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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F..~, .. ~ .. ~, .. ; .. ,; ... ;,,==~;;:;;;:~~~s::~2~- SCREW OPENINQS
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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

Disk Memory Drive
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9. Having removed the termination packs from all but the last drive (the one farthest
away from the Controller), connect the drives In series. The connector on the end of
the second drive's cable plugs Into the adapter board in the middle of the first drive's
cable. The third drive Is connected to the second drive In the same way. Whether
you have two or three drives, the drive farthest away from the controller should be
the one that has not been modified.
The first drive, the one connected directly to the Controller Card, Is Identified as DSKI
by TI BASIC. The second drive, connected to the cable of DSKl, Is DSK2. The third
drive Is DSK3. The labels provided with your drivels) can be used to Identity each drive.
CAUTION
Always disconnect the Peripheral Expansion System
before moving the computer cOl1sol". Th" cable
connecting the console and peripheral system Is not
designed to support the weight of the units. To
prevent damage, always disconnect all devices before
moving any part of your Home Computer system. For
long distance moves, remove all cards from the
Peripheral Expansion System and repack the devices In
their original packing material.
9

Starting the System
After the Controller Card has been fn"",rt"d Into the Peripheral Expansion System unit
and the drives have been connected, plug the power cords Into your electrical wall
outlets. Next, tum on the power switches on the backs of your external disk drives (If
any) and then the switch on the front of the peripheral system unll. Note: When you
turn on the peripheral system. the Internal disk drive Is automatically turned on.
WARNING
Each time you operate your computer/disk system,
follow this puwer-up sequence;
1. Turn on the external disk drives.
2. Turn on the Peripheral Expansion System unit.
3. Then turn on the monitor and computer console.
For proper memory allocation by the computer, the
Peripheral Expansion System must be ON when the
computer console Is switched on. Otherwise. the
disk drives, Controller Card, and Disk Manager
module wlll not function correctly. The computer
console must be turned off and turned back on In
order to restore normal operation.
When you turn on the console, the disk drives' working lights may come on briefly and
then go off. If they stay on, the disk drive cable Is probably plugged In uplSlde down.
Turn off all units and make sure that the disk drive cable connections have been made
properly.
10

Disk Memory Drive
CARING FOR DISKETTES
1. Handle the diskette by Its protective cover. Do not touch any part of the diskette's
surface; fingerprints wl1l destroy disk contents.
2. De careful not to bend the diskette.
3. Do not write on the diskette cover with a ball-point pen or pencil; only use afelt-tip
pen.
4. Do not scratch the surface of the diskette. Any scratch, even if too small to be seen,
may destroy all the information on a number of sectors. This usually causes
information to be lost lrom most of the flies UIl lhe dl5kette.
5. Do not expose diskettes to magnetic l1elds or excessive heat or cold.
6, Do
not place tape of any kind (masking or other) on the surface of a diskette.
7. Do not remove a diskette from" drive If the drive light is on.
11

IN CASE OF DIFFICULTY
If the disk system does not appear to be working properly, check the following:
1. Power -Be sure all devices are plugged in, Then tum on the power to the units In
the proper sequence: disl< drives and Peripheral Expansion System f1 .... t, followed by
the console and the monitor,
2, Card Po'<,ition - Turn the power off. walt two minutes, and remove the top of the
peripheral system. Verify that all cards are Inserted properly and then replace the
top.
3. Cable - Check to be sure that the proper cables are being used. 'Check the cables
for loose or broken leads. Check to see that the cables are properly connected, right
side up.
4. Peripheral Expansion System - Check for proper connection between the console
and peripheral system.
5. Home Computer - Check to see that the Home Computer works properly with all
accessories disconnected.
6. If none of the above procedures corrects the difficulty, consult "If You Have
Questions or Need Assistance" or see the "Maintenance and Service Information"
section of the User's Reference Guide.
12

Disk Memory Drive
EXCHANGE CENTERS (LOCAL SERVICE OPTIONS)
If some part of your disk system requires service, instead of returning it to a service
facility for repair or replacement, you may elect to exchange It for a factory
reconditioned unit by going in person to one of the exchange centers which has been
establlshed across the United States. A handllng fee wlll be charged by the exchange
center for in-warranty exchanges. Out-of.warranty .,xch,,"g.,~ will be charged at the
rates In effect at the time of the exchange. Please refer to the enclosed exchange fee
information and the location of the nearest exchange center.
To determine If there is an exchange center in your area, look for Texas Instruments
Exchange Center in the white pages of your telephone directory, or look under the
Calculator and Adding Machine heading in the yellow pages. Please call the exchange
center for availability and exchange fee Information. Write the Consumer Relations
Department for further details and the location of the nearest exchange center.
13

