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9
CONNECTIONS AND MAINTENANCE
■ Optional unit installation
CAUTION: DISCONNECT the DC power cable from the
transceiver before performing any work on the transceiver.
Otherwise, there is danger of electric shock and/or equip-
ment damage.
Follow the case opening procedure shown here when you
want to install an optional unit.
q Remove the 12 screws as shown below and open the
transceiver.
w Plug an optional unit (UT-112) to J3 on the AF unit as
shown below.
e Assemble the units to their original positions.
CAUTION:
• When re-assembling the case and tightening the screws,
you must keep the specified torque (0.7 N.m). Otherwise
the transceiver may be damaged (torque too high) or lose
waterproof efficiency (torque too low).
• When unistalling the optional unit, remove it vertically.
Wiggling the unit from side to side may damage the op-
tional unit's connector.
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