Here's the Nokia 6760 slide keypad white LED backlight connection tracks. This may help as a guide in troubleshooting the said LED light bulbs if doesn't turns on or light up due to wet or water damaged and etc.
In Nokia 6760s there are six white LED bulbs used and mounted on the keypad matrix, both driven by an LED driver IC mounted near and besides the SIM card slot or holder.
Each white LED bulbs have individual voltage supply line paths but all both came from the LED driver IC.
Hints in troubleshooting keypad backlight failure on Nokia 6760 slide:
If all the white LED bulbs doesn't turns ON, check the VBAT voltage (battery voltage) across the inductor coil. Check the coil's resistance or continuity if the voltage is missing. If the voltage reading is okay, try to rework the LED driver IC. Replace if necessary.
If only one or two or at-least there is one LED is still working. The possible faulty is the LED bulbs, The ESD protection diodes and the connection line paths. So check the LEDs using a multimeter, replace damaged components and check for possible crack or open line paths etc..
In Nokia 6760s there are six white LED bulbs used and mounted on the keypad matrix, both driven by an LED driver IC mounted near and besides the SIM card slot or holder.
Each white LED bulbs have individual voltage supply line paths but all both came from the LED driver IC.
Hints in troubleshooting keypad backlight failure on Nokia 6760 slide:
If all the white LED bulbs doesn't turns ON, check the VBAT voltage (battery voltage) across the inductor coil. Check the coil's resistance or continuity if the voltage is missing. If the voltage reading is okay, try to rework the LED driver IC. Replace if necessary.
If only one or two or at-least there is one LED is still working. The possible faulty is the LED bulbs, The ESD protection diodes and the connection line paths. So check the LEDs using a multimeter, replace damaged components and check for possible crack or open line paths etc..
Nokia 6760s slide QWERTY keypad back light jumper ways solution by GsmAngel
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