intergrated tcon board ic rt6939 vestel polaroid p55up0277a

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

sorry i do not have a CH341A ,
should i put it on my Christmas list?

its cheap and useful,
about U11 check first all V. on its pins , then try freeze it or heat before you turn on the set.

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

sorry been away from pc .
does the last post from arizanotlari contain the correct firmware for my tv?
if yes can i install this via usb ,
considering i have no on screen graphics to enter correct menu
my panel type:ves550qnds 2d u12

Try it.

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

its cheap and useful,
about U11 check first all V. on its pins , then try freeze it or heat before you turn on the set.

heres the voltages on U11 :
1 3.38v, 2 3.38v, 3 3.4v ,4 0v,
5 ov, 6 3.38v 7 3.26v, 8 3.26v
no change with heat or freeze before turning on,tried a few times ,no change

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

heres the voltages on U11 :
1 3.38v, 2 3.38v, 3 3.4v ,4 0v,
5 ov, 6 3.38v 7 3.26v, 8 3.26v
no change with heat or freeze before turning on,tried a few times ,no change

compare the V. with U13

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

heres voltages from u13:
1 3.25v, 2 3.2v, 3 0v, 4 0v,
5 0v, 6 0v, 7 3.1v, 8 3.1v .
so no volts on pin 3 and pin6 compared to u11

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

heres voltages from u13:
1 3.25v, 2 3.2v, 3 0v, 4 0v,
5 0v, 6 0v, 7 3.1v, 8 3.1v .
so no volts on pin 3 and pin6 compared to u11

are you sure the info you wrote on yours photo below are 100% correct, both SPI had same No.25L1606E ?

try the firmware from Arıza Notları
while the tv ON, plug it from wall socket.. put all files on usb drive and insert it at any usb ports, press OK on the RC and keep pressing while you plug the tv in wall socket again... hope your screen will show progress

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

do the 3 files have to be in a folder,
or do i load them on to usb
as 3 separate items?
ive double checked the voltages on U11 and U13
and as you say i would expect them to be the same?

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

do the 3 files have to be in a folder,
or do i load them on to usb
as 3 separate items?
ive double checked the voltages on U11 and U13
and as you say i would expect them to be the same?

all files on the root of the usb drive

about SPI.. my bad english.. i am asking if the both SPI lable are the same as you wrote 25L1606E on the paper

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

thanks your english is very good much better than my german
both SPI are the same 25L1606E.
i have downloaded and extracted the files ,
do they have to be in a folder or do i create a folder ? put the files in then send to usb?

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

thanks your english is very good much better than my german
both SPI are the same 25L1606E.
i have downloaded and extracted the files ,
do they have to be in a folder or do i create a folder ? put the files in then send to usb?

i did answer before... no folder just all files copy them on the usb root LOL

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

do the 3 files have to be in a folder,
or do i load them on to usb
as 3 separate items?
ive double checked the voltages on U11 and U13
and as you say i would expect them to be the same?

Extract 4 files to USB (file sytem of usb drive must be fat32)
Plug USB Drive to USB 1 port of tv.
Press and hold OK button from rc and plug in ac cable.
Hold OK button until led blinking fast.

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Extract 4 files to USB (file sytem of usb drive must be fat32)
Plug USB Drive to USB 1 port of tv.
Press and hold OK button from rc and plug in ac cable.
Hold OK button until led blinking fast.

theres 3 usb skts, one is blue usb3.

the other 2 are not marked
looked on back cover and on pcb
i tried the usb next to the scart skt and followed your instructions
holding down OK button waited 5 minutes no fast blinking
so powered off and tried the side usb ,no change
only now when i removed the usb and powered on i cant get sound from scart i/p which i had before so now im confused
just looked on cct there labelled side usb, back usb, and usb3 which is the correct one?

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Usb 1 is cn16.
Unplug lvds cable and try again.

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Usb 1 is cn16.
Unplug lvds cable and try again.

ok tried with lvds cable disconected
using the usb next to the scart skt which is cn16
when fast blinking pauses
i remove power
reinstall the lvds and unplug usb
tv will come in and out of sby as before,
but cant get any sound via scart i/p
and pic just the same as before no osg or pic info

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

ok back to basics when the main board is working normally
it provides a enable voltage to turn on the dc/dc converter ics
on the intergrated tcon board .
now after trying to install the f/w
we still have no enable voltage on pin 22 or 30 of the lvds
neither of these pins are s/c or low resistance to deck .
if i could find out which is the enable pin in the two ics RT6939 AND RT6935 these ics are made by RICHTEC and their website has info on hundreds of ics that they make except the ones used in this vestel panel.
i may have to wait until i can compare with a working vestel

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

After upgrade led must go off.
If tv going to standby mode chassis is not working.
You write u13 voltages before, this voltage values showing tv is standby mode.
first make sure the tv is working.

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

After upgrade led must go off.
If tv going to standby mode chassis is not working.
You write u13 voltages before, this voltage values showing tv is standby mode.
first make sure the tv is working.

i know the voltage is strange ,
i dont understand why ,
but tv was definately on when voltages were measured ,
as the backlight was lit and i had sound via scart i/p.
but i now have no sound ?
i will try the upgrade f.w again tomorrow

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

i know the voltage is strange ,
i dont understand why ,
but tv was definately on when voltages were measured ,
as the backlight was lit and i had sound via scart i/p.
but i now have no sound ?
i will try the upgrade f.w again tomorrow

tried again f/w update when fast blinking finally stops waited until backlight came on and red led went out.
them unplugged mains ,removed usb stick and powered up.
tv comes on as before (dark blue image backlight on)
but now with no sound via scart i/p
so i checked the voltages on u13 again
and pin 3 has no volts ,on cct its shown as write protection .
pin 6 also has no volts shown on cct as sclk clock
any ideas ? should i try to buy a main board ?

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

tried again f/w update when fast blinking finally stops waited until backlight came on and red led went out.
them unplugged mains ,removed usb stick and powered up.
tv comes on as before (dark blue image backlight on)
but now with no sound via scart i/p
so i checked the voltages on u13 again
and pin 3 has no volts ,on cct its shown as write protection .
pin 6 also has no volts shown on cct as sclk clock
any ideas ? should i try to buy a main board ?

since you dont have programmer tools so nothings you can do.. , i would encourage you buy replacement MB as it show at your country Ebay cheap so you can invest at it..

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Can you add photos of screen.