Service Manual
DS 350 GM
Rev A 05/01/01 // SB
190113_A
18
Fault in wiring between boom nose box and cable reel. Check
for damaged length cable and wiring.
Refer to Drawing 3 Section 4.
If broken length cable, Refer to Section 3.4.
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Ensure 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 Drawing 2 & 6 Section 4.
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 Drawing 3 Section 4.
Replace slip ring
Refer to Drawing 3 & 6 in Section 4.
Correct?
No
Measure the A2B signal in the boom base box between terminals 5 and 6
with an ohmmeter.
Switch closed =4700 ±500Ohms
Switch open => 1 Megaohm
Reconnected slip ring wires.
Refer to Drawing 3 Section 4.
No
Fault in 7 conductor cable between cable reel and
boom base box. Check connections and replace
cable if necessary.
Refer to Drawing 3 in Section 4.
Correct?
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