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5700A/5720A Series II Calibrator
Service Manual
5-64
approximately a 50% duty cycle. Connect the oscilloscope to pin 6 of U14 and verify
it to be the compliment signal. If either signal is incorrect, U14 is probably at fault.
1 V
10 ms
F5-22.EPS
Figure 5-22. Waveform at Pin 10 of U6
9. Check CH1 SHUNT. Connect an oscilloscope to TP6 (common to TP3). Set the
Calibrator to 6.5V dc, operate, and set the oscilloscope to 2V/div at 2 ms/div. The
oscilloscope should display a signal similar to Figure 5-25. If a failure is detected,
check Q35 and its associated components.