lcd led tv concepts questions

Page 1 of 2 1, 2  Next

View previous topic View next topic Go down

lcd led tv concepts questions

Post by sherlanmamaril on Wed Jul 15, 2015 2:35 am

masters sa ngayun po eh gustu ko din matutunan nag lcd at led madami na kung nabsang libro tungkol din dito pero may mga tanung akong nd nabibigyan linaw tungkol dito po, ginawa ko na din tong topic na to para sa beginners po gaya kopo 
 san po ang start circuit na 5 volts? sang board siya? kasi sa libro masyadung ka zoom in , nd ko matuntun po , 
pareho po ba silang may inverter? ang lcd at led? salamt po sana po dameng sumali dito at matutunan sa topic nato pansin kopo kasi wala ditong gantong topic 

salamat po

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by ultrasonic™ on Wed Jul 15, 2015 12:45 pm

yang 5V mkikita mo ang source nyan sa psu = power supply unit... commonly tinatawag din yang standby supply.. ang ibang model gumagamit rin ng 3.3-3.8v.. yan ang gamit ng system para mag execute ng tama...

abwt sa inverter circuit... Yes both of them are using that circuit... yan kasi ang magpapailaw sa ilaw/backlight niya sa panel... pwde rin natin tawagin yang electronic ballast...  ito ang ipasok natin sating isip.. ang lcd at led lcd tv ay pareho lamang ng parts or makina... naiiba lang sila sa backlight na ginamit at sa firmware/features...

sa lcd tv.. ang backlight na ginagamit ay tinatawag na ccfl or known as cold cathode florescent lamp .. yan ay malanipis na florescent lamp na may iba ibang hitsura... may straight, curve, cyclones & etc... daylight ang kulay nyan pag umiilaw





but mostly na gnagamit ay ung straight at curve lng...

Sa LCD led tv naman ay imbis na yang ccfl ay white LEDs ang gamit..



 sa mga lower size like 17"... dalawang ganyan ay sapat na para ma fill up ang buong panel... naka top yan sa upper at lower side ng panel

sa mga highest size like 32, 40, 42 & etc... ay nakahilira na yan mismo sa likod ng lcd panel..




_________________
6th member of STTM
former 2nd member


im always walking on the rain so that no one could see me crying

ultrasonic™
D Battery
D Battery

Posts : 4157
Join date : 2010-08-19
Age : 30
Location : Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Wed Jul 15, 2015 4:06 pm

ang lupit ni master ultra!!!  yung stanbye supply po ay kasama sa madaming wires na supply an sa inverter sa scalar sa mcu audio etc tama po ba ? tagal ko nang hinahanap yun eh about naman po sa backlights nasabi na nga po sa libro yun pero ito pagtatakhan kopo , bakit mag inverter pa po sa mag led na mababa lang voltage??? ang alam ko sa ccfl lang gamitin yun ehehhe o madaming led kaya nd enough 12 volts tama po ba ?

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by ultrasonic™ on Wed Jul 15, 2015 5:21 pm

maliit lng ang supply require ng inverter ckt 12/24v.. depende na rin sa designs... yang supply na yan ay mgsisibing input nya at eko convert into higher one pero less current around micro amp... kaya tinawag xang inverter... dahil galing sa maliit na voltahe ay paaakyatin niya... "fbt topology eka nga".... bali 2-3kv ang output nyan kaya medjo masakit mangagat  ^_^

_________________
6th member of STTM
former 2nd member


im always walking on the rain so that no one could see me crying

ultrasonic™
D Battery
D Battery

Posts : 4157
Join date : 2010-08-19
Age : 30
Location : Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Wed Jul 15, 2015 10:07 pm

lupit niyo talagang mag explain master ehehhe , napansin niyo na icompare ang crt na sanay ko sa lcd o led po 

next topic naman , diba po maaring i drop down ng mga inverter , main board ang mag secondaru outputs? pede kopo bang tanaglin ang main board tapos test? ang inverter? panu po ihang yun eh kabit na siya sa psu , ( hang diode pede ba yun) nd po kaya sasabog psu ko??? may nabasa kao sasabog daw pag nahang ang lahat ata ? nd ko siguradu ? 

bakit kaya lang gustung magtanung sa lcd  led? parang personalan  tanungan na po ata to master ehhehe sana may sumali ding iba , salamat po

