averias resueltas lcd plasma tv.doc

8/11/2019 AVERIAS RESUELTAS LCD PLASMA TV.doc

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Here we'll be providing a collection of LCD TV repair cases, gathered from a goodreliable source. We've seen some of these cases in our repair lab and have proven to bever helpful.

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%amsung L&(#)*D+ o picture and no -%D menu. *aclight o./odel0s+ %amsung L&(#)*D LCD TV%mptom+ o picture and no -%D menu. *aclight o.Cure0%olutions+ #eflow LVD% socet on screen driver !C* and mainboard !C*.

%"/%12 L&(#)3*D+ TV dead. !ulsating noise from !%1 and L&D light flashes./odel0s+ %amsung L&(#)3*D LCD TV%mptom+ TV dead. !ulsating noise from !%1 and L&D light flashes.Cure0%olutions+ Chec shott diode D/453 6/*#7$535CT8 in !%1 for short circuit.

*1%H LCD(TV995HD+ "fter TV on few seconds, then the TV off again./odel0s+ *1%H LCD(TV995HD "!H999 Chassis *&:- L/ LCD TV%mptom+ !icture appears for a few seconds after switch on, after that the TV switchesoff again.Cure0%olutions+ Chec C(93( and C(933 6both ;49uf05v8 in !%1 for capacit loss.

*1%H LCD(TV995HD+ o !icture and no bac light. 7ront controls react and remotecontrol does not./odel0s+ *1%H LCD(TV995HD "!H999 Chassis *&:- L/ LCD TV%mptom+ o !icture and no baclight. The front controls was woring but remotecontrol does notCure0%olutions+ #eplace )*+ o functions after lightning strie/odel0s+ =VC LT(D>)* LCD TV%mptom+ o functions after lightning strie.Cure0%olutions+ The primar voltage 99v is present. *ut secondar voltage output wasonl ($ volt. #eplace standb transformer T?(9$.

%harp LC(!55&+ #ed L&D appears for a seconds, rela clics then dead./odel0s+ %harp LC(!55& LCD TV

%mptom+ #ed L&D appears for a seconds, rela clics then dead.Cure0%olutions+ The resistor #)5$ blown. #eplaced


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picture.Cure0%olutions+ !lease chec the ()/HB :D% uartB crstal 6%%*, item $H998.


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%mptom+ o startAup, red L&D flashes times.Cure0%olutions+ TV has slow startAup before this smptom occurred. When checstandb 5v o and !%1 is heat sensitive. Chec and replace the C;955 63)uf0(5v8 in 2(suppl it will solve the problem.

*1%H LCD(TV9((HD+ E",L3;";59"$7>E",L39")59#$7>EC,L3;")59#$7>E",L39")59#$7>E" LCD TV%mptom+ 1nit tries to start with melod but ccles off and bac onCure0%olutions+ "" lost brightness when ou replaced /"0>"" LCD TV%mptom+ LT3;;57>0>"" lost brightness when ou replaced /"


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W-1LD %T"F - "D #1 %amsung most model+ 7licering on the screen intermittentl/odel0s+ %amsungL(*;9C5D>E",L(*59!)7>E",L(*3;9*(D>E",L(*539!4D>E",L(*559:$7>E",L)*59!)7>E",L)*559:$7>E",L39*559:$7>E",L39*59!)7>E",L39*59!)>E",L39*59!)7>EC,L39*539!47>E",L3;*59!)>E",L3;*59!)7>E",L3;*559:$7>E",L3;* 539!47>E".%mptom+ 7licering on the screen intermittentlWhen the unit is connected via HD/< to a %cientific "tlanta cable set top boI set in b

pass mode for resolutions 349p and )(9p a flicering will occur.Cure0%olutions+ Change the cable boI to a fiIed resolution. -# Have the customer

install the latest TV firmware which can be located on samsung.com.

%amsung most model+ 1nit ccles on0off during startup/odel0s+ %amsungL3;"559!7>E",L3;";59"$7>E",L3;"59!$7>E",L3;")59#$7>E",L3;"4;9%(7>E",L3;"?59D$7>E",L3;"539!(7>E",L3;"459%$7>E",L3;";9/$7>E",L3;"549!;7>E",L5("59!$7>E",L5(")59#$7>E",L5(";59"$7>E",L5("559!7>E",L5(";9/$7>E",L5("4;9%(7>E",L5("459%$7>E",L5("539!(7>E",L39"59!$7>E",L39"359C$D>E",L39"9=$D>E",L39"559!7>E",L39";59"$7>E",L39";9/$7>E",L39"539!(7>E" LCD TV.%mptom+ 1nit ccles on0off during startupCure0%olutions+


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%amsung+ L("359L("9+ Video will intermittentl turn mostl white/odel0s+ %amsungL("359C$D>E",L("359C$H>E",L("359CH>E",L("

9=$D>E",L("9=$>E" LCD TV%mptom+ Video will intermittentl turn mostl whiteWhite displa with a faint image of -%D 6-n %creen Displa8 and video in the

bacground. Video will intermittentl turn mostl white with the -%D barel visible inthe bacground. &ven a blac image or when the panel should not be showing anvideo, it is white. < found that one of the subAboards inside the panel, the boards that theribbon cable from the TACon connect to, are not seated properl and the larger %/Dcapacitors on the board are intermittentl maing contact with the metal frame of theset, effectivel creating a short to ground.This is one of the panels that are mounted upside down, so the stand mounts Just belowand behind the panel frame. "n slight pressure from the stand can cause the frame to

mae contact. E",L(*;59T$7>E",L(*3;9*(D>E",L(*539!4D>E",L(*559:$7>E",L(*;39#7>E",L(*35)C;H>E",L(*359C3H>E",L)*35)C;H>E",L)*59!)7>E",L)*;59T$7>E",L)*559:$7>E",L39*35)C;H>E",L39*559:$H>E",L39*599!7>E",L39*559:$7>E",L39*;59T$7>E",L39*59!)7>E",L39*59!)>E",L39*)591$7>E",L39*539!47>E",L39*;$9"57>E",L39*;9$7>E",L39*;39#7>E",L3;*;59T$7>E",L3;*59!)>E",L3;*59!)7>E",L3;*559:$7>E",L3;*;$9"57>E",L3;*539!47>E",L3;*;9$7>E",L3;*;39#7>E",L3;*)591$7>E",L5(*559:$H>E",L5(*;$9"57>E",

L5(*559:$7>E",L5(*539!47>E",L5(*59!)7>E",L5(*;9$7>E",L5(*)591$7>E",L55*;39#7>E",L55*;59T$7>E" LCD TV.%mptom+ 7irmware blining in #ed at the top of the screen.Cure0%olutions+ !roblem A "fter changing the main board,


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$7>0>""%mptom+ *lue screen without signal, with signal Ablue screen with flashing white shorthoriBontal linesCure0%olutions+ #efit or replace LVD% cable, chec if the cable not strangled b themetal cover and loosen up the screws of the cover.

%amsung LT(3((( + Wont !ower -n/odel0s+ %amsung LT(3(H>0>"",LT((H>0>"" LCD TV%mptom+ Wont power onCure0%olutions+ TV would not come on. #emoved the bac and as soon as we did theset came on.7ound glue all on the cables to the smps. Cleaned glue off and cleaned the terminals. %etoperates normall.

