Ω 2 Signal Switching; Ω 4 Signal Switching; Ω 2/ Ω 4 Reference Switching - Keithley 2015 Service Manual

4-22 Troubleshooting
Table 4-7
Ω 2 signal switching
Range Q101 Q102
100 Ω
ON ON
1k Ω
ON ON
10k Ω
ON ON
100k Ω
ON ON
1M Ω
ON ON
10MΩ ON ON
100MΩ ON ON
* K101 set states:
K102 reset states:
Table 4-8
Ω 4 signal switching
Range Q101 Q102
100Ω ON ON
1kΩ ON ON
10kΩ ON ON
100kΩ ON ON
1MΩ ON ON
10MΩ ON ON
100MΩ ON ON
*K101 set states:
Table 4-9
Ω 2/ Ω 4 reference switching
Range U133/0.7 U133/7V
100Ω OFF ON
1kΩ OFF ON
10kΩ OFF ON
100kΩ ON OFF
1MΩ ON OFF
10MΩ OFF ON
100MΩ OFF ON
Q114 Q136 Q109
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF ON
OFF OFF ON
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Pin 8 switched to Pin 9
Pin 3 switched to Pin 2
Q114 Q136 Q109
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF ON
OFF OFF ON
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Q123 Q125
ON ON
ON ON
OFF OFF
OFF OFF
OFF OFF
OFF OFF
OFF OFF
K101* K102* Q113
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
SET RESET OFF
K101* Q113 Q105
SET ON OFF
SET ON OFF
SET ON OFF
SET ON OFF
SET ON OFF
SET OFF ON
SET OFF ON
Q124 Q126 Q120
OFF OFF ON
OFF OFF ON
ON ON ON
ON ON ON
ON ON ON
ON ON OFF
ON ON OFF
Q105 Q104 Q108
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON OFF OFF
ON OFF OFF
Q104 Q108 Q121
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF ON
Q121
ON
ON
ON
ON
ON
ON
ON