Sylvania LC320SS9 Flashing Green LED

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

Did the same here today guys. awhhhhhhhhhhhh WHAT CAN THIS BE!!!!!!!!!!

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

best i could get camera sucks at best....

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

best i could get camera sucks at best....

hey jerry you got a better camera to take pics with so budm can help us? my camera sucks i can see why budm has not replied and i don't blame him those pic's sucks....sorry budm i will see if a friend of mine has a better camera....

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

Boy! There are lots of parts on the bottom of the board, a lot more than I expect.
So right now, the backlights flashes on then go off?

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

I'll try to take some tom. Are there any surface mount fuses I am missing guys. Mine is a JVC LT 32em20 but they are the same. This ones got me nuts hahaha I got red light then when I try to pwr on two green flashes then back to red. All diodes are good out of circuit. the big ones on both boards. I checked all that were mentioned in posts. nothing. doing the double two step ass hole polka with this one.

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

OK, I hope I can see focused pictures on the next post, in the mean time, lest check the condition of the 4 MOSFETS that drive the high voltage transformers.
Just take the resistance reading between:
1 & 2
1 & 3
2 & 3

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

My pics are just as bad guys. As far as mosfets.
1+2=7.2 meg
1+3=3.75meg
2+3=2.165meg
The others are the same.
Thanks for all your help guys. This is a bad design.

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

here u go. There terrible guys sorry

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

I took one more but it's still crappy. Next time I will put white in the background.

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Boy! There are lots of parts on the bottom of the board, a lot more than I expect.
So right now, the backlights flashes on then go off?

correct.....

[Jerry7591]

Re: Sylvania LC320SS9 Flashing Green LED

no back lights here. 2 green flashes then back to red. Are there any surface mount fuses on t-con i am missing?

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

OK, I hope I can see focused pictures on the next post, in the mean time, lest check the condition of the 4 MOSFETS that drive the high voltage transformers.
Just take the resistance reading between:
1 & 2
1 & 3
2 & 3

i tried to get resistance reading can't no matter the setting however i found this guide to test mosfet http://www.utm.edu/staff/leeb/mostest.htm and i found i can switch it on and off when desoldered from board ....weird thing is i did a resistance test on mosfet on a motherboard and i can get resistance readings so not sure whats up with that....

[XmouseX]

Re: Sylvania LC320SS9 Flashing Green LED

What voltage are you guys getting on CN601 (the red and black power connector) while the TV is plugged in?

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

What voltage are you guys getting on CN601 (the red and black power connector) while the TV is plugged in?

i get 175 volts at that connection

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

here is top view pic from shop jimmy nice and clear..working on bottom view

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

new pics hope you can work with this budm....

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

Hate to say this, but pictures #1~3 (100-2059~1002061) are out of focus.
There are 3 IC hsown on the first picture, do you have the P/N printed on them?

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

Hate to say this, but pictures #1~3 (100-2059~1002061) are out of focus.
There are 3 IC hsown on the first picture, do you have the P/N printed on them?

yeah different camera still sucks...


ic starting from top
ic#1.....87 a3 95km
lm324
ic#2 0z9926asn
mb4334 2g
0827c2
ic#3 same as ic#1

[heavymachines]

Re: Sylvania LC320SS9 Flashing Green LED

yeah different camera still sucks...


ic starting from top
ic#1.....87 a3 95km
lm324
ic#2 0z9926asn
mb4334 2g
0827c2
ic#3 same as ic#1

and ic # 1 and 3 are Texas Instruments parts

[budm]

Re: Sylvania LC320SS9 Flashing Green LED

LM324 is the Quad Op-amp.
OZ9926 is the PWM IC made by O2 MICRO.

I need to study its function first.