Re: Low Voltage sony kv14af1
thanks for the replies!
i've already already replaced the main filter cap in the primary side as well as all the caps in the secondary side.
i'm already running out of ideas, help me please. thanks!
duldog
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Last Activity: 09-02-2023, 06:08 AM
Joined: 08-28-2006
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Low Voltage sony kv14af1
i've got a sony kv14af1 with low voltage from its power suppy (B+ is 98V, the other outputs are also low) causing it to have a variety of symptoms.
i separated the power supply from the rest of the tv and substituted a 60w bulb at its main output. the output is still the same.
i've replaced the power supply ic(strf6614), opto-isolator, ref amp (se135) but the output is still the same.
i don't have schematic for this unit and i'm running out of ideas. any help would be greatly appreciated. thanks! -
Re: Cheaper ESR meter
boss, the circuit i built now looks exactly as the diagram shown on the first page. using test resistors of different values (1-10ohms), i was able to determine that the meter deflects to about 90% of the scale (needle moves to the right) with 1ohm R at its probes, about 70% at around 5ohms and it hardly deflects at about 33 ohms. i was just guessing if these readings indicates a reliable indication of the esr of the cap under test.
duldog...Leave a comment:
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Re: Cheaper ESR meter
Just an update:
i modified my previously-built circuit so that it now looks like the circuit presented in the first page. Now my problem is that it can no longer drive my 250uA meter to its full scale deflection. However, i can live with this setup and just calibrate the scale to suit my needs but it would be nicer with a full scale deflection.Leave a comment:
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Re: Cheaper ESR meter
good day everyone!
much to my regret, i've built this circuit even before i was able to read this thread.
anyway, is the circuit posted in the first page makes the meter read lower esr value better? the circuit i built reads about 1ohm at 95% deflection and about 50% deflection at 33 ohms.Last edited by duldog; 09-18-2006, 11:12 PM.Leave a comment:
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