TM11-7025-229-12
Section III. OPERATION UNDER USUAL CONDITIONS
2-5.
INTRODUCTION
This section provides instructions for operating the disk unit under usual conditions. Should equipment operating
problems arise when attempting to use the disk unit, report the malfunction on DA Form 2404 (DA PAM 738-750).
WARNING
DO NOT operate equipment without a suitable ground connection. Electrical defects in
the unit, test equipment, or load equipment can cause DEATH by electrocution when
contact is made with an ungrounded system.
HIGH VOLTAGE is used in this equipment. DEATH ON CONTACT may result if safety
precautions are not observed.
2-6.
OPERATING PROCEDURES
a.
Preliminary Procedures.
(1)
Connect disk unit to prime power source.
(2)
Ensure that PMCS has been accomplished before operating the equipment (para 2-4).
NOTE
Rapid changes in temperature may cause the disk unit to fail until the ambient
temperature has stabilized throughout.
(3)
If required, exchange the Head Disk Assembly (HDA). Refer to paragraph 2-7 for HDA change-over
instructions.
b.
Operating Procedure.
(1)
Position the PWR ON/PWR OFF toggle switch to PWR ON.
(2)
Verify that the PWR RDY indicator lights.
NOTE
If upon application of power to the disk unit any unusual noises from the HDA area are
noted, turn off power immediately. Refer to chapter 3 for maintenance instructions.
2-8
