k750i joystick problem - GSM-Forum

rct-remote · 02-15-2007, 11:50

I have got a k750i with a non working joystick. I have tested it with a multi meter and it works fine. There is 0 voltage between the open contacts so it seems there is no power going to the contacts at all.

All the rest of the buttons work 100% on the keypad.

Nothing works on the joystick at all.

When the backlight turns off on the phone moving the joystick will not "wake" the backlight up again.

There are no 'click sounds' comming from the speaker when the joystick is moved.

I have inspected the board around the joystcik and there are no dry joints or sign of water damage.

I have re-flashed the firmware 2 times with XS++

Any advice on what to do next would be great.

..::Sunil::.. · 02-15-2007, 11:54

See this diagram :-

B.r.
Sunil.

rct-remote · 02-15-2007, 12:29

Thank you., I understand what I need to do. Starting work on it now. Will have results later

Thanks.

shahid Punjabi · 02-15-2007, 13:10

Quote:

Originally Posted by rct-remote

Thank you., I understand what I need to do. Starting work on it now. Will have results later

Thanks.

k750i joystick problem

rct-remote · 02-15-2007, 14:19

Quote:

Originally Posted by psunil

See this diagram :-

B.r.
Sunil.

I tried that. It still does not work.

..::Sunil::.. · 02-15-2007, 14:34

Change joystick if not ok see one more diagram for k750 jostick problem.
So many time I solved k750 joystick problem by this solution.

B.r.
Sunil.

rct-remote · 02-15-2007, 14:45

Quote:

Originally Posted by psunil

Change joystick if not ok see one more diagram for k750 jostick problem.
So many time I solved k750 joystick problem by this solution.

B.r.
Sunil.

Fixed. Bad joint on the pin at 12 o'clock in this picture

http://forum.gsmhosting.com/vbb/atta...0&d=1171546403

I tested between the pin at 12 o'clock and the pin at 9 o'clock at it field. I re-tested after touching it with fresh solder and it now works.

Thanks.

Amanda8140 · 02-16-2007, 22:07

of all the things in the world WD-40 must be the best. I have managed to get at least 4 different phones with bung joysticks to work with it. even when completely unresponsive. you just carefully move the joystick to one side add a little and do this all the way around (i have a sample wd-40 tube that works perfect but have heard of using a guitar pick of all things) then just keep moving it and then soak up what you can with a cotton bud and repeat about two more times. its like magic (c:

ebu mohammed-emin · 03-08-2007, 07:14

Quote:

Originally Posted by psunil

Change joystick if not ok see one more diagram for k750 jostick problem.
So many time I solved k750 joystick problem by this solution.

B.r.
Sunil.

thx alot

its very helpfull

ebu mohammed-emin

lamborghini · 03-08-2007, 11:24

pls check 4 diodes (between joystick and IC)

lamine · 03-09-2007, 13:59

Quote:

Originally Posted by psunil

Change joystick if not ok see one more diagram for k750 jostick problem.
So many time I solved k750 joystick problem by this solution.

B.r.
Sunil.

thank u my friend u are the king

MATRIX.REAL · 03-20-2007, 22:31

That's good ... thx a lot of thx

mobileprofessor · 03-24-2007, 11:36

than u man good work

lynx_ECE · 07-06-2007, 02:12

hi guys, need a help here..what will i do if the one of the diodes is not working?should i replace it?what specific diode will i use?

kafas512 · 03-02-2010, 16:43

thanksssssssssssssssssssssssssssss

02-15-2007, 11:50	#1 (permalink)
rct-remote Junior Member Join Date: Jan 2007 Posts: 18 Member: 441939 Status: Offline Thanks Meter: 1	k750i joystick problem I have got a k750i with a non working joystick. I have tested it with a multi meter and it works fine. There is 0 voltage between the open contacts so it seems there is no power going to the contacts at all. All the rest of the buttons work 100% on the keypad. Nothing works on the joystick at all. When the backlight turns off on the phone moving the joystick will not "wake" the backlight up again. There are no 'click sounds' comming from the speaker when the joystick is moved. I have inspected the board around the joystcik and there are no dry joints or sign of water damage. I have re-flashed the firmware 2 times with XS++ Any advice on what to do next would be great.

02-16-2007, 22:07	#8 (permalink)
Amanda8140 Junior Member Join Date: Mar 2006 Location: New Zealand Age: 43 Posts: 3 Member: 251644 Status: Offline Thanks Meter: 0	joystick of all the things in the world WD-40 must be the best. I have managed to get at least 4 different phones with bung joysticks to work with it. even when completely unresponsive. you just carefully move the joystick to one side add a little and do this all the way around (i have a sample wd-40 tube that works perfect but have heard of using a guitar pick of all things) then just keep moving it and then soak up what you can with a cotton bud and repeat about two more times. its like magic (c:

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02-15-2007, 12:29	#3 (permalink)
rct-remote Junior Member Join Date: Jan 2007 Posts: 18 Member: 441939 Status: Offline Thanks Meter: 1	Thank you., I understand what I need to do. Starting work on it now. Will have results later Thanks.

03-08-2007, 11:24	#10 (permalink)
lamborghini Freak Poster Join Date: Nov 2006 Posts: 155 Member: 388978 Status: Offline Thanks Meter: 88	pls check 4 diodes (between joystick and IC)

03-20-2007, 22:31	#12 (permalink)
MATRIX.REAL No Life Poster Join Date: Nov 2005 Location: MATRIX.REAL Posts: 1,511 Member: 202333 Status: Offline Thanks Meter: 178	That's good ... thx a lot of thx

03-24-2007, 11:36	#13 (permalink)
mobileprofessor Insane Poster Join Date: Apr 2006 Posts: 82 Member: 263159 Status: Offline Thanks Meter: 5	than u man good work

07-06-2007, 02:12	#14 (permalink)
lynx_ECE Junior Member Join Date: Jun 2007 Posts: 3 Member: 534618 Status: Offline Thanks Meter: 2	hi guys, need a help here..what will i do if the one of the diodes is not working?should i replace it?what specific diode will i use?

03-02-2010, 16:43	#15 (permalink)
kafas512 Junior Member Join Date: Sep 2008 Posts: 39 Member: 856695 Status: Offline Thanks Meter: 14	thanksssssssssssssssssssssssssssss