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Electronics => Repair => Topic started by: Hellfish69 on December 26, 2021, 12:09:50 pm

Title: Fluke PM 3394A self calibration
Post by: Hellfish69 on December 26, 2021, 12:09:50 pm

Hello,

i have scored a Fluke PM 3394A 200Mhz Scope. The Scope works fine. Self test ok analog mode works but in digital mode the scope has some issues.
Channel 1 and 3 have a big offset. The self cal runs but is ends with a incomplete massage. What can i do to fix this problem with the offset?
I removed the backup batteries (leaking) perhaps that causes the problem.


Lg Mike

Title: Re: Fluke PM 3394A self calibration
Post by: HighVoltage on December 27, 2021, 03:31:45 pm

It has nothing to do with the backup batteries, they are only for RTC and memory of stored pictures and setups

Your problem is a hybrid chip that was originally manufactured by Philips and is now unobtanium.
The 4 Channel scopes have two of these chips, one for CH1,CH3 and the other one for CH2,CH4