Hybrid (Zls/Blade Speed) Test - Polaroid ProCam Repair Manual

Hybrid (ZLS/Blade Speed) Test

The Hybrid (ZLS/Blade Speed) Test measures the resultant on the film plane from
full strobe output through partially open blades, to determine whether the blades
open at the proper speed and the strobe fires at the proper time. If the results of
this test are satisfactory, it means that the maximum strobe output, blade speed and
ranging are all functioning properly.
Setup
1. Using the Door Switch Activator tool, trip the door switch on the ProCam.
2. Place the ProCam on the Test Horn on top of the tester, with the lens 4.5
feet from the graywall.
Note: • Front of the ProCam must be parallel to the graywall.
• Area visible in the viewfinder must be clear of objects.
3. Slide all switches on the ProCam into the down (on) position.
4. Cover the Photocell on the ProCam.
5. Set the TEST selector to 7000 ZLS.
Test Procedure
1. Press the shutter button fully and record the ZLS meter reading.
2. Repeat the process two more times, recording all readings. Compare the
readings to the specification.
Note: If the readings are not within specification, perform the Hybrid
Adjustment and then retest Ambient.
3. If the Hybrid Adjustment does not bring the Hybrid Test reading within
specification, perform the Blade Speed Test.
4. If Hybrid Test reading is within specification but the Strobe Exposure
(Graywall) reading is still out-of-specification, replace the ExposureBoard
and then retest.
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