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Old 12-20-2018, 09:35 AM   #6
budm
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Join Date: Feb 2010
City & State: S.F. Bay area
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Default Re: Replacing a choke coil

The Inductor looks to be used for Buck converter (see how the Inductor and the diode are connected to verify), not for filtering so you need to get the correct one otherwise the output Voltage will not be correct.
Look at the application circuit of that 494 spec sheet.
Page 17 has the inductance calculator but you need to know many requirement info to come up with the correct inductor.
BTW, what is the color of that TOROID Ferrite/or Iron powder core? Light Blue? Gray?
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Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956

Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999

Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl

Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/

TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809

Last edited by budm; 12-20-2018 at 09:58 AM..
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