lcd tv repair case histories

8/14/2019 LCD TV Repair Case Histories

1/33

LCD TV Repair Case

Histories

By: Preher-Tech

www.preher-tech.com1
http://www.preher-tech.com/http://www.preher-tech.com/


2/33

Contents

Akai....3

Element....5

Emerson....6

Hyundai....7

LG....8

a!na"o#....1$%hilips....1&

%olaroid....13

'amsun!....15

'anyo....1(

'ceptre....&$

'harp....&1'yl"ania....&&

)oshi*a....&+

,iio....&5

estin!house....&6

/urther eadin!....&8e*sites....3&

%art and )ool 2istri*utors....33

&


3/33

AKAI

LCT2662-

'ymptom

4o power.

epair

eplaced ei!ht &&$$u/ &5, three 33$$u/ 35, and

one 1$$$u/ 16, electrolytic capacitors on the '%' *oard.

LCT271-

'ymptom

4o power stand*y 5, missin!

epair

eplace *oth 1$$$u/ 16, electrolytic capacitors on the '%' *oard.

LCT27!TA-

'ymptom

4o power.

epair

eplaced 1$$$u/ 16, electrolytic capacitors on '%' *oard.

Locations E18 E1( and E&$.

LCT"2#1AD-

'ymptom

), shuts o and stand*ypower LE2 chan!es color.

epair

3


4/33

eplace *ad 1$$$u/ 35, electrolytic capacitors on '%' *oard. Locations E18 E1( and E&$.

LCT$2%6T&-

'ymptom

As ), warms up the picture scram*lesthen the ), shuts down.

epair

eplaced 3&$ 1$$u/ 35" capacitor on the ed!e o the main *oard

"ery close to two '2 re!ulators.

+


5/33

'(e)ent

*L+"21#-

'ymptom

'tand*ypower LE2 li!hts *lue *ut *ackli!hts don9t come on. A red LE2 on thepowerin"erter *oard *links o and on.

epair

eplaced two open capacitors on in"erter *oard.

Locations E17 and E18. :oth were 1$u/ +5$,.

*L+"211B-

'ymptom

4o *ack li!hts

epair

eplaced capacitors E17 and E18 1$u/ +5$ "olts

on the in"erter *oard.

5


6/33

')erson

',L2#-

'ymptom

), turns on *ack li!hts come on and then ), shuts down.

epair

eplaced in"erter *oard.

LC"2#'&!1-

'ymptom

4o power stand*ypower LE2 *links continually

epair

eplaced main *oard.

LC"2#'&!A.-

'ymptom

4o power

epair

eplaced shorted diode in power supply. Location 2633.

6


7/33

Hy/n0ai

'26#D-

'ymptom

4o power stand*ypower LE2 not lit.

epair

eplaced capacitor 6$ ;.$$&& in the stand*y section o the '%' *oard.

LC-2"1!-

'ymptom

4o power powerstand*y LE2 lickerin!

epair

replaced *ad +7$u/ electrolytic capacitor on the secondary side o

the stand*y circuit on '%' *oard.

7


8/33

L

26L+1D-

'ymptom

a"y lines in picture

epair

eplaced two *ad 1$$u/ 16, '2 electrolytic capacitors on the main *oard. Locations 7$8 and7$+.

"2(c20-

'ymptom

4o *ack li!ht

epair

eplaced electrolytic capacitors at locations &$$ and &$& 33$$u/ 1$,

and electrolytic capacitor Location &$8 1$$$u/ 16"olt on '%' *oard.

"2(c20-

'ymptom

?nit will ail when warmed up no "ideo @ust lines.

epair

eplaced *ad electrolytic capacitors at locations &$$ and &$& 33$$u/ 1$, and electrolytic

capacitor at location &$8 1$$$u/ 16"olt on '%' *oard.

