VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 2.0 2023-04-20 PAGE 3.1.65
Pre-Amplifier/IPA PWB 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.
See MD-1or MD-2 and MD-8 in the Mechanical Drawings section of this manual.
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 the cover.
5. Disconnect the three cables connected to the IPA PWB (RF Input from J1, RF Output from J2, and
ribbon cable from J3). See Figure 3.1.41.
Figure 3.1.41: IPA Cable Removal
6. Remove and discard the five M3 screws securing the IPA PWB to the Mounting Block.
7. Remove the IPA PWB from the Mounting Block.
CAUTION! The Pre-Amplifier/IPA PWB is static sensitive and must be handled in a
static protected manner.
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