Canon 40D - EOS 40D DSLR, Service Manual

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Adjustments
6
<Adjustment Procedure>
1) When replacing CMOS Sensor (Using the original mirror box)
（1） Measuring the CMOS Sensor position
Measure the distance from the mount surface to the
following three points.
Ex.) P1: 42.964mm
P2: 42.988mm
P3: 43.015mm
（2） Offset washer determination (Standard distance:
43.10mm)
The difference between the standard distance and the
measured distance （1） for each point is the washer
thickness required at that point. (Do not bond washers
in place.)
P1: 43.10 42.964=0.136
P2: 43.10 42.988=0.112
P3: 43.10 43.015=0.085
（3） CMOS Sensor Ass'y Offset
The CMOS Sensor Ass'y is marked with the offset
values (difference from 43.10mm) for each point.
When installing the CMOS sensor, use the indicated
washers, but do not bond the washers in place.
Ex.) P1: (upper right): 0.021
P2: (lower right): 0.015
P3: (left)
: 0.020
（4） Tighten the three CMOS Sensor Ass'y screws uniformly.
P1
P2
P3
Fig. 003
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Fig. 005
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P1 0.021
P2 0.015
P3 0.020
1
2
3
Fig. 004
Service parts are set to 43.10mm at the factory, and their image units are
adjusted. Each offset data is attached to the parts. Therefore, based on the
43.10mm standard, the offset needs to be added or subtracted to calculate
the final distance. Then, finally select washer that meet calculated distance.
CAUTION