Canon iR1020 Series, Service Manual

Page: 198 / 304

Chapter 13
13-4
13.4 ADF
13.4.1 Outline
13.4.1.1 Outline
0013-1273
iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F /
iR1024i / iR1024iF
This machine has the following adjustment items. Make the necessary ad-
justments after replacing each part.
T-13-3
13.4.1.2 Preparing a Test Sheet for Adjustment
0013-1274
iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F /
iR1024i / iR1024iF
Preparing a Test Sheet: On a sheet of A4 or LTR paper, draw straight lines
as indicated:
F-13-7
F-13-8
13.4.2 Adjusting the Mechanical System
13.4.2.1 Adjusting the Perpendicularity
0013-1276
iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F /
iR1024i / iR1024iF
1) reate a test chart, load it in the ADF, and make a copy of it.
2) Compare the lines at the end of the test chart with those on the copy for
perpendicularity. Measure dimensions A and B at the end of the copy and
adjust the amount of skew (the range shown in the table) to within the
spec.
T-13-4
F-13-9
3) Loosen the two screws [1] securing the right hinge and slide the hinge ac-
cording to the sale markings so that the perpendicularity is within spec.
F-13-10
4) Tighten the screws you loosened in step 3.
13.4.3 Adjusting the Ellectrical System
13.4.3.1 Adjusting the Magnification
0013-1277
iR1020J / iR1024J / iR1020 / iR1024 / iR1024A / iR1024N / iR1024F /
iR1024i / iR1024iF
1) Create a test chart, load it in the ADF, and make a copy of it. This copy is
called copy A.
2) Compare the longitudinal image length on the test chart with that on copy
A. If required, make an adjustment in the service mode.
(A4-size paper: 277 +/-1mm LTR paper: 59 +/-1mm)
Image on copy A is shorter. -> Increase the value (or reduce the stream read-
ing speed).
Image on copy A is longer. -> Decrease the value (or increase the stream
reading speed).
3) Enter the service mode.
Sequentially press the additional functions key, 2 key, 8 key, and additional
functions key on the operation panel of the host machine.
4) Using the arrow keys on the operation panel, display "#SCAN".
5) Press the OK key.
6) Using the arrow keys on the operation panel, display "#SCAN NUMER-
IC".
7) Press the OK key.
8) Using the arrow keys, select "48".
9) Using the numeric keys, change the value to determine the optimum value.
Next, press the OK key. (Default: 32)
No. Adjustment type Replaced parts
[1] Perpendicularity adjustment Hinge
[2] Magnification adjustment Motor/roller
[3] Side registration adjustment -
[4] Leading edge registration
adjustment -
Dimension
(using A4) Dimension
(using LTR)
A-B 0 +/- 1.5 mm 0 +/- 1.5 mm
10mm
10mm
10mm
10mm
<Using A4 Paper>
Draw straight lines.
(feeding direction)
10mm
210mm
297mm
10mm
10mm
10mm
10mm
<Using LTR Paper>
Draw straight lines.
(feeding direction)
10mm
216mm
279mm
Copy of the test sheet
A
B
(feeding direction)
[1]