[ICOM] IC-2AT diode matrix question

[Jack/AE7DX]

(Reposting with the correct model number indicated)


I have been given an IC-02AT HT for my son, who recently 
passed his Tech exam and is waiting for the license to be 
issued. This HT has been slightly modified by someone who, I 
believe, was trying to change the frequency coverage so got 
into the diode matrix. The PC board where the diode pairs 
were mounted has been damaged and the surface mount diodes
can no longer be mounted in their original locations. My 
question is this:

What is the proper diode matrix configuration for stock 
2-meter operation? The manual copy which I have shows two 
identical 4-diode diagrams for IC-02A/AT (AU/AE) and IC-02AT 
(SA/SAT) utilizing half of D-2 and D-3 and both sections of 
D-7 (marked D-402, 403 and 407 on the diagram). Are these 4 
diodes all that are required to make the rig work?
The schematic is not clear on this matter and it appears 
that there were more than just 3 diode pairs mounted on the 
PC board. The only diodes mounted on the board presently are 
the original D-407 pair which check good with a DMM.

Any assistance would be appreciated.

Thanks and 73,

Jack, AE7DX