
Diagnostics and Maintenance
6-14
C141-E133-02EN
Table 6.2
System-level field troubleshooting
Item
Recommended work
AC and DC power level
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.
Electrical noise
Make sure the maximum ripple peak-to-peak value of +5 VDC is within
250 mV and +12 VDC is within 250 mV.
Drive selection address
Check that the disk drive selection address is set correctly.
System cables
Check that all system cables are connected correctly.
System diagnostic test
When possible, execute the system level diagnostic routine as explained
in the host computer manual. This gives a detailed report of a possible
fault.
Intermittent or nonfatal errors
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.
Summary of Contents for MAN3367FC - Enterprise 36.7 GB Hard Drive
Page 1: ...C141 E133 02EN MAN3735FC SERIES MAN3367FC SERIES DISK DRIVES PRODUCT MAINTENANCE MANUAL ...
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Page 21: ...Contents C141 E133 02EN xv Glossary GL 1 Abbreviations AB 1 Index IN 1 ...
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Page 66: ...Installation Requirements 4 10 C141 E133 02EN Figure 4 10 SCA2 type connector ...
Page 110: ...Principle of Operation 8 8 C141 E133 02EN Figure 8 3 Block diagram of read write circuit ...
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