![background image](http://html2.mh-extra.com/html/keithley/2520/2520_service-manual_4001830106.webp)
6-8
Replaceable Parts
Model 2520 Pulsed Laser Diode Test System Service Manual
U38,U49
32 BIT BUS SWITCH, HOTSWITCH
LSI-260
U4
PROGRAMMED ROM
2520-802B01
U47
LARGE SCALE IC SMT
LSI-244
U48
IC, QUAD 2 INPUT OR GATES
IC-1365
U5
IC, GPIB ADAPTER, 9914A
LSI-123
U50
IC, QUAD 2 INPUT NOR GATES
IC-1363
U51,U52
IC, HEX INVERTER
IC-1366
U54
IC, 16 BIT MULTIPLYING DAC
IC-1359
U55
IC, DUAL FET OP AMP
IC-1128
U58
IC, 8 STAGE SHIFT, C074HC409AM
IC-1026
U59
IC, HEX INVERTER
IC-1367
U6
IC, OCTAL INTERFACE BUS, 75160
IC-646
U60
IC, HIGH PRECISION 10V REFERENCE
IC-1121
U7,U9,U11,U12,U14
IC, HCPL0631, PACK
IC-1153
U8,U10,U18,U34,U46
IC, POS NAND GATES/INVERT, 74HCT14
IC-656
VR1
DIODE, ZENER 30V, BZX84C30
DZ-106-30
W1-W4
JUMPER
J-24-1
Y1
CRYSTAL, FSM327
CR-41
Y2
OSCILLATOR, 30M
CR-56-4
Table 6-1 (continued)
Mainframe digital board parts list
Circuit designation
Description
Keithley part no.
Summary of Contents for 2520
Page 10: ......
Page 13: ...1 PerformanceVerification...
Page 30: ......
Page 31: ...2 Calibration...
Page 68: ...2 38 Calibration Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 69: ...3 RoutineMaintenance...
Page 72: ...3 4 Routine Maintenance Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 73: ...4 Troubleshooting...
Page 90: ...4 18 Troubleshooting Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 91: ...5 Disassembly...
Page 98: ...5 8 Disassembly Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 99: ...6 ReplaceableParts...
Page 116: ...6 18 Replaceable Parts Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 117: ...A Specifications...
Page 121: ...B CalibrationReference...
Page 132: ...B 12 Calibration Reference Model 2520 Pulsed Laser Diode Test System Service Manual...
Page 136: ......