TMA2Q/LPC2Q Tower Mounted Amplifier Instruction Manual
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f.
You may but do not have to remove the two SMA-M/N-M adapters from the lightning arrestors. They
are finger-tight and no tools are required;
g.
Disconnect the grounding/bonding hardware on the enclosure by removing the 10-32 wing nut and
small flat washers, 10-32 standard hex nut, split lock washer and large flat washer from the outside of
the enclosure. Pull the 10-32 screw through the enclosure hole from the inside. This will free the
bonding leads connected to the lightning arrestors and chassis. Set aside all fastener hardware in a
safe place;
h. Remove the four screws from the chassis, one in each corner;
i.
Carefully lift the chassis top and simultaneously slide it out from the enclosure, rotating it to clear the
lightning arrestors. Do not disturb the bulkhead connectors or else the waterproof seals may be
broken. Handle the chassis carefully.
2. Re-Install internal chassis in TMA2Q Assembly
Re-installation of the chassis is a reverse of the removal procedures.
a.
Observe the color code used on all connectors and modules;
b. If the grounding/bonding lead was removed from the chassis, reinstall it;
c.
Place the chassis in the enclosure by simultaneously tilting and sliding it under the lightning arrestors
and into position in the enclosure so the four mounting holes line up with the embedded fasteners in
the enclosure;
d. Replace the four screws, one in corner of the chassis; tighten to 4~6 in-lb (0.45~0.68 N-m) torque;
e. If the SMA-M/N-M adapters were removed from the lightning arrestors, replace them. DO NOT use
any tools to tighten the N-connectors; tighten them finger-tight while holding the lightning arrestor.
Over-tightening these connectors may cause the lightning arrestor to rotate and break their seal;
f.
Reconnect the In port on the LNA modules to the SMA-M/N-M adapter; hold the LNA modules while
tightening the connectors so they cannot rotate; tighten to 3~5 in-lb (0.34~0.57 N-m) torque;
g.
Reconnect the SMA-M connectors to the LNA Out port; hold the LNA modules while tightening the
connectors so they cannot rotate; tighten to 3~5 in-lb (0.34~0.57 N-m) torque;
h. Reconnect the LNA power cable connector to the power supply module;
i.
Examine the power connections to ensure there are no broken wires;
j.
Reinstall the grounding/bonding hardware. Place the bonding leads under the 10-32 screw head
followed by one of the large flat washers. Push the 10-32 screw through the enclosure hole and place
the other large flat washer on the outside followed by a split lock washer and hex nut. Tighten these
fasteners to 20~27 in-lb (2.3~3.4 N-m) torque. Replace the small flat washers, split lock washer and
wing nut.
3. Remove chassis from LPC2Q Assembly
Caution
: Observe anti-static discharge practices at all times.
Tools: Phillips No. 2 screw-driver, 5/16 in or 8 mm torque wrench
