Mechanical Adjustment - Canon EOS 55 Service Manual

Part 3: Repair Information
3. MECHANICAL ADJUSTMENTS
3.1
Sue-MIRROR
42°
ANGLE ADJUSTMENT
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: Cf4 111 MH·
The sub-mirror angle must be adjusted when the front panel unit or mirror :
: unit is disassembled or replaced. The main mirror angle is not adjustable. :
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PuRPosE:
To adjust the sub-mirror vertically to obtain the mirror angle (42°). (Horizontal align-
ment is checked only.)
STANDARD:
Vertical
Horizontal
TOOLS:
42°
±
5'
0°
± 8'
Universal goo Collimator-3; Hex key (0.05" or about 1.2mm); Sub-mirror gage (42°)
PREPARATION:
Attach the sub-mirror gage (42°) to the universal go° Collimator-3 to calibrate the
sub-mirror magnifier. (Refer to the Universal go° Collimator Operating Instructions
for details on calibration.)
Horizontal Scale
Sub-mirror Scope
imit Area
Vertical Scale
Fig. 3-35 Universal 90° Collimator
Al>JuSTMENT:
1. Unhook the mirror up spring and
put the mirror down.
2. Attach the front panel unit to be
tested with the mirror unit and no
AF sensor unit to the universal go
0
Collimator-3.
3. Use the hex key to turn the eccen-
tric dowel in the mirror box, as
shown in the below illustration to
adjust the vertical angle ..
tandard Gage and
Front Panel Mount
Main Mirror Scope
Mirror Spring
Fig. 3-36 Sub-mirror Adjustment
3-28