DI SPLAY UNIT
MAIN UNIT
TRANSMITTER
SECTION
MAIN UNIT
RECEIVER
SECTION
RED WIRE MUST BE CUT
WHEN TONE SQUELCH UNIT
IS INSTALLED.
TONE SQUELCH UNIT
( WHEN INSTALLED)
TONE BURST
SECTION
PLL CONTROL UNIT
CHANNEL SELECTOR
PHOTO INTERRUPTER
UNIT
P/J,
o
,
P/J
3 02
P/J
30
,
PLL LOCAL
SECTION
MODULATOR
SECTION
CONVERTER,
PLL SECTION
VCO SECTION
P/J,â
P/J,o,
MAINTENANCE & ALIGNMENT
GENERAL
The modelFT-227RBtransceiver has been carefully
aligned and tested at the factory prior to ship-
ment. The reliability of the solid-state devices used
in the FT-227RB should provide years of trouble
free service if the transceiver is not abused and
normal, routine maintenance is carried out.
THE FOLLOWING PRECAUTIONS SHOULD
BE OBSERVED TO PREVENT DAMAGE TO
THE TRANSCEIVER.
(1)
Do not exceed 14 Volts DC, at the POWER
receptacle.
When operating mobile, check the battery
voltage under the load (transmitter "keyed"
in FM mode) with the engine running fast
enough so the ammeter shows a "charge".
In addition, do not operate the FT-227RB if
the supply voltage is below 12 Volts DC.
(2)
Avoid direct exposure to sunshine or water.
ROUTINE MAINTENANCE
Routine maintenance should be limited to keeping
the transceiver clean, and periodic performance
checks of the transmitter RF power output and the
receiver sensitivity.
Cleaning:
When the transceiver has been used in dusty or
sandy areas, the interior should be periodically
cleaned. A vacuum cleaner should be used, while
any caked or accumulated dirt may be removed
with a soft brush. Check the interior to make sure
that it is thoroughly dry before replacing the case
and/or operating equipment. Wipe the exterior
with a damp cloth whenever required.
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