"C "L(;)$W+ o startAup. L&D is orange/odel+ "cer "L(;)$W LCD TV

%mptom+ o startAup. L&D is orange.Cure0%olution+ Chec C49 6$99uf.$;v8 under heatsin, neIt to 13( and 1;$ on signal!C* for capacit loss.

%on :DL(1(999+ o !icture/odel+ %on :DL(1(999 Chassis %&$ LCD TV%mptom+ o !ictureCure0%olution+ Chec %/D fuse C!$9$! on LVD% board. The LVD% board is behindthe *DT board.

%-F :DL(%(9$9&+ %witches to standb for a short while, then bac again/odel+ %-F :DL(%(9$9& Chassis W">( LCD TV%mptom+ %witches to standb for a short while, then bac againCure0%olution+ #eplace standb push button on user control, has contact resistance.

!hilips (!7(90$9+ 7 is displaed on screen/odel+ !hilips (!7(90$9 Chassis LC3.5 &"" LCD TV%mptom+ 7 is displaed on screenCure0%olution+ TV is in factor mode. To uit the factor mode, press both V-L1/&A es and !#-2#"/ A for 5 seconds simultaneousl.

L2 (LC5;+ !icture divided into several parts. Distorted picture/odel+ L2 (LC5; LCD TV%mptom+ !icture divided into several parts. Distorted pictureCure0%olution+ #eplace TAC- board 6!art umber+ ($4?38.

L2 (LC5;EC+ o startAup. %tandb L&D flashes from red to green/odel+ L2 (LC5;EC LCD TV%mptom+ o startAup. %tandb L&D flashes from red to greenCure0%olution+ #eplace C(9(, C(9;, C($) and C($4 6((99uf0$9v all8, and C((;63)9uf0(5v8.

2--D/"% 2TV(;WLCD+ %huts down and L&D blins/odel+ 2--D/"% 2TV(;WLCD LCD TV


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%mptom+ %huts down and L&D blinsCure0%olution+ #eplace C4)) and C4)4 6both $5nf0;9V8 near heatsin, at top leftcorner of !%1

*1%H LCD(;TV99;HD>+ o displa. 7lashing standb light

/odel+ *1%H LCD(;TV99;HD> LCD TV%mptom+ o displa. 7lashing standb light.Cure0%olution+ The capacitor C$5 6$999u70(5v8 is supplied higher rated, and is a little

bigger so use longer leads don't fit close to board. *e careful when soldering ou don'taccidentall remove the tin surface mount resistors on bac of board.

%amsung L("9+ The TV taes longer to power on than normal/odel0s+ %amsung L("9=$D>E",L("9=$>E" LCD TV%mptom+ The TV taes longer to power on than normalThe TV taes longer to power on than normal. Fou ma hear several clics while theTV attempts to power on.

Cause+ The electroltic in the capacitors on the power suppl board over time will drout causing the power suppl to shut down during its initial power on ccle.Cure0%olutions+ #efer to the capacitor cross reference guide below for the list of thecapacitors that should be replaced.

%amsung+ 1nit tries to start with melod but ccles off and bac on/odel0s+ %amsungL39";59"$7>E",L3;";59"$7>E",L39")59#$7>EC,L3;")59#$7>E",L39")59#$7>E" LCD TV%mptom+ 1nit tries to start with melod but ccles off and bac onCure0%olutions+ E",L5(";59"$7>EC,L3;";59"$7>EC LCD TV%mptom+ Will not turn on, ccles on and off with startup melod, no baclightsCure0%olutions+ "" LCD TV%mptom+ o video TV, has baclight and audio. TV will not come on.Cure0%olutions+ 7ound pico fuse open at cp$ on the TAC- pcb short cp$ TV comes onruns fine. #eplace the TAC- pcb.

%amsung+ %tandb light is on, flashes once briefl then unit attempts to turn on/odel0s+ %amsung

L("9=$D>E",L("359C$D>E",L("559!7>E",L("539!(D>E",L("9=$>E",L("359C$H>E",L("359C H>E",


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L("99=$D>E" LCD TV%mptom+ %tandb light is on, flashes once briefl then unit attempts to turn onCure0%olutions+ E",L("559!7>E",L("539!(D>E",L("9=$>E",L("99=$ D>E",L39"59!$7>E", L39"359C$D>E", L39")59#$7>E", L39"9=$D>E",L39"559!7>E", L39"539!(7>E", L39"599T$7>E", L3;"59!$7>E",L3;"4;9%(7>E", L3;")59#$7>E", L3;"559!7>E", L3;";59"$7>E",L3;"?59D$7>E", L3;"539!(7>E", L3;"599T$7>E", L3;"459%$7>E",L3;";9/$7>E", L3;"459%$7>E>, L3;"549!;7>E", L5("59!$7>E",L5(")59#$7>E", L5(";59"$7>E", L5("559!7>E", L5(";9/$7>E",L5("4;9%(7>E", L5("459%$7>E", L5("539!(7>E", L5("549!;7>E".%mptom+ "utoAshutdown on (994 LCD TVKs.Cure0%olutions+ 1pon inspections of (994 LCD TV's we have found that the LVD%6ribbon cable8 can cause an auto shut down. &ven if the LVD% cable doesnKt loo

defective tr changing it anwa and retest the TV. E",L3;";59"$7>E",L39")59#$7>EC,L3;")59#$7>E",L39")59#$7>E" LCD TV%mptom+ 1nit tries to start with melod but ccles off and bac on.Cure0%olutions+


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replaced/odel0s+ %amsung LT(3(H>0>"", L%(;5$D>0>"" LCD TV%mptom+ !icture is lost, sound -: after /""" LCD TV

%mptom+ Clicing repeatedl TV will not turn onCure0%olutions+ 7ound ( electroltic $99uf at $;v capacitors on the 5v line C$$5 andC$( bad. -r replace the power suppl.

%amsung+ *aclight 7ailure Testing/odel0s+ %amsungL(*;9C5D>E",L(*59!)7>E",L(*;59T$7>E",L(*3;9*(D>E",L(*539!4D>E",L(*559:$7>E",L(*;39# 7>E",L(*35)C;H>E", L(*359C3H>E", L(*539!4D1E", L(*359CH>E",L(*3;9*(D1E", L(*;9C5D1E", L(*559:$71E", L(*59!)71E",L(*359CH1E", L39*59!)71E", L39*559:$71E", L39*35)C;H>E",L39*559:$H>E", L39*;$9"571E", L39*;39#71E", L39*;59T$71E",L39*;9$71E", L39*539!471E", L39*599!7>E", L39*559:$7>E",L39*;59T$7>E", L39*59!)7>E", L39*59!)>E", L39*)591$7>E",L39*539!47>E", L39*;9$7>E", L39*;39#7>E", L5(*559:$H>E",L5(*;$9"57>E", L5(*559:$7>E", L5(*539!47>E", L5(*59!)7>E",L5(*;9$7>E", L5(*)591$7>E" LCD TVs.%mptom+ *aclight 7ailure TestingCure0%olutions+ *aclight failures can be partial or full failure Chec the baclightsuppl voltage 6refer to service manual8 "" LCD TV%mptom+ 1nit Continuall Ccling -n and -ff. %et turns on and off in a continuousccle. !las the melod each time.Cure0%olutions+ 7irst, chec the power suppl voltages, if missing, replace the power

pcb. eIt unplug the lvds cable.


