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ic_r71.txt
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1990-10-14
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Model: IC-R71
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 #: R71110884-130
Date: November 9, 1984
Subject: Improve the S-meter sensitivity after warm up
Procedure
1. Replace R114 (470 ohm) with a 680 ohm resistor.
2. Add R207 3.3K resistor from the anode of D70 to the emitter
of Q23.
3. Add R208 a 33D28 thermister (ICOM P/N 915-04228) in parallel
with R114.