VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 2.0 2023-04-20 PAGE 3.1.45
Power Supply (+12 V) Replacement
NOTE:
The USB provided with the transmitter contains videos (mp4 format) that support the
replacement procedures in this section. Go to the USB’s HOME screen and click VIDEOS. Videos for
replacing LRUs are listed in the Maintenance section.
NOTE:
The Exciter PWB, Analog Audio PWB and Exciter/Analog Audio PWB Support Bracket (Nautel
part # 235-8227) must be removed prior to replacing the Power Supply (+12 V). Refer to
Exciter PWB
Replacement - see page 3.1.37
and
Analog Audio PWB Replacement - see page 3.1.40
for instructions.
See MD-1or MD-2 in the Mechanical Drawings section of this manual to locate the power supply.
1. Turn RF off and disconnect ac power from the transmitter.
2. If applicable, remove and retain the four screws securing the transmitter in the rack.
3. Place the transmitter on a suitable workbench.
4. Remove and retain the 21 M3 screws securing the top cover. Remove cover.
5. Remove the Exciter PWB as per Exciter PWB Replacement - see page 3.1.37.
NOTE:
The SD card does not need to be removed for this procedure.
6. Remove the Analog Audio PWB as per Analog Audio PWB Replacement - see page 3.1.40.
7. Remove and retain the four M3 screws securing the Exciter/Analog Audio PWB Support Bracket
and remove. See Figure 3.1.11 on page 3.1.46.
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