X460 keyboard - GSM-Forum

sjakie · 04-26-2005, 00:38

Hi, all.
Have X460 which keys dont work,.
Has a little waterdamage.

Removed mic, volume keys but no luck.
Anyone have service manual X460?

Thanks
Sjakie

GSM SNIPER · 04-26-2005, 15:16

@sjakie:

Give her z schemas for the keypad or at least photo for the keypad and I will send you the solution !
I haven(t a schemas or an X460 with me !

It's very easy !
try to out here the schemas of your keypad ! If you nead solution !

sjakie · 04-27-2005, 09:45

Hi, here picture off x460
Thanks
Sjakie

pepik · 04-27-2005, 10:15

After water damage are broken varistors.

I repaired one x450 /remove varistors from PCB/ and phone is working.

Varistor are placed nearly key pads.

See :
http://forum.gsmhosting.com/vbb/showthread.php?t=191354

sjakie · 04-27-2005, 19:42

Hi, i removed the 5 varistors as in x460 picture, but still
keyboard doesnt work

Regards
Sjakie

pepik · 04-27-2005, 21:31

Probably number of varistor for x460 is more /as for x450/ and maybe placed elsewhere on PCB.

See service manual for varistors ....

sjakie · 04-28-2005, 17:46

Hi, dont have service manual

regards
Sjakie

juht · 07-26-2005, 09:14

If it does not work, try mine solution

I tried also to remove those 5 varistors, but no result....
There's 5 more!
Remove all 5 varistors, then all is OK

Burnt Cobba · 09-06-2005, 17:50

this solution not working mate

removed all 10 and still no keys

is there some diodes to remove or replace pls? or IC?

thanks
al

Burnt Cobba · 09-06-2005, 21:41

solved my problem by reflowing the sections marked with a circle after removed the 10 varistors that did not solve my problem. See attachments.

Problem is that like an idiot i did not wait to see results but did 2 places at the same time.

Please someone check me out which is which maybe we get to a definite solution.

thanks
al

juht · 09-07-2005, 06:24

That means, you solved your problem without removing the varistors, just reflowing 2 areas?

I think this were the 1st step i think...

If reflowing does not help, then remove the varistors. But be carefull reflowing, samsung has main chips glued, and too hot air may kill the phone totally.

This info goes to them, who has in future such problems :P

Burnt Cobba · 09-08-2005, 17:29

@juht

unluckily yes i did remove the varistors first and problem remained. I did not try to reflow first

please anyone try reflowing first before removing varistors till we corner the solution.

thanks
al

TONYTONY · 11-02-2005, 15:33

JUST REMOVE ALL 10 VARISTORS INLCUDING V610 WHICH IS NEAR SIM CARD READER AND ALL WILL BE OK.

tonytony

sjakie · 11-03-2005, 10:34

Hi, Tony.
Any idea on E800, same problem?

regards
Sjakie

TONYTONY · 11-03-2005, 14:23

@sjakie

replace ZD301 with ZD302 for samsung e800 and all shoud be ok.

tonytony

04-26-2005, 00:38	#1 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	X460 keyboard Hi, all. Have X460 which keys dont work,. Has a little waterdamage. Removed mic, volume keys but no luck. Anyone have service manual X460? Thanks Sjakie

04-27-2005, 10:15	#4 (permalink)
pepik Freak Poster Join Date: Apr 2004 Location: Žilina Age: 45 Posts: 368 Member: 62102 Status: Offline Thanks Meter: 167	After water damage are broken varistors. I repaired one x450 /remove varistors from PCB/ and phone is working. Varistor are placed nearly key pads. See : http://forum.gsmhosting.com/vbb/showthread.php?t=191354 Last edited by pepik; 04-27-2005 at 21:33.

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04-26-2005, 15:16	#2 (permalink)
GSM SNIPER No Life Poster Join Date: Apr 2003 Location: Bled lekhla Posts: 2,295 Member: 27291 Status: Offline Thanks Meter: 81	@sjakie: Give her z schemas for the keypad or at least photo for the keypad and I will send you the solution ! I haven(t a schemas or an X460 with me ! It's very easy ! try to out here the schemas of your keypad ! If you nead solution !

04-27-2005, 19:42	#5 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	Hi, i removed the 5 varistors as in x460 picture, but still keyboard doesnt work Regards Sjakie

04-27-2005, 21:31	#6 (permalink)
pepik Freak Poster Join Date: Apr 2004 Location: Žilina Age: 45 Posts: 368 Member: 62102 Status: Offline Thanks Meter: 167	Probably number of varistor for x460 is more /as for x450/ and maybe placed elsewhere on PCB. See service manual for varistors ....

04-28-2005, 17:46	#7 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	Hi, dont have service manual regards Sjakie

09-06-2005, 17:50	#9 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	this solution not working mate removed all 10 and still no keys is there some diodes to remove or replace pls? or IC? thanks al

09-07-2005, 06:24	#11 (permalink)
juht Freak Poster Join Date: Sep 2001 Location: Estonia Age: 46 Posts: 315 Member: 6208 Status: Offline Thanks Meter: 12	That means, you solved your problem without removing the varistors, just reflowing 2 areas? I think this were the 1st step i think... If reflowing does not help, then remove the varistors. But be carefull reflowing, samsung has main chips glued, and too hot air may kill the phone totally. This info goes to them, who has in future such problems :P

09-08-2005, 17:29	#12 (permalink)
Burnt Cobba No Life Poster Join Date: Apr 2002 Location: The Green Mile Posts: 3,653 Member: 11325 Status: Offline Thanks Meter: 266	@juht unluckily yes i did remove the varistors first and problem remained. I did not try to reflow first please anyone try reflowing first before removing varistors till we corner the solution. thanks al

11-02-2005, 15:33	#13 (permalink)
TONYTONY No Life Poster Join Date: Jul 2003 Location: BahaMAS Age: 40 Posts: 557 Member: 35975 Status: Offline Thanks Meter: 19	JUST REMOVE ALL 10 VARISTORS INLCUDING V610 WHICH IS NEAR SIM CARD READER AND ALL WILL BE OK. tonytony

11-03-2005, 10:34	#14 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	Hi, Tony. Any idea on E800, same problem? regards Sjakie

11-03-2005, 14:23	#15 (permalink)
TONYTONY No Life Poster Join Date: Jul 2003 Location: BahaMAS Age: 40 Posts: 557 Member: 35975 Status: Offline Thanks Meter: 19	@sjakie replace ZD301 with ZD302 for samsung e800 and all shoud be ok. tonytony