IF YOU HAVE QUESTIONS OR NEED ASSISTANCE
If you have questions concerning disk system repair or peripheral. accessory. or
software purchase. please call our Consumer Relations Department at 800-858-4565
(toll free within the contiguous United States except T"xa"j or 800-692-4279 within
Texas. The operators at these numbers cannot prOVide technical assistance.
For technical questions "hout programming. specific application. etc .. you can call
806-741-2663.
Please note that this Is not atoll-free number. and collect calls cannot be
accepted.
As an alternative. you can write to:
Consumer Relations Department
Texas Instruments Incorporated
P.O. Box 53
Lubbock. Texas 79408
Because of the number uf ISuggestions which come to Texas Instrument .. from many
sources containing both new and old Ideas. Texas Instruments will consider such
suggestions only If they are freely given to Texas Instruments. It Is the polley of Texas
Instruments to refuse to receive any suggestion .. In confidence. Therefore. If you wish to
share your suggestions with Texas Instruments. or If you wish us to review any BASIC
language program which you have developed. please Include the following statement in
your letter:
"All
of the information forwarded herewith is presented to Texas
Instruments on a nonconfldentlal. nonobligatory basis; no relationship.
confidential or otherwise. expressed or implied. Is established with Texas
Instruments by this presentation. Texas Instruments may use. copyright.
distribute. publish. reproduce. or dispose of the information In any way
without compensation to me."

Disk Memory Drive
THREE-MONTH LIMITEDWARRANTY
THIS TEXAS INSTRUMENTS DISK MEMORY DRIVEWARRANTY EXTENDS TO
THE ORIGINAL CONSUMER PURCHASER OF THE ACCESSORY.
WARRANTY DURATION
This DiskMemoryDrive is warranted for aperiod ofthree (3) months from the date oforiginal
purchase by the consumer.
WARRANTY COVERAGE
This DiskMemoryDrive is warranted against defective materials or workmanship. THIS
WARRANTY
18 VOID Ill' THE ACCESSORY HAS BEEENDAMAGED BY ACCIDENT.
UNREASONABLE
USE. NEGLECT. IMPROPERSERVICEOROTHER CAUSES NOT
ARISINGOUT
OF DEFECTSIN MATERIALS OR WORKMANSHIP.
WARRANTYDISCLAIMERS
ANY IMPLIEDWARRANTIESARISINGOUT OF THIS SALE. INCLUDING BUT NOT
LIMITEDTO
THE IMPLIEDWARRANTIES OR MERCHANTABILITY AND FITNESS
FORAPARTICULAR PURPOSE. ARE LIMITEDIN DURATIONTO THE ABOVE
THREE-MONTH PERIOD. TEXAS INSTRUMENTS SHALL NOT BE LIABLEFOR LOSS
OF USE OF THE DISK DRIVEOROTHERINCIDENTALORCONSEQUENTIALCOSTS.
EXPENSES. OR DAMAGES INCURRED BY THE CONSUMERORANY OTHER USER.
Some states do not allow the exclusion or limitationofimplied warranties or consequential
damages. so the above lim Ilations or exclusions may not apply to you.
LEGALREMEDIES
This warranty gives you specific legal rights. and you may also ha VI: oUler J"1ghts that vary
from state to state.
WARRANTY PERFORMANCE
During the above three-month warranty period. your DiskController and Disk Manager
module will be repaired or replaced with a new or reconditioned unit ofthe same or equivalent
model (atTI'soption)
when the unit is returned by prepaid shipment toa Texas Instruments
Servtce Facility listed below. The repaired or replacement unit will be warranted for three
months from date of repair or replacement. Other than the postage requirement. no charge
wUl be made for the repatr or replacement of In-warranty unIts.
TEXAS INSTRUMENTSCONSUMERSERVICEFACILITY
U.S. Residents
Texas Instruments ServiceFacility
2303 North University
Lubbock.
Texas 79415
Canadian Residents
GeophysicalServicesIncorporated
41 ShelleyRoad
Richmond Hm. Ontario. Canada L4C5G4
Consumers in California and Oregon may contact the following Texas Instruments offices for
additional
assistance or ini"ormation.
Texas Instruments Consumer Service
831 South Duuglas Street
El Segundo. CA 90245
(213)973·1803
Texas Instruments Consumer Service
6700 Southwest 105th
KrIstin Square. Suite 110
Beaverton. Oregon 97005
[phone]
15

