Disk Drive Information - Texas Instruments PHP1240 Manual

Disk Drive Information

As It comes from the factory, a disk drive Is ready to run as the only drive on your
system. If you are using more than one drive, complete the following steps for all but
one of the drives. The last external drive should be connected without being altered.
1 . WARNING: ALL POWER CORDS MUST BE DISCONNECTED FROM THE POWER
OUTLETS DURING THE FOLLOWING PROCEDURE!
2. To remove the cover, do one of the following .
Internal Disk Drive
•
of the drive. On the back of the drive Is a hole designed to help lift the tab to
remove the disk drive cover. Remove the cover by lifting the tab and then sliding
out the drive's contents .
External Disk Drive
•
screwdriver to remove the six screws that hold the cover. Lift the cover off.
Locate the main printed circuit board. On It, locate the termination resistor pack. It
3.
has 14 leads and looks like an Integrated circuit.
slightly different on the Internal and external drives, but the pack Is In the same
place on each.) Be careful not to disturb the strapping pack (or shunt pack, which Is
also removable) located very near the resistor pack.
4. Remove the termination resistor pack by prying each end up slightly with a small
screwdriver and then lifting It out. Pull straight up.
5. Save the single drive termination resistor pack so that you can reinsert It If the drive
Is ever to be used again as a single or last disk drive. If you do replace the pack, note
that If the socket for the resistor pack has more holes than there are pins on the
pack, the pack should be Installed toward the outer edge of the circuit board, leaving
the unused holes toward the center of the board.
6. Replace the cover on the drive, aligning and tightening the screws carefully. DO
NOT OPERATE ANY UNIT WITHOUT REPLACING THE COVER.
The procedure for setting up the Disk Memory System depends on the type of disk
drlve(s) you have.
If you have an Internal drive only, see "Connecting the Controller Card to an
•
Internal Disk Drive."
If you are using an Internal disk drive with one or more external disk drives,
•
follow the directions In "Connecting the Controller Card to Both Internal and
External Disk Drives."
If you have one or more external drives and no Internal drive, follow the directions
•
In "Connecting the Controller Card to External Disk Drives."
8
DO THE FOLLOWING ONLY IF YOU
ARE USING TWO OR THREE DRIVESI
On the side of the disk drive Is a tab located near the back
-
On all but one of your drives, use a Phillips-head
-
(Note:
The main boards look
SHUNT PACK
TERMINATION RESISTOR PACK