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My Sencore sc61 comes on with a partial trace spanning only…

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My Sencore sc61 comes on...
My Sencore sc61 comes on with a partial trace spanning only 6 graticules and can't be expanded.Channels a and b vertical position and volts per division controls have no effect on this trace.This problem occurred after scope was in storage for about 1 1/2 years.Power supply is out putting correct voltages.In what section does my problem originate?
Submitted: 10 months ago.Category: Consumer Electronics
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Answered in 2 days by:
10/3/2017
Electronics Technician: Rusty, Customer Service replied 10 months ago
Rusty
Rusty, Customer Service
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Electronics Technician: Rusty, Customer Service replied 10 months ago

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