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Troubleshooting
Interpreting Diagnostic Fault Codes
5
5-13
3122 A14/A15: HV AC 1kHz, Preamp (Lo)
The instrument is configured to the ac 1100V range with on amplitude of 220V at 1 kHz.
The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.
3123 A14/A15: HV AC 1kHz, Preamp (Mid)
The instrument is configured to the ac 1100V range with on amplitude of 600V at 1 kHz.
The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.
3124 A14/A15: HV AC 1kHz, Preamp (Hi)
The instrument is configured to the ac 1100V range with on amplitude of 1100V at 1
kHz. The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.
3125 A14/A15: HV AC 100Hz, Preamp (Lo)
The instrument is configured to the ac 1100V range with on amplitude of 220V at 50 Hz.
The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.
3126 A14/A15: HV AC 100Hz, Preamp Fault
The instrument is configured to the ac 1100V range with on amplitude of 600V at 50 Hz.
The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.
3127 A14/A15: HV AC 100Hz, Preamp (Hi)
The instrument is configured to the ac 1100V range with on amplitude of 1100V at 50
Hz. The output of the DC HV AMPLIFIER/AC SENSE BUFFER circuit of the High
Voltage/High Current assembly is measured for 0.0V ±0.2V. This voltage is divided to
create HV MUX2 which is routed to Diagnostic circuit on the High Voltage Control
assembly where it is connected to the SDL line for measurement by the adc circuit on the
DAC assembly.