Chapter 4 Troubleshooting Image Faults - Canon iR5000 Service Manual

8.5 Conversion Table for the
Potential Control System ........ 3-37T
8.6 Emergency Measures for a
Fault in the Potential Sensor ... 3-41T
9. Checking the Environment
Sensor ........................................... 3-42T
9.1 Procedure ............................... 3-42T

CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/

1. Making Initial Checks in the
Event of an Image Fault .................. 4-1T
1.1 Site Environment ...................... 4-1T
1.2 Checking the Originals for
Symptoms ................................ 4-1T
1.3 Copyboard Cover, Copyboard
Glass, and Standard White
Plate .......................................... 4-1T
1.4 Checking the Charging
Assemblies ............................... 4-1T
1.5 Checking the Developing
Assembly ................................. 4-2T
1.6 Checking the Paper ................... 4-2T
1.7 Checking the Periodically
Replaced Parts .......................... 4-2T
1.8 Image Adjustment Basic
Procedure ................................. 4-2T
1.9 Others ....................................... 4-2T
2. Samples of Image Faults ................. 4-4T
3. Troubleshooting Image Faults ........ 4-5T
3.1 The image is too light
(halftone) .................................. 4-5T
3.2 The print is too light
(including solid black area) ....... 4-6T
3.3 The print is too light
(overall, appreciably) ................ 4-6T
3.4 The print has uneven density
(darker at front) ........................ 4-7T
3.5 The print has uneven density
(lighter at front) ........................ 4-7T
3.6 The print is foggy (overall) ....... 4-8T
COPYRIGHT © 2000 CANON INC.
MALFUNCTIONS
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
9.2 Emergency Measure for a Fault
in the Environment Sensor ..... 3-42T
10. Checking the Photointerrupters ..... 3-43T
10.1 Using a Meter ......................... 3-43T
10.2 Using Service Mode ............... 3-43T
10.3 Check List .............................. 3-43T
3.7 The print if foggy vertically ...... 4-9T
3.8 The print has black lines
(vertical, blurred, thick) ............ 4-9T
3.9 The print has black lines
(vertical, fine) ......................... 4-10T
3.10 The print has white spots
(vertical) ................................. 4-11T
3.11 The print has white lines
(vertical) ................................. 4-11T
3.12 The print has white spots
(horizontal) ............................. 4-12T
3.13 The back of the print is
soiled ...................................... 4-13T
3.14 The print has fixing faults ....... 4-14T
3.15 The print has a displaced
leading edge (appreciably
large margin) .......................... 4-15T
3.16 The print has a displaced
leading edge (large margin) .... 4-15T
3.17 The print has a displaced
leading edge (no margin) ........ 4-15T
3.18 The print has a blurred
image ...................................... 4-16T
3.19 The print is foggy
(horizontally) .......................... 4-17T
3.20 The print has poor
sharpness ................................ 4-17T
3.21 The print is blank .................... 4-18T
3.22 The print is solid black ........... 4-19T
4. Troubleshooting Malfunctions ...... 4-20T
CONTENTS
T 3