Monday, 25 July 2011

Nokia 1508 keypad Light problem ways solutions jumpers tips and tricks of Nokia 1508 keypad Light problem.

Nokia 1508 keypad Light problem ways solutions jumpers tips and tricks of Nokia 1508 keypad Light problem.
Here are the links of repairing diagrams of Nokia 1508 keypad Light problem ways solution.
you can solve easly Nokia 1508 keypad Light problem by the repairng diagrams of Nokia 1508 keypad Light problem which are given below.

If you have some knolage about repairing so you can easly pick the repairing process of Nokia 1508 keypad Light problem which is shown in figure.
If you can't understand the repairing diagrams which are given below so don't worry.
I am also giving you a littel discription of this image.

Here is the discription of Nokia 1508 keypad Light repairing diagram.

Here's the Nokia 1508 keypad not working solution for LED back light problem. This solution shows the connection line of the keypad light paths That May Be Useful for troubleshooting the problem.
To fix a keypad light not working, You May Check the first two LEDs on the keypad matrix. Were These two LEDs connected in series connection, It Mean if one LED is the Other bad one will Also will not light up. That so ENSURE Both LEDs are working.
If the two LED lights Seems Both working okay, referring to the solution below and do have a voltage reading and line connection paths tracing procedures.
You May Check the battery first positive supply voltage (VBAT) Which is about 3.7V connection, then the negative line paths Which Has A resistor connected to it. Check and or replace the resistor Also if Necessary.
The LED controller IC is the one That price range and engaged to switch ON and OFF the LED keypad, it work as a switching mechanism of the keypad light. There is a Possibility That May Also the problem lies on the LED control IC and You May need to rework or replace this chip just said to fix Such 1508 keypad light problem.

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