IBM 7208 345, Service Manual

Page: 31 / 68

Chapter 3. Maintenance Analysis Procedures
DANGER
To prevent a possible electrical shock from touching two surfaces with
different electrical grounds, use one hand, when possible, to connect or
disconnect signal cables. (RSFTD004)
DANGER
An electrical outlet that is not correctly wired could place hazardous voltage
on metal parts of the system or the products that attach to the system. It is the
customer’s responsibility to ensure that the outlet is correctly wired and
grounded to prevent an electrical shock. (RSFTD201)
Purpose of the MAPs
Maintenance analysis procedures (MAPs) are used to check the:
Power cable Configuration SCSI bus (signal) cable
Power supply Drive SCSI address
Terminator Fan
Media Drive head
If a problem is detected, the procedure isolates the problem to the failing field
replaceable unit (FRU), such as the 7208 Tape Drive cover, drive, power supply, or
cooling fan.
For instructions about removing or replacing a FRU, refer to “Chapter 4. Removal
and Replacement Procedures” on page 25.
Figure 8 on page 18 provides a flowchart to be used as a guide to the MAPs. For
detailed instructions on how to perform each procedure safely and correctly, refer
to the steps in this chapter.
© Copyright IBM Corp. 2000
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