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by Electro on Sun Jul 19, 2015 9:33 pm

kailangan talaga yata mag inverter master. naka try ko kasi yan dati master na gumawa ako ng 12v supply direct sa mga white leds. walang umilaw kahit isa. kailangan yata ng mas mataas na voltahe

Electro
D Battery
D Battery

Posts : 1443
Join date : 2010-08-26
Age : 27
Location : Calinan Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by Electro on Sun Jul 19, 2015 9:34 pm

iyang drop down yata master ay nag poprotect yan

Electro
D Battery
D Battery

Posts : 1443
Join date : 2010-08-26
Age : 27
Location : Calinan Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by ultrasonic™ on Mon Jul 20, 2015 4:15 pm

sasabog lng yang psu... kong ang ginalaw mo ay ang feedback ckt or familiar din sa tawag nating biaser nya... binubuo yan ng optoisolator, tl431a or trimmer... kng di nmn yan nagalaw ang cause ng pgsabog ay sadya tlagang may heavy load or shorted loads sa secondary.... 

tungkol nmn jan sa pinagsamang inverter board at psu board... IP board na ang tawag jan.. like this one:



pwde mo bang e test kahit wlang main board? 
yes pwde rin pero di rin gagana ang inverter sapagkat ang main board ang mgpapaandar sa kanya... sa kanya kasi galing ang pang backlight on... now, kng gusto mo tlagang paandarin ang inverter ckt without the help of main board ay galawin mo lng ang oscillator ic ng inverter ckt... push/inject ka ng pang triggering sw nya... pag di kabisado ang mga pins.. tignan niyo nlng sa datasheets nya...

_________________
6th member of STTM
former 2nd member


im always walking on the rain so that no one could see me crying

ultrasonic™
D Battery
D Battery

Posts : 4157
Join date : 2010-08-19
Age : 30
Location : Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Mon Jul 20, 2015 5:04 pm

tama bang vcc po ay yung oscillator ??? siguru need ko muna mag actual bagu magtanung noh po master ultra at master electro ,familiarize sa mag parts , sa mga voltage points at saka na mag advance , ok po klarado lahat ng nasabi ni master ultra bukud sa bl on po hehehe san po makikita yung wire na yun or inverter on po ( iba to sa stny 5 volts po diba? )

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by Oscar on Tue Jul 21, 2015 9:15 am

usaping lcd. makisali na rin mga master. papano namin malalaman kong sira ang mainboard?

sherlan ang osicllator ic. yan yata iyong maliit na smd sa likod ng ip bord. pang pwm para sa inverter

Oscar
C Battery
C Battery

Posts : 279
Join date : 2010-09-22

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Tue Jul 21, 2015 6:38 pm

Oscar wrote:usaping lcd. makisali na rin mga master. papano namin malalaman kong sira ang mainboard?

sherlan ang osicllator ic. yan yata iyong maliit na smd sa likod ng ip bord. pang pwm para sa inverter

oo nga noh ? bkait ang lalim kasi ng term nd ko agad naisip bangag pako eh heheh ,sya yung kumaken ng 12 volts, siya din ang inverter ic tama ba? 

san pala ang bl on na paa pait ang audio ic? 
abotu sa main board dami kasi jaan gaayn gn nd stabek agn bl on voltages, etcd ako maste eh

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by james on Wed Jul 22, 2015 5:59 pm

Pasali po sa usapan wala pong kaalam alam sa mga ganito. Hanggang
led, resistor at battery lang po ang alam.

james
D Battery
D Battery

Posts : 1080
Join date : 2011-11-14

Back to top Go down

Re: lcd led tv concepts questions

Post by Hertz on Wed Jul 22, 2015 9:26 pm

basahin niyo na lang muna ang nasa book nato

LCD Repair Guide

_________________
3rd member of STTM
former 4th member

Hertz
Admin
Admin

Posts : 1475
Join date : 2010-08-12
Age : 36
Location : Cagayan De Oro City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Wed Jul 22, 2015 11:15 pm

Hertz wrote:basahin niyo na lang muna ang nasa book nato

LCD Repair Guide
master hertz eto yung kay jestine yon dba? nabasa kona poto at kung titignan niyo lahat ng pages nd niya nasabi ang audio section bukud dun sa auid ic na madameng paa na parang sa crt tv ang tinutukoy, meron po ba kayun advace sa lcd or lcd secret repair tips? sa totoo kang po yung tanung ko galing sa librong yaan , dun ako natutu ng unte gaya ng tcon, mga ip board etc ,salamat po pala

