Yaesu FTM-10R, Technical Supplement

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9
FTM-10R/E Technical Supplement
The FTM-10R/E has been carefully aligned at the fac-
tory for the specified performance across the 144 MHz
and 430 MHz amateur bands. Realignment should there-
fore not be necessary except in the event of a component
failure. All component replacement and service should
be performed only by an authorized Yaesu representa-
tive, or the warranty policy may be void.
The following procedures cover adjustments that are
not normally required once the transceiver has left the
factory. However, if damage occurs and some parts are
subsequently replaced, realignment may be required. If a
sudden problem occurs during normal operation, it is like-
ly due to component failure. Realignment should not be
done until after the faulty component has been replaced.
We recommend that servicing be performed only by
authorized Yaesu service technicians, who are experienced
with the circuitry and fully equipped for repair and align-
ment. Therefore, if a fault is suspected, contact the dealer
from whom the transceiver was purchased for instruc-
tions regarding repair. Authorized Yaesu service techni-
cians realign all circuits and make complete performance
checks to ensure compliance with factory specifications
after replacing any faulty components. Those who do
undertake any of the following alignments are cautioned
to proceed at their own risk. Problems caused by unau-
thorized attempts at realignment are not covered by the
warranty policy. Yaesu must reserve the right to change
circuits and alignment procedures in the interest of im-
proved performance, without notifying owners. Under no
circumstances should any alignment be attempted unless
the normal function and operation of the transceiver is
clearly understood, the cause of the malfunction has been
clearly pinpointed, any faulty components replaced, and
the need for realignment is determined to be absolutely
necessary.
Required Test Equipment
The following test equipment (and familiarity with its use)
is necessary for complete realignment. Correction of prob-
lems caused by misalignment resulting from use of im-
proper test equipment is not covered under the warranty
policy. While most steps do not require all of the equip-
ment listed, the interactions of some adjustments may
require that additional adjustments be performed. Do not
attempt to perform only a single step unless it is clearly
isolated electrically from all other steps. Have all test
equipment ready before beginning, and follow all of the
steps in a section in the order presented.

RF Signal Generator with calibrated output level at 500
MHz

Deviation Meter (linear detector)

AF Millivoltmeter

SINAD Meter

Inline Wattmeter with 5% accuracy at 500 MHz

Regulated DC Power Supply: adjustable from 10 to 17
VDC, 15A

50-ohm non-reactive Dummy Load: 100 W at 500 MHz

Frequency Counter: >0.1 ppm accuracy at 500 MHz

AF Signal Generator

DC Voltmeter: high impedance

VHF/UHF Sampling Coupler

AF Dummy Load: 4 W, 5 W

Oscilloscope

Spectrum Analyzer
Alignment Preparation & Precautions
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connected
to the main antenna jack in all procedures that call for
transmission, except where specified otherwise. Correct
alignment is not possible with an antenna. After complet-
ing one step, read the following step to determine wheth-
er the same test equipment will be required. If not, re-
move the test equipment (except dummy load and watt-
meter, if connected) before proceeding.
Correct alignment requires that the ambient temperature
of the transceiver be the same as that of the test equip-
ment, and that the temperature be held constant between
20° and 30° C (68° ~ 86° F). When the transceiver is brought
into the shop from hot or cold air it should be allowed
some time for thermal equalization with the environment
before alignment. If possible, alignments should be made
with oscillator shields and circuit boards firmly affixed
in place. The test equipment must be thoroughly warmed
up before beginning.
Note: Signal levels in dB referred to in this procedure are based
on 0 dB
μ = 0.5 μ V(closed circuit).
Alignment