Mechanical Adjustments; Secondary Mirror 40.5 Deg. Angle Adjustment - Canon EOS 7 Service Manual

Part 3: Repair Information

3. MECHANICAL ADJUSTMENTS

3.1 S
ECONDARY
CAUTION
• Carry out when the front panel unit is disassembled, or when the mirror
unit is replaced.
• Angle (45 deg.) adjustment of the main mirror is unnecessary.
<P >
URPOSE
• Vertical adjustment and angle adjustment (40.5 deg.) of the secondary mirror.
(Horizontal adjustment check)
<S >
TANDARD
Vertical 40.5 deg. ± 10'
Horizontal 0 deg. ± 8'
<T >
OOLS
• Mirror angle adjustment tool, secondary mirror gauge (40.5 deg.)
• Auto collimator (f=300mm), alien key wrench 1.3 mm
<P >
REPARATION
1. Adjust the flatness of the table where the auto collimator is set.
Use the flat mirror and position the reflective chart at the center of the auto
collimator's viewing area.
Flat mirror
M 40.5 . A
IRROR DEG
Fig. 3-47 Auto collimator
3-34
A
NGLE DJUSTMENT
Flat mirror reflective chart
Chart image within the viewing area