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NG1000 Troubleshooting Manual
Responding to alarms
Issue 0.4 2010-10-12
Page 1-19
Cooling fan replacement
See Figure
MD-5
(bottom view) in the Mechanical Drawings section (Section 6) of this manual.
1. Disconnect the associated VHF transmitter’s (A or B) ac power source, disconnect all cabling
from the rear of the transmitter and remove it from the system cabinet.
2. Place the VHF transmitter - bottom side up - on a suitable work surface. Remove the
transmitter’s bottom cover, noting it is secured using M3 screws.
3. Disconnect all fan mating plugs (B1P1 through B5P1) from the splitter PWB (A4).
4. Slide the cooling fan assembly up and out of the transmitter chassis.
5. Remove the defective fan(s), noting they are secured using M3 screws. Retain hardware.
6. Obtain a replacement fan (Nautel Part # 216-8011) from the site spares kit, if purchased, or
contact Nautel to obtain a replacement fan.
7. Install the replacement fan using retained screws.
8. Re-install the cooling fan assembly in the transmitter chassis.
9. Reconnect the fan mating plugs to the splitter PWB.
10. Re-install the VHF transmitter’s bottom cover and return the transmitter to the system
cabinet.
Summary of Contents for NG1000
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Page 8: ...NG1000 Troubleshooting Manual Table of contents Page viii Issue 0 4 2010 10 12 ...
Page 10: ...NG1000 Troubleshooting Manual Page x Issue 0 4 2010 10 12 ...
Page 14: ...NG1000 Troubleshooting Manual Page xiv Issue 0 4 2010 10 12 ...
Page 22: ...NG1000 Troubleshooting Manual Page xxii Issue 0 4 2010 10 12 ...
Page 56: ...NG1000 Troubleshooting Manual Responding to alarms Page 1 34 Issue 0 4 2010 10 12 ...
Page 122: ...NG1000 Troubleshooting Manual Wiring connector lists Page 3 10 Issue 0 4 2010 10 12 ...
Page 128: ...NG1000 Troubleshooting Manual Reading Electrical Schematics Page 4 6 Issue 0 4 2010 10 12 ...
Page 153: ...Issue 0 4 2010 10 12 MD 6 Figure MD 6 NAPE82 Exciter Control PWB ...
Page 159: ...Issue 0 4 2010 10 12 MD 12 Figure MD 12 NAPA24 PA PWB C1 C2 C8 Q1 ...
Page 162: ...NG1000 Troubleshooting Manual List of terms Page 6 2 Issue 0 4 2010 10 12 ...
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