tektronix ths720 schematic needed

[ivcho_gd]

Hello, I have a problem with ch2 of tektronix ths720 scope.
It suddenly stop working and indicate input.
do you have any suggestions for troubleshooting or schematic to check.
Thank you!

[tester272001]

Re: tektronix ths720 schematic needed

service manual here:
https://www.tek.com/en/oscilloscope/...service-manual

[ivcho_gd]

Re: tektronix ths720 schematic needed

Thank you! I also found it but I need board schematic.

[stj]

Re: tektronix ths720 schematic needed

the trace works so it's in the analog rectfier/divider area.
why not use the working channel to follow the signal through the bad channel till you lose it?
does switching ranges or going between AC and DC have any effect?

[ivcho_gd]

Re: tektronix ths720 schematic needed

Thank you, I'll check and give feedback.