Canon iR1600 Series, Service Manual

Page: 20 / 738

COPYRIGHT © 2002 CANON INC. 2001 2001 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
xviii
CONTENTS
2.1.5 Adjusting the Image Position
for ADF Copying ............... 13-9
2.2 Fixing System ........................ 13-11
2.2.1 Checking the Fixing
Roller Pressure (nip) ....... 13-11
2.3 Electrical Parts ...................... 13-12
2.3.1 When Replacing the
Major Parts ...................... 13-12
2.3.2 Gain Auto Adjustment .... 13-12
2.3.3 When Replacing the
Contact Sensor ................ 13-12
2.3.4 When Replacing the
Image Processor PCB ..... 13-13
2.3.5 When Replacing the
DC Controller PCB ......... 13-15
2.3.6 When Replacing the
Analog Processor PCB .... 13-15
2.4 Checking the Sensors ............ 13-16
2.4.1 Checking the Sensors ...... 13-16
3 Troubleshooting Image/
Operation Faults ............................. 13-19
3.1
Making Initial Checks on
Image Faults .......................... 13-19
3.1.1 Site of Installation ........... 13-19
3.1.2 Checking the Originals ... 13-19
3.1.3 Copyboard Cover and
Copyboard Glass
(standard white plate) ..... 13-19
3.1.4 Checking the Transfer
Charging Roller/
Static Eliminator ............. 13-20
3.1.5 Checking the Drum Unit .. 13-20
3.1.6 Checking the Paper ......... 13-20
3.1.7 Image Adjustment Basic
Procedure ......................... 13-20
3.1.8 Others .............................. 13-20
3.2 Image Fault Samples ............. 13-22
3.3 Troubleshooting Image
Faults ..................................... 13-23
3.3.1 The copy is too light.
(halftone only) ................. 13-23
3.3.2 The copy is too light. (both half-
tone and solid black) ........ 13-23
3.3.3 The copy is too light. (entire
copy, appreciably) ........... 13-23
3.3.4 The copy has uneven density.
(darker along front) ......... 13-26
3.3.5 The copy has uneven density.
(lighter along front) ........ 13-26
3.3.6 The copy is foggy.
(entire copy) .................... 13-27
3.3.7 The copy is foggy.
(feeding direction) .......... 13-28
3.3.8 The copy has black lines.
(feeding direction, fuzzy,
thick) ............................... 13-28
3.3.9 The copy has black lines. (feed-
ing direction, fine) ............ 13-28
3.3.10 The copy has white strips.
(feeding direction) ............ 13-29
3.3.11 The copy has white lines.
(feeding direction) ............ 13-29
3.3.12 The output has white strips.
(cross-feeding direction) . 13-30
3.3.13 The back of the copy is
soiled ............................... 13-31
3.3.14 The copy has a poor
fixing ................................ 13-32
3.3.15 The copy has displaced registra-
tion. (leading edge extremely
excessive margin) ............. 13-33
3.3.16 The copy has displaced registra-
tion. (leading edge, excessive
margin) ............................. 13-33
3.3.17 The copy has displaced regis-
tration. (leading edge, no
margin) ............................. 13-33
3.3.18 The copy has blurred
images .............................. 13-34
3.3.19 The copy is foggy.
(cross-feeding direction) . 13-35
3.3.20 The copy has poor
sharpness. ........................ 13-36
3.3.21 The copy is blank. ............ 13-37
3.3.22 The copy is solid black. .... 13-38
3.3.23 The copy has a black line
(stream reading). ............. 13-39
3.4 Troubleshooting
Malfunctions .......................... 13-40
3.4.1 AC power is absent. ......... 13-40