Fan Assembly, Removal And Replacement; Fan Assembly - IBM 3274 51C Maintenance Information

4.7 Fan Assembly, Removal and Replacement
(Figure 4-6)
1. Place the
m /
~
(on/off) switch in the
~
position.
2.
Remove the power cord plug from the building power
receptacle.
3.
Open the gate (paragraph
4.2).
4.
Remove the four hex mounting bolts
0
from plenum.
S. Disconnect the plug
0
from the fan assembly
~nd
disconnect the green and yellow grounding wire
e.
Early Version
Later Version
Two-Fan Version
Figure 4-6. Fan Assembly
Air
A
FlowV
6. Remove the fan assembly (two fans are present in
machines with
2400,4800,
or
9600
bps integrated
modem).
7.
Remove the four screws
CD
securing the fan to the
shock mount bracket.
8. Remove the fan.
9.
To reinstall, perform the sequence of steps in reverse.
Note: Observe direction of air flow
e.
I
DANGER .
You must reinstall the green-yellow grounding wire
removed in step 5.
Chapter 4. Removal and Replacement Procedures 4-7