problem with tuning GC MS HES

we have GCMS HES after replace with new filament block and cleaning the ion source we found different results of tune file with filament one and tow although both are new

 the tune pass with filament one and the tune evaluation is good but on changing to filament two we found the tune is very bad (not passed) , the gases ratio increased ,the isotope 70 

is missed and the peak width increased .

any help to this problem is  appreciated

thank you all

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