Canon EOS-1V Service Manual page 67

1.6 S C
HUTTER URTAIN
• Before executing the shutter curtain closing adjustment, be sure to exe-
cute the shutter adjustment.
CAUTION
• If BC error 21 occurs often, the shutter is probably faulty. Replacing the
shutter is recommended. (When the MAX and MIN values differ greatly.)
PURPOSE
Checking and executing the shutter curtain closing adjustment if BC error 21
occurs often.
1) Follow the on-screen instructions as
shown on the right, and release the
shutter 10 times or more. Then press
the Return key.
2) The shutter curtain closing value
when it was adjusted the last time
and the currently measured shutter
curtain closing value are displayed.
Either press the Return key to write
the currently measured value to the
camera or press the space bar to not
write it to the camera.
NOTE:
If the previous correction value and
the current correction value differ
greatly, BC error 21 is less prone to
occur. This is because the shutter's
characteristics are different from the
time of the last adjustment.
C A
LOSING DJUSTMENT
SHU3
Shutter
Adjustment
SHU_MENU
Shutter
Adjustment
(If the difference between MIN and MAX is greater than 150 µs,
4-13
Part 4: Electrical Adjustments
Shutter Adjustment
Shutter curtain operation adjustment
will be carried out.
Release shutter more than 10 times.
After releasing, press RETURN.
The Shutter has been released 12 times.
Reference Data is adjusted as follows:
MIN 230 µs, MAX 270 µs
Difference between MIN and MAX is 40 µs
The previous compensation value is -646.
The current compensation value is 8.
replacing Shutter Unit is recommended.)
Press RETURN key to execute the adjustment.
Press SPACE bar to return to Shutter Menu
without writng the adjusted data.