IBM 2220 Nways 300, Service Manual

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To check the labels on the ACDC and/or DC48 power input and on the battery (if present) you must
remove these FRUs. Refer to Chapter 6, “2220 FRU Exchange” on page 6-1 for detailed instructions.
3. Grounding (Earthing)
Note
In this book "ground", means that the equipment must be connected to the earth.
a. Grounding of the 2220, NAS, display, and modem to the Premises Grounding System
Ÿ
Electrical continuity is assured between their frame ground and premises grounding system,
through their power cords.
Ÿ
For the 2220-300 and the 2220-500, an additional ground wire
.A/
is also used.
Ÿ
The 2220-501 is connected to the 2220-500 via a ground wire
.B/
(see Figure 0-2 on
page xx).
1) 2220 Model 300 and 500 Ground Wire
Check the presence of ground wire
.A/
on the 2220 (see Figure 0-1).
The ground wire
.A/
can also be installed on the top of the 2220 Model 300/500 frame if
necessary.
Figure 0-1. 2220 Ground Wire A
General and Product Safety
xix