Troubleshooting Procedures - Seagate ST8741J Maintenance Manual

Voltage Checks
TABLE 2-2. DC VOLTAGE DISTRIBUTION
Voltage
Component
+5
v
-5
v
-12
v
+12
v
+24
v
Control Board
x x x x x
I/O Board
x
x
Status/Control
x x
x
Panel
Operator Panel
x x
x
Fan
x
TROUBLESHOOTING PROCEDURES
The troubleshooting procedures describe how to isolate and
correct common drive problems. Figure 2-1 is an example of a
troubleshooting procedure and explains the format. The
following paragraphs explain how to use the troubleshooting
procedures.
Before starting a procedure, ensure that all assumptions have
been satisfied. The assumptions along with other advisory
information are given in the introductory paragraph to the
procedure and describe conditions that must exist for the
procedure to be valid.
83325720 B
TROUBLE ANALYSIS
2-5