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IC32AT.18
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1990-10-14
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Model: IC-32AT
Division: Amateur
Note: This service bulletin is meant for technical per-
sonnel with experience working on solid state com-
munications equipment. Damage caused by im-
properly installing this modification may cause
ICOM to charge for subsequent repairs to the
product. ICOM does not warrant this modification.
Bulletin #: 13889-004
Date: May 1, 1989
Subject: Elimination of possible faint pulse noise from
speaker when radio is in power save mode
Information: The power save mode employs a circuit which
creates a high level square wave signal used in
the power save function. This modification alters
the square wave characteristic to eliminate the
noise.
Procedure
1. Remove the covers from the radio and locate the main board.
2. Locate C-749 and replace it with a 2.2 uf 16 V tantalum chip
capacitor.
3. Reassemble the radio, power up and allow the unit to enter
the power save mode.
4. Check to see that the pulse type noise has been eliminated.
5. Replace the covers and return the radio to service.
Bulletin #: 13889-005
Date: May 1, 1989
Subject: Enable IC-32AT cross band repeater function
Procedure
1. Disassemble the radio so the logic board is able to be
worked on.
2. Cut a lead on D912 or remove it from the board.
3. Reassemble the radio.
Operation
To enable cross band repeat hold the function switch
depressed and then depress the C, 6, and D keys in that or-
der. Release the function button.
To disable the cross band repeat function hold the function
button depressed and then depress the D and C keys. Release
the function button.