Nautel GV10, Troubleshooting Manual, Page: 80 / 326

GV10/GV7.5 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
PAGE 4.1.72 VERSION 3.2 2016-03-10
1. Turn off (disable) and lock out the transmitter’s ac power source, and UPS source (to LVPS), if
applicable.
2. Remove the transmitter’s upper, rear panel and open the front door.
3. From the front of the transmitter, remove the RF power modules that are mated with the module
control/interface PWB.
4. Disconnect the mating connectors from the module control/interface PWB.
5. Remove 14 sets of M3 nuts and washers that secure the module control/interface PWB to the
transmitter. Remove eight M3 screws that connect the PWB’s edge-card connectors to the
transmitter. Pull out the module control/interface PWB.
6. Obtain a replacement module control/interface PWB (Nautel Part # NAPC158B) and install it by
reversing the instructions in
Step 1 through Step 5 .
7. From the rear of the transmitter, set DIP switch S1 on the NAPC158B as follows:
8. Re-install the RF power modules.
9. Enable and turn on ac power to the transmitter.
10. Ensure new PWB has the same software as the original, and if necessary, perform a software
upgrade. Refer to the Operations and Maintenance manual for instructions.
11. The calibration data for the NAPC158B PWB must be synced from the controller. To sync the cal
data, navigate the UI menu as follows:
– System Settings -> Factory Settings -> Calibration -> Cal Backup -> Sync Cal -> Send Cal
to Racks
12. Return the transmitter to service.
S1 Position A3S1 Setting
6 OFF (right)
5 (F BTLDR) OFF (right)
4 (RS485 TERM) ON (left)
3 (ADDR 1) OFF (right)
2 (ADDR 2) OFF (right)
1 OFF (right)