[Icom] Ic-2100H power out failure

Mon, 02 Dec 2002 09:16:38 -0600

At 07:44 AM 12/2/02, you wrote:
>Roger,
>
>   Yes, the IC-2100H is known for final module failures. Icom used a final
>..........................d-up" during RF module failure. I confirmed this 
>by checking the
>voltage at the pin 2 PC board pad during transmit with the RF module lead
>disconnected from the module when the radio was operating correctly -- the
>voltage was very close to 12.5v confirming that something is opening-up at
>pin 2 inside the RF module.
>
>   If the switching transistor was failing, I would have expected to see near
>0v during transmit at pin 2 of the RF module. According to some emails I've
>received, the TO-220 switching transistor is on the bottom of the board near
>the RF module (I couldn't see it from the top of the board).
>
>   Last time I checked, the RF module costed $55 plus $7.50 S/H (RF Parts).
>Also, the cover comes off of the RF module relatively easily, I know a
>friend who found a crack in one of the traces in an intermittent module and
>simply flowed solder over the crack -- it works for now! Also, in regards to
>seeing nearly 80 watts out of the radio, perhaps the previous owner had
>cranked-up the drive level on the high power setting (not a good idea on one
>of these radios)...

..............................  had the same problem with my icom 2710,.,,,

there was a crack in the ceramic backplane.. which caused a small crack in 
the 12 vt line to the module,,,,
I could not find the crack in the ceramic till i found the crack in the 
solder ...that crack was visible,,, then i could see the ceramic crack.
Got out the silver solder,,, now it works fine and I'll keep the module i 
ordered for  a spare ( I have  a 2700n & another 2710)...
Icom put their name on that module , and they charge for those failures...
seems that should make toshiba eat them)...
  ( i don't suppose ICOM would fix those modules,,,like us hams...)
bil

>    73, Michael N9BDF
>
>====================================
>Message: 17
>From: "Roger Peterson" <[email protected]>
>To: "icom" <[email protected]>
>Date: Sat, 30 Nov 2002 19:46:01 -0500
>Subject: [Icom] Ic-2100H
>Reply-To: [email protected]
>
>I aquired an Icom IC-2100H and the finals I believe fried. My question is:
>Is this an a problem with these radios or is it that mine had a weak final.
>It is an almost new rig. I was transmitting and the power supply was set at
>13.6 volts and it was drawing about the current it should have been. The
>only thing is it was showing 80 watts out. Thought that was a bit high.
>Checked my swr and it was well below a 2 to 1. When they blew it wasn't
>drawing excessive current.The power supply made a sort of grunting noise for
>2 or 3 transmissions and then the output dropped to driver output. Can
>anyone help me with this problem.
>
>Tnx es 73
>
>Pete Kc8qr
>
>
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