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looking for philips pm3070 operating manual

Is the PM 3055 close enough??
It looks to be the same series

This site has the service manual, it covers PM3070 and PM3072:

thanks , I guess it is something internal - ch a and b are always linked together on the same trace -- they are either added or if I hit inv they are subtracted -- I cannot get them on there own trace --? thanks again for the helps and manuals