philips 65PUS6162/05 dead no sby led

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

i will try what you said but :
audio optic has 5v but is NOT lit red
i have no 12v on tcon
i will remove ribbon and wifi and see if 3.3v on usb1 increases to 5v
all the chips on MB are cold
i will post reply

[Diah]

Re: philips 65PUS6162/05 dead no sby led

what is this blue wire ?? is this DIY TV LOL..

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

at this case need more test on MB. you wrote USB1 was 3.3V which are low... however Audio OPTIC had 5V normal.. i would do the following and consider on the optic if lit or USB 1 become high 5V
a- panel complete disconnect from T-CON ( by disconnect ribbon )
b- messure 12V on T-CON
c- remove WIFI module from TV. or bluetooth . check if USB1 come high 5V
d- check after warm parts after you turn on the tv on MB..

im sorry
i made a mistake earlier when i measured for voltage on the usb socket
there is no voltage .
i was measuring on the wifi socket
measuring voltages on the underside of the main board
i made a mistake

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

what is this blue wire ?? is this DIY TV LOL..

the blue wire is where i took 3.3v to try to turn on the psu earlier

[Diah]

Re: philips 65PUS6162/05 dead no sby led

the blue wire is where i took 3.3v to try to turn on the psu earlier

this is wrong way for test.. because this 3.3V will return back to MB via PS_ON wire while the TV in sleep hope the MB didnt toasted..
so tell us which voltage you have on the MB. u said optic had 5V so this mean USB could have too.. u measure on the top side..and remark it on your early photo so we can understand where are the fault at MB could be.

[Diah]

Re: philips 65PUS6162/05 dead no sby led

BTW . let bring things in correct way.. this is yours Service manual.. on page 48. we can see the system power on the MB socket will be.

STB will be only 12V on pin 7 & 8 =AU 12V ( this remain 12V )
after the eeprom start script load will send the signal PS_ON from PIN 13.
then on PSU PFC go high and should produce 12V high 18V-12 inter MB socket on Pins 3/4/5/6 = PW_18V_12V.

PS_ON you said you have... so check the pins 3-6 on MB if they are high >12V. if not PSU problem. and this why no Panel VCC 12V on T-CON

[jimbofz]

Re: philips 65PUS6162/05 dead no sby led

on the underside of usb2 socket there are 9 contacts
two rows CN112
5 and 4
to the right of the black internet connection CN107
theres no voltage on any of these pins
see jpg
pins 3-6 i dont see any change in 12v it measures 12,4v
where does the 18v come from?

[Diah]

Re: philips 65PUS6162/05 dead no sby led

read my post above.. your PSU didnt give 18V_12V high on pins 3 4 5 6..
take yours PSU out on the table and run it as stand alone... from 12V with R2K !w JUMBER IT TO ps_on:: ps_oN WILL TAKE THE CURRENTS IT NEED 3.3V and it should produce other pins 18_12V high.. .

Be carfull.. you should know exactly the pins of AU_12V and PW_18V_12V on PSU socket

[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?

[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.

[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 .

[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

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

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

[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

[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 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 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

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

[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?