Please help support the site by donating at the link below.https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8ZRU34U47BESW
You're looking for LSC, Left Stick Click. Top side of the board, make sure R16 is there, 33ohm. After that it goes to TP42 (bottom side) and after that it's off to the MCU board where it may or may not go thru another Resistor before getting to the actual chip.
With the stick removed the Analog line could do any number of things. LSY stuck up sounds like the LSY line is either grounded somewhere or there is no 1.8v on the LSY POT.C37 missing isn't going to cause any real issues.
It's one of the 4 steering diodes there for the USB data lines. It will work without it, but if you're going to be plugging up the USB cable to it then it would be best to replace it. No idea what the exact specs are, best to get a replacement from another controller board.
That trace is the RSY line, it just runs under the expansion port. C23 is just a decoupling cap on that line, you'll never really notice it missing. It's 10nF, 0201 size, anything 4v or more will work if you want to replace it.
Guys, I have a question.. I brought a faulty with an attempt to repair it. The problem is that Left Stick always point up when power on even after i remove the left stick from the PCB, it still point up when i test with gamepad tester. Anyway to test what the cause of it?BTW, i also accidently remove the cap on C37, will it affect anything?Thanks in advance.
C5, C14 and C15 are all not installed. C20 missing would cause no noticeable issues. It's most likely something between 1nF to 1000nF if you want to put something in there, really isn't going to matter at all as it's just one of several decoupling caps on the 1.8v rail for the Analog sticks.
With the stick removed the Analog lines are floating and will do all kinds of weird things. Look for broken traces and pads where the stick gets soldered. If any of those are intermittent or open you'll have issues.