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/odel0s+ %amsung LT5()$7>0>"",LT3;)$7>0>"" LCD TV%mptom+ TV is ccling, the red led blining and the rela is ccling sometime TV willcome on.Cure0%olutions+ TV is ccling, the red led blining and the rela is ccling sometimeTV will come on. The /ain board replaced, did not fiI. This unit was a #efurb, found

cable from the main board to the side "V Jac was reversed, is not labeled as todirection of use. This cable if reversed will be hot to the touch. 7ound b removing andreplugging and changing direction of cable TV wored. This was tried on both modelnumbers with the same result.

Hitachi )LD;;99+ o sound or intermittent sound/odel0s+ Hitachi )LD;;99, )LD;;99" LCD TV%mptom+ o sound or intermittent soundCause+ !ins of headphone socet touching the chassis.Cure0%olutions+ Trim the pins of the Headphone socet.

Hitachi )LD;;99+ /&CH"


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"T1#"L + $5C


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result, then the will chec the signal board or mainboard. &ven ou change the inverteror !%1 board, the lcd TV still under protection mode. %ometime, the lcd TV has beenfiIed b the repairer, but the don't now the TV still remember the protection modeinside the memor. %o, now ou need to now how to clear this protection error insidethe lcd TV memor.

Cure0%olutions+ !ress @ hold the CH"&L D-W @ V-L1/& 1! buttons, then- the LCD TV. The LCD TV !rotection &rror has been clear @ solve the TV problem.

Hundai+ %low startAup/odel0s+ Hundai


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L2+ o !ower/odel0s+ L2 3)L7;; LCD TV%mptom+ o power

Cure0%olutions+ Change C(9(, C(9; and C($) 6all ((99uf0$9v8 on

L2+ o !ower/odel0s+ L2 )L7;; LCD TV%mptom+ o power1599 6


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!hilips+ !icture Jitter if contrast function is used./odel0s+ !hilips (!7??;;0) LCD TV%mptom+ !icture Jitter if contrast function is used.

Cure0%olutions+ #eplace transistor )5; on %caler board.

!hilips+ o sound/odel0s+ !hilips (/W?9$90) LCD TV%mptom+ o soundCure0%olutions+ Defective sound output


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short circuit.

%-F+ &rror codes 3/odel0s+ %-F :DL391(999 LCD TV

%mptom+ &rror codes 3L&D turns green, flashes 3 times then goes green again and flashes 3 times again. 7use6599m"8 on inverter panel open circuit.Cure0%olutions+ #eplace the fuse on inverter board.

%-F+ o startAup. #ed L&D flashes times./odel0s+ %-F :DL391(999 LCD TV%mptom+ o startAup. #ed L&D flashes times.%low startAup before this smptom occurred. The standb 5v o. !%1 heat sensitive.Cure0%olutions+ Chec C;955 63)uf0(5v8 in 2( suppl.

Toshiba+ Dead/odel0s+ Toshiba (WLT54 LCD TV%mptom+ DeadCure0%olutions+ Chec 74)9 6("8, G4;9 6%T#E33)?8 and D4;;.


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cables coming from control board.

Wharfedale+ %tartsAup, baclight came after that switches off immediatel./odel0s+ Wharfedale LCD($9"7 Chassis $)/*$$; LCD TV

%mptom+ %tartsAup, baclight came after that switches off immediatel.#uns o when inverter board is eIternall supplied with (3v.Cure0%olutions+ #eplace C4)) and C4)4 6$5nf0;9v8 between heatsin of switchingtransistor and larger transformer on the primar side of the !%1.

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Hisense+ Dead with a *ang oise/odel0s+ Hisense LCD3(93&1 LCD TV%mptom+ Dead with a *ang oiseCure0%olutions+ #eplace chopper drive %T#>;);?, #&94 6$9#8 and #&9( 6$59#8 in

primar !%1.

2oodmans+ Dar picture. -%D bounces/odel0s+ 2--D/"% 2TV(W((HD "VE--- Chassis L/%mptom+ Dar picture. -%D bouncesCure0%olutions+ #eplace C(93( and C(933 6;49uf8 in !%1.

Dell W(;99+ &rratic functions/odel0s+ Dell W(;99 LCD TV%mptom+ &rratic functions.%ometime the TV locsAup problem, shuts down, no startAup and no remote control orfront panel functions too.Cure0%olutions+ #esolder or reflow sstem #-/


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"cer+ o function on user control and remote control/odel0s+ "cer "T(9$W LCD TV%mptom+ o function on user control and remote control

When %C"#T module removed, remote control reaction o.Cure0%olutions+ #eplace electroltic capacitors C34 and C59 6both ((9u70$;v8 onmainboard.

*1%H+ o *aclight/odel0s+ *ush


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Hitachi+ CH"2& -7 !-W %1!!LF 7#-/ TF!& $)!W$5A4 @ $)!W$5A? T-$)!W(9/odel0s+ Hitachi (;LD;;99 @ (;LD;;99"*CD, (LD4"$9 LCD TV

Tip+ CH"2& -7 !-W %1!!LF 7#-/ TF!& $)!W$5A4 @ $)!W$5A? T-$)!W(9The original power suppl, version $)!W$5A4 @ $)!W$5A? has now been changed tothe later version $)!W(9When fitting the new power suppl, it ma also be necessar to replace two cables witha new tpe as described below.There is one new part number to replace all. This new part number will suppl a it thatincludes the power suppl and the necessar new cable which ou should use ifreuired.#emove the following connecting leads used with !ower board $)!W$5A4$.#emove cable from !ower board connector !L49; going to /ainboards /*$5&A5 or

/*$5&A) connector !L?9(.(.#emove cable from !ower board connector !L495 going to /ainboards /*$5&A5 or/*$5&A) connector !L?99 .#eplace the two cables with the new cable tpe+-rder ew cable part number V%993?45;CH"2&%+


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/odel !art umber %erial umber 67rom N8(LD4;99" V%(9(4;949 V;$$9$3)$ N(LD4"$9" V%(9(4;949 V;$$9$;4$ N

%amsung+ D&"D *"C:L0>"",L%39?5D>0>"" LCDTV%mptom+ !oor or "", L("359C$D>EC, L("559!7>EC,


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L("559!7>E>, L("359C$D>E>,L(";59"$7>E", L("359C$>ED, L("359C$D>E", L("539!(D>E",L("359C$>E!, L("559!#>ED, L39"59!$7>E", L39"59!$7>E>,L39"359C$H>E>, L39"359C$D>E", 39")59#$7>E", L39"359C$D>E>,L39"59!$7>EC, L39"559!7>EC, L39";59"$7>EC, L39"559!7>E>,

L39")59#$7>EC, L39"9=$D>E>, L39";59"$7>E>, L39"359C$>ED,39"359C$D>EC, L39"9=$D>E", L39"559!7>E", L39";59"$7>E",L39")59#$7>E>, L39"559!#>ED, L39"9=$>ED, L39";9/$7>E",L39"539!(7>E", L39";59"(#>ED,L39";9/$7>EC, L39";9/$7>E>, L39";$9"#>ED,L39"599T$7>E", L39"9=$>E!, L39"359C$>E!, L39";59"$#>E!,L39";$9"$#>ED, L39";59"$7>ED LCD TVs.%mptom+ Troubleshooting 0>"", LT393(H>0>"", LT(5H">0>"",LT395H">0>"", LT(5HT>0>"", LT)5H>0>"", LT(;5HT>0>"",LT(3(HT>0>"", LT(5HT>0>"", LT393(HT>0>"",LT395HT>0>"", LT39)$7>0>"", LT3;)$7>0>"", LT5()$7>0>"",LT3;3(H>0>"", LT3;;7>0>"", LT39;57>0>"", LT3;;57>0>"",LT5(;57>0>"", LT(;(H>0>"", LT(;3(H>0>"", LT(;5H>0>"",LT((H>0>"", LT(3(H>0>"", LT(5H>0>"", LT)(H>0>"",LT39(H>0>"", LT395H>0>"", LT39;$7>0>"", LT3;;$7>0>"" LCDTVs.

