From philabs!prls!pyramid!amdcad!ames!apple!sun-barr!decwrl!shlump.nac.dec.com!larkan.dec.com Wed Aug  2 09:13:15 EDT 1989
Article 13112 of rec.ham-radio:
Path: philabs!prls!pyramid!amdcad!ames!apple!sun-barr!decwrl!shlump.nac.dec.com!larkan.dec.com
>From: kral@larkan.dec.com (Larry N0AMP)
Newsgroups: rec.ham-radio
Subject: IC-32AT Modifications (Expanded UHF Coverage)
Message-ID: <3894@shlump.nac.dec.com>
Date: 1 Aug 89 11:13:21 GMT
Sender: news@shlump.nac.dec.com
Organization: Digital Equipment Corporation
Lines: 89


         Originally prepared by N0ION, modified by N0AMP.

   |                      This is a view of the interior (front side) after 
   |                      the front of the case has been removed (4 screws 
  / \                     in back, 2 screws near PTT switch loosened only).
  | |   +-+  +--+
  | |   | |  |  |         Carefully disconnect speaker/mike cable from PC
+------------------+      board to allow front cover to be fully opened.
|       TOP        |
|                  |      NOTE: Battery should be disconnected.  Use ESD
|                  |      protection (grounded wrist strap, etc.).
|                  |
|                  |
|                  |
|                  |
|                  |
|                  |
|                  |
|                  |
|              +-+ |
|              | | | 5 positions on PC board
|              | | | for diodes (see below for
|  BOTTOM      +-+ | details)
+------------------+
|                  |
|                  |
|     BATTERY      |
|                  |
|                  |
+------------------+




This shows diodes as installed at the factory.

           TOP

    +--+          +--+
    |  |          |  |  D907
    +--+          +--+

    +--+   | /|   +--+
    |  |---|< |---|  |  D913  Removing this diode results in expanded UHF
    +--+   | \|   +--+        coverage.  Coverage is from about 430-460 Mhz.

    +--+          +--+
    |  |          |  |  D908
    +--+          +--+

    +--+   | /|   +--+  
    |  |---|< |---|  |  D912  Removing this diode results in enabling
    +--+   | \|   +--+        the unit as a cross-band repeater.

    +--+          +--+
    |  |          |  |  D???  Installing diode here (same direction as others) 
    +--+          +--+        permits direct entry entry of the 10Mhz digit.

         BOTTOM

   Icom Service Bulletin #13889-005

   The IC-32AT has the capability of being used as a cross-band repeater.
   This function is not enabled as the unit is shipped from the factory.

   To enable this function perform the following steps:

   1- Cut D912 on LOGIC UNIT. (see above figure)

   2- Push and hold the (FUNCTION) switch.

   3- Push the (C) key.

   4- Push the (6) key.

   5- Push the (D) key.

   6- Release the (FUNCTION) switch.

   To cancel "MINI REPEATER" perform the following steps:

   1- Push and hold the (FUNCTION) switch.

   2- Push the (D) key.

   3- Push the (C) key.

   4- Release the (FUNCTION) switch.