PRINTED IN u.s .....
Ti!'ra.< Instruments Invented the Intearated circuli.
the microprocessor. and the microcomputer.
Belngjlrst Is our tradlllon.
TEXAS INSTRUMENTS
INCORPORi\lrO

ADDENDUM
Disk Memory System and Disk Memory Drive Manuals
Connecllng lhe Conlroll.r C.rd 10 .n Inl.mal Disk Drlv.
The Installation directions given on pages 9and 10 of Ihe TI Disk Memory System manual and on
pages 5and 6of the TI Disk Memory Drive manual are Incorrect. To install an Internal drive and
connect It to the COntroller Card, please follow the procedure lIated
here.
1. Turn off the computer console and all allached 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 tha top from the peripheral system by depressing the latches on the back edge of the
top and pulling up.
4. Two Philllps·head screws allach the front casing of the disk drive compartment. One Is
located on the top at the peripheral system, and the other Is on the DeHorn of the unit.
Remove the top screw.
5. Carefully place the Peripheral Expansion System on Its left side (the disk drive compartment
now should
be at the top). Remova tha .crew on the bollom of the peripheral syslem.
Note: Save the screws to secure the Internal disk drive In place after It Is Installed In the
Peripheral Expansion System.
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6. Place the peripheral system In Its proper upright position, and remove the front casing from
the opening of the disk drive compartment.
(Save the tront casing In case you want to r.mov.
the Internal disk drive from the Peripheral Expansion System later.)
7. Two flexible cables are packed with the Controller Card: one Is for connecting an Internal diSk
drive, and the other
Is for connecting external drives. Locate the cable which has dlffer.nt
types of connectors at each end; this Is tha cable used 10 connect the Controller Card 10 the
Internal drlva.
(Sava tbe cable with Id ..nlical connectors at each end for connecting external
drives.)
Examine the connnector tab on the side
of the Controller Card and the 34-pln conneclor on
the Internal disk drive conneclor cable. Nole Ihe proper orlenlatlon of Ihe Iwo; you will have
to connect tbem througb a 0101 al tbe back of Iha drlva compartment afler Ihe Controller Card
Is In place. The lab and the 34·pln connector are keyed so that Ihey can only be oonnected In
one
way.
8. Next, note thatlhe label Identifying Ihe Disk Drive Controller Card Is on the lop of the card.
On Ihe front of the card Is an' Indicator light. The light can be seen from the 'rant 0' the
peripheral syslem unit when the cerd
Is active.
Copyright © 1982 by Teu. In.trumentllncofl)Orated
..... _._ .. ,_ • I '" •'0603'0.2
IUNwith '0383-I5-2aod '030353-11

ADDENDUM
IIIIDIC;AToa LIGHT
9. Hold the Disk Drive Controller Card so that the Indicator light faces the front of the peripheral
system and the connector tab faces the back of the unit. Carefully align the card with slot
number 8
and press down firmly until the card is In place. (The card can be placed In any slot,
but the cable thon Interferes with other slots.)
10. Attach the 34·pln connector of the disk drive cable to the 34·pln connector on the side of the
tab on the Controller Card. You will have to reach through the disk drive compartment to do
this. (If you look down into the Peripheral Expansion System from the top, you can see the
conneclor as you make Ihe connectlun.)
11. Afour·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. This connector is also keyed to fit only one way.
.,
POWEll
CONHfCTO"
EOGE COHHfCTOfil
12. Attach the edge connector of the disk drive cable to the 34·pin connector tab on the back of
the disk drive.
13. Two screws hold the cover of the disk drive In place. Remove Ihese screws, using aPhillip.·
head screwdriver, and save the screws for installing the disk drive.
14. Slide the disk drive into the compartment so that the red indicator light is in the lop left·hand
corner.
Note: Align the screw openlnos nn In" top and bottom of the parlpheral system with
the holes
In the disk drive. If they do not line up, the drive may be in upside down.
_t-_+_IHOlCATOR LIGHT