Testing The Drive; Field Test Units; Maintenance Tools And Materials - Seagate ST8741J Maintenance Manual

Electrostatic Discharge Protection
•
Never use an ohmmeter on any circuit boards unless
directed to in troubleshooting procedures.
•
Do not touch pins on power supply connector JlS. Power
supply circuitry is sensitive to electrostatic discharge.
MAINTENANCE TOOLS AND MATERIALS
The maintenance procedures described in this manual require the
use of certain special tools. test equipment. and materials.
These are listed in table 1-1 along with the appropriate
I
Seagate part number. Note that the list includes only special
tools. We assume that you have normal maintenance tools.
How to use the items listed in table 1-1 is described in the
~
procedures as they are required. Additional information is
provided on the optional status/control panel (see section 2.
Trouble Analysis) and the field test unit (see Testing the
Drive).
TESTING THE DRIVE·
During testing and troubleshooting. the drive is normally
required to perform various operations such as reading and
writing test data. Either a field test unit or system software
can be used to control the drive during these operations.
FIELD TEST UNITS
The TB2A3-G programmable field test unit (PFTU) is recommended
for use with SMD and SCSI interface drives (see table 1-1 for
tester part numbers). Testers are not currently available for
drives with an IPI interface. The tester allows the drive to
be operated and controlled independent of the rest of the
system. For specific instructions on operating the tester. see
the tester manual.
The following procedure describes how to connect the tester I/O
cables to an SMD interface drive in place of the system I/O
cables. For instructions on connecting a tester to a SCSI
interface drive. refer to the manual provided with the SCSI
tester.
83325720 F GENERAL MAINTENANCE INFORMATION
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