First off...thanks volox for those great pictures and keen observations. In a way it's good that it's fw1003 since some parts numbers can be coordinated w/ the Service Manual (SM) which seems to not have been updated for many of the newer part numbers.
Also, I'm writing this immediately after viewing the pictures, and not taking into consideration the probable onslaught of subsequent owner comments
Volox has a 52" fw1003 panel BN07-OO447A=LTA520HC03
,52FHD 120HZ,10bit,5. verSQ01. This panel is
in the SM."The tech made a few comments while he was working on it... First, he commented that most LCDs only have 2 boards (1 power and 1 main) in them not 3. Second, he noted how the LCD has 2 sets of wires running to it; he said that most of the sets he has seen only have 1 set of wires running to the LCD. He wasn't sure if the two sets were because the LCD was larger or for some other reason."
REASON: Most LCD's are only 60Hz, our babies are 120Hz and the 120Hz FRC board seems to handle those functions, ergo the 3rd board.
The 120Hz panel is fed directly from the 120Hz FRC, via a T-CON interface, and Samsung has separated the 10bit LVDS(ODD) signal from the 10bit LVDS(EVEN) signal (one is 41 pin CN303, the other is 51 pin CN304)."Now before you all complain too much... No I am NOT going to pull the heat sync off those chips to see which ones they are."
COMMENTS: Too bad...how else can I see the part numbers?
It looks like those chips with the heat sinks are the main processors.
-The Main board consists of the (Trident) SVP-LX Video Decoder & Scaler...this may be the one in the center of the board, since it has 2 dedicated 166MHz memory chips (DDR 4Mx32) associated with it... see those black chips to the left where it says DIP..those look to be the same memory chips used on the FRC board.
Another main chip is the Audio Processor MSP4450K.
The third main chip is (what they call) a Lake, which looks to be a multifunction processor which is tied to the USB1.1 port, and fed by NIM Tuner w/Splitter (ANT1 + ANT2).
There looks to be another main chip FBE2 which is a direct LVDS interface between the SVP-LX and the 120Hz FRC board. That FBE2 looks to be the DNIe picture enhancer chip.
Maybe the more knowledgeable electronics gurus would want to expand upon this information.
Again, at this time I am not sure of where each processor is located."The 'main' board has the following stamped on the circuit board
Rev No: 2007.07.02
Code No: BN41-00904A
However the tech said it is identified by the part number that is on the sticker on the silver casing that the coax connectors come out of. That number is BN94-01432C........"
COMMENTS: That code number does agree w/the SM listing: BN94-01432C...ASSY PCB MAIN-AMLCD;LNT5271FX/*"So the tech was going to replace my main board. I got a look at the one he was going to install and saw that it was a BN94-01432J. Now if you look at the parts site the BN94-01432 board are all main board and the C and the J are both for the 52" but appear to be different somehow. The teal sticker on the new board appeared to indicate a 2002 firmware"
COMMENTS: that J board is not listed in the obviously outdated SM. The older boards have A for the 40", B for the 46" and C for the 52"."However here is where it gets real interesting... when he installed the new board and turned on the TV to test it, there was just a bunch of green horizontal lines that shifted to white once in a while. So I can only assume that there is some incompatibility between the two boards or between the firmware and the FRC board. So it would seem that if a replacement is needed for the main board the FRC board is going to have to be replaced at the same time - or - the main board will have to be flashed with firmware that matches the FRC board."
COMMENTS: Well thats not
but it looks like a good assumption.Too bad the tech didn't bring and install a Micronas FRC board first!....more on this below."The tech thought he might have a defective part. I told him I thought that maybe the two boards have to be replaced together. He said he would go back and research it and order another main board. So in the end I have the same board I initially had and still have stutter and am awaiting a call to find out how they intend to fix my TV."
COMMENTS: Well Volox at least you got to take some great pictures for us!
and look at all the education everybody is getting."The FRC board
Rev No: (2007.07.04)
Code No: BN41-00918A
Now if we look at the samsung parts site there is also a BN41-00918B but both list as no longer available; so let's not here a bunch of guesses about that."
COMMENTS:That FRC board is 120Hz FRC-IC with a heat sink covering it and with 2 dedicated memory chips 4Mx32...looks like the chips to the right of it in the picture. The FRC is the last Video stop on the way to the panel.
The SM does list a FRC BN41-00918A: PCB Main,FR-4,6,180*100 and a related FRCM BN41-00944A: PCB Sub-FRC PEONY FRC-M sub PCB,FR-4,4,1 . Can't locate the latter on schematics and both items listed as NA on the parts website.
I cannot tell from wiring diagrams weather the indicated FRCM schematics is for the newer Micronas board or for the aforementioned sub-FRC. HOWEVER
, and I reiterate the SM specifically states: "*FRCM: Micronas FRC Board- Peony model has two different FRC board
, one is Samsung FRC IC (basic model) the other is Micronas FRC IC(derivative model)".
There is absolutely NO indication of two different Main Boards....but then again..the SM hasn't been 100% accurate so far.