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24 160 19_0106E_Rev D.doc / 2005-06-27 / rk.
Fault in wiring between boom nose box and cable reel. Check
for damaged length cable and wiring. Refer to system wiring
diagram. If broken length cable, Refer to length cable
replacement procedure.
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Ensure the A2B switch is closed (weight or flag installed) and, if necessary, the byass plug is
plugged into the boom nose box. Measure the A2B signal in the cable reel
between X1:Brown and X2:Red wires on the slip ring with an ohmmeter.
Switch closed =4700 ±500Ohms
Switch open => 1 Megaohm
Reconnected slip ring wires.
Refer to system wiring diagram.
Correct?
No
Measure the A2B signal in the cable reel between terminal 7 and 8 with an ohmmeter.
Switch closed =4700 ±500Ohms
Switch open => 1 Megaohm
Reconnected slip ring wires.
Refer to system wiring diagram.
Replace slip ring
Refer to system wiring and cable reel diagram.
Correct?
No
Disconnect boom base connector, measure the A2B signal in the boom base connector on
cable reel cable assembly between terminals 5 and 6 with an ohmmeter.
Switch closed =4700 ±500Ohms
Switch open => 1 Megaohm
Reconnected slip ring wires.
Refer to system wiring diagram.
No
Fault in 7 conductor cable between cable reel and
boom base connector. Check connections and
replace cable if necessary.
Refer to system wiring diagram.
Correct?
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