System 75 Small-Cabinet to R8si (Blowback)
Task List: System 75 Small Cabinet to R8si
298
SI Installation and Upgrades
June 2004
1
To ensure that the port circuit packs (in the A and B carriers) and the power units (in the B carrier)
are properly replaced, label each component with its slot number.
2
Disconnect the power cords from the power units in the B carrier.
3
Remove all port circuit packs from carriers A and B and the power units from carrier B. Store the
circuit packs in the static-proof packaging.
4
Remove the circuit-pack blanks from slots that do not contain circuit packs.
5
Remove the front trim plate from the A carrier by pulling straight off.
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Remove tape drive [75 small upgrade]
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NOTE:
The tape drive does not have to be physically removed at this time. You can disconnect it
now, and then remove it after you complete the upgrade and time is less critical.
1
Remove the tape.
2
Disconnect the AHF4 cable adapter from behind slot 07 of control carrier A (see
Figure 71, R1V3
System 75 cabinet,
on page 299).
3
Open the snap connectors to remove the adapter from the tape drive’s ribbon cable. Route the
cable back to the tape drive and remove it. (There are 2 cable clamps on the cabinet’s side panel.
Use a screwdriver to unsnap them.)
Neither the cable nor the adapter will be used in the upgraded cabinet.
4
Disconnect and remove the tape drive.
— On the HCMR tape drive, disconnect the power supply from the front of the unit. Then
remove the screws at the rear of the unit that attach the drive to the chassis, and slide the
tape drive out the front of the cabinet.
— On the RMSS tape drive, disconnect the red and black wire. Remove the faceplate. Then
remove the screws that hold the unit to the chassis. Slide the drive out the front of the
cabinet.
5
Coil the red and black wire in an out-of-the-way position in the cabinet.
6
Install the 176A Apparatus Blank over the empty space left by the removal of the tape drive.
