Fujitsu MPC3096AT, MPC3102AT, MPC3084AT, MPC3043AT, MPC3032AT System level and field troubleshooting

	Table 1.3 System level and field troubleshooting
Check to be made	Recommended work
DC power cable	Confirm that the power cable is properly connected at the disk drive and
	power supply section.
DC power voltage	Confirm that the DC power voltage is within ±5% (+5 VDC) or ±8% (+12
level	VDC) of the standard value.
	When measured at pins 3 and 4 of the power supply connector, the +5 VDC
	must be 4.75 to 5.25 VDC.
	When measured at pins 1 and 2 of the disk drive power supply connector the
	+12 VDC must be 11.04 to 12.96 VDC.
DC power ripple	Check that the maximum ripple at +5 and +12 VDC power is less than
noise	100 mV peak to peak and 200 mV peak to peak respectively.
Interface cable	Confirm that the AT interface cable is properly connected at the disk drive
connection	and control unit.
Switch setting	Confirm that the switch on the switch on the disk drive control PCA is set
	for normal operation with the host computer. Refer to Section 3.4 in Product
	Manual for switching setting.
System cable	Confirm that all cable connections throughout the system correctly
	connected.
System diagnostic	To further isolate the failure, if it can be done, execute the system level
test	diagnostic routine described in the host computer manual.
Intermittent or	Check the AC voltage level at the power supply section and recheck the DC
indefinite error	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.

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