Installation guide

Troubleshooting
Troubleshooting Assembly Level Problems
1-51
800 1 GHz Detector
• Replace the A18 Reference.
801 Tuning Voltage
• If the supply voltages are good on the J10 connector pins indicated:
a. Turn power off to the signal generator.
b. Remove the A18 Reference and ohm the connection between the appropriate J52 and J10 pins.
— If the connection is good, replace the A18 Reference.
(Refer to “A18 Reference” on page 2-42.)
— If the connection is bad, replace the A19 Daughterboard.
(Refer to “A19 Daughterboard” on page 2-44.)
• If the supply voltages are bad on the J10 connector pins indicated:
a. Check the origin of the supply.
— If the supply voltage is good at the origin, replace the A23 Motherboard.
(Refer to “A23 Motherboard” on page 2-52.)
— If the supply voltage is bad at the origin, troubleshoot the problem using that assembly's
troubleshooting procedure.
802 AM Mux and DACs
• Replace the A18 Reference.
803 FM Mux and DACs
• Replace the A18 Reference.