4-16 Troubleshooting Model 2701 Service Manual
Table 4-9
Ω4 signal switching
Range Q101 Q102 Q114 Q136 Q109 K101* Q113 Q105 Q104 Q108 Q11
100Ω
1kΩ
10kΩ
100kΩ
1MΩ
10MΩ
100MΩ
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
SET
SET
SET
SET
SET
SET
SET
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
ON
* K101 set states: Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Table 4-10
Ω2/Ω4 reference switching
Range U133/0.7V U133/7V Q123 Q125 Q124 Q126 Q120
100Ω
1kΩ
10kΩ
100kΩ
1MΩ
10MΩ
100MΩ
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
Table 4-11
DCA signal switching
Range K103*
20mA
100mA
1A
3A
Set
Reset
Reset
Reset
* K103 set states: Pin 8 to 7
Pin 3 to 4
K103 reset states: Pin 8 to 9
Pin 3 to 2
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