Keithley 2425 Service Manual page 103

6-12 Replacement Parts
Table 6-1 (cont.)
Analog board parts list
U503
U504
Circuit designation
U505
U511,U512
U515
U601
U604
U605
U607
U608
U609
U660,U661
VR200,VR201
VR202,VR203,VR407,VR408,VR409,
VR506
VR214,VR215
VR400,VR401
VR410,VR514,VR515,VR601,VR604
VR500,VR501,VR502,VR503
VR507
VR509,VR510
VR600
VR602,VR603
VR605,VR606
Y600
*Order current firmware revision, for example 2400.801A01
IC, +5V VOLTAGE REGULATOR,
LM2940CT
IC, POS VOLTAGE REG +15V,
500MA, 78M15
Description
IC, NEG VOLTAGE REG -15V,
500MA, 79M15
IC, PROGRAMMABLE TEMP
CONTROLLER
IC, HIGH SPEED OPTOCOUPLER
IC, QUAD D FLIP FLOP W/CLK,
RESET 74HC175
IC, NCHAN LAT DMOS QUADFET,
SD5400CY
IC, OPA177GS
IC, OP-AMP, NE5534D
IC, VOLT. COMPARATOR,
LM311M
PROGRAMMED ROM
IC, 16 BIT DAC, AD7849BR
DIODE, ZENER MM524694 TI
DIODE, ZENER 5.1V, BZX84C5V1
DIODE, ZENER, 8.2V, MMBZ5237
DIODE, ZENER 4.7V, 1N4732A
DIODE, ZENER 3.3V,
MMBZ5226BL
DIODE ZENER 12V, MMSZ12T1
DIODE, ZENER 5.1V, BZX84C5V1
DIODE, ZENER 15V, 1N4744A
DIODE
DIODE, ZENER, 6.2V, MMSZ6V2
DIODE, ZENER 17V, MMBZ5247BL
OSCILLATOR HIGH SPEED CMOS
12MHZ
Model 2425 Service Manual
IC-576
IC-194
Keithley
part no.
IC-195
IC-1062
IC-1173
IC-923
IC-893
IC-960
IC-802
IC-776
2400-801*
IC-1004
DZ-113
DZ-88
DZ-92
DZ-67
DZ-94
DZ-112
DZ-88
DZ-75
DZ-127
DZ-97
DZ-104
CR-37