Key Tronic KB 5151jr User manual

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A word about R.F. interference
from the FCC ..
1
This equipment generates and uses radio frequency energy and if not
installedand used properly, i.e., in
strict accordancewith the manufac-
turer’s instructions, may cause interference
to radio and television
reception. It has been
type tested and foundtocomplywith the limits
for a Class
B computing device in accordance with the specifications
in Subpart
J of Part 15 of FCC Rules, which are designed to provide
reasonable protectionagainstsuch interferencein a residential installa-
tion. However there
is no guarantee that interference will not occur
in
a particular installation. If this equipment doescause interference
to radio or television reception, which can be determined by turning
the equipment
off and on, the user is encouraged to try to correct
the interference by one
or more of the following measures.
’
Reorient the receiving antenna.
Relocate the computer away from the receiver.
Move the computer with respect to the receiver.
Move the computer away from thereceiver. Plugthecomputer
into
a differentoutlet so that computer andreceiver are on dif-
ferent branch circuits.
If necessary the user should consult the dealer or an experienced
radio/television technician for additional suggestions. The user may
find thefollowing booklet prepared by the Federal Communications
Commission helpful:
“How to Identify and Resolve Radio-TV Interference Problems”
This booklet
is available from the U.S. Government Printing Office,
Washington, D.C.
20402. Stock No. 004-000-00345-4.
Thisequipment is suppliedwith a shielded cable. It must use a shielded
cable in order
to meet FCC Class B emission limits.
3
2 Key Tronic

Table of Contents
Introduction .........
I
Installation ......
Keyboard Features. ...
Typewriter Area ......
Function Keys .......
Cursor Control Keypad ....
Numeric Keypad ..............
I Key Operation Comparison Chart
Technical Data.
..............
Theory of Operation . .
Maintenance. ....
Technical Assistance ..
.. 9
..... 10
. 11
..... 12
..... 13
____. 15
___._ 19
..... 19
KB 5151jr 3

Introduction
The Key Tronic' KB 5151jr' * keyboard is a direct plug compatible
replacement
for the IBM' * * PCjr computer keyboard. There are no
software modificationsor specialinterfacesneeded. The KB
5151jr
performsallfunctionsdescribed in the IBM PCjr Guide to Operations
handbook while incorporatingkeyboard changes and other features
for greater flexibility and user convenience.
Key Tronic,world leaderin keyboards, has listenedto the market com-
mentary
on theIBM Pcjr keyboard design and has chosen to include
features the KB 5151jr not found on the PCjr keyboard. These
features enhance ease of operation and
in no way alter the normal
function
or use of your personal computer.
So, whether you are just entering the computer world or using the
PCjr to supplementoffice projects, the full-travelfull-sizeKB
515ljr
with its professionalfeaturesmakestransition simple. Ergonomiccom-
fort, high reliability, industry standardization,reduced data entry er-
rors
- all these and more are hallmarks of Key Tronic quality. Now
you can enjoy allthebenefits of professionalcomfortandconvenience
designed and built for you by the industry professional.
'Key Troflic is a rqistered bademark of Key Tronic Corporation.
"KB 5151f is a trademark of Key Tronic Corporation.
"'IBM and PCjr
are trademarks of International Business Machine Corporation.
4 Key Tronic

Installation
To install the KB 5151jr keyboard, proceed as follows.
1.Place the computer'spower switch
to the Off position, "0
-
2. Plug in the KB 5151jr keyboard.
KB 515111 5

Installation Cont’d.
3. Place the PCjr computer’s power switch to the On position, “I”.
A beep will be heard after thecomputer has checked itself and finds
that everythingis working correctly.
Your KB 5151p keyboard is
then ready for use.
If no beep is heard, refer to your IBM PCjr Guide to Operations
for assistance. Use Section 6 “TestingYourIBM PCjr”to help you
solve any difficulty that may arise. You are also welcome to con-
tact our Product Support Specialistsfor assistance.
See Technical
Assistance in the back
of this manual.
NOTE: SomeIBM test instructionsmay refer to using the Fn (Func-
tion) key. Substitute the Ctrl (Control)
key of the KB 5151jr for
the Fn key of thePCjrkeyboard. For example, if you wish to discon-
tinue running Test Tag
J on the KB 5151jr, press and hold the
Ctrl key and then depressthe Break key when instructedto“press
the Fn key and then the B (Break)key.”
6 Key Tronic

Keyboard Features
When compared to the IBM PCjr keyboard,majordifferencescan be
seen in the general layout
of the KB SlSljr,. Separate cursor and
numeric keypads and relocation of the program funchon keys (F1
through F10)acrossthe top are changesincorporated
to enhance use
of your keyboard.
Another feature is the statusLED (lightemittingdiode) indicatorson
the Caps and Num Lock keys. A frequent cause
of keyboard data
entry
error is theaccidentalsetting of thesekeys.Toreducethe number
of such errors, the KB 5151jr incorporatesthe LEDs to indicate CUT-
rent mode. You can now tell at aglancein which mode the key is set.
The KB
5151jr. as opposed to the IBM PCjr keyboard, returns cer-
tain keysto standard locationsand placesthecharacterlegend of each
key on
its keytopfor easierkey identification.This style reducescon-
fusion
in locating and selecting desired keys and functions.
The keyboard is divided into
four sections: the Function Keys, the
Typewriter Area, the Cursor Control Keypad, and the Numeric
Keypad. Each section
will be discussed in detail.
1
KB 5151jr 7