%mptom+


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or does it go out after the have had the set on for a period of time. baclight at turn on, while the power suppl and /ain *oard will cause the baclights

to go out after a period of time. board.


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and =$9 6=1/! %/D 9;9 #8.

Hitachi+ #etune of Digital TV channels/odel0s+ Hitachi ((LD35991: LCD TV

Tip+ #etune of Digital TV channels$. !ress the menu button on the remote control to displa the main menu on screen(. 1se the cursor down button on the remote control to highlight '


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/odel+ "/-< (:$ LCD TV%mptom+ o Displa and o %ound#epair0%olution+

When press on the standb mode button, L&D light change from #ed to *lue color butno baclight. Tr to using a wire with a resistor connect the .V to *L- signal,their baclight and screen logo "/-< are present but all front buttons and control nofunctions.#emove the mainboard &&!#-/


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"ll these smptoms were causing b the &%D protection component call it as /LV6/ultiALaer Varistor8.

/odel+ L2 Chassis L")" LCD TV

(L*3D%A1", (L*?DA1", (L*3D%A1", )L*5D7A1C, 3(L*5D7A1C, 3)L*5D7,3)LC)D7A1*, 3)LFD7A1", 5(L*5D7A1C%mptom+ a8 "uto !ower on and !ower -ff

b8 "uto Channel 1p and Downc8 "uto -%D /enu displa#epair0%olution+Chec or replace &/< filter on these location+ L)(?, L)9, L)3$, L)3(, L)3, L)33,L)3;, L)3), L)5$, L)5(, and L)5.

/odel+ L2 3(L:5(9A1", 3(L:59A1", 3(L:559A1" LCD TV

%mptom+ When power on the LCD TV, there is no displaCause+ *ecause the Height of embo is low, when assembling C0!C* to the module, it


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can have a scratch on the bottom on TAcon board.A Thermal pad press the C0!C*A !C* bottom 6scratch point8 is short with C0*ottom 62round8A *ecause of the overAcurrent, it will mae the mainboard damage.#epair0%olution+

Temporar solution is to add isolation cushion sheet between &mbo and C0!C*.

/odel+ L2 (L2)99H, )L2)99H @ 3(L2)99H LCD TV%mptom+ !ower itself -n0-ff.Cause+ Touch


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b. The /C1 6/icrocontroller, /icon @etc8 on the mainboard activel loos for theuser to press !ower -n switch from remote control or the TV itself.c. When a user presses !ower, the /C1 sends a OHighP voltage 69A$.(V transition8 tothe %/!%0!%1 via !ower-n0-ff pin to activate the rest of the voltages.d. "fter the 9A$.(V transition on the !-W-n0-ff pin, the following voltages are

activated on C/49$ and the O/elodP plas.A VampS $4VDCA -D-n0-ffS .VA D5.V S 5VA D$(V S $Ve8 "pproIimatel two seconds later, 5V is applied to the *L1-n0-ff pin.f8 -nce the *L1-n0-ff pin is activated, the L&D arras turn on. CL49$ supplieshigh voltage to the L&D arras. The following voltages are activated on CL49$ 6withrespect to chassis 2D8+A *-T$ S $)9VDCA *-T$A S 35VDC

A T-!$A S 35VDCA T-!$ S $)9VDCA T-!( S $)9VDCA T-!(A S 35VDCA *-T(A S 35VDCA *-T( S $)9VDCg8 High voltage is applied to the panel L&D arras though connectors C39$ andC39(+!in $ and $(A"pproIimatel $)9VDC 6when referenced to the chassis 2D8.AVoltage varies when referenced to connector 2D.!in ; and )A2D 6effective8.A"pproIimatel 35VDC when the baclight is lowest.A2D !insA2D !otential is highest when signal is ?9U dut ccle 6almost DC8.A2D !otential is lowest when signal is $9U dut ccle 6almost 2D8.ALevel is controlled b the mainboard though the *otDim and TopDim pins onconnector C/49$

/odel+ %amsung L$?C59D>E" LCD TV%mptom+ Displa is completel 2reen color onl.#epair0%olution+LVD% cable not properl inserted or dirt in the contact pins. Clean the LVD% cablecontact pins and connect it bac properl.

/odel+ %amsung 13;C;99%7 L&D TV%mptom+ o !ower#epair0%olution+This


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/odel+ %harp LC(;%"$&, LC(;%D$&, LC(%"$&, LC(%D$&, LC3(%"$&,LC3(%D$& LCD TV%mptom+ o Displa, %ound !roblem or Various operational e issues#epair0%olution+


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This smptom is a common fault for this L&D TV. Their problem was causing b L&D


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change to $99U of brightness and contrast.%olution0Cure+7ound some bulged electroltic capacitors on the line of DC suppl to mainboard. "fterreplaced these electroltic caps, the smptom was getting better but not completel.&ven disconnect the front control panel and checing their circuit line till mainboard

also normal.


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7rom the above smptom, it could be one of the DCADC circuits abnormal and causingthis problem. Chec the DCADC circuits and found that V2H voltage not stable and it isabout 3.;V onl. "fter some time, the DCADC circuits all voltages will no output 6oDispla8 and need to power off and then on it again the voltages will come. When theno voltages output, power off the TV, using the finger touch the


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C/(;4$", it is no an signal from it. "fter that checing the C/(;4$" voltage suppl


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1suall when the TV on, TAC- board


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#epair0%olution+7or this LCD TV smptom, so the suspicion parts will be the LVD% cable or their TAcon

board problem. This TV smptom was because of the mainboard LVD% signal are notmatch with timing control in the TAcon board. 7irst checing the LVD% cable both sidescontact pins are clean and no an dirt on the pins. "fter that checing their cable

continuit and it is o. %o the other part is the TAcon board."fter testing TAcon board all voltages normal and stable, so the problem should be in theLVD% connector and their signals processing section. %ince this TV smptom was occurafter half an hour, so it could be the components dr Joints or heat sensitive. %o after

power on the TV, tr to using a plastic rod to pressing the TAcon. When the plastic rodpressing on the LVD% connector socet, the TV screen bac to normalR %o the culprit isthe LVD% connector socet dr Joints. "fter resolder the LVD% connector socet, theLCD TV is o, even after burn test about 3 hours itKs still woring properl.

