IBM FlashSystem 900, Service Manual

Page: 481 / 546

FRU Exchange
Exchange a Board
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 where you have to
exchange the board using Figure 4-9 on
page 4-8.
6. From the front of the machine, remove the
internal covers to gain access to the CSCE
cassette.
7. WARNING: Use the ESD kit and proce-
dures.
8. Remove CSCE and all the PRC cassettes
(plus SPS cassette for the basic board) from
the enclosure. (See the CSCE, SPS and
PRCs exchange procedure for details).
9. From the rear of the machine, remove the
internal cover to gain access to the SPD1 or
SPD2 cassette according to the board enclo-
sure that you want removed.
10. Unplug the SPD1 or SPD2 and all coupler
cassettes, but do not remove them from the
enclosure. (See the SPD1 or SPD2 and
coupler exchange procedure for details).
11. Remove the screws holding the board on the
enclosure.
.2/
12. Remove the board.
.3/
13. Install the new board using the screws previ-
ously removed.
14. Insert the PRCs, CSCE cassettes, and SPS
cassette for basic board, previously removed
in the enclosure. Slide them firmly in until
they stop clicking.
15. From the rear of the machine, slide SPD1 or
SPD2 and all the couplers firmly in until they
stop clicking.
16. Switch ON the main circuit breaker CB1
.1/
of
the ACPW and, if installed, of the second
ACPW/DCPW.
17. Return to the step in the MAP you were per-
forming.
Chapter 4. 3746-900 FRU Exchange
4-15