NV5LT/NV3.5LT TROUBLESHOOTING MANUAL
RESPONDING TO ALARMS
VERSION 3.3 2016-03-10
PAGE 4.1.45
Module Cooling Fan Replacement
.
1.
Remove the RF power module’s right-hand side cover by removing 11 M3 countersunk screws.
Retain hardware for re-installation.
2.
Disconnect the suspect cooling fan’s mating plug (B1P1 through B6P1). Cut the tyrap that secures
the fan wiring to the splitter PWB.
3.
Remove and retain the cooling fan’s two M3 captive screws that secure the fan to the module.
4.
Obtain a replacement fan (Nautel Part # ZAP50) from the site spares kit or station spares kit or
from a suitable equivalent (vendor part # is Minebea Motor Mfg. Corp. 3115RL-07W-B79-E51).
5.
Install the replacement fan using retained screws. Torque hardware to 1.0 inch-pounds only to
avoid cracking the fan’s body. Twist the fan’s mating plug three times (reduces RFI) and reconnect
it to the splitter PWB. Secure the wiring using a tyrap (Nautel Part # HT66) from the ancillary kit.
6.
Re-install the right-hand side cover using retained hardware.
7.
Return the RF power module to the transmitter (see
“Installing an RF Power Module” on
).
Figure 4.1.13: Replacing a Power Module Cooling Fan
COOLING FANS
B1 - B6
(B1 removed)
B1
B2
B3
B4
B5
B6
RIGHT-HAND
SIDE COVER
Содержание NV3.5LT
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Страница 294: ...VERSION 3 3 2016 03 10 SD 32 Figure SD 32 NAFP109B Output Power Probe and Sample PWBs ...
Страница 307: ...VERSION 3 3 2016 03 10 MD 8 Figure MD 8 NAPA31C Power Amplifier PWB Q1 ...
Страница 316: ...VERSION 3 3 2016 03 10 MD 17 Figure MD 17 NAL14 1 Input Reject Load Assembly L2 1 INPUT REJECT PWB TOP VIEW END VIEW ...
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