8


9/33

"7LC2D-

'ymptom

i!ht take many attempts to turn ), on.

epair

eplaced *ad electrolytic capacitor at location &8$ 1$$$u/ 16, and electrolytic capacitor at location

1&5 +.7u/ 5$, on '%' *oard.

(


10/33

&a3na4o5

1&*""7B-

'ymptom

/lickerin! picture and loud audi*le noise rom ),

may*e *e intermittent start.

epair

eplace *ad electrolytic capacitors on '%' *oard.

Locations 1& 117 and 118 1$$$u/ 16, and Location 175 +7$u/ 16".

"7&*"21D"7-

'ymptom

4o power

epair

eplaced *ad electrolytic capacitors on '%' *oard.)wo &&$$u/ 5$, and two 1$$$u/ 5$,.

"2&*2"1D"7-

'ymptom

'tand*ypower LE2 li!hts *ut ), does not turn on.

epair

eplaced *ad electrolytic capacitors on '%' *oard. Locations &$7( and &$8$ *oth were 1&$$u/35,.

1$


11/33

"2&*""!B*7-

'ymptom

:ack li!hts lickerin!.

epair

/ound 21((+$ shorted and replaced with an 4)E5$6.

11


12/33


13/33

Po(aroi0

*L&"7"2-

'ymptom

Loud screechin! noise rom ), speakers

epair

eplaced *ad electrolytic capacitors at locations 11& and 113 *oth 1$$$u/ 1$, on '%' *oard.

*L&"7"2-

'ymptom

'tand*ypower LE2 comes on no picture or audio and ), can not *e turned o without unplu!!in!.

epair

eplaced *ad electrolytic capacitors on '%' *oard. :oth1$$$u/ 1$,

*L&"7"!-

'ymptom

:uin! noise Line throu!h middle o picture and e"entually no power.

epair

eplaced two 1$$$u/ 1$, electrolytic capacitors on '%' *oard.

13


14/33

*L&"7"B-

'ymptom

Loud *u in audio !oes away ater a ew minutes.

epair

eplaced *ad electrolytic capacitors at locations 11& and 113. :oth 1$$$u/ 1$,.

1+


15/33

a)s/n3

L.26A$#-

'ymptom

4o power

epair

eplaced *ad electrolytic capacitor location 861 &&$$u/ 16, only measured +$$u/.

L."2B$#P!D-

'ymptom

4o power or ), turns on *ut with no *ack li!ht.

epair

eplaced shorted diode at location 2%8$5.

L.$#A6#-

'ymptom

/an1 error displayed

epair

eplaced *ad an sometimes cleanin! the an works as well.

15


16/33

L.261D++AA-

'ymptom

4o power

epair

eplaced open .&& ohm resistor on the '%' *oard at location 8$1.

L.$#$1D++AA-

'ymptom

%ower cycles on and o *eore comin! on also may ha"e some lashin! pi#els.

epair

eplaced *ad electrolytic 1$$$u/ 1$, capacitors on '%' *oard.

L.$#1D-

'ymptom

),


17/33

L.T$#61*++AA-

'ymptom

'et had "ertical colored lines no '2;n 'creen 2isplay> and no remote unction

epair

eplaced *ad electrolytic capacitors on '%' *oard. Locations 11 1& 17 and 16.1$$$u/ 16,

L.T$661*-

'ymptom

)akes a while to come on and when it is on there are red dots all o"er the "ideo

epair

eplaced *ad electrolytic capacitors on '%' *oard. Locations '8$+ ,81& and ,813. All were1$$$u/ 16,.

L.T$66*++AA-

'ymptom

%ower relay continually clicks and the ), ne"er comes on.

epair

eplaced *ad electrolytic capacitors on the '%' *oard. Locations 85& and 853. :oth were&&$$u/ 1$,.

17


18/33

L.T$671*++AA-

'ymptom

)he power relay and indicator LE2 continually cycle on and o.

epair

eplaced *ad electrolytic capacitors on the '%' *oard. Locations 85& and 853. :oth were

&&$$u/ 1$,.

