Canon iR105 Service Manual page 17

2.7.6 When Replacing the HDD
Unit .................................... 6-42
2.7.7 When Replacing the DC
Controller PCB .................. 6-42
2.7.8 When Replacing
the HV-DC PCB ................ 6-42
2.7.9 When Replacing the Laser
Unit .................................... 6-42
2.7.10 When Replacing
the Potential Sensor/
Potential Control PCB ....... 6-43
2.7.11 Checking the Surface
Potential Control System ... 6-47
2.8 Potential Control System
Conversion Table ..................... 6-53
2.9 Checking the Environment
Sensor ....................................... 6-57
2.10 Checking
the Photointerrupters ................ 6-58
2.11 Checking the Optical
Sensors ..................................... 6-64
3 Troubleshooting Image Faults .......... 6-65
3.1 Making Initial Checks .............. 6-65
3.1.1 Checking the Side of
Installation ......................... 6-65
3.1.2 Checking the Originals ...... 6-65
6-65
3.1.3 Checking the Copyboard
Cover, Copyboard Glass,
and Standard White
Plate ................................... 6-66
3.1.4 Checking the Charging
Assemblies ......................... 6-66
3.1.5 Checking the Developing
Assembly ........................... 6-66
3.1.6 Checking the Paper ............ 6-66
3.1.7 Checking the Periodically
Replaced Parts ................... 6-66
3.1.8 Others ................................ 6-67
3.2 Sample Faulty Images .............. 6-70
3.3 Troubleshooting Image
Faults ........................................ 6-71
3.3.1 The output is too light
(halftone area) .................... 6-71
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001
3.3.2 The output is too light
(solid black area) ............... 6-72
3.3.3 The output is too light
(overall, considerably) ....... 6-72
3.3.4 The output has uneven
density
(darker at the front) ............ 6-74
3.3.5 The output has uneven
density
(lighter at the front) ........... 6-74
3.3.6 The output is foggy
(overall) .............................. 6-75
3.3.7 The output has vertical
fogging ............................... 6-76
3.3.8 The output has black lines
(vertical, fuzzy, thick) ........ 6-76
3.3.9 The output has black lines
(vertical, fine) .................... 6-77
3.3.10 The output has white spots
(vertical) ............................. 6-78
3.3.11 The output has white lines
(vertical) ............................. 6-78
3.3.12 The output has white spots
(horizontal) ........................ 6-80
3.3.13 The back of the output is
soiled .................................. 6-81
3.3.14 The output has a fixing
fault .................................... 6-81
3.3.15 The output has a displaced
leading edge (considerably
large margin) ...................... 6-82
3.3.16 The output has a displaced
leading edge
(large margin) .................... 6-82
3.3.17 The output has a displaced
leading edge
(no margin) ........................ 6-82
3.3.18 The output is blurred ......... 6-83
3.3.19 The output has horizontal
fogging ............................... 6-84
3.3.20 The output has poor
sharpness ............................ 6-84
3.3.21 The output is solid blank ... 6-85
3.3.22 The output is solid black ... 6-86
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