DS 350 G Boom Control Troubleshooting- TMS/TTS870 / RT865 BXL
031-300-190-039 Rev. B 4/30/99
53
15. Continuation
Have you found
any wiring failures?
Correct the wiring problem. Refer to
section 11.
Yes
Continuation
Is
the voltage
decreasing from
-500mV to
-4.5V ?
Main board component defective.
Contact authorized service dealer for
main board replacement procedure.
Yes
No
Check the wiring between length
transducer LWG 221 and central unit.
Inspect cable connectors and junction
boxes .
Connect the voltmeter to terminal 2
(signal) and terminal 1 (GND) in the
cable reel. Carefully turn the length
potentiometer clockwise. Use a small
screwdriver to avoid damage.
O turns = - 500mV, 10 turns= - 4.5V.
No
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