/odel+ L2 LC)9W9$A"5:$ TAcon *oard

%mptom+ 2re %creen, o displa#epair0%olution+This TAcon board Vin is use $(V as input voltage. 7ound their Vcc input %/D fuse :Topened and loos lie other components has shorted in the circuits. /easure the Vinline ohm values is normal. "fter that checing the other voltage output lines ohm valuesand found that VDD with 2D has 9 ohmR ThatKs mean something was shorted toground. 7inall found that C$9 filter cap was short circuit. "fter replace %/D fuse :Tand C$9 filter cap, the TV is bac to normal.

/odel+ L2 LC3(9W9(A*; LCD !anel with ;4)9CA993;* TAcon *oard%mptom+ %creen %how egative Displa with 7ull #ed Color#epair0%olution+The LVD% cable is o. 7or this tpe of displa smptom, ou must tr to slowlminimum the Contrast feature.


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#epair0%olution+Chec the LVD% cable both contact pins and also using an eraser to wipe clean bothside. *ut it is not help. %o suspect the TAC- board problem. 7rom the smptom on thescreen, if the problem is TAC- board, then it could be their 2amma circuitKs lines

problem.

7ound this TAC- board had (( testing point, 2"//"$N2"//"((. Where theirnormal 2"//" circuit lines voltage level are decrement wa. "fter testing theirvoltage points, found 2"//"$ till 2"//"(9 are using decrement wa it was from$5V till V, but the 2"//"($ voltage point was about 4VR


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#epair0%olution+Chec C49 6$99uf.$;v8 under heatsin, neIt to 13( and 1;$ on signal !C*for capacit loss.

/odel+ "cer "T(9$W LCD TV%mptom+ o function on user control and remote control.When %C"#T module has been removed remote control reaction o.#epair0%olution+#eplaced electroltic capacitors C34 and C59 6both ((9u70$;v8 onmainboard.

/odel+ *ush LCD TV%mptom+ o displa. The standb L&D light is flashing.#epair0%olution+The capacitor C$5 6$999u70(5v8 is supplied higher rated, and it is a little

bigger so use longer leads don't fit close to board. *e careful when solderingou don't accidentall remove the tin surface mount resistors on bac of board.

/odel+ *1%H LCD(TV995HD "!H999 Chassis *&:- L/ LCD TV%mptom+ !icture appears for a few seconds after switch on, and then the TVswitches off again.#epair0%olution+Chec C(93( and C(933 6both ;49uf05v8 in !%1 for capacit loss or bad &%#value.

/odel+ *1%H LCD(TV995HD "!H999 Chassis *&:- L/ LCD TV%mptom+ o !icture and no baclight. The TV front control buttons wereworing but remote control does not function.#epair0%olution+#eplace


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/odel+ *ush


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#epair0%olution+Chec the TAC- Vcc pin corresponding components and found that C593 isleaing and need to replace a new one. "fter replaced C593, this TV is o.

/odel+ Dell W(;99 LCD TV%mptom+ -%D /enu locs after $9 minutes#epair0%olution+Change regulator


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%mptom+ Dar picture. -%D bounces.#epair0%olution+#eplace the C(93( and C(933 6;49uf8 in !%1.

/odel+ 2rundig 21L&"#(HD

/odel0s+ Hisense LCD3(93&1 LCD TV%mptom+ Dead after a *ang oise.

#epair0%olution+#eplace chopper drive %T#>;);?, #&94 6$9#8 and #&9( 6$59#8 in primar!%1.

/odel+ Hisense TL/3)44! LCD TV%mptom+ Dead.TV power on, testing the !%1 secondar output voltage $(V, 5V/ @ (3Vall are S 9V no output. "fter that, testing the standb voltage 5V% also sameas 9VR ThatKs mean it was the standb voltage suppl section malfunction.Checing the &5($ 6%T#A";5$8 pin ) @ 4 has 99V, but pin is 9V.

ormall this !ower


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#eplace 7errite bead L599 and L59$ with a Jumper wire without the ferrite rod.

/odel+ Hitachi (LD;;99"*C LCD T V%mptom+ o picture, but sound o.

Cause+ Dr Joints on components %;() and %;(? near connector !L94 on themain board.#epair0%olution+#eAsolder components %;() and %;(? also chec other components for dr

Joints near the connector.

/odel+ Hitachi (LD)(99 LCD TV%mptom+ Distorted %ound0"udio.%ound is distorted when the set is first switched on. "fter a while the fault clearsand the set wors normall.

#epair0%olution+Tr to reAsolder first, if still the same then replace =oint !W*. p0n+ T!9$;.

/odel+ Hitachi (LD)(99 LCD TV%mptom+ /echanical oise from %creen in Dnamic /odeCause+ Low bac light setting on Dnamic mode.*aclight settings are different for each mode+DF"/


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%elect *ac Light and reduce the setting to 5?.To memorise and eIit %ervice /ode press %tandb.

/odel+ Hitachi )LD;;99, )LD;;99" LCD TV

%mptom+ o sound or intermittent sound#epair0%olution+!ins of headphone socet touching the chassis. Trim these pins and problemsolved.

/odel+ Hitachi L("9$, L("9$", L(H9$&, L(H9$&", L(H9$1,L(H9$1", (LD4D(9&&", (LD4D(91, (LD4D(91" LCD TV%mptom+ "udio is distorted constantl and ma have some bacground noise#epair0%olution+#eplace D435 and D43; 6both 17539( "0(99V $59", part number+

V%999?;;8 on the power suppl board 6!%18.

/odel+ Hitachi (;LD;(99 LCD TV%mptom+ "udio noise ma be heard from speaers when unit is in Tunermode and the volume control is set to near minimum.#epair0%olution+"dd four %/D Jumpers on the "mp board to positions =$99, =$9$, =$9( and=$9 6=1/! %/D 9;9 #8.

/odel0s+ Hitachi (;LD;;99 @ (;LD;;99", (LD;;99"*C,)LD;;99 LCD TVTip+ *urn in /ode when replacing /ain !C*When replacing the main !C* on these models, the new part ma be in the'burn in' mode from manufacture. This will result in the image on screenflashing different colours.To eIit the burn in mode+1se the remote control+$. !ress menu button(. !ress the following button seuence+ 3,),(,5+

. 2o to O-!T


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To enter the hotel mode of these model LCD TV+$. !ress /enu(. !ress the following buttons in seuence+ $,,(,5

/odel+ Hitachi (4LD5(99& LCD TV%mptom+


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Cause+ Various picture problems can be caused b poor connection of theLVD% cable on connector !L$9 on the /ain board.#epair0%olution+#emove LVD% cable from connector !L$9 and reinsert carefull./ae sure both end of the LVD% cable are inserted properl between !L$9

and the displa panel.

/odel0s+ Hitachi (;LD;;99 @ (;LD;;99"*CD, (LD4"$9,)LD;;99, )LD;;99" @ )LD4599, )LD4559, )LD4;99, )LD4)99C,)LD4)99C", )LD4)991, )LD4)991", )LD4"(9, )LD4D$9,)LD4D(9&, )LD4D(91 LCD TV%mptom+ !oor image ualit or solarisation of image."s shown in the images below.This phenomenon ma be intermittentl and onl displaed after a number ofhours0das.

Cause+ The glue on the LDV% cable heats up over time and the propertieschange and creating a contact problem within the cable and the !C*. Thiscauses permanent or intermittent picture problems#epair0%olution+#emove the LDV% cable and clean the connections at the LCD control panel.


