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Printer/
Plotter
·
Cover
Ribbon Cable
Connection
J2
Figure 3 - lB .
Vertical Board Check
3 . 5
POWER S U P PLY C H E C K
The power supply check verifies the availabil ity of necessary power for
the compute r . To per form this check :
Check the fuse on the rear of the processor unit . Replace i f b l own .
1 .
2 .
Remove the covers on the IBM 9 00 1 . See Sect ion 5 . 1 , "Covers . "
Loosen the DC connectors (P 4 and PS ) on the rear of the power supply . .
3 .
See Figure 5 - 9 .
4 .
Connect the power cable to the processor unit .
5 .
Set the power switch to
Optional Diagnostic , Voltage, and Res is tance Checks 3 - 5
Board
Connection
J 1
Connection
P2
ON
"
. "
Cable Connection
P1
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