3310 - some keys dont work numbers 1,6,9,0 - GSM-Forum

simbirley · 01-29-2003, 12:44

As above some of the keys dont work on the keypad,

there is no corrosion or any water damaged on the phone.

the phone has had leds fitted but i cant see any damage from them.

when you press key 1 sometimes it brings up number 4 on the display.

does anybody know what this is and how to fix it,

i only have knowledge of reflowing, ledding, i cant resolder components on the board,

thanks for your time.

DrMobile · 01-29-2003, 12:48

Its a 70% MAD2 CPU problem or 10% chances Lines breaks to CPU.

Download service Manual from Landy page or compare Keys to other board.

Best Regards,
Wahab

ambot · 01-29-2003, 16:18

@simbirley:

try to flash phone with good or fresh PPM+MCU file... if still the same try to check or replace R414, R415 and V415... or do some continuity test between keys grouping...

keys outer circle:

Clear/1/4/7/* = in group and goes to R415 and pin 5 of V415
0/6/9/# = in group and goes to R414 and pin 4 of V415

if after some checking/replacing of components and problem still the same try to reflow or apply a minimal heat underneath (heat up on PCB) the mad... just be careful in heating up the mad...

simbirley · 01-29-2003, 16:21

Thanks for the information,

the software on the phone has not been tampered with so i dont think that is the problem,

How do i test the continuity between the keys ?

ambot · 01-29-2003, 16:38

@simberley:

just use your multimeter to check for the resistance between keys in group... keys in group must have zero resistance reading...

simbirley · 01-29-2003, 17:29

okay thanks i will check it,

if it is a problem with R414 or R415 then how do i fix it ? where can i buy replacements in the uk ?

hyper_wamir · 01-30-2003, 04:47

u can use parts from a dead 3310 unit...
gud luck!

wamir

01-29-2003, 12:44	#1 (permalink)
simbirley Freak Poster Join Date: Apr 2001 Posts: 353 Member: 4398 Status: Offline Thanks Meter: 1	3310 - some keys dont work numbers 1,6,9,0 As above some of the keys dont work on the keypad, there is no corrosion or any water damaged on the phone. the phone has had leds fitted but i cant see any damage from them. when you press key 1 sometimes it brings up number 4 on the display. does anybody know what this is and how to fix it, i only have knowledge of reflowing, ledding, i cant resolder components on the board, thanks for your time.

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01-29-2003, 12:48	#2 (permalink)
DrMobile No Life Poster Join Date: Aug 2001 Location: P A K I S T A N _____________ Age: 40 Posts: 3,579 Member: 5932 Status: Offline Thanks Meter: 1,694	Its a 70% MAD2 CPU problem or 10% chances Lines breaks to CPU. Download service Manual from Landy page or compare Keys to other board. Best Regards, Wahab

01-29-2003, 16:18	#3 (permalink)
ambot No Life Poster Join Date: Apr 2001 Location: Philippines Posts: 535 Member: 4274 Status: Offline Thanks Meter: 18	@simbirley: try to flash phone with good or fresh PPM+MCU file... if still the same try to check or replace R414, R415 and V415... or do some continuity test between keys grouping... keys outer circle: Clear/1/4/7/* = in group and goes to R415 and pin 5 of V415 0/6/9/# = in group and goes to R414 and pin 4 of V415 if after some checking/replacing of components and problem still the same try to reflow or apply a minimal heat underneath (heat up on PCB) the mad... just be careful in heating up the mad...

01-29-2003, 16:21	#4 (permalink)
simbirley Freak Poster Join Date: Apr 2001 Posts: 353 Member: 4398 Status: Offline Thanks Meter: 1	Thanks for the information, the software on the phone has not been tampered with so i dont think that is the problem, How do i test the continuity between the keys ?

01-29-2003, 16:38	#5 (permalink)
ambot No Life Poster Join Date: Apr 2001 Location: Philippines Posts: 535 Member: 4274 Status: Offline Thanks Meter: 18	@simberley: just use your multimeter to check for the resistance between keys in group... keys in group must have zero resistance reading...

01-29-2003, 17:29	#6 (permalink)
simbirley Freak Poster Join Date: Apr 2001 Posts: 353 Member: 4398 Status: Offline Thanks Meter: 1	okay thanks i will check it, if it is a problem with R414 or R415 then how do i fix it ? where can i buy replacements in the uk ?

01-30-2003, 04:47	#7 (permalink)
hyper_wamir Freak Poster Join Date: Feb 2002 Location: davao, philippines Age: 43 Posts: 247 Member: 9398 Status: Offline Thanks Meter: 1	u can use parts from a dead 3310 unit... gud luck! wamir