Alignment; Vco Unit; Main Unit - Yaesu FT-2400H Technical Supplement

The Ff-2400H has been carefully aligned at the
factory for the specified performance across the
amateur band. Realignment should therefore not
be necessary except in the event of a component
failure. All component replacement and service
should be performed only by an authorized Yaesu
representative, or the warranty policy may be
voided.
The following procedures cover the sometimes
critical and tedious adjustments that are not nor­
mally required once the transceiver has left the
factory. However, if damage occurs and some parts
subsequently be replaced, realignment may be re­
quired. If a sudden problem occurs during normal
is
operation, it 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
D Make sure t he transceiver is off. Loosen the
screws on the heatsink and remove the top and
bottom covers. The Control Unit is now accessi­
ble on the top of the chassis.
D In
the bottom of the set, remove the 5 screws
from the shield cover, and remove the shield to
gain access to the Main Unit.

ALIGNMENT

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
Case Disassembl y
INTERFACE UN IT

MAIN UNIT

VCO UNIT

CNTL UNIT
MIC UNIT