Texas Instruments PHP1250 User manual

Texas Instruments Home Computer
Disk Memory Drive
Model No. PH P1250
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FEDERAL COMMUNICATIONS COMMISSION REQUIREMENTS
CONCERNING RADIO FREQUENCY INTERFERENCE
The Texas Instruments Home Computer and peripherals generate and use radio
frequency (RF) energy. If not Installed and used properly (as outlined In the tnstructlons
provided by Texas Instruments), this eqUipment may cause Interference to radIo and
television reception.
This eqUipment has been type· tested and found to comply with the limits for a Class B
compullng device In accordance with the specifications In Subparl J of Part 15 of FCC
Rules.
These rules are designed to provide reasonable protection against radio and
television Interference In a residential Installation. However, there Is no guarantee that
Interference will not occur In a particular Installallon.
If this equipment does cause Interference to radio or television reception (which you can
delermlne by turntng the equipment off and on), try to correct the Interference by one
or more of the followtng measures:
• Reorient the receiving antenna (that Is, the antenna for the radio or
teleVision that Is "receiVing" the Interference).
•
Change the position of the computer with respect to the radio or
televlston eqUipment that Is receiving Interference.
• Plug the computer Into a different wall outlet so that the computer and
the equipment receiving Interference are on different branch circuit".
If these measures do not eliminate the Interference. please consult your dealer or an
experienced radio/television tpchnl"lan for addillonal suggestions, Also. the Federal
Communications Commission has prepared ahelpful booklet, "How to Identify and
Resolve Radlo·TV Interference Problems." This booklet Is available from
The US Government Printing Office
Washington, D. C. 20402
Please specify Stock Number 004·000-00345-4 when ordering copies.
WARNING: ThiS eqUipment has been certified to comply with the limits for a Class B
computing device, pursuant to Subpart Jof Part 15 of FCC Rules. Only peripherals
(computer Input/output devtces. terminals. printers, etc.) certified to comply with the
Class B limits may bc attached to this computer, Operation with non.certlfied
peripherals Is likely to result In Interference to radio and TV reception.

Texas Instruments Home Computer
Disk Memory Drive
Model No. PHP1250
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IMPORTANT
Record the serial number from the Disk
Memory Drive and the purchase date In the
space below. The serial number is identified
by the words "SERIAL NO .... Always reference
thl5 Infonnatlon In any correspondence.
PHP1250
Model No. Serle1No.
Copyright ~ IVB2, Tex •• Instrumant, Incorporated

INTRODUCTION
The Texas Instruments Disk Memory Drive Is a high-speed. high-volume memory
device. Utilizing a 51,4 Inch diskette". the disk drive can rapidly locate. read from. and
write to any position or file on the diskette. The disk drive spins the diskette at a
constant speed and. under the direction of the TI Disk Drive Controller-. places the
magnetic read/write head at the desired position on the diskette.
This manual contains only the set-up. service. and warranty Information for the Disk
Memory Drive.
For instructions regarding setup. test. and operation of the complete
disk system. please refer to the Disk Memory System manual included with the Disk
Drive Controller.
Depending on the type of disk drive you are using. two possible configurations exist for
setting up the system. YOII "an have one internal disk drive that fits inside the
Peripheral Expansion System and up to two external drives. Or. you can have up to
three external drives connected to the system.
2

Disk Memory Drive
SET·UP INSTRUCTIONS
Once you've unpacked the unit, you're ready to Insert the Controller Card Into the
peripheral system, (Save the packing material for storing or transporting the unit.) The
steps Involved In Inserting and checking the operation of the Disk Drive Controller Card,
an Internal disk drive, and external disk drives are Inclul1el1 In this section. Ph::alS" r"au
this material completely before proceeding.
CAUTION
Electronic components can be damaged by static
electricity discharges. To avoid damage, do not
touch the connector contacts.
The Peripheral Expansion System unit has eight slots Into which accessory cards can
be Imlerted. The Peripheral Expansion Card must occupy slot number 1. (For
information on setting up the peripheral system, refer to the Peripheral Expansion
System owner's manual.) If you have an Internal Disk Memory Drive (Model PHP1250)
In
the Peripheral Expansion Systf'm unit. the Disk Drive Controller Card must occupy
slot number 8, Other cards can be Inserted In any of the remaining slots.
3

