tv hisense 43" 2023

[pillola]

Greetings to all of you!

motherboard model RSAG7.820.12363/ROH
THE N901 CONTROL CHIP HAS BLOWN....SOT23 6 PIN!
Does anyone know what model this is?
searched everywhere for 2 days without finding anything.......
smd marked Vtb pB1 43 ????

[pillola]

Re: tv hisense 43" 2023

Greetings to all of you!

motherboard model RSAG7.820.12363/ROH
THE N901 CONTROL CHIP HAS BLOWN....SOT23 6 PIN!
Does anyone know what model this is?
searched everywhere for 2 days without finding anything.......
smd marked Vtb pB1 43 ???? [/ATTACH]

[Diah]

Re: tv hisense 43" 2023

are you kidding.... no need to draw diagram. show us with clear pictures of the parts. from top side and downside of the boards... its location will tell what its and for which purpose

[pillola]

Re: tv hisense 43" 2023

no I'm not joking.........I have already written the type of board above,,,,,,,I just want to know what type of SOT23-6 chip manages the primary of the transformer,, ,,,,,after that I have everything I need!!!!
:sculacciare:

[pillola]

Re: tv hisense 43" 2023

I found the electronic diagram on the motherboard,,,,,I just need to solder the right chip...so as not to make mistakes!!

[pillola]

Re: tv hisense 43" 2023

all the components that are mounted around the chip are all ok....from the mosfet, to the fast diodes, resistors and capacitances, but the chip is short circuited.......and I can't find exactly which model it is......must be a Chinese model similar to the ncp1251 as pinout

[lotas]

Re: tv hisense 43" 2023

N901 - ld5537b1gl

[pillola]

Re: tv hisense 43" 2023

thank you so much dear LOTAS...............now I can continue with more confidence!!!!!
have a nice days dear friend!!!!!!!!!!!!

[pillola]

Re: tv hisense 43" 2023

lotas ........you are a true friend !!!!
number1

[pillola]

Re: tv hisense 43" 2023

dear lotas while you're at it.. could you please send me the link where to get the complete mother board diagram?
thanks again !!!!

[lotas]

Re: tv hisense 43" 2023

But this circuit is from RSAG7.820.10360

[pillola]

Re: tv hisense 43" 2023

:gruppo:

[Davi.p]

Re: tv hisense 43" 2023

how do you know it is blown if you still read all the marking?
city: lecco
country: lecco
planet: lecco?
:-)

[pillola]

Re: tv hisense 43" 2023

[QUOTE=Davi.p;1284346]how do you know it is blown if you still read all the marking?

the switching does not start and the voltage on the vcc pin drops to around 0v, then measuring between vcc and ov pin, I detect resistance of around 5 ohm.......

[Davi.p]

Re: tv hisense 43" 2023

if you test it in circuit it could also be a condenser / zener between vcc-gnd...

[pillola]

let me do .......iìm the winner!!!

[pillola]

every thin g fine!!!

[pillola]

thanks so much to Lotas.... now smart tv work very well...and replace the old sambung plasma tv , of about 20 kg !!!!!!!!!
replace tl431,,pc817 optocoupler and ld5631 primary switching regulator !!!!!!!!!!!!!

[pillola]

ok !!!!!!!!!!!!!!!!!!!!!!

[lotas]

thanks so much to Lotas.... now smart tv work very well...and replace the old sambung plasma tv , of about 20 kg !!!!!!!!!
replace tl431,,pc817 optocoupler and ld5631 primary switching regulator !!!!!!!!!!!!!

Congratulations on your renovation!

[pillola]

I had to be patient for the chip....then I realized that the 12 volt was fluctuating.. and I had to change the 817 and to be safe, tl 431!!
happy Holidays!!!

[lotas]

Thank you! Happy holidays to you too! And with a working TV.