Agilent Technologies 53150A Service Manual page 64

Chapter 2 Service
Troubleshooting the Counter
Tables 2-4 and 2-5 list and describe the messages that are generated by
the Counter during Self-Test or during operation to indicate that a
problem has been detected. These messages are displayed on the Counter's
front-panel display and are also sent via the RS-232 serial output
(in many cases, the exact message text that is displayed on the front panel
is a condensed form of the message that is sent via RS-232).
Table 2-4. Front Panel Display Error Messages
Message
12V FAIL
–12V FAIL
–5V FAIL
ADC FAIL
PATH FAIL
THRS FAIL
THRS FAIL
THRS THRU
THRS HET
EEP WRT FAIL
FPANEL FAIL
FPGA FAIL
GPIB FAIL
HET PATH FAIL
IIC FAIL
INSTCFG FAIL
OVERTEMP
PWR CAL FAIL
PWR CKT FAIL
RAM FAIL
ROM FAIL
SAV SET FAIL
SERVICE FAIL
THRU FAIL
VCO/CNT FAIL
Assembly Level Service Guide
Description
The +12 VDC output from the power supply is not within specifications.
The –12 VDC output from the power supply is not within specifications.
The –5 VDC output from the power supply is not within specifications.
Failure detected in the ADC.
Failure detected in the Channel 1 signal path.
Failure detected in the Channel 1 threshold circuit.
Failure detected in the Channel 2 RF threshold circuit.
Failure detected in the Channel 2 through-path threshold circuit.
Failure detected in the Channel 2 heterodyne-path threshold circuit.
Failure detected while writing to EEPROM.
The front panel or its interconnecting cable is defective or not properly connected.
Failure detected in the FPGA (Field Programmable Gate Array).
Failure detected in the GPIB hardware.
Failure detected in the heterodyne-path circuit.
An attempt to write to the LCD display failed.
The instrument's configuration data is missing or has become corrupted.
The Counter's internal temperature is above the acceptable limit.
The instrument's power-calibration data is missing or corrupted.
Failure detected in the Channel 2 power-measurement circuit.
Failure detected in RAM.
Failure detected in ROM.
One or more of the sets of user settings is missing or is corrupted.
The instrument's service data is missing or has become corrupted.
Failure detected in the through-path circuit of Channel 2.
Failure detected in the VCO or the Count Chain.
2-17