Replacing SA7x FRUs
7.5 Transition Board 1 Removal and Installation
7.5 Transition Board 1 Removal and Installation
TB1 is located behind the OCP inside the SA7x enclosure.
7.5.1 Removing Transition Board 1
Use the following procedure to remove TB1:
1. Take all of the drives in the enclosure off line and release the Run switches to
spin down the drives. Wait until all Ready lamps are off. (See Section 4.4.)
2. Remove power to the enclosure by turning off the Master On/Off switch.
3. If the cabinet has a cabinet stabilizer foot installed, extend it. (Refer to
Figure 7–2.)
4. Remove the OCP. (See Section 7.3.)
5. Loosen the four mounting screws (located at each corner of the enclosure) and
slide the enclosure frame partially out of the cabinet. Pull out only enough of
the frame to give access to TB1.
WARNING
Be careful when pulling out the enclosure frame for access to its internal
components. A stop mechanism in the chassis locks the frame at a point
that allows access to the transition boards and the fan assembly. This
stop mechanism locks the chassis so that the frame is three-quarters of
the way out of the chassis. If you release this stop, nothing prevents the
frame from being pulled completely free of the chassis.
6. Disconnect the two ribbon cables from TB1. (Refer to Figure 7–5.)
Note
TB1 mounts to the frame with two corner screws (in slotted holes) and
one center screw. The center screw can be inserted through one of two
adjacent holes in the frame, depending upon the position of the enclosure
in the cabinet. The frame is marked with two cabinet symbols adjacent to
the holes. As you face the frame, the right hole is for enclosures mounted
in the left side of a cabinet; the left hole is for enclosures mounted in the
right side of the cabinet.
7. Remove the center screw and two corner screws that secure TB1 to the front
panel of the enclosure.
8. Lift TB1 out of the enclosure.
7.5.2 Installing Transition Board 1
Use the following procedure to install TB1:
1. Align the replacement TB1 and secure it in the enclosure with the three
screws.
2. Connect the two ribbon cables from TB2.
3. Slide enclosure frame back into the cabinet and secure it in place with the
four mounting screws.
Replacing SA7x FRUs 7–9
