intergrated tcon board ic rt6939 vestel polaroid p55up0277a

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

for this cheap sets / mainboards don't have extra video processing ICs also usually all signal come from Main IC direct via LVDS to the panel.

if you could upload focused photos on the main boards and the LVDS sockets from up and down side if there any remark on the pins.

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

hi did you trace the source of the enable voltage from the main board? as Diah
sugested ?
ive studied the circuit and cant see where the enable comes from
can you help? thanks

Diah misunderstands me. Your panel is short circuited. I replace this ic but still not working. I send tv to panel repair workplace and they replace cofs.

https://yadi.sk/i/_6VKMJQ4rQYiAA This is circuit diagram of mb120.

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Diah misunderstands me. Your panel is short circuited. I replace this ic but still not working. I send tv to panel repair workplace and they replace cofs.

https://yadi.sk/i/_6VKMJQ4rQYiAA This is circuit diagram of mb120.

i see,,, so you have DC to DC correct working before replace COF.

the signal which come from main boards via R440 100R connect to lvds socket pin30

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

for this cheap sets / mainboards don't have extra video processing ICs also usually all signal come from Main IC direct via LVDS to the panel.

if you could upload focused photos on the main boards and the LVDS sockets from up and down side if there any remark on the pins.

heres the pics ,
ive studied cct vbyone/lvds options
and found r440 shown as : L dim en pin 22
on the main board socket for lvds pin 22 is earth
and pin 30 doesnt appear to have any connections to it ?
after removing main board and tracing pin 30 ?
i must be missing something

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

Diah misunderstands me. Your panel is short circuited. I replace this ic but still not working. I send tv to panel repair workplace and they replace cofs.

https://yadi.sk/i/_6VKMJQ4rQYiAA This is circuit diagram of mb120.

i didnt realise that it was possible to replace cofs

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

heres the pics ,
ive studied cct vbyone/lvds options
and found r440 shown as : L dim en pin 22
on the main board socket for lvds pin 22 is earth
and pin 30 doesnt appear to have any connections to it ?
after removing main board and tracing pin 30 ?
i must be missing something

could you locate on boards the U12 the MFC SPI 4Mb ?

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

this set had 2 SPI U13 for MBOOT. at your case its function... and the other U12 for MFC this is i do suspected.. MFC the displaying of picture.. normally the SW of vestel before we do have 3 parts 1-MBOOT.bin 2-MFC.bin & 3-opertion firmware. if MFC corrupted no display as yours condition.

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

on my 17mb120 theres a u11 and a u13 ,but no u 12?
but on the circuit diagram u 12 ie shown.

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

i see,,, so you have DC to DC correct working before replace COF.

the signal which come from main boards via R440 100R connect to lvds socket pin30

Yes. Tvs all functions working correctly jus missing same panel pcb voltages.

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

on my 17mb120 theres a u11 and a u13 ,but no u 12?
but on the circuit diagram u 12 ie shown.

are you sure ? on the downside did you check too.. look on number of it in schematic and look after all SPI with 8 pins

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

on my 17mb120 theres a u11 and a u13 ,but no u 12?
but on the circuit diagram u 12 ie shown.

U12 is spi of U14. Your chassis have single lvds option and don't have U14.
I insist on cof failure.

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

U12 is spi of U14. Your chassis have single lvds option and don't have U14.
I insist on cof failure.

arizanotlari... the schematic you upload here are for ONE CHANNEL LVDS. as the set of OP. MFC SPI U13 not U14..
do you have recovery firmware of this set with 3 files???
i have MFC.bin used by vestel such 246009 & 240226 which used over most vestel.

[arizanotlari]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

arizanotlari... the schematic you upload here are for ONE CHANNEL LVDS. as the set of OP. MFC SPI U13 not U14..
do you have recovery firmware of this set with 3 files???
i have MFC.bin used by vestel such 246009 & 240226 which used over most vestel.

if you check page 14 of document you can see 1&2 lvds options. U13 is Mboot SPI not MFC.
U14 is position code of MFC ic.

Vestel dont allow access to firmware of export products. I have full firmware of
QNDS2DN12 panel : https://yadi.sk/d/QyY2xVD8ghxQYw

all my respect.

[jimbofz]

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

[Diah]

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

are you sure this label related to Panel Type ? not BL strings Type?

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

this is the label from inside tv

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

this is the label from inside tv

okay.. i am little confused.. where are yours MFC SPI ?
can you tell how many SPI you have on boards .. 8pins with label No had part on it 25L ?

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

okay.. i am little confused.. where are yours MFC SPI ?
can you tell how many SPI you have on boards .. 8pins with label No had part on it 25L ?

here are some pics of main board hope it helps thanks

[Diah]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

good work... so U11 yours MFC SPI.. do you have programmer CH341A ?

[jimbofz]

Re: intergrated tcon board ic rt6939 vestel polaroid p55up0277a

good work... so U11 yours MFC SPI.. do you have programmer CH341A ?

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