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X!L$9 A %C#&& V(9*$AL93. To fit models+(LD4"$9", (LD4;99", (LD4)99C",(LD4)99T1, (LD4)991")8 !art+ V%99534)4 C"*L& LVD% 9!0$9 1L(9();#eference+

LVD%C"*L&To fit model + (LD4;99*48 !art+ V%9934543 C"*L& LVD% 9!0(9#eference+LVD%C"*L&To fit models + )LD4"(9, )LD4D$9,)LD4D(9&, )LD4D(91, )LD4599, )LD4559,)LD4;99, )LD4)99C, )LD4)991?8 !art+ V%995$)4$ C"*L& LVD% 3$!0(9 )H)* LCD TV%mptom+ o functions after lightning strie.#epair0%olution+The primar voltage 99v is present. *ut secondar voltage output was onl ($volt. #eplace standb transformer T?(9$.

/odel+ :-:" LC3("%(4 LCD TV

%mptom+ Displa show Oo


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the -%D came out. &ven tr other signal input lie "V also same problem, butwhen input the F!b!r signal, it can show the displa properl. *ut theirresponses to call out the -%D /enu still the same, slowl to come out.#epair0%olution+%ince the signal F!b!r displa o but the "V and TV show error message Oo

%ignal


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#epair0%olution+#eplace %/D capacitor at output of /odel+ L2 )L7;; LCD TV%mptom+ o power


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#epair0%olution+#eplace TAC- 6!art umber+ ($4?38.

/odel+ L2 (LC5;EC LCD TV

%mptom+ %tuc in standb mode.#epair0%olution+Chec @ change C(93. W(HD< LCD TV%mptom+ o sound or picture. The front controls light up @ rela clics.#epair0%olution+Chec or replace #;5 6(/8 around 1 !%1 for open circuit.

/odel+ !anasonic T>A(L&D)7/ LCD TV%mptom+ Dead.#epair0%olution+#eplace the resistor #459 64(9:09.(5W8.

/odel+ !anasonic T>A(L&D)7/ Chassis 2L!((/ LCD TV%mptom+ &nter %ervice /ode.#epair0%olution+$. !ress 7 button to access volume setting.(. !ress VA button on set until volume reaches minimum.. While still holding VA button press 9 button three times on remote control.3. !ress $ and ( buttons to scroll through the menu.5. !ress and 3 buttons to select an adJustment.;(8 /odel+ !anasonic TC(L>45 LCD TV%mptom+ TV does not respond from remote control signalCause+ Lea lines filter 7L39;.#epair0%olution+#eplace 7L39; 6!artY+ =-H"FF9999$$8.

/odel+ !anasonic TCA(L>;99 LCD TV%mptom+ Colour distorted with patches around obJect, sometimes happenedafter running for 3 hours.Cause+ Digital signal processing error#epair0%olution+Tr to reflow or replace 45 @ TCA(L>45 LCD TV%mptom+ %ound distortions, mostl noticeable during commercial

programmingCause+ %ome stations send out of the specs signal causing sound distortion in


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higher freuencies.#epair0%olution+%oftware upgrade is needed if unit has serial number before specified below+ZZ4(9)3; for TC(;L>45ZZ4(393( for TC(L>45

!erform the upgrade following below steps+$. Turn on TV and insert %D card into %D card slot.(. 1sing remote control[s left0right arrow button, select F&% to start thedownload.. When upgrade was completed, the screen will change3. 1nplug the TV from "C line and plug it bac after several seconds. !ower onthe TV and it is bac to normal now.

/odel+ !hilips (!7(90$9 Chassis LC3.5 &"" LCD TV%mptom+ 7 is displaed on screen

#epair0%olution+TV is in factor mode. To uit the factor mode, press both V-L1/& Aes and !#-2#"/ A for 5 seconds simultaneousl.

/odel+ !hilips Chassis *=.9& L" LCD TV%mptom+ %witches off for a second or two intermittentl. #ela clics andstandb L&D remains green. When the TV switches off intermittentl withgreen L&D lit, TV wills no sound or no picture.#epair0%olution+!lease chec the ()/HB :D% uartB crstal 6%%*, item $H998.


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/odel+ !hilips 3(!7);($0D$9 LCD TV%mptom+ %tuc in standb. TV switches to protection mode. 2reen L&Dflashes.#epair0%olution+

#eplace capacitors (539 and (533 6both $9n78. Change to both with ((9n7.

/odel+ !hilips Chassis *=.9&L" LCD TV%mptom+ %witches off for a second or two intermittentl.#ela clics and standb L&D remains green. TV switches off intermittentlwith green L&D on, no sound or picture.#epair0%olution+Chec ()/HB :D% uartB crstal 6%%*, item $H998. #eplace all ellowmared crstals 6made in China8 bearing a 5&, 5= or 5: batch number."lso replace all silver mared crstals 6made in Taiwan8 bearing a ;D batch

number. ote+ #eplace crstals with order code (3((539$?).

/odel+ !olaroid 7L/(( LCD TV%mptom+ o startup.#epair0%olution+#eplace E? Bener diode with T&!3??9 in the !%1.

/odel+ %amsung L&()T5$* LCD TV%mptom+ Dar frame with color stripes.#epair0%olution+


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ccle.#epair0%olution+#efer to the capacitor cross reference guide below for the list of the capacitorsthat should be replaced.

/odel0s+ %amsung L39";59"$7>E", L3;";59"$7>E",L39")59#$7>EC, L3;")59#$7>E", L39")59#$7>E" LCD TV%mptom+ 1nit tries to start with melod but ccles off and bac on.#epair0%olution+"", L%(;5$D>0>"" LCD TV

%mptom+ !icture is lost sound -: after /""" LCD TV%mptom+ 1nit Continuall Ccling -n and -ff. %et turns on and off in acontinuous ccle. !la the melod each time.#epair0%olutions+ 7irst, chec the power suppl voltages, if missing, replacethe power !C*. eIt unplug the lvds cable.


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1


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LT3;;57>0>"" and LT3;;$7>0>"" when ou replaced the board ispossible to lost the brightness. 2o in %V0>"", LT3;)$7>0>"" LCD TV%mptom+ TV is ccling, the red L&D light blining and the rela is cclingsometime TV will come on.#epair0%olution+TV is ccling, the red L&D light blining and the rela is ccling sometime TVwill come on. &ven the /ain board replaced, did not fiI. This was a used unit,found cable from the main board to the side "V Jac was reversed, is notlabelled as to direction of use. This cable if reversed will be hot to the touch.7ound b removing and reAplugging and changing direction of cable TV wored.This was tried on both model numbers with the same result.

/odel0s+ %amsungL(*;9C5D>E",L(*59!)7>E",L(*;59T$7>E",L(* 3;9*(D>E",L(*539!4D>E",L(*559:$7>E",L(*;39#7>E",L(*35)C;H>E",L(*359C3H>E",L)* 35)C;H>E",L)*59!)7>E",L)*;59T$7>E",L)*559:$7>E",L39*35)C;H>E",L39*559:$H>E",L39* 599!7>E",L39*559:$7>E",L39*;59T$7>E",L39*59!)7>E",L39*59!)>E",L39*)591$7>E",L39* 539!47>E",L39*;$9"57>E",L39*;9$7>E",L39*;39#7>E",L3;*;59T$7>E",L3;*59!)>E",L3;* 59!)7>E",L3;*559:$7>E",L3;*;$9"57>E",L3;*539!47>E",L3;*;9$7>E",L3;*;39#7>E",L3;* )591$7>E",L5(*559:$H>E",L5(*;$9"57>E",L5(*559:$7>E",L5(*539!47>E",L5(*59!)7>E",L5(* ;9$7>E",L5(*)591$7>E",L55*;39#7>E",L55*;59T$7>E" LCD TV%mptom+ 7irmware blining in #ed at the top of the screen#epair0%olution+ !roblem A "fter changing the main board,


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Change the cable boI to a fiIed resolution. -# have the customer install thelatest TV firmware which can be located on samsung.com.

