Checkout in IC-751/IC-751A
When you first power on the transceiver, the display may read an unusual frequency
like “666.667.8”. This is normal after the initial powering up of the system. You must
initialize the RAM settings as follows:
1.
Set the HAM / GEN purpose function to the HAM mode as indicated by the red
GENE message in the bottom left corner of the display being EXTINGUISHED.
That is, you shouldn’t see the GENE message.
2.
Select a band by pressing the Band button and rotating the tuning knob.
3.
Select a mode, USB, AM, LSB, your choice.
4.
Set the VFO B info to that of VFO A by pressing the A=B button.
5.
Preset the 32 memory channels in the normal fashion. If you haven’t set a
particular memory channels data, but try to recall it, the display may show an
improper frequency or mode.
Installation in R-71A
1.
Record any important memory information that you want to retain from your old
memory module. Since you are replacing the transceivers RAM, this information
will be lost when the new board is installed.
2.
Disconnect the power cord from your receiver!!
3.
Remove the bottom cover of the receiver.
4.
Remove the mounting plate covering the Logic board, there are four screws
securing it.
5.
Locate the old Icom RAM board, it is ~ 2 inch square board with the coin cell
mounted on it.
6.
The old ram board is held in place with a small Phillips screw in one corner of the
board. Remove this screw and unplug the old RAM board.
7.
You can increase the clearance between the ICOMPROM board and the mounting
plate, removed in step 3, by trimming the logic boards RAM connector pins (the 8
and the 12 pin connectors) by about 1/8”. This modification isn’t 100% necessary,
but it is a good idea.
8.
Carefully align the new board with the connection pins protruding from the Icom
logic board. There are 2 connectors which need to line up, a 12 pin and an 8 pin.
Be careful to be certain that all of the pins are aligned with the mating receptacle
on the PIEXX ICOMPROM board and then press the board down onto the pins.
9.
The Logic board cover plate has an insulating material glued to its bottom.
Make
sure that the insulating material is in good condition, and replace it if not.
This insulation prevents the battery on the IcomPROM board from shorting to the
cover plate.
10.
Replace the Logic board cover plate and the bottom cover on the radio.
Checkout in R71A
1.
When you first power on the receiver, the display may read an unusual frequency
like “666.667.8”. This is normal after the initial powering up of the system. You
must initialize the RAM settings as follows:
