6-10 Replaceable Parts Model 2750 Multimeter/Switch System Service Manual
U125 IC, +15V VOLTAGE REGULATOR IC-1241
U127,U173,U174,U181,U196 IC, QUAD 2 IN AND, 74HCT08 IC-837
U128,U166 IC, OP-AMP, MC34081BD IC-1058
U132,U138,U139,U190 IC, OPA177GS IC-960
U133,U208 IC, CMOS ANAL SWITCH, DG444DY IC-866
U135 IC, 32-BIT MICROCONTROLLER, 20MHZ LSI-203-20
U136 IC, 2048 X 8 SERIAL E 2 PROM IC-1318
U137 IC, HI-SPEED BIFET OP-AMP, AD711JR IC-894
U140,U143 IC, PHOTO TRANS, TLP626BV-LFI IC-1006
U141 IC, PRECISION REFERENCE, LM399 196-600A
U142 IC, OP-AMP, NE5534D IC-802
U144 IC, +5V VOLTAGE REGULATOR,
LM2940CT
IC-576
U146,U179 IC, POS NAND GATES/INVERT, 74HCT14 IC-656
U147,U191 IC, TINYLOGIC CMOS INVERTER IC-1282
U148,U153 IC, QUAD 2 IN NOR, 74HCT02 IC-809
U149 IC, NCHAN LAT DMOS QUADFET,
SD5400CY
IC-893
U150 IC, OPTOCOUPLER, 2611 IC-690
U151,U152,U164,U193 IC, 512K X 8 BIT CMOS SRAM LSI-234-70
U154 IC, QUAD D FLIP FLOP W/CLK, RESET,
74HC175
IC-923
U155 IC, OPTOCOUPLER, 2601 IC-239
U156 PROGRAMMED ROM 2750-800A01*
U157 PROGRAMMED ROM 2750-801A01*
U158 IC, GPIB ADAPTER, 9914A LSI-123
U159 IC, +5V RS-232 TRANSCEIVER, MAX202 IC-952
U160 IC, OCTAL INTERFACE BUS, 75160 IC-646
U161 IC, OCTAL INTER BUS TRANS, 75161 IC-647
U163 IC, 8-CHAN ANA MULTIPLEXER,
DG408DY
IC-844
U165 PROGRAMMED ROM 2000-802A02*
U168,U183,U184 IC, DUAL D-TYPE F/F, 74HC74 IC-773
U170 IC, 2-INPUT OR GATE IC-1206
U171 IC, PHANTOM TIME CHIP IC-1317
U175 IC, DUAL HIGH CMR/SPEED OPTO,
HCPL-2631
IC-588
U182 IC, RETRIG., MULTIVIB, 74HC123AM IC-788
U187 INTERGRATED CIRCUIT SMT IC-1423
U188,U189 IC, PROTECTED QUAD POWER DRIVERS IC-1212
Table 6-1 (continued)
Model 2750 motherboard parts list
Circuit Designation Description Keithley Part No.
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