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W450769A 01/14
3.4.2 Displayed Load or Radius Errors ................................................................................. 52
3.5 Computer Unit Overview ...................................................................................................... 54
3.5.1 Computer Unit Layout ................................................................................................. 54
3.5.2 Internal Status Indicators ............................................................................................. 54
3.5.3 Function Kickout Fuse ................................................................................................. 55
3.5.4 Pressure Sensors ........................................................................................................ 55
3.5.5 Replacing the Computer Unit ...................................................................................... 56
3.6 Display Console Overview ................................................................................................... 56
3.6.1 Checking the Display Console ..................................................................................... 56
3.6.2 Unresponsive Buttons ................................................................................................. 56
3.6.3 Connectors .................................................................................................................. 57
3.6.4 Horn ............................................................................................................................ 57
3.6.5 Moisture ...................................................................................................................... 57
3.6.6 Replacing the Display Console .................................................................................... 57
3.7 Reeling Drum Overview ....................................................................................................... 58
3.7.1 Checking the Reeling Drum Cable Layering ................................................................ 59
3.7.2 Checking the Extension Sensor Drive Voltage ............................................................ 60
3.7.3 Checking the Boom Extension Sensor Voltage ........................................................... 60
3.7.4 Physical Zero .............................................................................................................. 61
3.7.5 Checking the Angle Sensor Pendulum ........................................................................ 62
3.7.6 Checking the Angle Sensor Drive Voltage ................................................................... 63
3.7.7 Checking the Angle Sensor Voltage ............................................................................ 63
3.7.8 Reeling Drum Replaceable Parts ................................................................................ 63
3.7.9 Reeling Drum Cable .................................................................................................... 64
3.7.10 Slip-Ring Assembly ................................................................................................... 66
3.7.11 Sensor Baseplate Assembly ...................................................................................... 68
3.7.12 Signal Cable Assembly ............................................................................................. 69
3.8 Anti-Two-Block Function Overview ...................................................................................... 71
3.8.1 Checking the Reeling Drum Cable .............................................................................. 72
3.8.2 Checking the Anti-Two-Block Circuit ........................................................................... 72
3.9 Swing Sensor Overview ....................................................................................................... 73
3.9.1 Checking the Swing Sensor Drive Voltage .................................................................. 74
3.9.2 Checking the Swing Sensor Output Voltage ................................................................ 74
3.9.3 Checking the Swing Sensor Resistance ...................................................................... 74
3.9.4 Swing Sensor Setup and Checks ................................................................................ 74
