TM11-7025-229-12
4-9.
TROUBLESHOOTING
a.
The first step in troubleshooting the disk is to locate the symptom in the troubleshooting Symptom
Index (table 4-1).
b.
Next, go to the applicable flowchart or procedure for that symptom.
c.
The following general rules apply while performing troubleshooting:
(1)
Follow the troubleshooting flowcharts and procedures in the order indicated by the flow arrows or
sequence of procedural steps.
(2)
Perform only one instruction at a time.
(3)
Start at the beginning of the troubleshooting flowchart or procedure. Do not start in the middle.
4-10. TROUBLESHOOTING PROCEDURES
The procedures to follow provide the user with troubleshooting instructions and corrective action procedures required
when maintaining the disk unit.
WARNING
HIGH VOLTAGE is used in this equipment. DEATH ON CONTACT may result if safety
precautions are not observed.
DO NOT remove the HDA or cabling with the unit's power on. Position PWR ON/PWR
OFF switch to PWR OFF first.
CAUTIONS
Always handle the disk unit with extreme care, especially the HDA. Improper handling
of the unit can cause head crashes.
Always remove the HDA from the chassis/mainframe before attempting to install,
remove, or move the disk unit (para 2-7).
a. Smoke and Fire. In the event smoke and fire are encountered when operating the disk unit, immediately
disconnect the unit from the power source.
4-5
