Repair manual

Shutter Timing and Flash Synchronization
( For strobe see section 24.200 )
24.000 SHUTTER TIMING AND FLASH SYCHRONIZATION
The personal camera is designed and built so that, if properly
times at 1/100 of a second, all the other speeds will be in correct
time. All cameras leaving the factory are timed to within ±10% and
checked on all marked speeds except 1/15.
We recommend that the flash switch be adjusted by the use of an
oscilloscope with a shutter timer. See wiring diagram). The use of
an oscilloscope has many advantages over just a shutter timer, since
it not only will synchronize the flash for you but will tell you if
the switch points are bouncing, or if the points are not making good
contact. An oscilloscope will also tell you if there is any
malfunctioning of the shutter blades (Section 24.100 – Q). For these
reasons, we strongly advise the use of an oscilloscope with your
shutter timer for timing shutter and flash synchronization.
If an oscilloscope is not available for use in testing the
camera, your present timer may be adapted to timing the “Personal
Camera”. For instruction on adjusting timing see sections A, D, E,
F, G, I, & R; For instruction on adjusting the flash synchronization
see sections J to Q. Switch should be adjusted very carefully as too
much tension on the drive blade (See diagram, Section 24.200) will
cause improper contact or “Switch bounce.”
24.100 Adjustment of Shutter and Flash Synchronization.
A - Camera assembly complete, Less back and bottom plate.
B - Turn on shutter timer and oscilloscope. Set oscilloscope as
follows:
”Sync. Selector” at “Int.”, “Sync. Amplitude” at +30”, “Sweep
Vernier” at “80”, “Sweep Range” at “10”, “Y Axis Volts Full
Scale” at “100 DC”, “Y Axis Multiplier” between “1.0 and “1.5,
“X Selector” at “Sweep Driven”, “X Amplitude” at “32, “Focus”
as required for sharp trace, “X Position” and “Y Position” as
required to position trace, and “Intensity” as required.
C - Place camera in tester with lens opening at “3.5” shutter
speed on “Bulb”, and shift knob on “A”.
D - Close shutter; set shutter speed to “1/100 (Always move
shutter speed knob clockwise to selected position).
E - Wind camera knob, and release shutter.
F - Read the shutter speed on the timer scale. Repeat for three
readings.
G - Remove camera and adjust speed by bending very slightly the
hook end of the floating lever. (See photo of movement)
Bending this hook toward the secondary latch will increase the
exposure; Bending it away from the secondary latch decreases
the exposure. Therefore, if the shutter reads .005 or
nothing, bend the hook toward the latch, but if the shutter
reads .015 or .020, bend the hook away from the latch.
Several tries may be required to adjust the shutter between
.009 and .011