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NG1000 Troubleshooting Manual
Responding to alarms
Page 1-24
Issue 0.4 2010-10-12
Button/LED PWB Replacement
See Figures
MD-1
and
MD-2
in the Mechanical Drawings section (Section 6) of this manual.
1. Turn off the transmitter system and disconnect (or disable) its ac power sources.
2. Open the system cabinet’s rear door and locate the system controller (A1).
3. Disconnect all cabing from the rear of the system controller. Remove the system controller
from the system cabinet, noting it is secured using four front panel screws.
4. Place the system controller - top side up - on a suitable work surface. Remove the system
controller’s top cover, noting it is secured using M3 screws.
5. Disconnect ribbon cable connector W1P2 from the button/LED PWB (A1A2).
6. Remove the six M3 screws that secure the button/LED PWB to the system controller’s
front panel. Retain hardware.
7. Remove the button/LED PWB from the system controller, noting many of its parts
protrude through the front panel.
8. Locate or obtain a replacement button/LED PWB (Nautel Part # NAPX39). Reverse
Step 1
through
Step 7
to reinstall the new button/LED PWB. The transmitter should resume
normal operation and any associated alarms should clear.
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