NX25/NX15 Troubleshooting Manual
Responding to alarms
Issue 5.0 2016-05-06
Page 1-63
RF drive distribution PWB replacement
.
Figure 1.13: Location of RF Drive Distribution and Rack Interface PWBs
1. Turn off the ac power at the source. Open the back door and verify the green LEDs on the
power module interface PWBs are off, indicating the capacitors are discharged. For
additional safety, measure the dc voltage across the + and - terminals of any of the large,
electrolytic capacitors on the floor of the cabinet. There should be little or no voltage.
2. Disconnect all cables attached to the RF drive distribution PWB, taking note of the
connector labels on the cables and the PWB.
3. Carefully remove and save seven sets of mounting hardware.
4. Remove the PWB from the transmitter.
5. Reverse
WARNING:
Lethal voltages exist inside the transmitter when the power is turned
on. Turn off the power at the source and wait until the 10 bright
green LEDs on the power module interface PWBs - in the back of each
cabinet - are off before removing any connections or PWBs.
PWBs located
on underside
of this chassis
Back Door and Side Panel
Removed for Clarity
Summary of Contents for NX15
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Page 8: ...NX25 NX15 Troubleshooting Manual Page viii Issue 5 0 2016 05 06...
Page 78: ...NX25 NX15 Troubleshooting Manual Responding to alarms Page 1 70 Issue 5 0 2016 05 06...
Page 96: ...NX25 NX15 Troubleshooting Manual Detailed Circuit Descriptions Page 2 18 Issue 5 0 2016 05 06...
Page 104: ...NX25 NX15 Troubleshooting Manual Parts Lists Page 3 8 Issue 5 0 2016 05 06...
Page 216: ...NX25 NX15 Troubleshooting Manual Wiring connector lists Page 4 12 Issue 5 0 2016 05 06...
Page 222: ...NX25 NX15 Troubleshooting Manual Reading Electrical Schematics Page 5 6 Issue 5 0 2016 05 06...
Page 250: ...Issue 5 0 2016 05 06 MD 1 Figure MD 1 NX15 NX25 Transmitter Front View...
Page 251: ...Issue 5 0 2016 05 06 MD 2 Figure MD 2 NX15 NX25 Transmitter Rear View...
Page 254: ...Issue 5 0 2016 05 06 MD 5 Figure MD 5 NAE96C 01 Control Exciter Panel...
Page 257: ...Issue 5 0 2016 05 06 MD 8 Figure MD 8 NAPI106 Remote Interface PWB...
Page 261: ...Issue 5 0 2016 05 06 MD 12 Figure MD 12 NAPI98 RF Drive Distribution PWB...
Page 263: ...Issue 5 0 2016 05 06 MD 14 Figure MD 14 NAX243A B Distribution Assembly...
Page 265: ...Issue 5 0 2016 05 06 MD 16 Figure MD 16 NAPA34A Modulator Power Amplifier PWB Front View...
Page 267: ...Issue 5 0 2016 05 06 MD 18 Figure MD 18 Fan Tray Assembly 207 8133...
Page 268: ...Issue 5 0 2016 05 06 MD 19 Figure MD 19 Voltage Probe 207 6111...
Page 269: ...Issue 5 0 2016 05 06 MD 20 Figure MD 20 Current Probe 207 6213 04...
Page 270: ...Issue 5 0 2016 05 06 MD 21 Figure MD 21 NAFP106B 02 Directional Coupler A1 DETAIL...
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