[Icom] re defective PS-35 switching ps

Wed, 05 Mar 2003 08:25:46 -0800

My IC-765 started acting somewhat as you describe but it was doing it=20
constantly. The Icom web-site directed me to resolder he current sense=20
resistor - it's actually a bar. It took quite a bit of work to get to it=20
but after all the effort, the problem was fixed.

73 - Larry W=D8NFU
[email protected]

At 05:05 AM 3/5/2003 -0500, you wrote:
>"usually"is vague, but many times the series-pass regulator transistors
>go bad from excessive load cirrent. These are probably two large
>BJT's mounted on a heat sink. They are in series with the load current.
>A schematic would help you a lot. Sounds like one is good and one
>is bad from you description of trouble.
>
>Larry,  K4WLS
>
>
>----- Original Message -----
>From: "Fern Rivard" <[email protected]>
>To: <[email protected]>
>Sent: Wednesday, March 05, 2003 1:34 AM
>Subject: [Icom] re defective PS-35 switching ps
>
>
>I have a friends IC-745 which has a bad PS-35 power supply in it as it
>crashes under load when loading to more than say 30 or 40 watts!  What
>normally goes bad in these switching type of power supplies?  73 from Fern
>
>PS The radio works fb on my external power supply.
>
>----
>Your Moderator: Dick Flanagan W6OLD, [email protected]
>Icom Users Net: Sundays, 1700Z, 14.315 MHz
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>
>----
>Your Moderator: Dick Flanagan W6OLD, [email protected]
>Icom Users Net: Sundays, 1700Z, 14.315 MHz
>Icom FAQ: http://www.qsl.net/icom/