Fujitsu MJA2080BH, Product/Maintenance Manual

Page: 297 / 320

7.3 Troubleshooting Procedure
Table 7.3 System level and field troubleshooting
Check to be made Recommended work
DC power voltage
level
Confirm that the DC power voltage is within
±
5% of the standard value.
When measured at +5 V power pins P8 or P9 and GND pins P4-P6, P10,
or P12 of the power supply connector, the +5 DVC must be 4.75 to 5.25
VDC.
Refer to Sections 3.3 and 5.1.4
.
DC power ripple
noise Check that the maximum ripple at +5 VDC power is less than 100 mV.
SATA Interface
Connection
(Including a
Connection of
Power Segment)
Confirm that the SATA interface at the drive is properly connected with
the host receptacle.
System cable Confirm that all cable connections throughout the system correctly
connected.
System diagnostic
test To further isolate the failure, if it can be done, execute the system level
diagnostic routine described in the host computer manual.
Intermittent or
indefinite error Check the AC voltage level at the power supply section and recheck the
DC voltage level at the disk drive power supply connector.
If the AC voltage level is abnormal, or if there is a lot of electrical noise,
notify the user.
If the DC voltage level is unstable, replace the power supply section.
If possible, replace the disk drive. If the fault remains, the disk drive is
not the case. For suggestions to isolate the failure further, refer to the
hardware and software manuals provided with the system.
C141-E293 7-13