Fujitsu MAN3367FC Manual/User Guide - Page 96
Table 6.2, System-level field troubleshooting
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Diagnostics and Maintenance Table 6.2 System-level field troubleshooting Item AC and DC power level Electrical noise Drive selection address System cables System diagnostic test Intermittent or nonfatal errors Recommended work Check that the DC voltage is within the specified range (±5%). Check that the +5 VDC value (pin of the interface connector) is 4.75 to 5.25 VDC. Check that the +12 VDC supply (pin of the interface connector of disk drive) is 11.4 to 12.6 VDC. Make sure the maximum ripple peak-to-peak value of +5 VDC is within 250 mV and +12 VDC is within 250 mV. Check that the disk drive selection address is set correctly. Check that all system cables are connected correctly. When possible, execute the system level diagnostic routine as explained in the host computer manual. This gives a detailed report of a possible fault. Check the AC voltage from the power supply. Check the DC voltage level at the power connector for the disk drive. If the AC voltage level is abnormal or there is a lot of electrical noise, notify the user of the error. If the DC voltage level is unstable, replace the power supply unit. If possible, replace the disk drive. If replacing the disk drive does not eliminate the error, the removed disk drive is probably not faulty. To continue error analysis, refer to the hardware and software manuals supplied with the system. 6-14 C141-E133-02EN