Icom IC-22S PLL Synthesized 2-Meter Transceiver
Instruction Manual and Service Notes
6
The matrix board may be removed by taking out the hold-down screw at the end of the
board and pulling gently straight up on the other end to disconnect the matrix from the
connector. The numbers 1 through 22 indicate the channel number to be programmed and
the numbers D-0 through D-7 indicate the position in which the diode is to be placed
corresponding to the insert positions on the Frequency versus Matrix Chart. Insert the diode
into the line for the desired channel with the cathode pointing UP. The cathode lead is bent
down to go through the board to connect to the other side. After the diodes have been
inserted for the channel, turn the board over carefully so as to not have the diodes fall out
and solder each of the leads with a small tip, low wattage soldering iron. Clip end diode lead
off as close to the board as possible. Replace the board on its connector and replace the
screw in the end.
An external speaker jack and plug is supplied with your unit in the event another speaker is
desirable. The external speaker impedance should be 8 ohms. The use of the external
speaker jack will disable the internal speaker. An 8 ohm headset can be utilized as well.
(See Fig. 2B)
CAUTION: DO NOT USE A SOLDERING IRON OF MORE THAN 40 WATFS ON THE MATRIX
