Canon EOS 20D Service Manual page 138

2) Keep the shutter ass'y in charge state. Then put the shutter charge lever
into the groove of the mirror lever and screw the shutter ass'y in place.
Charge state
Fig. 100
3) Sensor flex attachment
(1) Applying the insulating tape
Apply the insulating tape to protect the flex from touching the front panel
ass'y. (Without this, shutter system errors will occur.)
Back side
Fig. 102
(2) Apply double-sided tape
Apply double-sided tape to fix the
sensor flex in place.
Fig. 104
(4) Sensor flex attachment
Be sure to fix the sensor flex in place with double-sided tape.
Attachment position
Fig. 106
Put the lever into the groove.
Put the flex into the
space between the shaft
Loosen the flex
and the pentaprism.
Fig. 107
31
Fig. 101
Back side
Fig. 103
(3) Soldering of the mirror-up detection
switch
Defective soldering can cause
shutter system errors, so be sure to
solder securely.
Fig. 105
Attachment position
Fig. 108
Repair Information
Fig. 109