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[Yaesu] FT990 fan

To: yaesu@contesting.com
Subject: [Yaesu] FT990 fan
From: john lee <kt6e@yahoo.com>
Date: Mon, 10 Apr 2006 13:38:12 -0700 (PDT)
List-post: <mailto:yaesu@contesting.com>
I recently picked up an FT990 which seems to have a permanently closed  (always 
on) cooling fan circuit. The fan also seems quite noisey. I  need to 
trouble-shoot the thermistor, op-amp and transistor in the  cooling circuit on 
the PA board. Also consider replacing the noisey  fan. Any info/advice would be 
  Tnx,  --  John
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