Hitachi AMS 2000 Series Service Manual page 146

2. Carefully move the ENC cable out of the way so that you can access the
lock lever below it.
3. Push the blue lock button on the end of the lock lever inward to unlock
the lever. Then pull the lever outward from the ENC unit. As you do this,
the lever will pull the ENC unit out of the unit and unplug the unit from
the connectors inside the expansion unit. The ENC unit will now be about
1/2 inch (12 mm) out of the unit. See
4–40
Figure 4-23: AMS 2100/2300 ENC Cable Routing
Replacing parts
Hitachi AMS 2000 Family Storage System Service Guide
Figure 4-24.