Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

[vinceroger69]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

maybe worth a read 5v is defently mentioned not sure if for standby though
https://www.badcaps.net/forum/showth...hlight=17IPS20
does the set fully boot if you freeze the eeprom/spi flash ics on the mainboard

[R_J]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

That post has a cleaner version of the schematic but all they do is take +12vcc through Q212 (base zenered) to get +5v Stby ( but shepp says q212 is not populated on this board)

[shepp]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

yes fully boots, maybe it has got 5v and I cant reach the pin on the plug to test it while its on, but I havent found any 5v signals on the top side while powering up, just reading the link......and been searching for a board for it but cheapest ones like £40

[vinceroger69]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

so your saying if you freeze the spi flash ics the set boots further and stays on longer?
i have some psu s in my spares boxes i will look through them tomorrow and see if i have one

[shepp]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

so your saying if you freeze the spi flash ics the set boots futher and stays on longer?
i have some psu s in my spares boxes i will look through them tomorrow and see if i have one

im not quite sure what you mean? I havent froze the spi flash ics....I havent got a clue what that is

but I am now checking U300 out and the surrounding components

[vinceroger69]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

if its a eeprom spi flash issue causing the reboots and freeze sometimes freezing the ics will make the set start up properly thats if it not a psu fault of course

[shepp]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

how do I freeze the ics?

[vinceroger69]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

what mainboard does this set use ? and i use air duster spray hold the can upside down and spray the ics not as good as proper electronics freeze spray from maplin etc but certainly cheaper

[shepp]

Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault

the main board is a 23292153, is the ICS located under the plastic cover? see attached