That list will help. Nice find.
I've been spending some of my breaks looking for a VSA100 pinout. No luck so far.
(Bad back. I take back breaks. Helps that I am my own boss.)
I don't want to get your hopes up.
I could do this in my own shop with my tools but through the Internet with someone else's tools I'm not so confident.
Also my availability will be spotty. I've only been active on Vogons this time because I was convalescing from major surgery. At this point I'm convalesced and I'm way behind on everything. I was planning on bailing out of here for a while. Additionally I just found out one of my in-laws is going in for surgery for cancer so I may have to head out of state soon.
I will try to pop into this thread every day or two to see how you are doing.
Hopefully an actual video card guru will show up because, that I am not.
Caps getting a little warm is normal. Just means they are busy removing ripple.
If the heat seems too high check the PSU for excessive ripple.
R112 is +/-5% so should be 6.593 to 7.287 ohms.
Yes, it's the wrong part or bad and should be replaced in the course of things
It's early in the main power circuit so probably not the cause of your 3D only issues.
I looked at your photos again earlier and made some notes..
I didn't see as many POLs as I expected.
I think it's using resistor dividers to get the voltages they want from the card's main power.
MOSFETs and such would probably be labeled Q___ on that board.
More than one in a package might be Q___ or U___.
Q is a generic designation for transistor. (Which includes MOSFETs and others.)
U is a generic designation for IC chips. (Which are usually collections of transistors and other things.)
There is something that looks like it says P59
No idea about that one. Can you post the numbers on it?
There are several RN___
I think those are resistor networks. Please check one to verify that.
I have been tracking down the datasheets that might be needed on my breaks.
Whenever possible I find them for the exact original part instead of just the family.
IR (International Rectifier) is now Infineon.
Fairchild is now ON Semiconductor
I ran out of time finding the sheets. Haven't looked at them yet.
Please list the part numbers for those I missed and verify the ones I already found are correct.
I'm looking at photos, not a card. Your photos are good. My eyes, not so much.
Updates in yellow
U1 = CMD (California Micro Devices) PACVGA105Q = VGA Port Companion Circuit
http://pdf.datasheetcatalog.com/datasheet2/c/ … wzl4ku058py.pdf
U4 = NJA = ??
U6 = Fairchild VCX08 (74VCX08) = Logic Gates Quad 2-Input AND Gate
U7 = IDT QS3861Q = CMOS 10-BIT BUS Switch
http://pdf.datasheetcatalog.com/datasheet2/f/ … 9wk1q4590cy.pdf
U8 = Atmel AT49BV512-12JC = NOR Flash 512k (64kx8)
https://www.mouser.com/datasheet/2/268/atmel_ … -16-1180544.pdf
U12 = LTC1929CG = 2-Phase Synchronous Step-Down Switching Regulator (MOSFET Controller)
http://www.analog.com/media/en/technical-docu … heets/1929f.pdf
U13 = BMS = ??
AR1 = National Semiconductor LM358M = Dual Op Amp
Q1, Q2, Q3, Q4= IR IRF7811A = MOSFET N-CH 28V 11.4A 8-SOIC
Q5 = IR LR2703 = MOSFET 30V 1 N-CH HEXFET
https://www.mouser.com/datasheet/2/196/irlr27 … pbf-1228149.pdf
Please add any Q_ I missed.
You can look in the datasheets. Figure out which pins are in or out.
And track down where they go with continuity checks.
For DC in/out you should also check the voltages against the good card.
Make sure they are in the same condition (3D on/off) when you check.
There are TP___ all over the board. Those are "Test Points".
Take the voltages at the TP's and compare to the functional card.
Also compare in conditions with and without the 3D problem active.
That might give some clues where to look for problems.
== NOTE. Some of the TP's are probably for PWM or video signals. For those you can't check the intended TP parameter without an O'Scope but what DC is doing still might give clues. Some may not have a DC voltage at all.
Also with the cards powered down resistance (to ground) might give a clue.
After looking closer at the PCB I suspect the 12v and 5v from the cable conn. is being converted in parallel to 3.3v.
Q5 might be doing the same thing from slot (5v or 12v) power but I can't tell where it's pins go.
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