Analog Stick going down even w/o analog ! (need help)

[cinki]

sorry for interrupting,i'm facing a huge problem..my psp analog stick moving down right even without analog stick inserted..i'm very sure the analog and the rubber were in very good condition..do anyone know how to fix this?tho mobo for sure..i've tried googling but nothing..urgent ! tq ppl

[laxboy]

check the pots on the side, thats what i belive is causing somthing like this but i cna t be sure.

[cinki]

which post sir?sorry,i'm new user,,not very familiar with this site..

[froggy]

Im Not Sure What He Ment, But I Think He Was Talking About The Four Points On The MotherBoard, The Square 1's

[laxboy]

pots=Potentiometer

[cinki]

that 4 copper point?it in good condition..i've swipe with alcohol but still same..it moving even without analog inserted..huhu...
Post Merge: April 23, 2010, 02:13:30 PManalog in good condition,i've tested it on other psp ang its working perfectly..the rubber also ok

[PspKicks316]

The analog stick DOES move when there's no physical stick there. It's to do with the resistance in the analog stick.
As for why it's moving when it's IN, I don't know.

[froggy]

no he is saying that, when there is no nub, it is moving on its own

[cinki]

if analog moving witout touching it,it might be bad contact between rubber and 4 copper  point..but now its moving without analog it happen when i'm doing touch screen mod using analog stick..but i dont soldered it direct to copper point,but i scratch a little under analog then jumper out with wire
Post Merge: April 24, 2010, 11:06:35 PMi found the solution,move SCEI 742KU63 ic..but can it be used back?like just reballing and rechipped it back?but i have no BGA ic plate for reballing that ic.. and i dont have any replacement for that ic..and from that pic,can anyone confirm that it can be done from ta-88v2 board??

[Arioch_76]

Hi if the analog psp stick Move down right when the stick isn't present is normal (it's done on all PSP without stick in place).
Now if you have scratch a pin on the modo you need to solder the stick to the mobo.

[cinki]

can u brief it widely sir? i did't scratch anything on mobo..can u upload image how to repair it
Post Merge: April 27, 2010, 08:49:36 PMi think the pinout did't recognise the analog..maybe 1 of the point is break..anyone have the pinout wiring for analog??i'm not really familiar with multimeter..hahahaaa
Post Merge: April 28, 2010, 09:46:05 AMi've blow that ic out..now just need to find bga plate reballing back..think same as mobile phone bga plate..huhu wish me luck..i cant send my psp to wetfusion because he not replying ms sms..maybe he buzy since he is about opening a shop about a month i think..huhu kinda scary coz i never try to reball psp ic before..i'am mobile technician..so i know what to do with ic..just need to find compstible bga plate and maybe ic if after reballing still same problem..wish me luck!
Post Merge: April 28, 2010, 08:11:26 PMstill same after reballing..maybe need to change it  i dont know what to do..

[Androxilogin]

I've been having the same problem with the endlessly drifting analog stick also. I've recently decided to pull out the old "broken" psp slim and mess with it again. Originally I got this one with the drifter for $30. The pads had been scraped off from the previous owner so thank you for directing me to the IC chip, I've searched everywhere for this info. From the right of the chip (towards where the pads were) I took a razor blade and slid it down. I plan to use it strictly with RemoteJoy, so this won't pose a problem. However, I got exaggerated at some point and decided to slide the razor down the left side of the chip. At one point it cut the power and left a very dim standby power led indicator so now I have my own stupidity to deal with here but I just wanted to throw out a "thanks", your research has been much appreciated.