585/Repairs: Difference between revisions
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</gallery> | </gallery> | ||
:--[[User:Peter|Peter]] ([[User talk:Peter|talk]]) 02:45, 4 May 2019 (PDT) | :--[[User:Peter|Peter]] ([[User talk:Peter|talk]]) 02:45, 4 May 2019 (PDT) | ||
==wavy trace == | |||
:'''Symptom:''' wavy trace | |||
:'''Root cause:''' C783 (15µF 20V) has high internal resistor (ESR ~ 20 ohms). -12.6 v regulator ciruit is oscillating | |||
:'''Solution:''' Replacing of electrolytic capacitor C783 with new part. | |||
:<gallery> | |||
585 wavy trace.JPG | wavy trace | |||
585_wavy_trace_new_electrolytics.JPG | -12.6 v PSU with new eletrolytics. | |||
</gallery> | |||
:--[[User:Matt|Matt]] ([[User talk:Matt|Matt]]) 02:45, 4 May 2019 (PDT) | |||
[[Category:Instrument repair reports]] | [[Category:Instrument repair reports]] | ||