8 Compaq TL881/TL891 Family MiniLibrary System Drive Upgrade Procedure
Compaq Confidential – Need to Know Required
Writer: Bob Young Project: Compaq TL881/TL891 Family MiniLibrary System Drive Upgrade Procedure Comments:
Part Number: ER-TL891-DA. B01/127511-002 File Name: b-ch1 Adding a Second Drive.doc Last Saved On: 11/3/99 9:42 AM
3. Disconnect the drive power Y cable from the power supply
connector.
4. Disconnect the drive 1 RS-422 cable from the controller PWB end.
5. Remove two M4 x 8 mm flat-head screws from along the upper edge
of the drive caddy assembly.
6. Remove two M4 extension screws from the top of the drive caddy
assembly.
CAUTION: Be careful not to break the door levers when you lift the drive caddy
assembly out of the Base Module in the next step. To prevent this, steady the
caddy so it cannot rock forward as it clears the platform when you’re lifting it
up, and do not allow the door levers to touch the strut across the top of the Base
Module.
7. Grasp the handle on top and lift the drive caddy assembly out of the
Base Module carefully. Make sure you tilt the rear end of the caddy as it
is being removed so the door levers don’t bump against the chassis
crossbrace.
8. Set the drive caddy assembly on the work surface and install the second
tape drive as described in “Installing the Second Tape Drive.”
Replacing
To replace the drive caddy assembly in the Base Module:
CAUTION: Be careful not to break the door levers when you set the drive caddy
assembly down in the Base Module. To prevent this, steady the assembly as you
lower it by the handle so it cannot rock forward as it approaches the platform,
and do not allow the door levers to touch the strut across the top of the chassis.
1. Grasp the drive caddy assembly by the handle, tilt the front end down at
a slight angle, and then lower it into position in the Base Module. Orient
it as shown in Figure 4.
2. Replace the two M4 extension screws at the top of the assembly.
3. Coat the threads of the two M4 x 8 mm flat-head Phillips screws with
Loctite 222, and replace them on the upper edge of the drive caddy
assembly.
4. Connect the drive 0 and drive 1 RS-422 cables to the controller PWB.
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