Adjusting The Rcp Home Position - Will Burt Night Scan Chief Series Operating Instructions Manual

NIGHT SCAN CHIEF
OPERATING INSTRUCTIONS
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.
7.6

Adjusting the RCP Home Position

The RCP home position is the position of the RCP and lights where the light bars are parallel to
the axis of the mast and the lights are facing down when stowed. If the RCP home position is set
properly, when being stowed the RCP shafts should contact the saddle simultaneously. The
home position is established by positioning small flags in the RCP that engage photo interrupters
on the RCP PC board. Adjusting the RCP home position should be done indoors. Adjusting the
home position outside can cause improper RCP operation due to sunlight reaching the photo
sensors. Before delivery of a new system, the RCP home position is adjusted and tested and
normally no adjustment is necessary.
If an adjustment is required, adjust the RCP home position as follows:
1. Disconnect all light power to the system using proper lock-out tag-out procedures (see Sec-
tion 7.1). Keep the DC power connected to the mast control system.
2. Initiate the mast and raise the mast to the 90° position. Ensure that the "Pan Right" and "Tilt
Down" controller LEDs turn on.
3. Remove the RCP cover to access the flags. The flags are attached to the timing rings on the
horizontal and vertical shaft gears (Figure 7-3). The tilt timing ring has two set screws that
must be loosened. The pan timing ring has two cap screws that must be loosened. It may be
necessary to loosen one in each, then pan and tilt the unit to access the others. Note: The
flags have sharp edges which may cause cuts.
PAGE 48 OF 80 TP-4602001-T
DECEMBER 2020