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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Audiovox VE920 blown chip U101, please help me ID it
Hello all,
We have an Audiovox VE920 under-counter LCD TV that has a blown SMD chip U101. When I say blown I mean the top was literally blown off of it, rendering the markings pretty much unreadable. I suspect it is a HEF4051B 8-channel analog multiplexer/demultiplexer since it's right near two other of these on the PCB, namely U102 and U201. I posted a pic of the chips in question at http://i36.tinypic.com/6p2gdg.jpg Can anyone confirm that U101 is indeed also a HEF4051B? Or if not, what is it? Thanks, Russ |
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Audiovox VE920 blown chip U101, please help me ID it
On Sat, 9 Aug 2008 11:56:38 -0700 (PDT), Russell Salerno
put finger to keyboard and composed: Hello all, We have an Audiovox VE920 under-counter LCD TV that has a blown SMD chip U101. When I say blown I mean the top was literally blown off of it, rendering the markings pretty much unreadable. I suspect it is a HEF4051B 8-channel analog multiplexer/demultiplexer since it's right near two other of these on the PCB, namely U102 and U201. I posted a pic of the chips in question at http://i36.tinypic.com/6p2gdg.jpg Can anyone confirm that U101 is indeed also a HEF4051B? Or if not, what is it? Thanks, Russ I can't help with the number, but you may be able to help yourself by working out how U101 and U102 interconnect. For example, do they share the same Vdd, Vss, and Vee pins? Are their Enable pins common? Is the Z input (pin3) common to both? Are the switch selects (A0,A1,A2) common? Here is the datasheet: http://www.nxp.com/acrobat_download/...HEF4051B_4.pdf - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
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