Troubleshooting
Preliminary Checkout
Overall Troubleshooting
Font Panel Troubleshooting
Bias Assembly Troubleshooting
Backplane Board Troubleshooting
Calibration and Passwords
Before performing the Overall Troubleshooting procedures, perform the Preliminary Checkout
procedure below.
If the power system passes self-test and there are no obvious faults, perform the Verification
Procedures to determine if any power modules are not calibrated, or are not operating properly. This
will help isolate a problem to a specific power module.
The following test equipment is required for troubleshooting Keysight N6700 MPS mainframes:
l Keysight 34401A or equivalent - Digital multimeter for measuring voltage and resistance
SHOCK HAZARD. FAN HAZARD. Only qualified, service-trained personnel who are
aware of the hazards involved should perform the troubleshooting procedures
described here.
Preliminary Checkout
Is the instrument inoperative?
l Verify that the AC power cord is connected to the instrument.
l Verify that the front-panel On/Standby switch has been pushed.
Is the display working?
l If the display is hard to read, but the front-panel “line” LED is lit and the fans are working, the dis-
play contrast setting may be too light or too dark. Use the front panel menu to set the display con-
trast.
7 Service and Maintenance
414 Keysight N6700C Operating and Service Guide
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