/odel0s+ %amsung

L3;"559!7>E",L3;";59"$7>E",L3;"59!$7>E",L3;" )59#$7>E",L3;"4;9%(7>E",L3;"?59D$7>E",L3;"539!(7>E",L3;"459%$7>E",L3;";9/$7>E",L3;" 549!;7>E",L5("59!$7>E",L5(")59#$7>E",L5(";59"$7>E",L5("559!7>E",L5(";9/$7>E",L5(" 4;9%(7>E",L5("459%$7>E",L5("539!(7>E",L39"59!$7>E",L39"359C$D>E",L39"9=$D>E",L39" 559!7>E",L39";59"$7>E",L39";9/$7>E",L39"539!(7>E" LCD TV%mptom+ 1nit ccles on0off during startAup.#epair0%olution+

E",L("9=$>E",L("99=$D>E",L39"59!$7>E",L39"359C$D>E",L39")59#$7>E",L39" 9=$D>E",L39"559!7>E",L39"539!(7>E",L39"599T$7>E",L3;"59!$7>E",L3;"4;9%(7>E",L3;")59#$7>E",L3;" 559!7>E",L3;";59"$7>E",L3;"?59D$7>E",L3;"539!(7>E",L3;"599T$7>E",L3;"459%$7>E",L3;";9/$7>E",L3;" 459%$7>E>,L3;"549!;7>E",L5("59!$7>E",L5(")59#$7>E",L5(";59"$7>E",L5("559!7>E",L5(";9/$7>E",L5(" 4;9%(7>E",L5("459%$7>E",L5("539!(7>E",L5("549!;7>E"%mptom+ "utoAshutdown on (994 LCD TVKs.#epair0%olution+

1pon inspections of (994 LCD TV's we have found that the LVD% 6ribboncable8 can cause an auto shut down. &ven if the LVD% cable doesnKt loodefective tr changing it anwa and retest the TV. E",L(*59!)7>E",L(*;59T$7>E",L(* 3;9*(D>E",L(*539!4D>E",L(*559:$7>E",L(*;39#7>E",L(*35)C;H>E",L(*359C3H>E",L(*539!4D1E",L(* 359CH>E",L(*3;9*(D1E",L(*;9C5D1E",L(*559:$71E",

L(*59!)71E",L(*359CH1E",L39*59!)71E",L39* 559:$71E",L39*35)C;H>E",L39*559:$H>E",L39*;$9"571E",


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L39*;39#71E",L39*;59T$71E",L39*;9$71E",L39* 539!471E",L39*599!7>E",L39*559:$7>E",L39*;59T$7>E",L39*59!)7>E",L39*59!)>E",L39*)591$7>E",L39* 539!47>E",L39*;9$7>E",L39*;39#7>E",L5(*559:$H>E",L5(*;$9"57>E",L5(*559:$7>E",L5(*539!47>E",L5(* 59!)7

>E",L5(*;9$7>E", L5(*)591$7>E" LCD TV%mptom+ *aclight 7ailure Testing.#epair0%olution+*aclight failures can be partial or full failure chec the baclight supplvoltage 6refer to service manual8. "" LCD TV%mptom+ Dead baclight flashes on then off.

#epair0%olution+1nit would flash on then off and audio would wor. Fou could saw video witha flashlight. %ometimes unit would sta on and run if ou ccled on and offman times. 7ound bad solder connection on

/odel0s+ %amsung LT39;57>0>"", LT3;;57>0>"",LT5(;57>0>"", LT39;$7>0>"", LT3;;$7>0>"" LCD TV%mptom+ Half screen is purple colour.#epair0%olution+Half screen is purple color. ThatKs mean LCD panel controller board isdefective. !anel needs to be replaced.

/odel0s+ %amsungLT39;?7>0>"",LT39;;7>0>"",LT3;;?7>0>"",LT(55HT>0>"",LT)5H">0>"",LT393(H>0>"",LT(5H">0>"",LT395H">0>"",LT(5HT>0>"",LT)5H>0>"",LT(;5HT>0>"",LT(3(HT>0>"",LT(5HT>0>"",LT393(HT>0>"",LT395HT>0>"",LT39)$7>0>"",LT3;)$7>0>"",LT5()$7>0>"",LT3;3(H>0>"",LT

3;;7>0>"",LT39;57>0>"",LT3;;57>0>"",LT5(;57>0>"",LT(;(H>0>"",LT(;3(H>0>"",LT(;5H>0>"",LT((H>0>"",LT(3(H>0>"",LT(5H>0>"",LT)(H>0>"",LT39(H>0>"",LT395H>0>"",LT39;$7>0>"",LT3;;$7>0>"" LCD TV%mptom+


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the baclights are on when the set looses video. Fou can probabl obtain thisinformation from the customer before ou schedule the call. "s if the noticedif the screen is completel blac or if it is lit up slightl when the video goes out.The ma be able to notice it better if the stand at an angle to the TV and turnit on or off and see if there is an change in brightness.

when it is first turned on, the T0Con or /ain *oard would probabl be at fault."lwas chec the simple things first, lie a LVD% cable that is not plugged in

properl or a power connector to the panel being loose.There are eIceptions to ever rule, but this generall should help withnarrowing down no video in LCD sets.

/odel0s+ %amsung L("359C$D>E", L("359C$H>E",L("359CH>E", L("9=$D>E", L("9=$>E" LCD TV%mptom+ Video will intermittentl turn mostl white.White screen with a faint image of -%D and video is in the bacground. Videowill intermittentl turn mostl white with the -%D barel visible in the

bacground. &ven a blac image or when the panel should not be showing anvideo, it is white. < found that one of the subAboards inside the panel, the boardsthat the ribbon cable from the TACon connect to, are not seated properl and thelarger %/D capacitors on the board are intermittentl maing contact with themetal frame of the set, effectivel creating a short to ground.This is one of the panels that are mounted upside down, so the stand mounts Just

below and behind the panel frame. "n slight pressure from the stand can causethe frame to mae contact. 0>"", L%3;?;D>0>"",L%39?;D>0>"", L%39?5D>0>"" LCD TV%mptom+ !oor or


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/odel0s+ %amsung L("9=$D>E", L("359C$D>E",L("559!7>E", L("539!(D>E", L("9=$>E",L("359C$H>E", L("359CH>E",L("99=$D>E" LCD TV

%mptom+ %tandb light is on, flashes once briefl then unit attempts to turn on#epair0%olution+0>"", L("359C$D>EC,