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by Hertz on Fri Jul 24, 2015 4:18 pm

yes book nga niya yan. madali mo lang naman malalaman kong ano ang sound ic. sundan mo lang kong saang socket nakalagay ang speaker. kong anong pinakamalapit na ic ay iyon ang sound ic. may iilan ilan na ring mga power presentation na pinost sina sir dito. para na rin iyong lebro may mga tips at remedy. paki hanap na lang

_________________
3rd member of STTM
former 4th member

Hertz
Admin
Admin

Posts : 1475
Join date : 2010-08-12
Age : 36
Location : Cagayan De Oro City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Fri Jul 24, 2015 8:27 pm

salamt po sa comment ,, medyu sabog nako kaka isip kais salamt maste hertz

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by danny on Mon Jul 27, 2015 1:58 pm

sub ako dito

danny
D Battery
D Battery

Posts : 399
Join date : 2012-04-16
Location : Seattle, Washington

http://www.washingtonelec.com

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Mon Jul 27, 2015 8:19 pm

aba sir danny andito na din kayo eheh , anu pala mai aambag niyo po? gaya ng isolation method sa crt na hang ang hot , maari din kasing ibaba ng inverter diba ang 12v b plus , ang alam ko hang ang pico fuse, hindi pa kasi ako nakakabukas ng lcd or led ttv nakakakita lang sa pag gawaan wish meron akong makuha

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by ultrasonic™ on Wed Aug 12, 2015 2:50 pm

puede nyung hatulan ang mainboard pg ayaw mg response ang mga buttons.. like secondary power buttons bastat cgurado lng kaung buo lhat ng standby supply...

_________________
6th member of STTM
former 2nd member


im always walking on the rain so that no one could see me crying

ultrasonic™
D Battery
D Battery

Posts : 4157
Join date : 2010-08-19
Age : 30
Location : Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Fri Oct 09, 2015 2:22 am

master buhayin ko tong thread na ito po bakit po yung tv na iba complex ang ip board or psu , sa hot sinde ma y2 na mukang smps ata siya may isa ang parang horizontal drive transformer na crt tv po , unlike sa crt na sa psu isa lang smps , anu po kaya iyon????

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by alvinquimbo on Fri Oct 09, 2015 6:37 pm

abang mode muna sis..di pa ako naksubok nito... reading reading reading

alvinquimbo
D Battery
D Battery

Posts : 729
Join date : 2014-03-29
Age : 28
Location : Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by Hertz on Sat Oct 10, 2015 4:19 pm

post ka ng picture ng tinutukoy mo sherlanmamaril

_________________
3rd member of STTM
former 4th member

Hertz
Admin
Admin

Posts : 1475
Join date : 2010-08-12
Age : 36
Location : Cagayan De Oro City

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Sun Oct 11, 2015 10:32 am

masters sa pag troubelshoot ng psu gaya din ng crt tv po? nd ito ip board pero ganito po kasi, walang secondary voltages po sya , dati nasabog fuse replace ko si fet ok na , may pwm sya pero nd po mag on , naisip kopo nd kaya binabarahan ng load ko gaya ng inverter board or ip board ang psu? maaari ba yun?
kaya ginawa ko hang ko main board at inverter wire, wala pa din po

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by sherlanmamaril on Sun Oct 11, 2015 10:52 am

try kopo magpost ng link yung y board oled pala yun kasi hehehe

sherlanmamaril
C Battery
C Battery

Posts : 242
Join date : 2015-07-14
Age : 20
Location : baguio city

Back to top Go down

Re: lcd led tv concepts questions

Post by Electro on Tue Oct 13, 2015 2:02 pm

short mo ang ps-on sa ground master pag tinanggal mo siya sa mainboard

Electro
D Battery
D Battery

Posts : 1443
Join date : 2010-08-26
Age : 27
Location : Calinan Davao City

Back to top Go down

Re: lcd led tv concepts questions

Post by Sponsored content Today at 8:21 am


Sponsored content


Back to top Go down

Page 1 of 2 1, 2  Next

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum