Keithley 224 - Page 52

Table 63. Display Board, Parts List (Cont.)
Circuit
Desig.
s221
s222
S223
S224
S225
u201
u202
U203
U204
Description
Pushbutton Switch
Pushbutton Switch
Pushbutton Switch
Pushbutton Switch
Pushbutton Switch
MOS to LED Segment Driver, 75492
MOS to LED Segment Driver, 75492
B-bit Shift Register, 74LS164
MOS to LED Seament Driver. 75492
Location
Keithley
Sch Pcb Part No.
A2 F3
A2 G3
82 F3
E 2
SEV 83
SEV c3
C5 D3
SEV E3
SW-435
SW-435
SW-435
SW-435
SW-435
IC-169
IC-169
IC-127
IC-169
6-6