Question about Samsung DVD-V4600 DVD Player/VCR
Check the power button
Posted on Feb 04, 2010
The 43 Volt Zener Diode is shorted, this occurred with my dvd-v4600. It's a glass colored zener diode near the buzzing transformer, it has the part number z43 stamped on it. Also since it was on almost 24x7 for over five years it tended to dry up the electrolytic capacitors on the power supply. An ESR meter would be needed to measure the capacitors so you know which ones to replace. The remaining electrolytics on the VCR and DVD board should be checked, this unit has a lot of them.
Posted on Oct 22, 2011
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Posted on Jan 02, 2017
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Is the hum in the receiver-attached speakers or the sub?
How is the sub attached - RCA or speaker-level?
Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.
If it hums with the sub attached, unplug the sub's power cord. Differences in AC ground potentials will generate hum across linked devices.
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