[ICOM] IC-735 Intermittent Problem ??

[Bruce]

You have a bad trimmer cap in the PLL VCO section for that band of frequencies.
I recommend you get a service manual for this radio before you start 
tearing into
it. You will need to replace all 4 trimmer caps (If they haven't 
already) with  ceramic
types.
Bruce W7BCW
At 05:59 AM 11/26/2006, you wrote:
>Hello Gang:
>
>I am trying to troubleshoot my IC-735 that has a problem I am trying to
>troubleshoot.  However I don't have a schematic or service manual so
>it's difficult to try to track down the source of the problem.  I am wondering
>if someone on this Reflector has experienced a similar problem and perhaps
>can save me some hair pulling and gnashing of teeth trying to figure it out.
>
>The radio's functions all work perfectly below 15 MHz and above 22 MHz.
>However both the RX and TX are dead only from 15MHz to 22 MHz.  This
>is intermittent and sometimes both TX and RX functions are normal.  I
>cannot see anything that causes this to happen, ie: switches, VFO, change
>from RX to TX, etc. It just comes and goes without apparent reason.
>
>Obviously there are some circuits that are common only to this range of
>frequencies only and I am figuring it logically must lie somewhere within that
>common circuitry.  However without documentation it will be hard to track this
>down.
>
>Can anyone offer any suggestions or information that might help me fix this
>annoying problem?
>
>73,
>
>Michael, W1RC
>
>W1RC*at*verizon*dot*net
>
>
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