Keithley 2520, Service Manual, Page: 134 / 137

P
Parts lists 6-2
Mainframe digital board 6-3
Mainframe display board 6-9
Miscellaneous 6-16
Pulse board 6-13
Test head board 6-10
Performance Verification 1-1
Performing the verification test procedures 1-6
Test considerations 1-7
Test summary 1-6
Power line fuse 3-3
Power-on self-test 4-3
Principles of operation 4-4
Analog circuits 4-7
A/D converters 4-7
Measurement circuits 4-7
Source circuits 4-9
Digital circuitry 4-11
Digital signal processor 4-11
Display board circuits 4-11
I/O circuits 4-11
Microcontroller 4-11
Overall block diagram 4-5
Power supply 4-10
R
Recommended test equipment 1-5
Resistor characterization 1-5
Remote calibration 2-22
command summary 2-22
procedure 2-23
Removing power components 5-6
Power module removal 5-6
Power supply module removal 5-6
Repair considerations 4-2
Resetting the calibration password 2-8
Restoring factory defaults 1-6
Routine Maintenance 3-1
S
Safety considerations 4-2
Specifications A-5
Static sensitive devices 5-3
T
Testhead connections 1-7, 2-10
Testhead disassembly 5-7
Case disassembly 5-7
Input board removal 5-7
Output board removal 5-7
Testhead re-assembly 5-7
Troubleshooting 4-1, 4-13
Analog circuitry checks 4-16
Digital circuitry checks 4-15
Display board checks 4-13
Power supply checks 4-14
U
Unlocking calibration 2-7
by remote 2-7
from the front panel 2-7
V
Verification limits 1-6
Example limits calculation 1-6
Verification test requirements 1-4
Environmental conditions 1-4
Line power 1-4
Warm-up period 1-4
Viewing calibration dates and calibration count
2-9
Voltage bias source accuracy 1-15
Voltage bias source commands B-8
DATA? B-9
SOURce B-8
Voltage measurement accuracy 1-8