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Old 5th Dec 2020, 12:49 pm   #17
Join Date: Mar 2020
Location: Bodmin, Cornwall, UK.
Posts: 147
Default Re: VCM 163 problem while calibrating

Have checked the amplifier and oscillator board, replaced the transistor and electrolytic. Got a bit confused when checking continuity on the oscillator board as I could not get continuity from R14 to R19 and there appears to be two R14 on the circuit diagram. Needle does not move towards the calibration mark. The needle does move slightly when turning the mA/V switch and when turning on the 163.
Will now start checking continuity leading from the amplifier and oscillator boards.
Starting to loose heart but will persevere.
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