Repair manual

After adjusting the floating lever hook, replace camera in
tester and wind camera. Trip shutter. Read timer scale.
H - When tripping the shutter during this 1/100 test, ovserve the
oscilloscope and note that the trace is thus:
I - Set shutter speed to 1/50 and check speed and oscilloscope
trace. Speed should be .018 to .002.
(See Section 24.100 – Q for details of analyzing this trace)
J - Attach camera flash connection to top of camera. Watch
oscilloscope during 1/50 exposure now. It should look thus if
the switch is operating perfectly:
In order to understand better the picture on the screen in
terms of the adjustment and operation of the switch, let us
examine the picture in terms of the mechanical movements of
switch and shutter.
First however, let us review briefly the operation of the
oscilloscope in making the picture. The oscilloscope trace,
or picture, Is formed by a bright spot moving from left to
right across a light-retentive screen. When the oscilloscope
is adjusted, the spot moves the length of the line in very
nearly 0.1 second when triggered. Therefore, the horizontal
position of the spot is a function of time:
(1) By the amount of light reaching the photocell.
(2) By the flash gun current through the shutter switch
contact.
The results of (1) are clearly demonstrated by the