DI.1t 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.
DO THE FOLLOWING ONLY IF YOU
ARE USING TWO OR THREE DRIVESI
1. WARNING: ALL POWER CORDS MUST BE DISCONNECTED FROM THE POWER
OUTLETS DURING
THE FOLLOWING PROCEDUREI
2.
To remove the "over. do one of the folloWing.
• Internal Disk Drive - On the side of the disk drive is a tab located near the back
of the drive. On the back of the drive Is ahole designed to help 11ft the tab to
remove the disk drive cover. Remove the cover by llftlng the tab and then sliding
out the drive's contents .
• External Disk Drive -On all but one of your drives. use aPhl11lps·head
screwdriver to remove the six screws that hold the cover. Lift the cover off.
3. Locate
the main prtnted clrcull board. On It, locate the termination resistor pack. It
has 14 leads and looks llke an Integrated cirCUit. (Note: The main boards look
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.
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SHUNT PACK
TERMINATION RESISTOR PACK
4. Remove the termination resistor pack by prying each end up slightly with a small
screwdriver and then llftIng 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.
4

Disk Memory Drive
The procedure for setting up the Disk Memory System depends on the type of disk
drivels) 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 "Connectlng the Controller Card to External Disk Drives."
ConnectiD, the Controller Card to an Internal DI.k Drive.
1. Turn off the computer console and allll.ttached devlce5.
2. WARNING: TO AVOID DAMAGING ACCESSORY CARDS. WAIT TWO
(2) MINUTES
AFTER TURNING
OFF THE UNIT FOR THE POWER TO DISCHARGE BEFORE
PROCEEDING.
3.
Remove the top from the peripheral system by lifting the back edge of the top and
pull!ng up.
4.
Carefully place the Peripheral Expansion System on Its left side (the disk drive
compartment now should be at the top).
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5. Two screws which support thc front casing of the disk drive compartment are
located on the top and bottom of the peripheral system. Remove these screws and
place the peripheral system in Its proper upright position.
6. Remove the front casing from the opening of the disk drive compartment.
7. A three-wire power cord Is Inside the compartment. One end of this cord Is
connected to the peripheral system. Plug the loose end of the cord Into the four-pin
connector on the back of the disk drive.
POWER
CONNECTOR
eDGE CONNeCTOR
8. The connector cable Included with the Internal disk drive Is designed to connect the
drive to thc Controller Card. Insert the connector cable through the opening at the
back of the disk drive compartment so that the end with the edge connector Is Inside
the compartment and the end with the 34-pln connector Is by slot number 8.
5

9. Next. note that the label Identifying the Disk Drive Controller Card is on the top of
the card. On the front of the card Is an Indicator light. The light can be seen from
the front of the peripheral system unit when the card IS active. Huld lhe Disk Drive
Controller
Card so that the Indicator Ught faces the front of the peripheral system
and the connector tab faces the back of the unit.
CONNECTOR TAB
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10. Carefully aUgn the card with slot number 8 with the connector tab faCing the back
of the peripheral system. SUde the card halfway down Into the slot.
11.
Attach the 34-pln connector of the disk drive cable to the 34-pin connector on the
side of the tab on the Controller Card.
12.
Firmly press the Controller Card Into the slot until the connection Is made. Then
take up any slack In the cable by pulUng the excess through the opening Into the
disk drive compartment.
13. Attach the edge connector of the disk drive cable to the 34-pln connector tab on the
back of the disk drive.
14. Slide
the disk drive into the compartment so that the red Indicator Ught Is In the
top left-hand corner. Note: Align the screw openings on the top and bottom of the
peripheral system with the holes In the disk drive. If they do not line up. the drive
may be In upside down.
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15. Again. carefully place the peripheral system on Its left side. Two extra screws are
Included with the Internal disk drive. These screws are to be used to secure the
drive In the peripheral system. Insert two screws into the openings on the bottom of
the peripheral system. After they are secure. place the peripheral system in Its
proper upright position. and insert the other two screws In the openings on the top
of the system.
16. Replace the top on the peripheral system by sliding the front edge under the
extension on the front of the unit. Firmly press down on the back edge of the top.
Du
nul run the system without thc top [n place: the top en9ures proper ventilation.
Note: If the top does not fit properly. remove the card and realign It in the slot.
remembering to press down firmly until the connection is made.
6

