Yaesu FT-26, Техническое дополнение

Страница: 17 / 59

Alignment
The Fr-26 has been carefully aligned at the fac­
tory for the specified performance across the ama­
teur band. Realignment should therefore not be
necessary except in the event of a component fail­
ure. Sets under warranty should be serviceed only
by authorized Yaesu representatives, or the war­
ranty policy may be voided.
The following procedures cover the sometimes
critical and tedious adjustments not normally re­
quired once the transceiver has left the factory.
However, if damage occurs and some parts sub­
sequently be replaced, realignment might be re­
quired.
If
a sudden problem occurs during normal
operation, it is likely 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 alignment. Therefore, if a
fault is suspected, contact the dealer from whom
the transceiver was purchased for instructions re­
garding repair. Authorized Yaesu service techni­
cians realign all circuits and make complete
performance checks to ensure compliance with fac­
tory specifications after replacing any faulty com­
ponents.
Those who do undertake any of the following
alignments are cautioned to proceed at their own
risk. Problems caused by unauthorized attempts at
realignment are not covered by the warranty pol­
icy. Also, Yaesu must reserve the right to change
circuits and alignment procedures in the interest of
improved performance, without notifying owners.
Under no circumstances should any alignment
be attempted unless the normal function and op­
eration of the transceiver are clearly understood,
the cause of the malfunction has been clearly pin­
pointed and any faulty components replaced, and
the need for realignment determined to be abso­
lutely necessary.
The following test equipment (and thorough
familiarity with its correct use) is necessary for
complete realignment. Correction of problems
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 equipment listed, the interactions of some
Circuit Board Locations
PLL UNIT
CLOCK UNIT
IF UNIT
4-1 FT-26 Technical Supplement