Safety
¹
Power supplies for the 3745, 3746-900, and controller expansion at customer's premises are
switched OFF.
Do not remove the power cord and ground strap
.A/
of the controller expansion in order to maintain
the ground protection (see Figure 0-3 on page xxvii, Figure 0-4 on page xxviii, Figure 0-5 on
page xxix, or Figure 0-6 on page xxx).
1
External Covers
Check that:
¹
They are all present on the 3745, 3746s (if present), 3746-900, and controller expansion.
¹
They are locked with two kinds of locks: flat blade screw for the IBM access area and hex head
for the customer access area.
– Refer to the
IBM 3745 Communication Controller Models 130 to 17A, Parts Catalog,
S135-2012 for 3745 Model 17A.
– Refer to the
IBM 3745 Communication Controller Models 210 to 61A, Parts Catalog,
S135-2010 for 3745 Models 21A to 61A.
¹
They can be fully opened.
¹
Appropriate service clearance and access are provided around the frames with external covers
opened.
Leave all external covers opened to allow further safety inspection steps.
2
Safety Labels
Check that:
¹
All the safety labels are at the places indicated by the letters. See to the following paragraphs:
– “Safety Label Locations on the 3745 Models 17A” on page lxxvii.
– “Safety Label Locations on the 3745 Models 21A to 61A” on page lxxx.
– “Safety Label Locations on the 3746-900” on page lxxxiv.
¹
Each label is of the model corresponding to the letter as shown in the following paragraphs:
– “3745 Model 17A Safety Label Identifications” on page lxxix.
– “3745 Models 21A to 61A Safety Label Identifications” on page lxxxiii.
– “3746-900 Safety Label Identifications” on page lxxxv.
3
Safety Covers and Shields
Referring to the FRU location (Chapter 4), check that:
¹
All the safety covers are present and secured with screws.
¹
All the voltage terminal boards (TBs) are protected by a plastic shield screwed on top of the TB.
4
Grounding (Earthing)
Note
In this manual, "ground" means that the equipment must be connected to the earth.
a
Grounding on the 3745
¹
For the 3745 Model 17A, refer to page YZ110 for grounding jumper/contact locations.
¹
For the 3745 Models 21A to 61A, refer to page YZ110 to YZ114 for grounding
jumper/contact locations.
SAFETY
xxiii
Содержание FlashSystem 900
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Страница 276: ...3746 900 MAPs Figure 2 6 CP2 Circuit 2 18 3746 900 Service Guide...
Страница 325: ...3746 900 MAPs 026 continued Go to Step 014 on page 2 65 Chapter 2 MAPs for FRU Isolation 2 67...
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Страница 491: ...FRU Exchange R e a r S i d e Figure 4 21 3746 900 Connectivity Switch and DCDC Chapter 4 3746 900 FRU Exchange 4 25...
Страница 495: ...FRU Exchange Figure 4 23 3746 900 Rear of DC Power Box Chapter 4 3746 900 FRU Exchange 4 29...
Страница 510: ...FRU Exchange Figure 4 39 3746 900 LIC16 Coupler 4 44 3746 900 Service Guide...
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