HAKUBA 26PPM Laser Printer - Base Engine Technical Manual
5-9
Version 1.0
Primary FIPs:Image Quality Problems
5.3 Black Prints
PROBLEM
The entire print is black.
INITIAL ANALYSIS
1. Inspect the following components. Are they compatible with your printer
version, correctly installed, not damaged, deformed, or contaminated?
• CRU
• PWBA HVPS
• Spring Clip
• ROS Assy
• PWBA HKB26 MCU
• Harness Assy HVPS (J26-J261)
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
HVPS CR
Use a sheet of paper to cover the laser beam window.
Generate a test print.
Is the problem still present?
Go to step 2
Go to 6.19
PWBA HVPS
Failure
2
ROS ASSY
FAILURE
Use a sheet of paper to cover HALF of the laser beam window.
Generate a test print.
Is the problem still present only on the uncovered half?
Go to step 3
Go to 6.3
ROS Assy
Failure
3
CRU
FAILURE
Install a new
CRU
.
Is the problem solved?
Problem
solved
Return to Ini-
tial Analysis
Summary of Contents for b 6100
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