YSUS board : EAX50221902~EBR50221403~42G1A-YSUS schematics

[ANDRASONI LUCIAN]

Hi friends! The module YSUS is for LG plasma TV chassis 42PG100R PP81B.Ar be possible to find a schema for this module? Thanks in advance! The best regards from Romania!

[Alastair E]

Re: YSUS board : EAX50221902~EBR50221403~42G1A-YSUS schematics

LG never released any schematics of any plasma Y-SUS or Z-SUS boards, but there's a few PSU schematics around for some models--but not many.

Z-SUS/Y-SUS were 'NON Serviceable Items', meaning the whole thing is to be replaced if faulty--According to LG...

Samsung is the same. ONLY Y-SUS etc diagrams Ive Ever seen are from Panasonic,--Which came out the 'back-door' in Japan!

Problem is--These makers--particularly the Koreans don't want you to fix the sets. They want Dealer-Only to repair 'em and to do so by replacing whole circuit-boards, and not by proper repairs.
--IF set cant be fixed--They'll sell you a new one--Win/win to the makers!!

IF you happen to find any--which is unlikely--Let us know where!!

[ANDRASONI LUCIAN]

Re: YSUS board : EAX50221902~EBR50221403~42G1A-YSUS schematics

Thank for answer.Corect, can not troubleshoot the component level, however there can be no question YSUS d replacement module (the price is too high to justify the investment).The best regards, from Romania, all the best!

[Alastair E]

Re: YSUS board : EAX50221902~EBR50221403~42G1A-YSUS schematics

Thank for answer.Corect, can not troubleshoot the component level, however there can be no question YSUS d replacement module (the price is too high to justify the investment).The best regards, from Romania, all the best!

Component-level is possible--Just a whole-lot more difficult! Y-SUS is basically a couple of 'H' Bridges, with IGBT's generally as the active devices driven by MOSFET drivers and transistor-pairs, themselves driven by inverters/gates/Shmitt triggers via buffers from the Control-Board....

Also on there, there's a couple of floating/separate supplies such as -Vy, and VSC/VScan, 15V and 5V derived from (depending on model) the 5V rail or the Vs rail by DC/DC Converter--These supplies feed different tails of the various 'H' bridge parts....