Canon iR8500 Service Manual page 46

5.22.4 Pixel/Line Conversion
PCB .................................. 5-115
5.22.5 Main Controller PCB ....... 5-116
5.22.6 After Replacing the Main
Controller PCB ................ 5-117
5.22.7 Reader Controller PCB .... 5-118
5.22.8 After Replacing the
Reader Controller PCB .... 5-118
5.22.9 Original Orientation
Detection PCB ................. 5-118
5.22.10 AC Driver PCB ................ 5-119
5.22.11 Voltage Converter PCB .... 5-119
5.22.12 High-Voltage Transformer
(AC) PCB ......................... 5-120
5.22.13 All-Day Power Supply
PCB .................................. 5-120
CHAPTER 6 TROUBLESHOOTING
1 Guide to the Troubleshooting
Tables .................................................. 6-1
1.1 Image Adjustment Basic
Procedure ................................... 6-3
1.1.1 Making Pre-Checks ............. 6-3
1.1.2 Making Checks on
the Printer Side (1/2) ........... 6-4
1.1.3 Making Checks on
the Printer Side (2/2) ........... 6-5
1.1.4 Making Checks on
the Scanner Side .................. 6-6
2 Standards and Adjustments ................. 6-9
2.1 Making Image Adjustments ....... 6-9
2.1.1 Adjusting the Image
Position for Printer
(book mode) ...................... 6 1
2.1.3 Adjusting the Image
Position for Copier Output
(ADF mode) ....................... 6-17
2.2 Scanner System ........................ 6-18
2.2.1 Replacing the Scanner
Drive Cable ........................ 6-18
COPYRIGHT© 2001 CANON INC.
5.22.14 Bi-Centronics PCB .......... 5-121
5.23 Power Supply Unit ................. 5-123
5.24 High-Voltage Transformer
(AC) ....................................... 5-124
5.25 High-Voltage Transformer
(DC) ....................................... 5-125
5.25.1 After Replacing
the High-Voltage
Transformer (DC) ............ 5-125
5.26 Relay PCB .............................. 5-125
5.27 Removing the Voltage
Converter Unit ........................ 5-126
5.28 Removing the Hard Disk ....... 5-127
5.28.1 After Replacing the Hard
Disk .................................. 5-128
2.2.2 Adjusting the Position of
the Scanner Mirror Base .... 6-18
2.2.3 When Replacing
the Scanning Lamp
When Replacing
the Standard White Plate ... 6-18
2.3 Image Formation System ......... 6-19
2.3.1 Stringing the Grid Wire of
the Primary Charging
Assembly ........................... 6-19
2.3.2 Stringing the Charging
Wire of Charging
Assemblies ......................... 6-19
2.3.3 Mounting the Drum
Cleaning Blade .................. 6-19
Pickup/Feeding System ........... 6-20
4.1 Orientation of the Deck/
Cassette Pickup Roller ....... 6-20
2.4.2 Orientation of the Deck/
Cassette Separation
Roller ................................. 6-21
2.4.3 Orientation of the Feeding
Roller of the Deck/Cassette
Pickup Assembly ............... 6-21
CANON iR8500 REV.1 MAR. 2001
CONTENTS
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