china keypad problame - GSM-Forum

rcpabari · 07-10-2008, 16:59

sir i have chinamobile flaying f903 mobile in left,right up down and centre key dose not working so pls help me

**tkowsar** · 07-10-2008, 17:20

future post details about your phone.

and now

though your keypad is flex or socket system, check flex cable or socket continuously for pcb to keypad.

though your keypad direct on pcb, first try to clean though not solve last try is re-hot cpu carefully with your won risk because key line direct going under cpu for 99% china MTK cpu phone.

though your phone not mtk cpu, post details about your phone i will try for u.

hajipur · 07-10-2008, 18:25

some chinese Phone is Keypad ic & Rehot this IC

rcpabari · 07-11-2008, 01:57

thank u tkswor and hajipur this is flex cable in keypad

**tkowsar** · 07-11-2008, 05:16

Quote:

Originally Posted by rcpabari

thank u tkswor and hajipur this is flex cable in keypad

good, so try and post result.

though like my post, only click "thanks" button.

yurais · 11-08-2011, 06:23

excuse my ignorance but, what temperature would you use to re-hot CPU? and how long time? which Air speed? and do you heat the PCB first with different/lower temperature? or you apply the heat straight directly to the CPU ?
Do you apply flux to the cpu for the re-hot task?

07-10-2008, 16:59	#1 (permalink)
rcpabari Crazy Poster Join Date: Jun 2005 Age: 44 Posts: 56 Member: 156354 Status: Offline Thanks Meter: 14	china keypad problame sir i have chinamobile flaying f903 mobile in left,right up down and centre key dose not working so pls help me

07-11-2008, 01:57	#4 (permalink)
rcpabari Crazy Poster Join Date: Jun 2005 Age: 44 Posts: 56 Member: 156354 Status: Offline Thanks Meter: 14	thank u thank u tkswor and hajipur this is flex cable in keypad

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07-10-2008, 17:20	#2 (permalink)
tkowsar Moderator Join Date: Feb 2006 Location: Bangladesh & Bahrain Posts: 3,165 Member: 233205 Status: Offline Thanks Meter: 5,014	future post details about your phone. and now though your keypad is flex or socket system, check flex cable or socket continuously for pcb to keypad. though your keypad direct on pcb, first try to clean though not solve last try is re-hot cpu carefully with your won risk because key line direct going under cpu for 99% china MTK cpu phone. though your phone not mtk cpu, post details about your phone i will try for u.

07-10-2008, 18:25	#3 (permalink)
hajipur Insane Poster Join Date: Oct 2007 Posts: 77 Member: 614097 Status: Offline Thanks Meter: 24	some chinese Phone is Keypad ic & Rehot this IC

11-08-2011, 06:23	#6 (permalink)
yurais No Life Poster Join Date: Jan 2006 Location: Santiago de Cuba Age: 46 Posts: 3,672 Member: 220595 Status: Offline Thanks Meter: 355	excuse my ignorance but, what temperature would you use to re-hot CPU? and how long time? which Air speed? and do you heat the PCB first with different/lower temperature? or you apply the heat straight directly to the CPU ? Do you apply flux to the cpu for the re-hot task?