philips 65PUS6162/05 dead no sby led

[Maalobs]

Re: philips 65PUS6162/05 dead no sby led

To capture the serial-output of the boot log you need a serial-adapter tool like this:
https://thepihut.com/products/usb-to...r-raspberry-pi
When you plug in this device into your computer, it shows up as a new serial-port and you can then connect to the serial-port in the computer with a terminal-emulator like Tera Term or Putty.

You then hook up the headers of the serial-adapter to the correct pins on the device under test.
USB GND - to - DUT GND, obviously. (black)
USB RX - to - DUT TX, this is how you receive data from the DUT to your terminal window. (white)
USB TX - to - DUT RX, this allows you to transmit typed commands into the DUT. (green)
The red header you can ignore, it's for powering IoT devices.

This product with the blue case appears to be the real deal from Adafruit so it should have a brand controller in it which means the Windows driver will work with it.
If you find some alternative that's cheaper than this one, then it's probably built on a pirated controller chip and the Windows driver will detect that and refuse to work.
The pirated versions still work fine in Linux, though.

You will still have to mess around a bit with the speed setting in the terminal software, if you get garbage characters or just a single garbage character then you are probably set to the wrong speed and you should try some other speeds.
115200 and 57600 are a couple of likely choices, and keep the other settings at "8N1", meaning "8-bit, no parity, 1 stop bit", you will find this all under "port settings" or similar in the terminal software.

Just passively catching the boot log only requires hooking up the black and the white headers (GND and RX), but it sounds from Diah that you need to type some command, that means that you need to hook up the green header too (TX).

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

i will have to learn how to do boot capture
once i have this i will reply,
i tried to research regarding your earlier post on:
"stuck on half boot"
but could not find much information on this,
every day is a learning day

[Diah]

Re: philips 65PUS6162/05 dead no sby led

if you do boot log capture we can tell how to reset with command... but if there are no log its wasting time.

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

update :finally mosfet MTN127 KN3 arrived fitted replacement and sadly no change in symptoms dooh!!!
ive been trying to buy correct main board that matches the screen numbers:
:715g-8709 MOE B00 005N
SCREEN PANEL TPT650UA-QVN06U
none available so i thaught i would replace the scaler ic MT5802-VGET
but this ic is not listed anywhere
can anyone advise where i can buy this MT ic?
these chinese made boards have many versions,its so frustrating .
like a needle in a haystack.
after a lot of thaught
just wondered if theres a way of doing a hard reset to the scaler ic ,
as theres a 3 pin plug on main board
this reset may bring the micro back to life ? any ideas please

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

https://www.transistorfet.com/transi...N127KN3-0-T1-G

thanks will order today

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

https://alltransistors.com/

sadly this links to ali ex out of stock thanks for trying

[lotas]

Re: philips 65PUS6162/05 dead no sby led

https://www.transistorfet.com/transi...N127KN3-0-T1-G

[dskall]

Re: philips 65PUS6162/05 dead no sby led

https://alltransistors.com/

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

thaught i would try again with fresh head
i found the reason the backlight is not turned on
q8611 mosfet type MTN127 KN3 is oc
this allows u8601 the backlight driver ic to start when LVC-VSEN is fed to its gate

the bad news i cant source this mosfet anywhere not even the usual chinese suppliers
its a sot23 with built in prot diode 600v n chan cant find equivalent
has anybody any ideas where i may buy one please?

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

thanks for trying so hard to help
i dont know how to capture start log from UART on SM
ive been looking for correct board but at the moment only the smaller screen MB are available and im not sure if they will work as the screen panel type are different

[Diah]

Re: philips 65PUS6162/05 dead no sby led

heres the results;

it means Analog power circuit on MB are fine... but the digital are fault
2 ways u have now..
capture start log from UART port on S.M you have the sign of TX & RX to see where are the script stooped and give error..
or go direct reflew urs MTK chips before u are going to replace MB

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

heres the results;
pin1= .18v pin2=earth pin3=3.3v pin4 = 0v( on enable pin) pin 5=5v
without enable pin active no o/p to hdmi skt
surely the processor needs to turn on this ic with enable pin4? so no enable means no o/p?
i tried with usb stick and without

[Diah]

Re: philips 65PUS6162/05 dead no sby led

heres the jpg
i traced the 5v from u713 to u108 ic 54B3R
this lives in corner of board near to usb skt this ic i suspect is not turned on so no volts on usb skt
sorry image upside down even though it was uploaded correct way up

you need to plug in USB stick and do the messurments..
U108 recieve 5V on Pin5 and V out 5V on Pin1 if Pin1 <0 and the IC get warm mean you have short at some USB sockets. if its not geting warm mean IC are Open

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

heres the jpg
i traced the 5v from u713 to u108 ic 54B3R
this lives in corner of board near to usb skt this ic i suspect is not turned on so no volts on usb skt
sorry image upside down even though it was uploaded correct way up

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

there is 12.4v on d702
it feeds u713 8pin ic
that produces 5v on pin 1 u713

[Diah]

Re: philips 65PUS6162/05 dead no sby led

i understand the principle of testing psu stand alone,
but with this test all six pins on the 12v psu socket surely will read the same as they are connected together
should this test reveal 18v ?
ie with no load on psu?
you are right ,that on the MB the pins are separate 3,4,5,6, and 7,8

no, dont do the test of stand alone..when you have all 6 pins take same 12V even with PFC on.
locate D702 on MB we need to know why there are no 5V on USB ports

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

i understand the principle of testing psu stand alone,
but with this test all six pins on the 12v psu socket surely will read the same as they are connected together
should this test reveal 18v ?
ie with no load on psu?
you are right ,that on the MB the pins are separate 3,4,5,6, and 7,8

[Diah]

Re: philips 65PUS6162/05 dead no sby led

PIN 7/8 AU 12V this is always remain 12V like STB
PIN 3/4/5/6 PW18V_12V this go high after the PSU PFC goes high ( after PSU recieve PS_ON .

[Diah]

Re: philips 65PUS6162/05 dead no sby led

read my post #46 first.. and open page 48 onS.M to take look on MB socket ( system Power ) , on this socket 3-4-5-6 should have PW18V_12V after TV turn on.
PW18v_12V dosnt mean exactly shoild be 18V . but its range of main power DC will be bossted as much the MB need forexample speaker run on high vloume..etc,
we dont care now on howmuch... but we need to know if the PSU produce this PW18V_12V or not..
if not then you need to work on the PSU as stand alone to touble shooting it. if there are PW18V_12V on the MB socket 3-6 mean your PSU OK.

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

thank you Diah for your patience
just so im clear ,i should unplug MB and feed from 12v supply via a 2k resistor to ps -on
then measure voltage on 12v supply
all 6 pins of 12v supply are connected together so are you saying the 12v supply should rise up to 18v?