TOSHIBA 32PB1V no stdby light

[nathaniel]

Re: TOSHIBA 32PB1V no stdby light

yes
i did want to make sure ... the last tv i was troubleshooting it was clearly stated on the board pin out list .

this one only says 5v

thank you

[nathaniel]

hi everyone
got from a freind a tv with no stndby light and i know there should be stndby voltage going to the main board (there is POWER_TV pin on PS board but no voltage).

when i test all pins i get 5v on 5 and 6 pins (is this the stndby voltage?)

just want to make sure with you so i order the right board

thank you...

[nathaniel]

Re: LG 32 lcd not always turning ON

update:

got a replacment PS board from a local technician (didn't found the parts victor mentioned available here- so that was my only option)

just wanted to thank you all for your time - the TV WORKS AGAIN!!

THUMBS UP

[nathaniel]

Re: LG 32 lcd not always turning ON

thank again victor
i tried testing these i started testing this time the tv was on

NCP1396AG (test dc between a pin and the chip GND - don't know if it's correct)
pin 9- 65 mV
pin 11 - 7.2V
pin 12- 14.9V

SG6961SZ
pin 5 -2.8V (and pin 6 as GND) also when i touched with only one probe at pin 5 got a little buzzing from the board.



when tring to test pin 7 i accidently touched both 7+8 the main fuse got blown...
replaced it with another one and... blow again...

[nathaniel]

Re: LG 32 lcd not always turning ON

update:
and an hour of heating and cooling the ps
i maneged to get it start twice ( while cooling)
i tried to freeze on area at a time with no success , only when i freeze the all board it will start. :/

victor- i don't believe ican test this components with a multimeter , can i?
if this is the case i think i would be better ordering a replacment board i'm not 100% i can properly solder such a part

[nathaniel]

Re: LG 32 lcd not always turning ON

no i don't have the relay option ...just the two jumpers instead

[nathaniel]

Re: LG 32 lcd not always turning ON

i would like to repair it if possible
ordering a board will take 4-8 weeks with our %@@#$ post service

do you think this is a capacitor symptom or somthing more compicated?

[nathaniel]

Re: LG 32 lcd not always turning ON

just to make sure ... i'm testing the two large capacitors marked c608 and c609

and i still get 330v dc

[nathaniel]

Re: LG 32 lcd not always turning ON

so... does it mean the pson voltage is correct ?
and the power board is at fault

should i replace the capacitors or there is furhter checking to do?

[nathaniel]

Re: LG 32 lcd not always turning ON

i added a picture of what i did:

1k resistor ( rated 1/4w hope its ok) from the 5.2v to pin - inverter on/off
1k resistor from the same 5.2v to pin - power_on

with the a/c plugged in and the main board disconnected

the power_on cam up to2.9v but still no other voltage beside the 5v

am i doing it right?

the board model: EAY4050440


thank you guys...

[nathaniel]

Re: LG 32 lcd not always turning ON

i believe the battery is fine (i normally get a battery icon when low)

i tested with another one i got - the cap read 333v and 1.52v at power_on

* this is the equipment i've got:...

[nathaniel]

Re: LG 32 lcd not always turning ON

update:
the set turned on today and i get this readings:

power_on is 1.5v as when not turning on
but then i get all the other 12v , 16.5v and 24v

at the big caps i get 329v when on and 310v when off

is the problem in the power board ?

* i do not have a capacitance test on my multimeter

[nathaniel]

Re: LG 32 lcd not always turning ON

i'm get this resaults:

1.5v - power_on
5.2v- to logic board
no 16.5v to " "
no 12v " " "
no 24v " inverter board

i hope i get lucky tomorrow so i can test and compare
when it does go on.

victor sorry i don't know what PFC status mean or how to test it.

*excuse me for my poor knowlege in electronics , but i'm learning quickly
thank you all for your patience

[nathaniel]

Re: LG 32 lcd not always turning ON

hi
thanks for the quick reply
i just tested what i think is PSON
i get 1.5v when on 0v when off (while still dont have picture)

is it ok?...

[nathaniel]

hello everyone

my lcd started to make trouble turning ON .
it goes on once a while mainly when i plug out the ac and let it sit for acouple of hours.

when it's not turning ON the led acts normally (blinks a few time red then solid blue) just display or sound wont .

it a 32LG32R

can you please help me out here

thank you for your time !...

[nathaniel]

Re: Toshiba 32A3000P inverter problem!

any sugestions? please....

[nathaniel]

Re: Toshiba 32A3000P inverter problem!

no - only one that is connected to both ccfl

[nathaniel]

Re: Toshiba 32A3000P inverter problem!

is there anything else to check?

if i get an inverter card - is it 100% solution or it still can be another card or the CCFL ?

thanks

[nathaniel]

Re: Toshiba 32A3000P inverter problem!

the MOSFETs all have same resault (not shorted - BUT tested onboard is it ok?)

the fuse also checks out OK (learned somthing new today

[nathaniel]

Re: Toshiba 32A3000P inverter problem!

thanks for the quick reply

i just tested it - seems perfect ...
it has 5 VIN and 5 GND tested them all 24.0v

stupid questions: is there any fuses on this board? (i only recognize a fuse when i see a standard glass type)...