Copyright © 2019, 2021, Hitachi, Ltd.
DKC910IHitachi Proprietary
[INST(RM)11-04-10]
Rev.2
INST(RM)11-04-10
11.4 Removing Controller Boards
1. Removing the Front Bezel
Remove the Front Bezel. (see “How to Attach/Remove the Front Bezel” (INST(GE)04-05-10).)
2. Checking the LEDs on Controller Boards in Controller Chassis to be removed
Check that the ALM LEDs (red) on all Controller Boards to be removed light up.
NOTE: The ALM LEDs (red) on the Controller Boards might not light up depending on
failure type.
When the ALM LEDs do not light up, be careful not to remove a wrong Controller
Board. Confirm the locations of the Controller Boards to be removed, and then go to
the next step.
Figure 11-1 Checking the ALM LEDs
Controller Board
ALM LED (red)
ALM LED (red)
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