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IC900.8
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1990-10-14
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Model: IC-900 REVISED 12- 7-89
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 #: 13889-016
Date: May 1, 1989
Subject: Occasionally at power up the LOGIC A unit will im-
properly initialize. The result is either a
dashed line or garbled numbers in the frequency
display.
Information: The following modification makes changes in the
CPU initialization time constants.
Procedure
1. Disassemble the radio unit and locate the main logic board.
2. Remove R100 a 100 ohm MCR10 and replace it with a 33K MCR10
(ICOM P/N 915-04793).
3. Remove R103 a 4.7K MCR10 and replace it with a 33K MCR10
(ICOM P/N 915-04793).
4. Reassemble the radio and test.