IFR 1200S bit the dust

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mogman
Posts: 127
Joined: Tue Aug 05, 2008 2:25 pm

IFR 1200S bit the dust

Post by mogman »

One of my beloved 1200S service monitors just bit the dust, I had noticed that I could not demod AM a while back but now it is totally gone wacko.
The processor seems fine, in that it boots up and I can enter frequencies, the frequency display seems to be working normal, but that is about where it ends, none of the controls above the freq. display get any reaction, mode,rec/gen,etc. the error meter never moves and the signal meter stays to the far right, the signal led is always dimly lit, the scope seems to be working as a scope but when it is switched to KC/DIV it illuminates above the top of the screen.
At first I figured easy fix, with this much dysfunction it had to be the power supply or something was pulling the supply down, a quick check on J1602 showed the -12V, +12V, 5V and 40V seemed to be fine so I am not sure where to go next.

A quick look through the manual reveled that whom ever wrote it and my brain waves do not whistle the same tune so I am going to have to get my head wrapped around it.
I had replaced the memory battery a couple years ago with a socketed setup that I have installed on several units, and may or may not have recapped this ones power supply in the past.
WB5ITT
Posts: 63
Joined: Thu Sep 01, 2005 8:09 am
What radios do you own?: Motorola, GE, Kenwood, Yaesu

Re: IFR 1200S bit the dust

Post by WB5ITT »

KG Electronics in Witchita KS is the place for 1200s....Kurt is a former IFR engineer who can repair those boxes...knows them like the back of his hand...
KGElectronics.com is his web site...tell him I sent you..

Chris Boone
WB5ITT
Chris WB5ITT
Trustee, W5APX
Beaumont, TX

Motorola, you may find better but you'll never pay more! 😉
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