IFR COM120C -Unlocked Analyzer and Gen

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try2fix
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Posts: 5
Joined: Mon Jun 17, 2019 10:43 am

IFR COM120C -Unlocked Analyzer and Gen

Post by try2fix »

IFR COM120C running fine till other day it got a little warm and now it shows -.01 deg celsius in set up Diagnostics Batt & Temp Screen--Also the Analyzer and Generator in the Synthesizers Lock Test are unlocked. I opened up the unit and Generator Mech Assy and the Synthesizers Mech Assy cards are showing the unlock red led on.
I went threw the power supply checking the caps and all seem to test fine......any help to know where to look for the trouble would be great - can't seem to find any service secmatics info on this unit.
Thanks
jry
Posts: 448
Joined: Fri Feb 06, 2004 3:14 pm

Re: IFR COM120C -Unlocked Analyzer and Gen

Post by jry »

Well it sounds like your baseband card may have issues if the temp is off.

Look at and the diagnostics and see what is failing.

If both of those showing as unlocked than you may not have made it through the initialization of the unit.

Either that or one of the reference signals is gone ...check the outputs of the reference module since both the Baseband and synthesizers use those outputs ....you can try an external reference for grins as well if the main 10Mhz died.
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