SAMSUNG PN51F5500AF 231v vs

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Picture of "sps-h115" ?

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

the 230 voltage on the low side of the octos might have something to do with this.

my board dose not have the ribbon connector in the center !

my sps- hi15 is pretty dark and i can barley read it,

i see you can buy these chips and they are part if the logic board circuit.

i can hire some one to flow a new one on but that may cost as much as a new one.

i can try myself but may screw it up beyond repair unless i had a re flow station

i see a BN96-22025A logic bard has same chips.

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Almost impossible to replace one of those chips yourself unless you have done it before, I would get a pro to do it, or get a new board.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

i can get a BN94-06194B for a 60 inch local apposed to my BN94-06194A.

i wonder if i can just change the aspect in service menu to make compatible?

its a shame samsung just had to integrate the boards together.

i found this thread on the test pattern pins and service manual.
https://www.badcaps.net/forum/showthread.php?t=61042

i shorted pins 3&4 and now i get a good test pattern but tv continues to reboot.

at first i shorted pins 3& 4 on the top right because i did not see the picture till sign in, hope that didnt cause any harm , might need a new on now.

possibly a bad bga , might just try to reflow or how to reset eprom

i found this video on resetting eprom so i might try it when the tv discharges a bit
https://www.youtube.com/watch?v=DZnlD24fMwM

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

You can't directly use 60" board in 51" set because the 60" uses different drive waveforms (Yrr and Yfr, ER, etc.) But you could try swapping the flash memory between the 51" and 60" boards, it's the small 8 pin device usually.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

there is 2 eprom chip's on the top of the main board under the black heat sink at the bottom right.

top one is a sda lower one is scl

i tried fowling the procedure on both by shorting the pins 5& 6 but nothing.

gotta charge flash light before i can get part numbers on the eprom.

im getting the 13 second reboot loop such as others i find on the internet

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

I would need a pic to tell you what is what

BTW for what it is worth I was playing with a D450 samsung plasma 43" 720p set and I got some interesting debug info out of the UART port including fault states, runtimes, power levels, etc. May be worth looking at your board to see if that is possible.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

I would need a pic to tell you what is what

BTW for what it is worth I was playing with a D450 samsung plasma 43" 720p set and I got some interesting debug info out of the UART port including fault states, runtimes, power levels, etc. May be worth looking at your board to see if that is possible.

a better pic than i can take of the main board is a couple post up , if you open it you can expand it really big.

i get no Samsung logo so it makes me lean towards bga issue or a power surge hit the tv and took out the eprom.

eprom -sda
winbond
25q40clsip

eprom- scl
atmlh318
2ec l b
2y3835a

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Is that the ShopJimmy link? I can't access ShopJimmy in the UK for some reason they block most European IPs (they said something about fraud before...seems like a bit of a knee jerk reaction)

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

you can use a vpn or proxy, best picture i can find.

try searching BN94-06194A on google then selecting tools, image size large

eproms have diffrent ways of being shorted this page below explains and i going to try to figure it out from pinouts.

i can find the windond 25q40 but not the exact atml831 but simlar.

https://wiki.samygo.tv/index.php/UnB...y_EEPROM_Reset

[dick_barton]

Re: SAMSUNG PN51F5500AF 231v vs

Is that the ShopJimmy link? I can't access ShopJimmy in the UK for some reason they block most European IPs (they said something about fraud before...seems like a bit of a knee jerk reaction)

I can understand not accepting orders but blocking access seems an odd thing to do.
I use "anonymoX" which will allow me access.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

there is set of holes and the ones next to winbond says uart.

the one's next to the atmlh831 says h reset and eprom ground but im not sure witch hole's are witch.


i tried continuity checker but i got something mind boggling!

hole 1 & 2 are na ,pins 7 & 8 go to hole 3 & gnd, hole 4 is na, hole 5 goes to ground and to pin 7 but not 8, 7& 8,1-4 go to hdmi ground , ground goes to pin 1-4

i'm thinking possibly a shorted eprom or circuit so i dont think reset will fix it now.

