Caliber SCFGPA, Manual, Page: 6 / 34

2.2 Bus Short Error, continued
Step 5
Troubleshooting inside the Carrier
1. Switch the power off to the drive unit.
2.
Make sure the target is fully exposed or edged, if not, move it manually
3. Remove left side of the Target Carrier.
Check for damage to the
power pick-ups. Check
for a trapped case that
may be shorting the
carrier to the Bus. You
may need to stick your
hand inside and feel for a
loose case.
4. Remove right side of the Target Carrier.
Make sure the aircraft
cable is not damaged and
the “tail” wrapped around
the ratchet is clear of the
Bus Bar screws.
5. If the short was found, remove the electrical tape and turn power back on the Drive unit.
Test the carrier for movement and its lights. If the short still exists, call House and Grounds.
Important notice about the copper Bus Bar mounting screws:
Only tighten the bus bar screws by hand using an Allen key and do not use impact or
torque drill as these can strip the thread in the copper. Tighten the screws until the flange
of the nylon shoulder washer just begins to compress under the head of the screw.
Remove only these 2 screws
Use 5/32 Allen drive
Tensioning spring is behind the black Target Carrier cover.
Remove only these 2 screws
Use 5/32 Allen drive