Texas Instruments 990 - Page 201

~-~~~~~~---~~~----~---~
~ 945424-9701
TOOL
DEV NO
CPS
[j]
+5V
13 12 II
14
IC3
2
3 4
Rl5
'------ALL MODULES TYPE "A" UNLESS
0T$RWlSE NOTED
10
6
J± 0+5V
_j_ C22 + C23
I T
+5V
7
9
5
8
IC2'-----.
Rl7
I 2 !
VOLUME
CONTROL
CRIB
~~··
_&
TC20
KEY
34
RPT
lrUT
I +~
R4
+5V
KEYBOARD
PARTS
LIST
I RESISTORS Alt[ 1/4 W CARION !1%
TOI.. ANO CAPACITORS AR£ 11 WVOC MIN
IJ.. UNLESS OTitERWIS£ SPECIFIED ·
!!.\ :~ O:~t
1
~:!! ~~~cii::~;~
AVAILABLE
3 EQUIVALENT COMPONOITS MAY IE sua -
STITUTED
LOCATION MFG TYP DESCRIPTION Ml~~l~o. QTY
1.
4
?-1 3
1-1
15
16
17
18
lQ
20,21
22
23
24
Pl
P2-P4
TYPE"A"
TYPE"B"
L25
Tl
C934002
SN/4154
S;>;/5450B
6. 8K.!1..
IOK.ll..
l.2Kl"l.
270.t'l..
150./l.
22n
C7?2
I }Lid
15 pfd
• lpfd
15 p.fd
3, 57MHZ
+5V
9
Pl
13 12 Q
MICRO
SD-01 S:;S
PROCESSOR
40 Pl!\;
SD-20117
SOCKET
IC
SW-12077
JC
RESISTOR
SW-12195
RESISTOR
SW-11288
RESISTOR
SW-10106
RESISTOR
FP-10039
RESISTOR
SD-20004
RESISTOR
SW-10773
DIODE
RW-10017
CAPACITOR
SW-10610
CAPACITOR
SD-20181
CAPACITOR
RW-10438
CAPACITOR
RW-10382
Cf<YSTAL
SD-2020 3
HOUSING-
SD-11534
PLASTlC
CONNECTOR
SD-11568
CON?\ EC TOH SD-ll589
P.C. BOARD
SD-015:;1
PANEL
SD-01552
MODULE IOOISD1A3S
MODULE l001SD2A3
L.E.D.
SD-11576
DDDDDDDD
BBBBBBBB
~Q~~~~~rJ
&
~rJ~~mrn~ .. ~ ..
GROUNDING -
STUD -
90
1
I
I 2~5~
LOCK SWITCH &
4 - SuPPLY +s.o :::0.25 VDC
&-
MEASURED AT CO='INECTOR
TERMINALS
CONNECTOR PlNS (MA TING
PORTION ONLY) ARE TO BE
REMOVED FLUSH WITH.
BODY OF CONNECTOR
WITHIN. 03},C' AS FOLLOWS
Pl - PINS 13, 24, 26
PZ - PINS 2, 5
P3 - PINS 2, 3
P4 - Pins 1, 3
"'
"'
MICRO SWITCH
.. 90ltT, ILL U.S.A.
TIUSDRAl119' C:.0YEll1 A P1101"1UETAJIYITll AMJ llTME P'lttftll:TY
Df •CRO SllfCH, ,t, DIYJSICll Of MOEYHLL. TlllS IMAIPIK IS mDT
TllBEC:IWIEDlllll!ED•TllOUTTHEAP'P'IOVALDF.Clt0511TtH.
Figure F-11t. Japanese Katakana Keyboard Assembly Logic
Diagram and Contact Matrix
F-19/F-20
Digital Systems Division