Section Viii - Ac Power Supply Wiring - Icom IC-21 Instructions Manual

4. Тһе multipliers, driver and power output stages should be aligned on Low power
first, then set the Hi-Low Power switch to High power. Align these stages according
to the alignment chart provided. Be careful not to transmit for more than 5 seconds
during each alignment step, as damage could be caused to the transistors due to
overload during this procedure. Another IC-21 or IC-20, with discriminator meter
wired in, can be used during this procedure, as the measuring equipment.
3. | Receiver Alignment:
6; Connect the test oscillator or generator to the antenna coax connector. Set the test
oscillator or generator to the desired frequency, and tune the RIT Control (#5,
Fig. 2) for a 'O' reading on the Discriminator Meter (#9, Fig. 2). Set the Squelch
Control (#3, Fgi.2) to the maximum counter-clockwise position, before the
"click".
d. Align the receiver according to the chart provided (Chart #1).
e. When setting the receiver to a desired frequency the discriminator meter should be
monitored and the receiver trimmer capacitors adjusted to cause the S meter to read
à maximum and the discriminator meter to read '0'. Refer to Figure 3 for the
location of the proper trimmer corresponding to the channel to be used. Adjsut
these trimmers very slowly while observing the Discriminator Meter. Another IC-21,
or a ІС-20, with discriminator meter installed, operating on the desired frequency,
can be used for this purpose, also.
SECTION VIII — AC POWER SUPPLY WIRING
117 100 0 117 100 0
117 0 117 1
То fuse holder 199 go 9
To terminal strip
117 100 0 1177 100 0
То fuse hol
117 100 0 117 100 0
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