Adjusting The Mast Magnetic Down Switch - Will Burt Night Scan Powerlite Operating Instructions Manual

NIGHT SCAN POWERLITE, POWERLITE XTREME, AND POWERLITE HDT
OPERATING INSTRUCTIONS
7.5.4

Adjusting the Mast Magnetic Down Switch

The Mast Magnetic Down Switch tells the control system the mast is fully retracted and allows
the mast to tilt back to the stowed position. The Magnetic Down Switch is band-clamped to the
base tube. This switch senses a magnet in the top tube when the mast is at 90°, or stowed, but
not extended. The magnet is located in a recess at the bottom of the top tube and is not visible
from outside the tube. If the Magnetic Down Switch is mis-adjusted, the mast may give an error
code upon power up, or may not stow from 90°. When adjusting the Magnetic Down Switch,
ensure that the mast is at 90° or stowed with all collars stacked and no gap between them.
Before delivery of a new system, all switches are properly set and tested and normally no switch
adjustment is necessary. However, if an adjustment is required, adjust as follows:
1. Deploy the mast to some point between 0° and 90°.
2. Loosen the band-clamp that holds the Magnetic Down Switch and lower the clamp to the
bottom of the mast.
3. Remove the left base cover to expose the base PC Board diagnostic LEDs (see Figure 7-1).
4. Ensure the mast is fully nested (no gaps between collars). While observing the Base Board
diagnostic "Mast Down" LED, slowly move the band-clamp up until the "Mast Down" LED
turns green.
5. To test:
a. Initiate the mast.
b. Press the "Mast Down" button on the controller until the mast stows. If the mast does not
stow, repeat steps one and two several more times or until the mast stows.
6. If repeated adjustments do not succeed, use a small piece of steel or iron filings to locate the
magnet in the tube and move the Banded Magnetic Switch to the magnet's location.
7. If the mast still will not stow, hold a separate magnet up to the Banded Magnetic Switch.
Press the "Mast Down" button and ensure that the mast begins to stow. Be careful not to
pinch hands during mast movement.
8. If the mast stows while using the separate magnet, repeat the switch adjustment steps above
until the switch senses the magnet.
9. If the mast does not stow using a separate magnet, check the wiring to the Base Board for
loose or disconnected wires. See the wiring diagrams for the system. If the wiring is intact,
replace the magnetic switch.
PAGE 62 OF 98 TP-4723701-U
MAY 2021