Lens Issues - PRG BAD Boy Field Service Manual

Lens Issues

Lenses fail to calibrate or lenses not operating correctly, and Zoom Sensors are good
Details: There are four (4) Zoom Sensors, one for each Lens Group 1, 2, 3, and 4. Group 4 is farthest from the
lamp. Each sensor contains an LED which is helpful in determining failures. After calibration, the status of each
Lens Group will be displayed on the Status screen by the color of its name abbreviation or "sub-code." These
are:
• Lens Group 1 - LN1
• Lens Group 2 - LN2
• Lens Group 3 - LN3
• Lens Group 4 - LN4
WARNING: Before starting this test, it is highly recommended you remove all tools and body parts from the
lens travel areas. The moving lens groups will pinch fingers between several contact points in the assembly
and can cause extreme discomfort. The motors are fused to stop, but injury can occur.
Procedure: Before the Zoom calibration starts, all four of the LED's on the sensors should be red. If any are not
red, stop here and change that sensor
cess. Once calibration starts, each lens starting with Group 1 will travel toward its sensor one by one. There is
a spring-loaded gold plated pin at the end of a screw that will come into contact with each lens group's sensor.
The gold sensor pin has been precisely set for optimum performance of that lens group. (Do not adjust any of
the gold pins on any lens group for any reason. They are factory set.) When the spring loaded gold tip of the
screw touches the gold pad on the Zoom Sensor, the LED will turn green and the lens group will stop moving.
Immediately, Group 2 will duplicate the movement towards its sensor. If each lens group 1 through 4 sequen-
tially locates its sensor and the red LED's each turn green, then the Zoom Assembly is functioning properly. If
any of the four sensors does not change from red to green, the calibration process will stop, ensuring the lens
groups do not collide. In addition, all four lens sub-codes in the Status screen will turn red, indicating a failure to
calibrate. The most common sensor failures will be defined by an incorrect LED color when the gold pin
touches the gold pad on the sensor. These would be a failure to turn green from red, turning from red to yellow
(both green and red) or the red LED turns off after contact with the gold pin during the calibration procedure.
Solution: Ensure all Zoom Lens Sensor cables are properly seated.
Solution: Replace Zoom Controller 2A Fuse...
Solution: Replace Zoom Controller PCB...
Lenses fail to calibrate or lenses not operating correctly, and Zoom Controller PCB is good
Details: There are four (4) Zoom Sensors, one for each Lens Group 1, 2, 3, and 4. Group 4 is farthest from the
lamp. During Zoom calibration, a gold, spring-loaded screw will move with each lens group towards its EOT
sensor. When the pin touches the gold pad on the Zoom Sensor, the red LED on the sensor should turn green
and the lens group will stop moving. This repeats for the other three lens groups. The Zoom Controller PCB
has four (4) motor drivers. There is a 2 Amp Timed (Slo-Blow) Fuse to protect each of the four drivers. They
provide power for both the motors.
Procedure: Check for blown fuses. Replace any blown fuses and recalibrate the fixture. If the LED on the
Zoom Sensor stays red, turns off, or changes to yellow, both red and green on, it has failed and needs to be
replaced.
Solution: Replace Zoom Controller 2A Fuse...
Solution: Replace Zoom Sensor PCB...
0 2. 9 8 1 2. 0 0 05
T & T
ESTING ROUBLESHOOTING
(page 57). When you get all four LED's on red, start the calibration pro-
page 65
page 55
page 65
page 57
: T
ROUBLESHOOTING
2
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