if i replace it i will have to program it and nedd to fin the program.

when i shorted pins 5&6 i did not power the set up .

i don't think the guy in the video i posted earlier knew what he was doing.

when i was reading unbricking a tv by eprom reset page it says to power on and hold for 20 seconds

i did not power up because that is what the guy did in the video with no success !

he did get the service menu to work but i don't have the original remote but one from a lcd that i am going to try.

the remote works for power on and off unlike the actual power button.

i tried info , menu, mute ,power then mute,1,8,2,power with no luck!

the smart remote is way different any may be another sequence.




How to hard reset eprom

For resetting TV, settings, you needed to remove SoC EEPROM device from TV. But it's not required. In electronic world, if you disable communication of the chip, it counts as removed. So we just needed to kill communication of SoC EEPROM. EEPROMs on Samsung TV's communicating via common i2c protocol. That protocol carries data via SDA line and send clocks via SCL line. In our situation, both blocking SCL or SDA will works. But I decide SDA.

To do this, all you have to do that feeding (connecting) GND (ground) or VCC (3.3v) to SDA line with little wire... That's all. Since this lines are HIGH (v3.3) in IDLE, its better to hold it via VCC. You can also hold this lines via GND too. But don't try to connect both GND and VCC. It will be short circuit and probably will damage your board.

Join VCC and SDA, power on TV and hold about for 20 seconds with the TV powered. It just try to read (wrong) settings from EEPROM, since it cannot read anything (refer to the warning message bellow), just start with defaults. That is what we want. Than releasing SDA line and shutting TV off will update the settings on EEPROM with null values, that TV could boot with it. After all, you can enter service menu and change the required changes.

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Just upload the picture here please I'm not going to go faffing around with VPNs to find a picture just to give you help.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

got to have fun this morning with the camera on the lg g4, i also saved and up loaded shop jimmy !

i tried getting the best shot of the part numbers

don't think of it as just helping me but any person who comes accross this.

there is these other main board eprom repairs and possibly we can start one.

if i have to i will buy another main board and extract the eprom to try to repair this one then upload it for the community.


thank's,
bman4

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

after poking around to find abnormality's i found that there is a corrsion / white substance that was bridging connections on the atmlh eprom, scraping it away did not fix all the pins to ground. i really think i have a shorted eprom or circut and my next step would be to pull it off to test,the solder joints look bad anyways.

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Normal for several pins on that device to be at ground.

Worth checking CN9999 next to the processor on the left. Might be a test pattern jumper. Try jumpering it with a 100 ohm resistor (just in case it's not this will limit current).

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

i will try to look for CN9999 but don't think there is one.

the 4 big holes at the top left at zcn2014_ld are the control board test pattern pins.


shorted 3&4 with just a wire and stated in a post earlier that i got a good pattern but continued to reboot loop.

i think pins 6 and 8 of atmlh need to be shorted while powering set on for 20sec.

there is also h reset pin but what method should i use and how.

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Just to the bottom left of SDP1005 chip but you found holes anyway

So that proves that fault is with main board as control board part can gen patterns. Replace main with correct size board.

Note these sets do not have the corrupt EEPROM issue so pins shorted will probably not fix it.

[bman4]

Re: SAMSUNG PN51F5500AF 231v vs

i tried a reflow then shorting of the pins with no luck.

i get 3.3 at pins 6 and 8 on atmlh eprom but i also get continuity to ground on the 1-4 7&8th pin.

the only culprit could be a short on the board or the eprom.

the chip under the heat sink get's no warmth when powered witch is a dnle chip.

be a shame to give up if its easily fixable.

[tom66]

Re: SAMSUNG PN51F5500AF 231v vs

Most likely culprit is corrupted memory .. not shorted parts, very very rare.
Corrupted flash memory because it wears out over time and if you don't have the firmware nothing you can do about it.
Other problems do happen but 99% of the time it's corrupted flash.