L.T271*++AA-

'ymptom

2ead 'et

epair

eplace 853 B 85& *oth &&$$u/ 1$,. 4ote


19/33

anyo

DP"27$6-

'ymptom

'et would not turn on all secondary supply "olta!es would luctuate up and down.

epair

eplaced *ad opto-isolator


20/33

ceptre

+"2V-Ko)o0o-

'ymptom

4o power sometimes stand*ypower LE2 will *link red.

epair

eplaced *ad electrolytic capacitors +7$u/ 1$, and &&$u/ 35, on '%' *oard. Locations '118

and '&$6.

&$


21/33

harp

LC"7D$"8-

'ymptom

4o :ack li!ht

epair

eplaced use ;/75$&> rated )5$$maon the in"erter *oard.

&1


22/33

y(4ania

662#L*$-

'ymptom

4o audio

epair

'horted capacitor1$$u/ 16,. Location 811.

66"7LCT-

'ymptom

4o power

epair

eplaced shorted diode location 26$3 and open use location /6$1 on '%' *oard.

LC2##L!-

'ymptom

4o power

epair

eplaced shorted diode location 2($& on '%' *oard.

&&


23/33

LC"2#L!-

'ymptom

4o power

epair

eplaced shorted diode at location 25$& and open main use on '%' *oard.

LD"7#!-

'ymptom

2EA2

epair

eplaced shorted diode at location 2633 on secondary side o '%' *oard.

L2##6-

'ymptom

4o power

epair

eplaced shorted diode on '%' *oard. Location 2636..

&3


24/33

Toshi9a

2RV"#8-

'ymptom


25/33

Viio

L"7HDTV-

'ymptom

Am*er li!ht comes on *ut ne"er turns !reen ), does not turn on

epair

emo"e '2


26/33

,estin3ho/se

LTV27,2-

'ymptom

), losses picture and sound once warmed up. 'tand*ypower LE2 stays *lue

epair

epaired *ad solder connection on capacitor 31$ on '%' *oard primary side.

LTV27


27/33

LTV"2,$HDC-

'ymptom

%icture reees.

epair

eplaced main *oard.

&7


28/33

*/rther Rea0in3

'ome !ood *ooks to urther your electronics knowled!e.

Electronic and Electrical 'er"icin! onsumer and ommercial Electronics &nd

edition :y


29/33

How )o /ind :urnt esistor ,alue :y Destine Fon!

L2 onitor epair :y Destine Fon!

&(
http://www.electronic-repair-guide.com/?hop=jptv97501http://jptv97501.jestinewilliamlcd.click2sell.eu/http://jptv97501.jestinewilliamlcd.click2sell.eu/http://www.electronic-repair-guide.com/?hop=jptv97501http://www.electronic-repair-guide.com/?hop=jptv97501http://jptv97501.jestinewilliamlcd.click2sell.eu/


30/33

)estin! Electronic omponents :y Destine Fon!

)rou*leshootin! B epairin! 'witch ode %ower 'upplies :y Destine Fon!

3$
http://www.electronic-repair-guide.com/?hop=jptv97501http://jptv97501.jestinemichellepow.click2sell.eu/http://jptv97501.jestinemichellepow.click2sell.eu/http://www.electronic-repair-guide.com/?hop=jptv97501http://www.electronic-repair-guide.com/?hop=jptv97501http://jptv97501.jestinemichellepow.click2sell.eu/


