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Scopex 4D-25 Oscilloscope Repair Help
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10th Oct 2017, 4:59 pm
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dave cox
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Join Date: Jan 2009
Location: Bristol, UK.
Posts: 2,061
Re: Scopex 4D-25 Oscilloscope Repair Help
A current overload could cause TR682 to turn off, check the voltage across R683. If TR684 turns ON it stops the drive to TR683 / TR682.
PS TR681 causes the '-20' rail to mirror the '+20' rail
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