Re: Hameg HM307-3 Cleaning and Repair
With that end of R363 grounded, nothing will change with the position of the buttons because we have fixed the state input state to 0v. There seems to be no effect regardless of whether there is a voltage present at the input of R363 or not. Since you have tried substituting the transistors and confirmed that the diode is OK, I think we must be looking at a faulty OC. You mentioned you might have a spare so I suggest you try replacing it it.
Last edited by WaveyDipole; 12th Jun 2019 at 4:16 pm.
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