
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TROUBLESHOOTING
P-3 All black
Print Sample
Symptom
Completely black paper
(No image is transferred and the paper is completely black.)
Initial Check
Are any parts dirty, broken, malformed, incorrectly installed or different
from those listed in the specifications?
• Principle Parts to be Checked:
(1) EP toner cartridge, (2) HVPS, (3) Drive assembly, (4) ROS assembly
(5) MCU PWB, (6) Harness assembly HVPS
Step
Check
Remedy (if not normal)
1
(The HVPS CR/TR/DB is defective.)
Does the problem occur while printing with the
window (the exit window for the laser beam) in the
ROS assembly covered by the paper?
2
(The ROS assembly is defective.)
Does the problem occur while printing with only half
of the window (the exit window for the laser beam) in
the ROS assembly covered by the paper (the sides of
the window are not covered by the paper)?
3
(The EP toner cartridge is defective.)
Does the problem recur if the EP toner cartridge is
replaced with a new one?
See section 3.14 Faulty HVPS CR/TR/
DB.
See section 3.4 Faulty ROS Assembly.
Replace the EP toner cartridge.
Summary of Contents for WinType 4000
Page 1: ...WinType 4000 TECHNICAL MANUAL SECOND EDITION LASER PRINTER ...
Page 4: ......
Page 6: ... 2 GENERAL SPECIFICATIONS ...
Page 14: ... 10 THEORY OF OPERATION ...
Page 26: ... 22 THEORY OF OPERATION Figure 2 9 Electrical ...
Page 28: ... 24 REPLACEMENT AND ADJUSTMENT OF PARTS ...
Page 62: ... 58 REPLACEMENT AND ADJUSTMENT OF PARTS ...
Page 64: ... 60 MAINTENANCE GUIDE ...
Page 114: ... 110 MAINTENANCE GUIDE ...
Page 116: ... 112 TROUBLESHOOTING ...
Page 176: ... 172 5 ELECTRICAL 5 1 Disassembly Drawing 1 2 3 4 14 4 14 2 14 1 14 3 13 12 11 6 5 7 8 9 10 ...
Page 179: ......