Hi, I have an oscilloscope trio 10mhz cs-1562a. its problem was that the az had very wide and did not regulate anything, I discovered a resistance, of 2.2M, 2W, open and the system but now does not leave nor the az.this instrument spent a long time without functioning. The resistance belonged to a quatrain in series attached to pot of focus adjustment. Anyone with any ideas please? thank you

Hi, sr.claudiogol.su recommendation is excellent, because it really takes me to the exact place where you can prodicirse this fault but I apologize porq not really already solved the problem, since when they change the resitor to which I referred when I made my request help, what happened was q when starting to put all the switches in initial position of work forget to place the level control in pull auto and did not see the stroke. really grateful of you and as I can not ask another question in is point as I will formulate another in the appropriate forum and on another problem that I still have with my oscilloscope.