IBM 2220 Nways 300, Service Manual

Page: 22 / 264

Notes:
a)
.A/
Wire (PN 80G3815)
b) Screws (PN 43G3084)
c) Star washers (PN 1622348)
2) 2220 Model 501 Ground Wire
When a 2220-501 is installed, check the presence of ground wire
.B/
between the
2220-500and the 2220-501 (see Figure 0-2).
Figure 0-2. 2220 Ground Wire B Between 2220-500and 2220-501
Notes:
a)
.B/
Wire (PN 80G3715)
b) Screws (PN 43G3084)
c) Star washers (PN 1622348)
3) ac/dc Power Cable Ground Wire
Ÿ
Check the mainline ac/dc power cable for damaged or burned pins and broken insulation
on all units.
Ÿ
Measure the resistance of the disconnected mainline ac/dc power cable from ground pin
on one end to the ground pin on the other end.
The reading should be 0.1 ohm or less.
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2220 Models 300, 500, and 501: Service Guide