IBM 3745 130, Maintenance Information Procedures

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Safety
Figure 0-10. Ground Wire Connection
This operation must be performed before any network connection.
Note: All the previous measurements should indicate 0.1 ohm or less.
e
Building Grounding
Ÿ Check that there is less than 1 V ac between the metal housings of plugs, connec-
tors, receptacles, and so on., and any grounded point in the building. This can be
any grounded metal structure, such as the stanchions of a raised floor (if they are
electrically connected to building ground), a metal water pipe, building steel, and so
on.
Notes:
1) When probing a painted metal part, ensure that the meter probe tip penetrates the
paint.
2) Also check plugs of incoming cables.
5
Circuit Breaker and Protector Rating
Refer to Table 0-4 on page xxx for CB and CP locations.
Check that:
Ÿ All CBs and CPs in the 3745 and 3746-900 are rated at the indicated value in Table 0-4 on
page xxx. If the rating is not indicated, check the part number against one of the following:
– IBM 3745 Communication Controller Models 130 to 17A, Parts Catalog, S135-2012
– IBM 3746 Expansion Unit Model 900, Parts Catalog, S135-2013
– IBM 3746 Nways Multiprotocol Controller Models 900 and 950, Parts Catalog, S135-2015.
Ÿ
The fuses in the controller expansion ac outlet distribution box must be 7 A, 250 V slow
(PN 58G5782).
6
Input Power Voltage
The power rating plate indicates the voltage range available (200/220/240) and the frequency
(50/60 Hz).
3745 Input Power voltage
The voltage label (label J) indicates the input voltage for which the 3745 is wired. This information
must be in accordance with Switch 1 on PS2.
Performing a power conversion Inspection.
Ÿ A power conversion inspection must be performed on any 3745 Communication Controller that
has been converted from 50 Hz to 60 Hz, or from 60 Hz to 50 Hz.
Ÿ The following is used only for the primary power box. Refer to Figure 4-1 on page 4-3 for
location.
Ÿ
Check Table 0-1 on page xxviii for the correct part numbers for the specified 50 Hz or 60 Hz
use. In case of discrepancy, contact your support structure.
Safety
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