Question about Samsung TXE2045 20" TV
TV must warm up before tuning channels 2-6. Only snow + loud static on channels 7-22. Do I need to replace the tuner?
Hi and welcome to FixYa,
Offhand, not yet but could be after test/diagnosis. Initially, you must first determine for the presence/absence of the variable 33VDC tuning voltage. This voltage varies depending on what channel is tuned into thereby setting the VCO (voltage controlled oscillator). In some instances, it could be a faulty/leaked capacitor in the 33V supply or even a zener diode. Faulty capacitors are easily identified by bulging top (normally flat), blistered/split casing, brownish paper within the immediate surrounding, rubber bottom partially out and/or powdery residue on one of the pins. The diode is tested like any semiconductor, forward and reverse bias.
Good luck and thank you for using FixYa.
Posted on Feb 11, 2009
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Posted on Jan 02, 2017
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