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coryking
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PostPosted: Fri Aug 20, 2010 7:27 pm    Post subject: symphonic tv help Reply with quote

i have a symphonic LCD color tv model WF15L5 the backlight comes on but doesnt brighten up the screen and has poor luminessence
any help?
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jts1957



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PostPosted: Fri Aug 20, 2010 7:35 pm    Post subject: Reply with quote

Unit will power on and show a picture but it is negative. The circuit board at the top of the screen is marked UD150XD and Q201 is a 6 legged ic that is a lump of ash (crispy critter).
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coryking
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PostPosted: Mon Aug 23, 2010 6:57 pm    Post subject: fix? Reply with quote

where can i find a new ic chip? any websites?
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The_AntiRAM
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PostPosted: Mon Aug 23, 2010 7:19 pm    Post subject: Re: fix? Reply with quote

coryking wrote:
where can i find a new ic chip? any websites?




You need to change the complete UD150XD T-Con Board not only the "chip".

Search Gooooooooooogle you will find somewhat.
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jts1957



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PostPosted: Mon Aug 23, 2010 7:38 pm    Post subject: Reply with quote

(Thanks to Kenny B)

Q201 is a 1MZ4T108 is a 4.4 volt switching array consisting of one PNP and NPN transistor. It is driven by IC201. Q201 is sourced from the 10.9vdc line.

Having said that, Q201 controls the 4.4 volt line to the LCD panel which, if it is a crispy critter, doesn't bode well for the set. However you might get lucky and find C260 or C259 shorted. If one of them is shorted you may also have IC201 shorted/toasted etc. (A TL3472CDR op amp). Otherwise you MAY be looking at a panel. The output from Q201 goes to connector 312, pins 3,4 and 35...

Hope that may help you out a bit...
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coryking
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PostPosted: Mon Aug 23, 2010 7:46 pm    Post subject: buy? Reply with quote

is ther a website where i can guy one or a store or anything?
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jts1957



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PostPosted: Mon Aug 23, 2010 7:56 pm    Post subject: Reply with quote

Google number in question. Other than that...
Large parts suppliers: Mouser, Digikey, MCM Electronics.
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PostPosted: Tue Aug 24, 2010 7:05 pm    Post subject: ic chip Reply with quote

there is a six legged ic chip on the board what ic chip is that its apparently common that it fries i have the equipment to fix it i just need to know the part number so i can find one
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jts1957



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PostPosted: Tue Aug 24, 2010 7:31 pm    Post subject: Reply with quote

jts1957 wrote:
(Thanks to Kenny B)

Q201 is a 1MZ4T108 is a 4.4 volt switching array consisting of one PNP and NPN transistor. It is driven by IC201. Q201 is sourced from the 10.9vdc line.

Having said that, Q201 controls the 4.4 volt line to the LCD panel which, if it is a crispy critter, doesn't bode well for the set. However you might get lucky and find C260 or C259 shorted. If one of them is shorted you may also have IC201 shorted/toasted etc. (A TL3472CDR op amp). Otherwise you MAY be looking at a panel. The output from Q201 goes to connector 312, pins 3,4 and 35...

Hope that may help you out a bit...

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coryking
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PostPosted: Wed Aug 25, 2010 5:46 pm    Post subject: ic chip Reply with quote

i tried that one its an eight leg ic chip i need a six leg one its a bit smaller than the 201 that your talking about any ideas on a part number? or maybe what ic it is?
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