Here's the info I posted on this issue. This is for the r75. the 818 uses
the same board:
DISCLAIMER: The author is not responsible for any
damage resulting from this procedure.
1. Abstract:
The following procedure alters the volume on the
optional UT-102 voice synthesizer.
2. Methods:
Turn the receiver off and remove the six case screws.
Using a plastic screwdriver adjust R1254 (see red
below). Replace the six case screws. Notice the M5282
amplifier (yellow) and R1254 resistor (red) in the
block, schematic, and picture.
WARNING: Only use a plastic screwdriver and DO NOT
drop screws into the unit.
----- Original Message -----
From: "Steve" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 17, 2010 2:19 PM
Subject: Re: ic-718
> On my older Icom 751 which uses the same UT-102, there is a pot adjustment
> on the synthesizer board.
>
> ----- Original Message -----
> From: "Butch Bussen" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, March 17, 2010 2:08 PM
> Subject: Re: ic-718
>
>
>> Are you sure? I spoke with icom and a e s and both tell me there is no
>> adjustment on the board. I'm confused, and the speach board is mounted
>> under the add on digital noise reduction module, so not easy to get at
>> unless I'm sure.
>> 73
>> Butch Bussen
>> wa0vjr
>> open Node 3148
>> Las Vegas
>>
>>
>> On Wed, 17 Mar 2010, Russ Kiehne wrote:
>>
>>> The adjustment is on the speech board itself.
>>> ----- Original Message -----
>>> From: "tom behler" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Tuesday, March 16, 2010 5:55 PM
>>> Subject: Re: ic-718
>>>
>>>
>>>> Butch:
>>>>
>>>> I swear there is an adjustment in one of the menus for UT102 volume.
>>>>
>>>> I seem to recall having that problem with mine too, but remember
>>>> adjusting
>>>> it. I had to, because it was a rig that I used for Field Day, and
>>>> often
>>>> in
>>>> our motor home, so needed the volume to be a bit higher than usual.
>>>>
>>>> 73 from Tom Behler: KB8TYJ
>>>>
>>>> ----- Original Message -----
>>>> From: "Butch Bussen" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Tuesday, March 16, 2010 5:54 PM
>>>> Subject: Re: ic-718
>>>>
>>>>
>>>> I did go to a e s and bought the synthesizer and the i-100 tuner. I
>>>> considred getting the at-100, but they didn't have one in stock and I
>>>> wasn't sure what the up down manual tuning buttons did and all that, so
>>>> I
>>>> figured I'd keep it simple, just one button. On another note, the
>>>> synthesizer works, but the level seems low. It is fine if you don't
>>>> have
>>>> much signal, but it is covered up by the noise unless I turn the rf
>>>> gain
>>>> down. Any suggestions? I called a e s and they said no level adjust
>>>> on
>>>> the board. I called icom and they are supposed to call me back.
>>>>
>>>> Yep, it is a nice little radio, nice for portable or mobile, just a
>>>> simple
>>>> little rig.
>>>> 73
>>>> Butch Bussen
>>>> wa0vjr
>>>> open Node 3148
>>>> Las Vegas
>>>
>>>
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