[ICOM] ICOM IC-2100 vs 2100H

[GGLL]

	So it could be "the intermittent switch" instead.

Or either Q26, Q27 or Q35 (Main Unit).

You should have a "1" logic state at Q35 base when rig is powered on.

Regards
Guillermo - LU5WE.

El 17/09/14 a las 22:44, D C _Mac_ Macdonald escibió:
> Thank you, Guillermo!
>
> I don't know why I didn't think of that!  I just checked the
> protection diode as you suggested.  It reads about .51 Volts  on the
> diode check function of my Fluke 77 digital multimeter.
>
> It would appear that the troubles are much more minimal than I had
> feared.  As I have previously posted, I have an actual Icom Service
> Manual that should arrive by the middle of next week.
>
> * * * * * * * * * * * * 73 - Mac, K2GKK/5 * * (Since 30 Nov 53) * *
> k2gkk hotmail com * * Oklahoma City, OK * * USAF & FAA (Ret.) * * * *
> * * * * * * * *
>
>
>
>> Date: Wed, 17 Sep 2014 22:28:44 -0300 From:
>> nagato at madryndigital.com.ar To: icom at mailman.qth.net Subject: Re:
>> [ICOM] ICOM IC-2100 vs 2100H
>>
>> Ok, it could be so; nevertheless, if you reverse probe leads, it
>> "should" measure (protection) diode voltage threshold, when
>> everything is still ok.
>>
>> Regards Guillermo - LU5WE.
>>
>>
>> El 17/09/14 a las 10:58, D C _Mac_ Macdonald escibió:
>>> Well, I don't have a service manual YET, but I did score one on
>>> eBay about 15 minutes ago. It should arrive here in about a
>>> week.
>>>
>>> I guess I'll go from there!
>>>
>>> There is NO continuity between the plus lead and chassis, so I
>>> expect that either the main trace may be fried or worse damage
>>> has occurred.
>>>
>>> Thanks again, everyone who provided info.
>>>
>>> 73 - Mac, K2GKK/5 > >
>>>
>>>> To: icom at mailman.qth.net Date: Wed, 17 Sep 2014 08:47:40 -0400
>>>> From: ma.locksmith at juno.com Subject: Re: [ICOM] ICOM IC-2100
>>>> vs 2100H
>>>>
>>>> Now that you have the service manual, you can see there IS a
>>>> diode, and it's on the board.
>>>>
>>>> If the input is not shorted, is it open?  If you measure the
>>>> diode on the board, is it open, shorted, or good?
>>>>
>>>> Ed K1ZOK
>>>>
>>>> On Tue, 16 Sep 2014 13:34:58 -0500 D C _Mac_ Macdonald
>>>> <k2gkk at hotmail.com> writes:
>>>>> I don't know if Icom had included a reverse protection
>>>>> diode. The input line is NOT shorted but I really suspect
>>>>> that reverse polarity was applied WITHOUT a fused line.
>>>>>
>>>>> I guess the first thing to do is try to find a service
>>>>> manual for the radio.
>>>>>
>>>>> Thanks to those who have replied so far.
>>>>>
>>>>> * * * * * * * * * * * * > >>> 73 - Mac, K2GKK/5
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