manuel432

[manuel432]

ns-l37q-10a mainboard 715g-3269-1 i need to chek the volts from the mainboard to the t-com board i dont kwno haw to optain the information,
the firs 4 pins show 12 v the rest 1v +- or 0.

[budm]

Re: manuel432

The T-CON board will have surface mounted fuse on it, since you are getting 12 from the main board to the T-CON, next thing will have to find out if the fuse on the T-CON board is good or not. The other pins of the T-CON are small signals that you will need the scope to see.
By the way, what is the problem with this TV? Brand?

[manuel432]

Re: manuel432

the brand is a insignia ns-37q-10a power board is good all volts goin to the
mainbord are good, in the dark the lcd fires up for 3 or 4 seconds, and the
the please whait comes on and a faint liaght wheare the t-com board is
located stay on for 2 more seconds,it comes from a blue diode on the t-com board that light up very bright blue and go off.

[budm]

Re: manuel432

Boy, I never seen LED on the T-CON board before.
So the backlights go away or they stay on but no pictures on the screen?
Do you get any sound?

[manuel432]

Re: manuel432

no i dont have any sound at all, I had sound at the beging when the problem stared, then it whent awy after i mess whid it, I toock the back cover off
moved some comection put it al back and it work for a few hourd and it
stop working at all. please the t-com board # is 6870c-0247a i was thinking
to buy a new t-com bord when i save the mony but i don know if is that the problem i dont whant to spend the mony if is not nessesary.
and last where is the fuse on the board located????.

manuel432

[budm]

Re: manuel432

Please take good pictures of the T-CON board and use Go Advanced to attach the pictures.

[manuel432]

Re: manuel432

I toock some pictures, let see if i do this right.

[Mr Bill]

Re: manuel432

The fuse on the tcon is in the lower left corner of the picture (F1). I did notice that D5 looks burnt. Is it crispy?

[kevinm34232]

Re: manuel432

I would agree, look at D4 looks very different.

[budm]

Re: manuel432

Check the fuse, those two Diode for the dual switching power suppliers. Check the voltages of the US4 1.8V regulator (look at the VCC1.8V pad next to the regulator), the P12V and the VCC test pads.

[manuel432]

Re: manuel432

I check the fuse and it check good, check the diodes set the meter dial to
diode k2 the red lead at the white band of the diode and got .583 _+1
reverse the leeds and got .091_+1 on D4. did the same for D5 and got 0 no
reading at all, reverse the leads got.098_+1it seems that I have to replace
D5 but I dont have a schematic of the board I dont know the value of the diode or part # or were to buy it they are very small about less than a 1/8"
of a inch by 2/8" long they have a # 3197 on top( help on this ) about the
regulator do they have the #220 E3 on top end,? how do I check them, they
have for legs do I check them up and down or across the legs whid the power
on the board (help on this to.) and the vvc pad is that the small square on the bord nex to it.

[budm]

Re: manuel432

Just check the voltages at the pad as suggested in post10
"look at the VCC1.8V pad next to the regulator), the P12V and the VCC test pads"

[manuel432]

Re: manuel432

hi!!! had time to work on the t-com as per instruction I check as you said
the 12v pad check out good 12V . the regultor pad checks 1.8V. the us4 leg in 3.25V w/ground at the Tv frane, w/ ground at the base of the regulator is 1.45 V and the out of the regulator 1.8V.
Sorry I did not have time to work at all this weakend.
manuel432.