Keithley 2700 Service Manual page 15

4 Troubleshooting
Table 4-1 Power supply components ...................................................... 4-5
Table 4-2 Display board checks ............................................................ 4-11
Table 4-3 Power supply checks ............................................................. 4-11
Table 4-4 Digital circuitry checks ......................................................... 4-12
Table 4-5 DCV signal switching ........................................................... 4-13
Table 4-6 ACV and FREQ signal switching ......................................... 4-13
Table 4-7 Ω2 signal switching .............................................................. 4-14
Table 4-8 Ω4 signal switching .............................................................. 4-14
Table 4-9 Ω2/Ω4 reference switching ................................................... 4-14
Table 4-10 DCA signal switching ........................................................... 4-15
Table 4-11 ACA signal switching ........................................................... 4-15
Table 4-12 DCV signal multiplexing and gain ....................................... 4-16
Table 4-13 ACV and ACA signal multiplexing and gain ........................ 4-16
Table 4-14 DCA signal multiplexing and gain ....................................... 4-16
Table 4-15 Ω2 signal multiplexing and gain ........................................... 4-17
Table 4-16 Ω4 signal multiplexing and gain ........................................... 4-17
Table 4-17 Switching device locations ................................................... 4-17
5 Disassembly
Table 5-1 Input terminal wire colors ....................................................... 5-7
Table 5-2 Power module wire colors ...................................................... 5-7
6 Replaceable Parts
Table 6-1 Model 2700 motherboard parts list ......................................... 6-3
Table 6-2 Model 2700 display board parts list ........................................ 6-8
Table 6-3 Model 2700 connector board parts list ................................... 6-9
Table 6-4 Model 2700 miscellaneous parts list ..................................... 6-10
Table 6-5 Model 7700 parts list ............................................................ 6-11
Table 6-6 Model 7702 parts list ............................................................ 6-12
Table 6-7 Model 7703 parts list ............................................................ 6-13
Table 6-8 Model 7705 parts list ............................................................ 6-14
B Calibration Reference
Table B-1 Remote calibration command summary ................................ B-2
Table B-2 DC calibration commands ..................................................... B-8
Table B-3 AC calibration commands .................................................... B-13
Table B-4 Model 7700 calibration commands ...................................... B-16
Table B-5 Calibration error summary ................................................... B-21