Philips plasma 42PF9631D/37 need some help

[mbates14]

I have this model that had the bad capacitors in the power supply. Replaced these capacitors and the TV worked fine. however, the picture looked like it was too wide and cut off on the right of the screen. no adjustment would fix this.

Decided to pull up the service menu, and the Display was set to 50" plasma. so it was a replaced SSB from a 50". i meant to type code 25 in that matches my panel, i screwed up and put in 23. saved it and now there is no picture.

I need this ComPair philips tool to fix it back, does anyone have this? or does anyone know which EEPROM this value is stored in so i can pull it, dump it, fix it back and re-write it?

Thanks.

[mbates14]

Re: Philips plasma 42PF9631D/37 need some help

if someone could take pictures of the service menu on one of these sets, that would help CONSIDERABLY in aide of me trying to get it set back. I cant remember how to navigate the menu so i cant do it blindfolded. hehe. TV still runs, no pic.

its 062596 INFO. then comes up with warning, press red button. i need a pic of this main display. and the service display, if you would please.

[mbates14]

Re: Philips plasma 42PF9631D/37 need some help

Dumped the eeprom, it appears to be in some kind of a convoluted algo. because code "23" doesnt stand out in eeprom anywhere. 23 hex or decimal. 23 hex to decimal is 35, i found 1 instance of that, changed to 37, made no difference, so that wasnt it.

any ideas? or does anyone have a board they could give me an EEP dump from?

[tmwalsh]

Re: Philips plasma 42PF9631D/37 need some help

Try looking for the ASCII characters - the values for "2" and "3" next to each other or how about 23 decimal to hex... 17 ??
Actually, I would have expected the values to be in a 'table', more or less sequentially in memory. Such that you would be able to find the values in a long string similar to what you saw displayed on the screen in service mode.
If you remember the series of entries, look for them next to each other. If you do a dump, or view, looking for 'strings', I would expect them to be near.
I assembled an EPROM programmer back when 2732's were new, but have no idea how you would read an eeprom, especially one that was surface mounted.
tom

[mbates14]

Re: Philips plasma 42PF9631D/37 need some help

i already pulled, made a jig, and dumped the eeprom. i didnt see anything anywhere that represented a 23. not in hex, not in decimal. nothing. not even in ascii. my guess they are using a scrambling algorithm.

I thoguht about filling the entire eeprom with 23, then booting the tV, monitoring the kernel on the service port. to see what it sees as a display code. then fill the eeprom with 33, and with 13, just to pinpoint its algorithm. If this doesnt change anything, then i know the display code is stored in a partition of the main flash.

[tmwalsh]

Re: Philips plasma 42PF9631D/37 need some help

EBCDIC? I haven't typed that word in so many years, I mis-spelled it...

Is it possible that the EEPROM contains the 'program' to display the service menu, receive service menu information from the source, and store the service menu information [settings] in a lookup table in the flash memory, as you suggested. In other words, there is no data in the EEPROM, just 'code'?
My last resort suggestion is to buy a board, with the correct values, open the service menu, and record every keypress [step] you take to navigate and change the offending value. Then install your board, reset the size figure, and sell the other board on ebay.
tom

[Wizard]

Re: Philips plasma 42PF9631D/37 need some help

8 pin is settings holding and customer' settings as well. If eeprom looks like 28 or 32 pin IC, that's not your IC as this is actual PROGRAM stored and not best to messed with.

Be careful, very often micro controller failed.

Cheers, Wizard

[mbates14]

Re: Philips plasma 42PF9631D/37 need some help

no no no. its definitely NOT the flash IC that i removed. it doesnt appear to contain any program information, im not a rookie. hehe. its a TSSOP packaged 8-pin 24C64. i had to make a jig to read out the ICs eeprom with a willem programmer.

the program is stored on a large TSSOP flash IC in the POD area which contains the JFFS2 file system and partitions. I havent touched this. Also, the microcontroller hasn't failed. its a simple case of writing in the wrong display affinity code. now i have to change it back. and its stored in the 24C64 eeprom somewhere...

When i head into the shop tomorrow, ill post up the EEPROM dump maybe someone might see something? thanks.

edit: as far as a table goes, i see an area in eeprom that kinda looks like a table setup, every so many bytes, you get EC EC 01 EC then some kind of data. then some 000s and then EC EC again.

[Wizard]

Re: Philips plasma 42PF9631D/37 need some help

This is in hex format. Most of time it is 0-255 range or less hence one or two hex each.

No rhyme to these, what's the problem?

Cheers, Wizard

[mbates14]

Re: Philips plasma 42PF9631D/37 need some help

Here is the eeprom dump. i found 17 in 3 spots, changed all 3 then 1 at a time, TV still wont produce the picture. so i dunno.