Canon A-1 Repair Manual page 141

5V
!
00) 5
.. .. ... .
..
..
.... .. ..
.
...
Fig. 3-42
(Trigger: MG3)
(The form with the reverse
current spike is the
actual release . This spike
occures when the yoke and
armature actually release.)
3. SMG3 (3P)
tv
SMG3 is the MG3 operation signal from the CPU Ie. The
following three waveforms (Fig. 3-43, 44, 45) illustrate
the signal.
f-1"--tFlg
3-4~1----j
l
nL-:.....-..-..JIr-------
SMG3
C:
1o
3-43Y
10
3-44
Fig . 3-43
(Trigger: SMGl negative
going)
This shows the 5
to release MG2 .
12 mS after SMGl
go low together .
mS gate used
It
occures
and SMG3
75