Shutter Speed Adjustment - Canon A-1 Repair Manual

2nd Cilrtain
Latch Lever,_ ...... ",
2nd Curtain
Latch Cam
Fig. 2-4
3. With the shutter would L2 =· 0.0 - (-0.15)
mm
(under charge)
Adjustment: Setscrews (X3l-6222-590) x 2
Notes: 1. Remember that this adjustment is
different from the AE-l.
This mechanism differe from the AE-l
in that the latch cam and latch lever
are in hard contact (pushing against
each other) in the A-l.
In the AE-l there is a slight clearance
between them in the shutter wound
position.
2. If this adjustment is not correct the
middle shutter speeds will not be
correct.
2.3 Shutter Speed Adjustment
1. The shutter speeds of this camera are all automatically
controlled by the computer, using the clock pulse as
the standard. The shutter speed adjustment is made
by adjusting the count start (CTST) signal timing.
(Section 3.3.2.)
2. Set the camera in the
TV
mode and the shutter speed
to 1/1000. Check the shutter accuracy.
3. Adjust VRT for the most accurate shutter speed.
(Fig. 2-5)
VRT
VRL
VRG
r<®(ID(®l
Fig. 2-5
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