L("559!7>EC, L("559!7>E>, L("359C$D>E>,L(";59"$7>E", L("359C$>ED, L("359C$D>E",L("539!(D>E", L("359C$>E!, L("559!#>ED,L39"59!$7>E", L39"59!$7>E>, L39"359C$H>E>,L39"359C$D>E", L39")59#$7>E", L39"359C$D>E>,L39"59!$7>EC, L39"559!7>EC, L39";59"$7>EC,L39"559!7>E>, L39")59#$7>EC, L39"9=$D>E>,L39";59"$7>E>, L39"359C$>ED, L39"359C$D>EC,L39"9=$D>E", L39"559!7>E", L39";59"$7>E",L39")59#$7>E>, L39"559!#>ED, L39"9=$>ED,L39";9/$7>E", L39"539!(7>E", L39";59"(#>ED,L39";9/$7>EC, L39";9/$7>E>, L39";$9"#>ED,L39"599T$7>E", L39"9=$>E!, L39"359C$>E!,L39";59"$#>E!, L39";$9"$#>ED, L39";59"$7>ED LCD TV%mptom+ Troubleshooting E",L39")59#$7>EC, L3;")59#$7>E", L39")59#$7>E" LCD TV


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%mptom+ 1nit tries to start with melod but ccles off and bac on.#epair0%olution+"", LT3;)$7>0>"",LT5()$7>0>"" LCD TV%mptom+ Video %tuttering or Hesitation#epair0%olution+The customer ma complain that the video has a stutter or hesitation whenviewing regular programming, either standard definition or high definition.To fiI, go into the customer menu, select !icture, then scroll to "uto /otion!lus $(9HB and select -ff.This enhancement circuit wors for some movies, but can introduce severe

hesitations and ghosting on regular programming. The customer should also beinformed that this does not affect the $(9HB operation of the panel. The paneloperates at $(9HB regardless of this setting.

/odel0s+ %amsung L5(";59"$7>E", L39";59"$7>E",L3;";59"$7>E", L5(";59"$7>EC, L3;";59"$7>EC LCD TV%mptom+ Will not turn on, ccles on and off with startAup melod, no

baclights#epair0%olution+"",LT39;;7>0>"",LT3;;?7>0>"",LT39)$7>0>"",LT3;)$7>0>"",LT5()$7>0>"",LT39;57>0>"",LT3;;57>0>"",LT5(;57>0>"",LT39;$7>0>"",LT3;;$7>0>""%mptom+ 1nit ccles on and off several times before starting.

#epair0%olution+


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/odel+ %amsung (;, ( @ ) /odel0s+ %amsung L(;*3;9*(D>E" L(;*;9C5D>E"L(;*35)C;H>E" L(*3;9*(D>E" L(*;9C5D>E"L(*539!4D>E" L(*35)C;H>E" L(*59!)7>E"L(*559:$7>E" L)*59!)7>E" L)*559:$7>E"

L)*;59T$7>E"%mptom+ o *aclight but sound o.TV will power up but have no baclight operation 6o displa8. %ound is o.!rocedure+$. Verif that the TV is within the serial number range b checing the ninthdigit in the serial number 6i.e. "E3DCT%5 inth digit is a 58.(. E" LCD TV%mptom+ /ultiple Vertical lines.#epair0%olution+Tr to call out the -%D /enu, the multiple vertical lines that do not go throughthe -%D menu.


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screen.#epair0%olution+#eplace TAC- board and problem solved.

/odel+ %amsung L3;*59!)>E" LCD TV%mptom+ There is colour distortion on obJects or peopleKs faces.#epair0%olution+The LVD% cable can cause this if it isnKt seated correctl. Chec the position ofthe LVD% cable and the contacts. 0>"" LCD TV%mptom+ Half of the screen is blac or purple on all inputs.#epair0%olution+

When call out the -%D menu, the problem also affects the -%D menu, replacethe LCD panel.

/odel+ %amsung LT5()$7> LCD TV%mptom+ Left side of the screen is dar. The right side of the screen havehoriBontal lines with distorted video.#epair0%olution+The smptom also affects the -%D /enu, so replace the TAC- board then

problem solved.

/odel+ %harp LC(!55& LCD TV%mptom+ Dead after startAup. *angAnoise was head before.#epair0%olution+#eplace #)5$ 69.$#0(W8,


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!ress @ hold the CH"&L D-W @ V-L1/& 1! buttons, and then power- the LCD TV. The LCD TV !rotection &rror has been clear @ solved the TV

problem.

/odel+ %harp LCA5(*D491 LCD TV%mptom+ Displa has horiBontal lines, White Displa or 7lashing07licering

picture.Cause+ LCD Driver !W* ribbon cables ma be damaged.#epair0%olution+When servicing units due to an occurrence mentioned above, chec and ifnecessar replace the LCD Driver !W* ribbon cable.

!"#T $$

/odel+ %worth 9""" Chassis 4T!( LCD TV%mptom+ %ometime displa white screen and then bac to normal. "fter

power on the TV, the words O!lease waitP character move to top left side.#epair0%olution+#eplaced the 1493 6"!>$$$)A5V8 and the TV is woring properl now.

/odel+ %-F :DL(%(9$9& Chassis W">( LCD TV%mptom+ %witches to standb for a short while, then bac again.#epair0%olution+#eplace standb push button on user control, has contact resistance.

/odel+ %on :DL(1(999 Chassis %&$ LCD TV%mptom+ o !icture.#epair0%olution+Chec %/D fuse C!$9$! on TAC- board. The TAC- board is behind the*DT board

/odel+ %-F :DL391(999 with %&$ Chassis LCD TV

%mptom+ o startAup, red L&D light flashes times.#epair0%olution+TV has slow startAup before this smptom occurred. When chec standb 5v oand !%1 is heat sensitive. Chec and replace the C;955 63)uf0(5v8 in 2(suppl it will solve the problem.

/odel+ %-F :DL391(999 LCD TV%mptom+ &rror codes 3L&D light turns green, flashes 3 times then goes green again and flashes 3 timesagain. 7use 6599m"8 on inverter panel is open circuit.

#epair0%olution+#eplace the fuse on inverter board.


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/odel+ %-F :LV(;1(5(9 Chassis %&$ LCD TV%mptom+ o picture but sound o.#epair0%olution+

Chec %/D fuse C!$9$! on LVD% panel 6TAC-8.

/odel+ %on :DL(1(999 Chassis %&$ LCD TV%mptom+ %tuc in standb. %tandb L&D light is green.#ed L&D light flashes times. o remote control or front panel functions.#epair0%olution+Chec or replace D9$ Bener diode 6can be use a 5v Bener diode8 for shortcircuit.

/odel+ %lvania LCA3(9%%* 6"4$ H$1H8%mptom+ High freuenc noise from power transformer T;99 when the TV isin the standb mode.#epair0%olution+#emove diode D;55 from the power suppl.

/odel+ %lvania LC3(9%%4 LCD TVWith !ower %upplies+$&%"(9444$&%"(9444A!W$&%"$3)$9$&%"$3)$9A!W%mptom+ Low level hums 6buBB8 sound from speaers.#epair0%olution+!erform the following fiI on the power suppl board.$. Cut =umper =((9.(. Cut =umper =(5;.. %older a wire 6about $39mm "W2(98 from =$?9 to =(5;. -n =(5;, solder the

Jumper on the "udio "mplifier 6


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6%TATH$(#9;7!8 also shorted. Chec %/D

averias resueltas lcd plasma tv.doc

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