I have an old analog multimeter (Chinese brand) that is capable of measuring current, voltage and resistance. I have not used it for a long time and only tried it recently. Measuring current and voltage still works fine, however measuring resistance only works if the scale is set to x1, x10 and x1k. If the scale is set to x10k (the highest resistance scale on this meter capable of measuring up to 2Mohm resistors), all resistors read as open circuit. Other resistance/voltage/current scales seem to work fine and the measured value is correct.
Any ideas what the problem is? I open it up, the fuse (which should not cause the problem) is still fine. The PCB is using five-band resistors with strange color code, some of them have faded with time. All connections seem secured and all resistors value seem reasonable.
Any ideas what the problem is? I open it up, the fuse (which should not cause the problem) is still fine. The PCB is using five-band resistors with strange color code, some of them have faded with time. All connections seem secured and all resistors value seem reasonable.
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