Disk Memory Drive
Connecting the Controller Card to Both Internal and External Drives
1. If your disk system tncludes both an Internal disk drive (Model PHPl2501 and one or
more external drives (Model PHP1850l, first remove the termination pack from the
internal drive and install the Internal drive and the Controller Card, following the
Instructions In the preceding section.
2. Use the special cable included with the ControlIer Card to connect the external
drlve(s) to your system. Connect one end of the cable to the connector tab that
extends from the back of the peripheral system, making sure that the pins on the
tab align will, the holes on the connector cable.
3. Attach the adapter board Included with the ControlIer Card to the other end of the
cable.
4.
Each external drive has an attached cable with two connector,.. one at the end of the
cable and one near the middle of the cable. Attach the end of the disk drive cable to
the adapter board on the Controller's cable.
5. If
you are using two external drives, insert an adapter board into the connector in
the middle of the first disk drive's cable.
6. Connect the end of the second external drive's cable Into the adapter board of the
first external drive's cable. All but the last disk drive (If you are using more than one
drive) should have their termination packs removed. The drive farthest from the
controlIer should be the one that is not modified. Note: It may be necessary to rotate
the adapter board in order to insert It. It goes in easily if you have It positioned
correclly.
SPECIAL CABLE-'~~;;;W~2~!Jt~~
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The internal drive in the Peripheral Expansion System is considered DSK1. The first
external drive, the one connected directly to the ControlIer Card, is DSK2. The third
disk drive (farthest from the Controller) Is DSK3. The labels provided with your drlve(s)
can be used to identify each drive.
7

Connecting the Controller Card to Ezternal Disk Drives
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CONNECTOR TAB
1. Turn off the computer console and all attached devices.
2. WARNING: TO AVOID DAMAGING ACCESSORY CARDS, WAIT TWO (2) MINUTES
AFTER TURNING OFF THE UNIT FOR THE POWER TO DISCHARGE BEFORE
PROCEEDING.
3.
Remove the top from the peripheral system unit by Uftlng the back edge of the top
and pulUng up.
4. The labelldentlfylng the Controller Card Is on the top of the card. On the front of the
card Is an Indicator Ught. Hold the Disk Drive Controller Card so that the Indicator
llght faces the front of the peripheral system unit and the connector tab faces the
back of the unit.
5. Carefully align thc card with thc desired slot so that the connector tab face .. the back
of the peripheral system; firmly press the card down Into the slot untll connection
has been made.
6. Replace the top nn th .. peripheral system by sUdlng the front edge under the
extension on the front of the unit. Firmly press down on the back edge of the top. Do
not run the system without the top In place; the top ensures proper ventilation. Note:
If the top does not fit properly, remove the card and realign It In the slot, pressing
down firmly untll the connection Is made.
7. Each external drive has an attached cable with two connectors, one at the end of the
cable and one near the middle of the cable. Attach the end of the cable on the disk
drive to the connector tab on the Controller Card.
8. If you are using more than one external drive, Insert an adapter board Into the
middle connector of the first and second disk drive's cable. Note: It may be
necessary to rotate the adapter board In order to Insert It. It goe .. In easlly If you
have It positioned correctly.
8