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Chapter Objectives
General Troubleshooting Aids
Symptom
POWER indicator does
not light.
Winchester disk or
micro-floppy disk
indicators does not light.
Micro-floppy will not eject
after pressing the eject
pushbutton.
Fan does not operate
Troubleshooting Your System
In this chapter you will find:
general troubleshooting aids for each mass storage system.
troubleshooting aids specific to the 1770–M11 system
troubleshooting aids for the disk controller module located inside the mass
storage systems
Probable Cause
Burned out LED
Power cable not properly connected.
Failure with the power supply.
Burned out LED
Failure with an internal component (Winchester
disk, power supply, or SCSI).
Mechanical failure
Power supply failure.
Mechanical failure with the fan
ATTENTION: : Always operate the mass storage system(s) with
the metal cover on. Operating a mass storage system with the cover
off could cause loss of data due to inadequate shielding.
5
Chapter
Recommended Action
Call your Allen-Bradley sales engineer or
distributor.
Connect power cable.
Test for a 12V reading with a voltmeter.
Call your Allen-Bradley sales engineer or
distributor.
Call your Allen-Bradley sales engineer or
distributor.
Call your Allen-Bradley sales engineer or
distributor.
Test for a 12V reading with a voltmeter.
5 1
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