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VS1 Troubleshooting Manual
Responding to alarms
Issue 10.0 2018-10-29
Page 1-47
Combiner Interface PWB Replacement
See Figure
MD-2
(top view) in the Mechanical Drawings section (Section 6) of this manual.
1. Remove the transmitter’s bottom cover. Retain hardware for re-installation.
2. Disconnect the four tinned copper wire jumpers that are connected to pads A, B, C and D.
3. Remove the four M3 screws that secure the combiner interface PWB to the transmitter
chassis. Do not remove the two screws next to the pins of J1 (one on either side of J1).
Retain hardware.
4. Remove the combiner interface PWB from the transmitter by pulling straight up (i.e.,
disconnecting from edge card connector). Note the orientation of the PWB for installing the
replacement PWB.
5. Locate or obtain a replacement combiner interface PWB (Nautel Part # NAPI136). Reverse
Step 1
through
Step 4
to reinstall the new combiner interface PWB
.
If necessary, refer to the
Wiring Lists section (Section 4) for wiring details for A12.
6. Reinstall the transmitter’s bottom cover.
7. Re-install the transmitter in its host cabinet, reconnect all interconnect cables and restore
operation by enabling ac and RF power.
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