Keyboard Features Cont’d.
Typewriter Area
Efficiency and accuracyareenhanced by full-sizesculptured keytops
with easily read legends and raised tactile indexes on the
F and d
“home” keys.
On theleft-hand side ofthetypewriterarea. .
Many awkwardkeystrokecombinationsare eliminatedby deletion of
the Fn key and addition
of “one press” functionkeys.The Key Opera-
tion Comparison chart on page 12 shows equivalentkeystrokes for
the desiredfunctions. For PCjr programs using the Fn key, the Ctrl
key performs the same function.
The
Caps Loek key is relocated and an LED in-
dicator is addedtoshowits currentmode. When the
LED
is illuminated, the letters A through Z are
automaticallydisplayed
in uppercase.
NOTE: Someprogramsmay altermemory locationssetasideforCaps
Lock status.
If this happens, the LED will not showthe correct mode
of the
Caps Lock key. As a result, when the Caps Lock LED is il-
luminatedand an alphabetkey is depressed,the letter will be displayed
in lowercaseinstead of uppercase. Thissituationcan be correctedby
pressing and holdingthe
Beset key (this will not reset the computer)
and then depressing the
Caps lack key. For details, see Theory
of Operation, pages 15-18.
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8 Key Tronic

3
On therisht-handside of the typewriter area. ..
A Grave key is added above the Return key. The
use of the Alt key (as on the PCjr keyboard) is no
longer needed when using this key. To obtain the
tildesymbol
(3, hold down the Shift key and then
depress
the Grave key.
A Betcup key replacesthe former PCjr Enter key.
Normally the function of the Return key is to end
a line-of-text by moving the cursor from the last
character
of a line to the first character position of
the next line following. The Return key also per-
forms"enter" functions
as presaibed by the applica-
tion program.
A Back&& key is addednext ta the right Shift key.
The use of the Alt key, as on the PCjr keyboard,.is
not needed. To
obtain the upper character, hold down
the
ShW key and then prev the Baclulaeh key.
[-1
0
Il.tum
Function Keys
All rogram function keys are located acrossthe top of the keyboard
antnewkeys have been added.
Keys F1 through F10 function the
same
as described in your IBM PCjr Guide to Operations, however,
use of these keys does not require the need of a Fn (Function)key
as on the PCjr keyboard.
Paus is relocatedto the program functionkey row.
Pressing
Pause will stop your program, or suspend
operation
of the system, so that you can read the
screen. Preaingany key other than Pause will resume
program operation.
The
Me (PrintScreen)key is relocated from the
typewriter area to the program functionkey row on
the
KB 5151jr keyboard. If you are linked to a
printer,
ShW + will cause a print out of the
information appearing on the screen.
The
Baa key is an addedfeature. Cld + Besa
will cause a systemreset.Thiskey ahenablesmode
reset
of the Caps Lock LED and Num Lock LEDs.
For resetting these keys, read the
NOTE following
the description of these keys.
KB 5151jr 9

Keyboard Features Cont'd.
Function
Keys Cont'd.
Cum Pad is an added key that controlsthe status
of the Cursor ControlKeypad. The LED located on
its keytop indicates whether the keypad is enabled
or disabled. Note, however, that when
the cursor
keypad
is disabled and the numeric keypad is in its numeric mode,
the numerickeypad must be returned
to its cursor mode (NumLock
LED
Off) before the Cursr Pad key can be used to reactivate the
cursor keypad.
Cvrlr
a
Cursor Control Keypad
I"..*
3
The KB 5151jr incorporates a separate Cursor Control Keypad
dedicatedto cursorand editfunctions.
On power-up.both CursrPad
and Num
Lock LEDs are illuminated and their associated keypads
active.Afterpower-up, pressingthe CursrPad key turns
Off its status
LED, deactivatesthe cursor control keypad, and transferscontrol of
cursor and edit functions to the numeric keypad. To reactivate the
cursor keypad, the numeric keypad
must be in its cursor mode (Num
Lock LED
Off) before depressing the Cursr Pad key.
NOTE: Some softwareapplicationsmay alter memory locationsset
asideforcursorand numerickeypad operation.
In suchcasesthe cur-
sor controlkeypad could generatenumbersinstead of cursorand edit
functions. To correct
this situation,deactivate the cursor keypad by
pressing the
Cum Pad key. Next, press and hold the Reset key
andthen depressthe
Num Lock key. This will resetthecursor keypad
to its proper mode. For more information,
see Theory of Operation,
pages 15-18.
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Key Tronic