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MLA
Multi-Link Adapter (for 1600SW)
Opening a MLA from packaging:
The box had been opened before I got it. Whether it was used at some point or not I can't be certain but the MLA is certainly in excellent, like-new condition. The cardboard box for the power supply had been opened at some point, but the permanently attached cord could easily be in the factory twist ties. The manufacturer for that PSU is SYN Electronics Company, Ltd, whose model number is SYS2011-4012 Rev B, and has "SGI P/N 9350836" also on it's label. Output is listed as +12V at 3.33 amps.
There are three video cables included, and all cables bagged together appear to bear the SGI part number 013-3066-001. One cable is DVI-D male to DVI-D male, and the second is DVI-I male to HD15 male. The last cable is apparently a "DFP" cable - on one end it's DVI-D male, but on the other it looks like a half-width version of the LVDS connector used by the 1600SW and other components.
The MLA I bought was generating hissing noise from one of capacitors, and I saw distortion lines on the screen, replacing capacitors solved both issues. See below for details.
Repair
Reporting full success, the capacitors are: Sanyo OS-CON 6SVP220M and 16SVP100M, I had no trouble ordering perfectly matching ones from http://www.logic-d.net/ (Japanese), it cost me some 147 and 273 JPY respectively a piece (ordered 3 of each just in case). Datasheets (in Japanese) are here: http://www.edc.sanyo.com/pdf/oscon/J32_33.pdf (the form factor matching the ones from MLA is F8).
Replaced them just now and the monitor works flawlessly, no hissing noise, and no noise lines in the picture either.
Looking at the board closely, it seems it may be possible to mod the MLA to accept ordinary 5V (with enough current) and simply get rid of all those capacitors, voltage regulators etc. I'm pretty sure there's no special reason for those other than being able to use the same power supply as in 1600SW...
It also makes me wonder what is the second power socket for - it's not soldered anywhere, but I checked and the respective pins are short with the same pins in the working one... (for a moment I thought that may have been direct 5V input - but it doesn't seem so).
One important point - my cheapo (sparkfun) 30W soldering iron was not really able to melt the existing solder - it's very likely SGI used lead-free solder with some relatively high melting point (could be even 20C above ordinary). So even though my soldering works I will need to resolder them again with better iron to ensure good contact (I have Weller stashed somewhere in my office so this won't take long). Also, the original capacitors are soldered ALL THE WAY along the contact pins (underneath too), so depending on your iron you may simply end up ripping part of it away from the board - and with an ordinary soldering method you will not be able to resolder it in exact same way (unless you have SMD kit).. The original capacitors have this little (red in my case) glue which holds them during manufacturing process - this one can be scraped off easily with any sharp object, you don't really need to apply any new glue, but it is helpful if the capacitor doesn't move while you solder