Controllers Not Working

[Mike_01]

I have a v7 PS2 here and the controllers do not work. I have checked the controller unit and ribbon cable, which are fine, and have even tried replacing them with brand new ones out of a new PS2. The analog light will light up when the analog button is pressed. None of the buttons work on either controller port. Im fixing this for a friend, and he said only controller port 2 didnt work when he sent it, but when I got it both didnt work. I've double checked the ribbon cable clips and checked for continuity on all pins.

Does anyone have any suggestions on what the problem could be?

[Galgamo]

Hi,

I supossed you have checked it already, but if you dont, just check all the fuses to see if there is a blown one, and replace it if necessary.

Get the Fuses list and Images from FAQ


Good Luck!!

[Mike_01]

Yup, I checked the fuses. They are all fine.

[psxtools]

There are 2 X Diodes behind the USB Ports

Are both controller ports Non- functional?
Usualy only one controller port goes but if both are gone then replace both diodes and It will be fixed.

Classic problem also in older PSX Consoles e.g. 5502 & PSone

[Mike_01]

Only one was not functional ( or so he says) when he shipped it, but both were/are not functional when I got it. I just checked both diodes and they are fine, or so my multimeter says anyways. Do you know of any points I can check for continuity to see if its a broken track? The PS2 was modded before with a Magic and the guy who installed it did a hack job with some clips and scotch tape (yuck). If/when I get the controllers working ill be putting in a DMS3. I already removed the old mod and cleaned up everywhere and it checks out just fine, so just this damn controller issue now.

[Mike_01]

Can you (psxtools), or anyone else with a digital multimeter give me the readings on those diodes so I can make sure they are 100% working. I tested them onboard and got the usual slight voltage drop you get with diodes (about 0.6) forward, and instead of the usual open (1) I get backwords, I got 1.something which im guessing means its finding a path through the board, with some resistance of course.

Any help would be appreciated. I would hate to lose a good v7 over this.

[psxtools]

They both may test OK but replace them anyway

I have found they often read OK with the meter but are faulty

Top diode = Left Controller (Port 1)
Bottom Diode = Right Controller (Port 2)

[EnTiTy]

Originally posted by psxtools
They both may test OK but replace them anyway

I have found they often read OK with the meter but are faulty

Top diode = Left Controller (Port 1)
Bottom Diode = Right Controller (Port 2)

hmm always thought they controlled the usb you learn something new every day il remove one later to veryfy it
EnTiTy

[Mike_01]

OK, I guess ill replace one and see if it changes anything. But before I do.. Is there anything unique about these diodes, like do I need to get replacements off another v7 mainboard? Can I replace just the top one to see if the first controller works, or will I need to replace both to be sure?

Also, I dont have any tiny SMT diodes like that. Only ones I have are some big ones (about as thick as 18 awg wire). Would they work?

Sorry about so many questions, I just dont wanna take off a diode only to find I dont have a suitable replacement, hehe.

[Mike_01]

Also, there is a resistor just to the left of the diodes. Does anyone have the value of that resistor so I can check to see that its ok and not part of the problem?