From philabs!prls!mips!versatc!ames!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hpfcdc!hpldola!hp-lsd!col!billp Tue Apr 25 09:05:05 EDT 1989 
Article 11320 of rec.ham-radio: 
Path: philabs!prls!mips!versatc!ames!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hpfcdc!hpldola!hp-lsd!col!billp 
>From: billp@col.hp.com (Bill Pherigo) 
Newsgroups: rec.ham-radio 
Subject: ICOM 32AT MODS 
Message-ID: <4380043@col.hp.com> 
Date: 21 Apr 89 18:54:19 GMT 
Organization: HP Colorado Springs Division 
Lines: 34 
 
 
                    MODS FOR ICOM 32AT 
 
1.  Remove battery and antenna. 
2.  Loosen two screws on top of unit as much as possible without removing them. 
3.  Loosen 4 flat head screws on bottom of unit 1 turn. 
4.  Loosen 2 screws near PTT switch 1 turn. 
5.  Remove 4 black screws on back of unit.  
6.  Lift bottom of front cover .25 inch, slide it down .25 inch, then lift 
    front cover up 1 inch. 
7.  Disconnect plug on 4 wires coming from the speaker.  
8.  Lay front panel on table up-side down being careful of the flex circuit. 
9.  All mods are done to the back of the front panel.  Notice places for 5 
    axial diodes, which I will call 1 through 5, 1 being nearest the display. 
    Add/remove diodes so there are diodes in positions 3 and 5.  This will 
    open up receive coverage for VHF & UHF and enable keyboard entry of the  
    10 MHz digit. 
10. Notice 4 surface mount resistors slightly left of center directly above the  
    speaker, lined up in a row.  Solder the anode (the side without the bar) 
    of two diodes to the right side of the lower of the four caps. Now find 
    the CPU.  It's the PGA under the shield near the top of the board.  Find 
    the row of pins on the CPU nearest the speaker.  Notice the the 8th pin 
    from the right has a thicker trace coming from it.  Now notice that there 
    are small solder pads about .25 inch toward the speaker on both the fat 
    trace and the two traces to the right of it.  Solder one each of the 
    cathodes of the 2 diodes to the solder pads on the two smaller traces. 
    This will open up the transmit for VHF & UHF. 
11. Put unit back together in reverse order. 
 
     This procedure worked for my unit (and many others), but I can't 
 guarantee it will work for yours. 
 
Bill Pherigo 
WR0Y 
 
 
 
 
