
2. Inspect the printer paper path. Is it clear of foreign matter such as staples,
paper clips, and paper scrap?
Table continued
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
DRIVE COMPONENTS FAILURE
Use MAIN MOTOR TEST to check the
Gear Assy Drive
.
Are the Drive Assy gears turning the
CRU
gear?
Go to step 3
Go to 6.11
Drive Compo-
nents Failure
3
BTR
Assy
Inspect the
BTR Assy
for contamination.
Is the
BTR
free of contamination?
Go to step 4
Replace the
BTR Assy
4
IMAGE TRANSFER PROCESS FAILURE
Generate a test print and switch OFF printer power halfway
through the print cycle.
Remove the
CRU
and inspect the toner image on the drum.
Was the image on the drum transferred completely to the
paper?
Go to step 5
Go to 6.19
PWBA HVPS
Failure
engine fip5004FA
Summary of Contents for b 6100
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