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MODEL 1793/6423
REPLACEABLE PARTS
TABLE 6-1
Replaceable Parts List (Cont'd)
Circuit
Schematic
PC-Board Location
Mfr.
Mfr.
Keithley
Desig.
Description
Location
1793
6423
Code
Desig.
Part No.
3501
3witch, 31ide, Line
Voltage 3elect
B-3
C-2
D-2
C-W
GF326-
0006
SW-397
3502
3witch, Dip
C-2
E-4
F-4
CTS
CTS206-7
SW-377
T501
Transformer, Power
B-2
C-2
E-2
K-I
~
TR-178
U501
IC,CM03, 8-3tage.
3tatic Shift Register
B-5
E-2
F-2
RCA
CD4021AE
IC-130
U502
IC, CMOS, Hex Inverter
Several
D-2
E-2
RCA
CD4049AE
IC-106
U503
IC, CMOS, Presettable,
divide by N Counter
A-4
E-2
F-2
RCA
CD4018AE
IC-145
U504
IC, Bus Transceiver,
Octal Bidirectional
G-3
B-4
C-4
MOT
MC3447P
IC-229
U505
IC, Bus Tranceiver,
Quad Interface
G-4
C-4
D-4
MOT
MC3446AP
IC-134
U506
IC, Flip Flop, Dual "D"
F-6,G-5
D-4
E-4
T-I
74LS74N
IC-144
U507
IC, Hex, Inverting
Schmitt Trigger
Several
D-4
E-4
T-I
SN7414N
IC-153
U508
IC, Quad 2-Input
NAND gate
Several
D-4
E-4
T-I
74LS00
IC-163
U509
Peripheral Interface
Adapter
E-4
C-4
D-4
AMI
S6821L
LSI-8
U510
IC, Quad, 2-Input
AND gate
Several
D-4
E-4
T-I
74LS08
IC-215
U511
8 Bit Microprocessor
D-4
C-5
D-5
MOT
MC6802
LSI-18
U512
Programed, IC-220
for 1793/6423
E-1
D-5
E-5
K-I
Special
PRO-103-00
U513
IC, Hex 3-State Buffer
D-1
E-5
F-5
T-I
74-LS367
IC-161
VR501
+5V Voltage Regulator,
3 terminal
C-3
E-4
F-4
MOT
MC7805CP
IC-93
Y501
Crystal, 4.0 MHz
D-4
C-5
D-5
CTS
MP040
CR-10
* Manufacturer's Designation includes part description.
6-3
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