31/33

)rou*leshootin! 'witchin! %ower on"erters A Hands-on Guide :y 'an@aya

aniktala

'witchin! %ower 'upplies A to :y 'an@aya aniktala

31
http://www.amazon.com/Troubleshooting-Switching-Power-Converters-Hands/dp/0750684216/ref=sr_1_2?ie=UTF8&s=books&qid=1264829276&sr=8-2http://www.amazon.com/Switching-Power-Supplies-Sanjaya-Maniktala/dp/0750679700/ref=sr_1_4?ie=UTF8&s=books&qid=1264829217&sr=8-4http://www.amazon.com/Switching-Power-Supplies-Sanjaya-Maniktala/dp/0750679700/ref=sr_1_4?ie=UTF8&s=books&qid=1264829217&sr=8-4http://www.amazon.com/Troubleshooting-Switching-Power-Converters-Hands/dp/0750684216/ref=sr_1_2?ie=UTF8&s=books&qid=1264829276&sr=8-2http://www.amazon.com/Troubleshooting-Switching-Power-Converters-Hands/dp/0750684216/ref=sr_1_2?ie=UTF8&s=books&qid=1264829276&sr=8-2http://www.amazon.com/Switching-Power-Supplies-Sanjaya-Maniktala/dp/0750679700/ref=sr_1_4?ie=UTF8&s=books&qid=1264829217&sr=8-4


32/33

,e9sites

'ome !ood we*sites or electronics inormation.

%reher-)ech :lo!

%reher-)ech Electronics )ools and )ips %a!e

L2 ), repair mem*ership site

%lasma ), repair mem*ership site

%ro@ection ), repair mem*ership site

electronicrepair!uide.com

Destine Fon!9s :lo!

astrepair!uide.com

3&
http://preher-tv.blogspot.com/http://preher-tech.com/tools_and_tips.aspxhttps://paydotcom.com/r/41874/jptv97501/24320174/https://paydotcom.com/r/28939/jptv97501/24320471/https://paydotcom.com/r/78425/jptv97501/24848135/http://www.electronicrepairguide.com/http://www.jestineyong.com/http://www.fastrepairguide.com/http://preher-tv.blogspot.com/http://preher-tech.com/tools_and_tips.aspxhttps://paydotcom.com/r/41874/jptv97501/24320174/https://paydotcom.com/r/28939/jptv97501/24320471/https://paydotcom.com/r/78425/jptv97501/24848135/http://www.electronicrepairguide.com/http://www.jestineyong.com/http://www.fastrepairguide.com/


33/33

Part an0 Too( Distri9/tors

Here are the parts distri*utors < most commonly use to !et all the parts < need or

i#in! L2 ),s.

'u*ur*an

Encompass

ouser

And < also always like lookin! on e*ay < ha"e *ou!ht many ), and electronic

components on that site in !eneral with !reat deals and < ha"e only had !reattransactions so ar. nly *uy rom reputa*le dealers.

P(aces to p/rchase an 'R )eter-

Electronic epair Guide;also sells in! )ester>

Anatek;also sells in! )ester>

E,:

adio 2e"ices;the E' micro which also checks capacitance>

CC*L Testers-

H-)L1$+$

L')$1

oo0 p(ace to 9/y a==or0a9(e 0i3ita( )/(ti)eters an0 ana(o3/e )eters-

ultimeter arehouse
http://www.suburban-electronics.com/http://www.encompassparts.com/http://www.mouser.com/http://www.mcmelectronics.com/http://www.electronicrepairguide.com/blue-esr-meter.htmlhttp://www.anatekcorp.com/http://clientes.netvisao.pt/greenpal/evb1.htmhttp://www.radiodevices.ru/esr/esr4.htmhttp://www.electronica-usa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=EU&Product_Code=HRTL1040http://www.lcdparts.net/LST01.aspxhttp://www.multimeterwarehouse.com/http://www.suburban-electronics.com/http://www.encompassparts.com/http://www.mcmelectronics.com/http://www.electronicrepairguide.com/blue-esr-meter.htmlhttp://www.anatekcorp.com/http://clientes.netvisao.pt/greenpal/evb1.htmhttp://www.radiodevices.ru/esr/esr4.htmhttp://www.multimeterwarehouse.com/http://www.mouser.com/http://www.electronica-usa.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=EU&Product_Code=HRTL1040http://www.lcdparts.net/LST01.aspx

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