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Blade Speed Adjustment (Opening Blade Spring)
1. Remove the Top Cover from the ProCam.
Note: Reference the Disassembly and Assembly procedures in Section 3 of
this Service Manual to remove the Top Cover.
Caution: High Voltage Exposure! Voltages up to 320 volts are present
on the top flash tube terminal (Green wire) and at various
other locations on the Strobe Board.
2. Using tweezers, carefully lift the upper end of the Opening Blade spring out of
its notch in the Shutter Base Block (Figure 2-7).
Caution: Do not overstretch the Spring.
3. If the Blade Speed is too slow, reposition the Opening Blade Spring one notch
to the right. If the Blade Speed is to fast, reposition the Opening Blade Spring
one notch to the left.
4. Put the Top Cover on the ProCam and then retest Blade Speed.
Note: If necessary, readjust the spring tension.
5. When the Blade Speed is within specification, replace the Top Cover.
Note: • If changing the Opening Blade Spring position will not bring the
Blade Speed within specification, replace the Opening Blade Spring
and then retest.
• If the Opening Blade Spring is still out-of-Specification,
disassemble the ProCam to the Shutter level. Examine the Blade-
Opening parts (Walking Beam/Inertia Assembly, Drive Link, etc.)
and the Shutter Blades for dirt, binding parts and damage. Correct
any problems found, re-assemble the ProCam and then retest Blade
Speed. If necessary, re-adjust the Opening Blade Spring.
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