Table 4-6 Acv And Freq Signal Switching - Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual
Table 4-6
ACV and FREQ signal switching
Range
100mV
1V
10V
100V
750V
Range
100mV
1V
10V
100V
750V
* K101 and K102 reset states: Pin 8 switched to Pin 9
K101 and K102 set states:
Q101 Q102 K101*
ON ON RESET
ON ON RESET
ON ON RESET
ON ON RESET
ON ON RESET
U105 U105 U103
Pin 9 Pin 8 Pin 16
OFF OFF OFF
OFF OFF ON
ON OFF OFF
ON OFF ON
ON ON OFF
Pin 3 switched to Pin 2
Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Troubleshooting
U103 U103
K102* Pin 8 Pin 9
RESET ON ON
RESET ON ON
SET OFF OFF
SET OFF OFF
SET OFF OFF
U103 U105 U111
Pin 1 Pin 1 Pin 16
ON ON OFF
OFF OFF OFF
ON ON OFF
OFF OFF OFF
OFF OFF OFF
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