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Author Topic: coby portable lcd tv dvd  (Read 748 times)

Offline charlie

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coby portable lcd tv dvd
« on: July 06, 2011, 01:04:29 PM »
good day sa inyo masters. trouble nito dim picture sa unang bukas ok then after a while dim picture na. me nasusukat akong 11.5v at 5v. usually ba ano nasisira d2? salamat
http://img200.imageshack.us/img200/7236/p1100062n.jpg
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coby portable lcd tv dvd
« on: July 06, 2011, 01:04:29 PM »

Offline kalansing

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Re: coby portable lcd tv dvd
« Reply #1 on: July 06, 2011, 01:26:44 PM »
flourescent backlite ba ito?
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Re: coby portable lcd tv dvd
« Reply #1 on: July 06, 2011, 01:26:44 PM »

Offline jmg

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Re: coby portable lcd tv dvd
« Reply #2 on: July 06, 2011, 03:37:26 PM »
capacitors ng power supply ang kadalasang nasisira jan...
monitor nyo sir b+ at start at kapag nag didim na..
baka makatulong..
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Re: coby portable lcd tv dvd
« Reply #2 on: July 06, 2011, 03:37:26 PM »

Offline panyero

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Re: coby portable lcd tv dvd
« Reply #3 on: July 06, 2011, 04:04:36 PM »
Quote from: jmg on July 06, 2011, 03:37:26 PM
capacitors ng power supply ang kadalasang nasisira jan...
monitor nyo sir b+ at start at kapag nag didim na..
baka makatulong..

second emotion
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Re: coby portable lcd tv dvd
« Reply #3 on: July 06, 2011, 04:04:36 PM »

Offline x13r_kit_0

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Re: coby portable lcd tv dvd
« Reply #4 on: July 06, 2011, 04:23:41 PM »
ilang inch po ba..adapter type yata ito..
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Re: coby portable lcd tv dvd
« Reply #4 on: July 06, 2011, 04:23:41 PM »

Offline panyero

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Re: coby portable lcd tv dvd
« Reply #5 on: July 06, 2011, 04:28:31 PM »
try mo nga palitan ng adaptor sir.
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Offline charlie

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Re: coby portable lcd tv dvd
« Reply #6 on: July 06, 2011, 07:47:05 PM »
salamat sa mga reply mga masters. rechargeable po ito w/ adaptor. ok naman ang suplly 12 at 5v
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Offline emj_e2

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Re: coby portable lcd tv dvd
« Reply #7 on: July 06, 2011, 08:24:00 PM »
ng play pa? with sound? 
actualan mo flex cable
 
yung pa punta sa lcd.. :)
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Offline charlie

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Re: coby portable lcd tv dvd
« Reply #8 on: July 06, 2011, 09:21:40 PM »
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Offline emj_e2

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Re: coby portable lcd tv dvd
« Reply #9 on: July 06, 2011, 09:31:28 PM »
ah . wala pala yang flex cable sa lcd.     
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Offline ultrasonic™

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Re: coby portable lcd tv dvd
« Reply #10 on: July 07, 2011, 12:45:56 AM »
Quote from: belenda on July 06, 2011, 04:23:41 PM
ilang inch po ba..adapter type yata ito..

hulaan  ko... 7" TFT  ;D


@sis charlie bago  mag proceed sa main  board....
be sure na  buong  buo ang kuryente ng power adapter mu....
kong maaari ay tignan  mung  mabuti ang filter  caps...

xa nga  pala... after ng  dimming effect..  as  malalaho  ba ang buo  backlights....? as in 0v  ?

monitor  nyu nga  ang inverter... before & after na nag appeared ang problema ng unit
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Offline charlie

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Re: coby portable lcd tv dvd
« Reply #11 on: July 08, 2011, 08:48:44 PM »
Quote from: ultrasonic™ on July 07, 2011, 12:45:56 AM
hulaan  ko... 7" TFT  ;D


@sis charlie bago  mag proceed sa main  board....
be sure na  buong  buo ang kuryente ng power adapter mu....
kong maaari ay tignan  mung  mabuti ang filter  caps...

xa nga  pala... after ng  dimming effect..  as  malalaho  ba ang buo  backlights....? as in 0v  ?

monitor  nyu nga  ang inverter... before & after na nag appeared ang problema ng unit

yes sis na monitor 25v ac then mag zero volts
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Offline pEN DoTA

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Re: coby portable lcd tv dvd
« Reply #12 on: July 08, 2011, 09:01:21 PM »
palitan mo nlng lahat ng ecap sis mura lng naman ang mga yan
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Offline jmg

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Re: coby portable lcd tv dvd
« Reply #13 on: July 08, 2011, 09:06:26 PM »
kapehan na sir
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Offline x13r_kit_0

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Re: coby portable lcd tv dvd
« Reply #14 on: July 08, 2011, 09:11:17 PM »
 baka may tama inverter ic...
palit muna mga ecaps....
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Offline ultrasonic™

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Re: coby portable lcd tv dvd
« Reply #15 on: July 08, 2011, 09:20:47 PM »
Quote from: charlie on July 08, 2011, 08:48:44 PM
yes sis na monitor 25v ac then mag zero volts

so namamatay nga ang inverter circuit due to protection o mismung inverter ang may problema... o kapos  ito sa supply

sis charlie  pwede mung picturan ng malapitan ang buong board lalot sa inverter sect at sa tact's/control button meron akng  gustong tignan kng yan  ba yun. may prot diode sa bandang yan

check mu nga pala ang limit switch for inverter cutting kong meron...  i know it is so stupid..  alam  nyu  na baka nadadali tayo sa easy trouble. normal na naiisahan  tayo  ;D
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Offline charlie

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Re: coby portable lcd tv dvd
« Reply #16 on: July 12, 2011, 10:01:34 AM »
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Offline charlie

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Re: coby portable lcd tv dvd
« Reply #17 on: July 12, 2011, 10:06:38 AM »
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Offline ultrasonic™

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Re: coby portable lcd tv dvd
« Reply #18 on: July 12, 2011, 03:46:51 PM »
kong  normal ang current rating operation na binibigay ng PSU/Adapter mu

focus ka nga  muna  jan.... smd mosfet or oscillator ic.. hanapin mu ang input at  tutukan  mu ng voltmeter..... refer to datasheet



xa  nga  buksan  mu itong front panel board ng control system
pag may  nakita  kang  diode  try  mung  tanggalin at  palitan  mu  ng resistor kahit 1K or 10K ang value  subok  lang wala  namang mawawala..

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Offline gie62

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Re: coby portable lcd tv dvd
« Reply #19 on: July 12, 2011, 08:19:46 PM »
ok ba ang backlight?
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Re: coby portable lcd tv dvd
« Reply #19 on: July 12, 2011, 08:19:46 PM »
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