IBM FlashSystem 900, Service Manual

Page: 496 / 546

FRU Exchange
Exchange an Enclosure (Basic or Expansion)
Important
Check that the 'Power Control' display is
set to local (3) on the control panel.
If not, do the following:
¹
Press the 'Power Control' key until (3) is
displayed in the power control window.
¹
Press the 'Validate' key.
If the state of the machine does not allow you
to display or to change the 'Power control'
mode, continue with the following procedure.
1. If the machine has its:
¹
Ready LED ON, go to step 2.
¹
Otherwise go to step 4.
2. Press the 'standby' key.
3. When the machine is in standby mode with its
Standby LED ON, go to the next step.
4. Switch OFF the main circuit breaker CB1
.1/
of the ACPW and, if installed, of the second
ACPW/DCPW.
5. Locate the enclosure that you want removed
using Figure 4-9 on page 4-8.
6. From the front machine:
a. Remove the internal covers to have
access to the CSCE cassette.
b. WARNING: Use the ESD kit and proce-
dures.
c. Remove the CSCE, SPS, and all the PRC
cassettes from the enclosure.(See the
CSCE, SPS and PRCs exchange proce-
dure for details).
d. Disconnect the two ground straps from the
enclosure.
.3/
F r o n t V i e w
7. From the rear of the machine:
a. Remove the internal cover to gain access,
to the SPD1 cassette if you change the
basic enclosure, or to the SPD2 cassette
if you exchange the expansion enclosure.
b. Unplug all the cables from the SPD1 or
SPD2 cassette.
c. Unplug all cables from the coupler cas-
settes. (See “Exchange an
ESCC/ESCC2” on page 4-32 and
“Exchange a TIC3” on page 4-51)
d. If you exchange the basic enclosure:
remove the SPD1 and all the coupler cas-
settes from the enclosure (see the SPD1
and coupler exchange procedure for
details).
If you exchange the expansion enclosure:
Remove the SPD2 and all the coupler
cassettes from the enclosure (see SPD2
and coupler exchange procedure for
details).
e. Remove the 8 screws which secure the
enclosure.
.4/
8. Pull the enclosure out from the machine.
4-30
3746-900: Service Guide