2100 keypad LEDs don't still lighting - GSM-Forum

GSM SNIPER · 07-02-2004, 12:03

the phone was droped on the ground !
I rehot the PCB and clean It I arrived to revive It .
The phone workes but the keypad LEDs sill lighting .
What can be the problem please ?

~:Sujyot GSM Zone:~ · 07-02-2004, 12:33

put a jumper from display led to keypad led

GSM SNIPER · 07-02-2004, 18:21

Quote:

Originally Posted by founderrfd

put a jumper from display led to keypad led

Did you explaine more that !
I said that the Keypad LEDS still lighting for all the time .

Trion · 07-02-2004, 18:55

The ringer n LED controller IC may be bad. Try changin it.

Unggul · 07-02-2004, 21:03

try to change the UI_IC's, but before you change it, it will good if you lookin the resistor in the round of the UI_IC's, because it will be more safety. thx

~~~~~~~~~~~~~ Unggul ~~~~~~~~~~~~~~~~~~
############# INDONESIA ###################

btl · 07-02-2004, 21:48

i have same problem amstill unable to solve them i changed the ringer/light vibrator ic no success

GSM SNIPER · 07-03-2004, 21:19

I will test the keypad IC and replay .thans !

keany · 07-06-2004, 10:15

try to change ui module 100% tested

GSM SNIPER · 07-06-2004, 11:30

Quote:

Originally Posted by keany

try to change ui module 100% tested

Whati's this UI module please ! where on the board ?

Trion · 07-06-2004, 19:29

Here's where u can get service manuals:http://web218.bces-3040.de/nokia/flash_unlock.php . Download the manual and learn which Ic controls the LEDs, keypad, ringer and buzzer. Change it. This ic is also called UI(user interface) IC. Please don't waste time any more time asking where this IC is. If after changing still u have probs u can ask for more hints. Post the results here.

GSM SNIPER · 07-07-2004, 13:50

Quote:

Originally Posted by Trion

Here's where u can get service manuals:http://web218.bces-3040.de/nokia/flash_unlock.php . Download the manual and learn which Ic controls the LEDs, keypad, ringer and buzzer. Change it. This ic is also called UI(user interface) IC. Please don't waste time any more time asking where this IC is. If after changing still u have probs u can ask for more hints. Post the results here.

I have changed the Ui from an other board and It's all ok thank you very much !!

b0ba · 07-07-2004, 20:26

KBD leds are controlled by the same IC as keboard leds,I don't remeber it's name and number.
But it have two inputs and two oitputs. Inputs are enable lcd light and enable keyboard light.
It also have two inputs (LCD and KBD) current adjast. If one of these (current setting) resistor is damaged then you will recieve no light.
There are also protective resistors... They can also be faulty.

Unggul · 07-07-2004, 22:39

Quote:

Originally Posted by azampk

don't chek chang keypad ic man
************Azam******************

checking the IC's is the best tricks to repair the phone, so what do you do if the IC's changed but the problem can't solve??????????????????????????????
It means probably the resistor arround the UI Ic's is bad or lost. So checking is the best way man...!!!
In the Service manual book there isn't shown what do you do "KEY PAD IC"!!!
Please be a professional man...!!!!!!!

Trion · 07-08-2004, 18:51

Its true that resistors can get damaged, but in most cases changing the IC solves the prob.

07-02-2004, 12:03	#1 (permalink)
GSM SNIPER No Life Poster Join Date: Apr 2003 Location: Bled lekhla Posts: 2,295 Member: 27291 Status: Offline Thanks Meter: 81	2100 keypad LEDs still lighting the phone was droped on the ground ! I rehot the PCB and clean It I arrived to revive It . The phone workes but the keypad LEDs sill lighting . What can be the problem please ? Last edited by GSM SNIPER; 07-02-2004 at 18:16.

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07-02-2004, 12:33	#2 (permalink)
~:Sujyot GSM Zone:~ No Life Poster Join Date: Jan 2004 Location: Jodhpur India Posts: 1,797 Member: 48238 Status: Offline Sonork: 100.54361 Thanks Meter: 397	put a jumper from display led to keypad led

07-02-2004, 18:55	#4 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	The ringer n LED controller IC may be bad. Try changin it.

07-02-2004, 21:03	#5 (permalink)
Unggul No Life Poster Join Date: Jul 2004 Location: Bandung - West Java, Indonesia Age: 43 Posts: 501 Member: 71273 Status: Offline Thanks Meter: 14	try to change the UI_IC's, but before you change it, it will good if you lookin the resistor in the round of the UI_IC's, because it will be more safety. thx ~~~~~~~~~~~~~ Unggul ~~~~~~~~~~~~~~~~~~ ############# INDONESIA ###################

07-02-2004, 21:48	#6 (permalink)
btl Banned Join Date: Jan 2004 Age: 32 Posts: 1,319 Member: 50389 Status: Offline Thanks Meter: 36	i have same problem amstill unable to solve them i changed the ringer/light vibrator ic no success

07-03-2004, 21:19	#7 (permalink)
GSM SNIPER No Life Poster Join Date: Apr 2003 Location: Bled lekhla Posts: 2,295 Member: 27291 Status: Offline Thanks Meter: 81	I will test the keypad IC and replay .thans !

07-06-2004, 10:15	#8 (permalink)
keany No Life Poster Join Date: May 2004 Location: gsm-land Age: 45 Posts: 755 Member: 67419 Status: Offline Thanks Meter: 237	try to change ui module 100% tested

07-06-2004, 19:29	#10 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	Here's where u can get service manuals:http://web218.bces-3040.de/nokia/flash_unlock.php . Download the manual and learn which Ic controls the LEDs, keypad, ringer and buzzer. Change it. This ic is also called UI(user interface) IC. Please don't waste time any more time asking where this IC is. If after changing still u have probs u can ask for more hints. Post the results here.

07-07-2004, 20:26	#12 (permalink)
b0ba No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 44 Posts: 895 Member: 6772 Status: Offline Thanks Meter: 17	KBD leds are controlled by the same IC as keboard leds,I don't remeber it's name and number. But it have two inputs and two oitputs. Inputs are enable lcd light and enable keyboard light. It also have two inputs (LCD and KBD) current adjast. If one of these (current setting) resistor is damaged then you will recieve no light. There are also protective resistors... They can also be faulty.

07-08-2004, 18:51	#14 (permalink)
Trion Freak Poster Join Date: Nov 2003 Posts: 370 Member: 44625 Status: Offline Thanks Meter: 36	Its true that resistors can get damaged, but in most cases changing the IC solves the prob.