Diagnostic Test; Troubleshooting Procedure; Troubleshooting Disk Drive Replaced In Field - Fujitsu MHG2102AT Maintenance Manual

1.3 Troubleshooting Procedure

To troubleshoot the failure reported in the test at this level, accurately reproduce
the condition that caused the failure. Then, by replacing the disk drive, try to
separate the fault from the other sections of the disk drive host system.

1.2.2 Diagnostic test

The diagnostic test is used to separate a confirmed disk drive failure to a disk
drive subassembly or to check the disk drive performance. A test of this level
usually includes a specific disk drive function or concentrated execution of a
group of functions. The test is usually performed by a factory engineer and not
where the failure was reported. The disk drive is tested using another host
computer or test equipment.
To troubleshoot the disk drive failure in the diagnostic test, the engineer will
reproduce the failure condition. The engineer then isolates the failure to a
subassembly or part of the disk drive.
The procedures used in a test of this level great depend on the test equipment
used. It is beyond the range of this manual.
1.3 Troubleshooting Procedure
1.3.1 Troubleshooting procedure
This section describes the troubleshooting procedures for a disk drive failure at
field maintenance level described in Subsection 1.1.3.
In this section, troubleshooting is made to isolate the reported failure to the disk
drive or a host system. Usually, troubleshooting is necessary only when a cause
of failure is uncertain or unknown. When a cause of failure is clear (for example,
abnormal sound in the DE or burnt parts on the PCA), a level of troubleshooting
is low.

1.3.2 Troubleshooting disk drive replaced in field

It is recommended that the whole drive be replaced in maintenance of this level.
If replacing the drive corrects the fault, return the old drive to the factory for
testing and repair. If the new drive shows the same fault as the one that was
removed, the failure is elsewhere in the system.
System level troubleshooting, shown in Table 1.3, is performed at the user site to
isolate the reported failure to the disk drive or system.
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Maintenance and Diagnosis
C141-F034-01EN