2. Model 636 Flash Exposure Adjustment
a. Remove the Front Plate/Lens Panel (see Fig. 3) and replace it with the modified Front
Plate shown in Fig. 5 (NPI 600AM #92-30 has more information).
b. Using a dental pick, narrow-bladed screwdriver or other suitable tool, adjust the IR
calibration wedge (see Fig. 6). Move the IR calibration wedge counterclockwise
(CCW) to decrease the reading or clockwise (CW) to increase the reading (see Fig. 6).
c. Replace the original Front Plate and retest the camera. Readjust the IR calibration
wedge if necessary.
d. If the IR calibration wedge adjustment cannot bring the reading into specification,
disassemble the camera down to the shutter level and examine the photocell area. Be
certain the photocell is properly seated. Reassemble the camera and retest. Readjust
the IR calibration wedge if necessary.
Fig. 5 Replacing Front Plate with modified Front Plate
Fig. 6 Adjusting IR Calibration Wedge
IR calibration
wedge
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