Technical data

85108L System Manual
System Service and Troubleshooting
85108 IF/Detector Option 008 Pulsed-RF IF Path Troubleshooting Flowchart
6-15
Procedure 2: A2 Pulse IF MUX Test IF Path Check
Use this check only if the b1 or the b2 pulsed-RF IF signal path looks bad.
NOTE In the following two procedures, always return any moved cables to their original
connections before proceeding to the next step.
If the connections/setup correct the problem, carry out the instructions in the conclusion column. If
the problem isn’t corrected, proceed to the next step.
b1 IF Signal Path Check
Step Connections/Setup
Conclusion
(if the problem is corrected)
1 Move W55 cable on A11J5 to A11J6 replace A11 IF Mixer board
2 Move W46 cable on A2J7 to A2J1 replace W55 (A11J5 to A2J1)
3 If b2 IF signal is okay replace A2 pulse IF MUX board
4 Return to the pulsed-RF troubleshooting flowchart
b2 IF Signal Path Check
Step Connections/Setup
Conclusion
(if the problem is corrected)
1 Move W53 cable on A9J5 to A9J6 replace A9 IF Mixer board
2 Move W46 cable on A2J5 to A2J3 replace W53 (A9J5 to A2J3)
3 If b1 IF signal is okay replace A2 pulse IF MUX board
4 Return to the pulsed-RF troubleshooting flowchart