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Nokia 5220 Xpressmusic Charging

If ever encountered a Nokia 5220 Xpressmusic that shows no response or indication on the LCD display
when a good and working charger is being plug-in. This trouble may cause by a damaged charging pin connector or an oxidated charging pin terminal contact pads.
Replacing and or by cleaning it will definitely fix the problem.

In some cases like a wet damaged Nokia 5220 there are certain components that may also get damaged like the charging fuse and or the protection diode. The solution below shows where this certain components being mounted or located on Nokia 5220 PCB board.

Nokia 5220 Xpressmusic Charging No Response Solution

You may check those components showed on the solution above and replace if found damaged.
You may start to check the fuse if already busted or cut-off, then down to the filter coil and the chip diode.
A shorted diode may cause the fuse to blown or breakdown. Replace it if its already shorted. 

Nokia 5220 Xpressmusic

Solution for Nokia 5220 Xpressmusic Ringer and Integrated Hands Free (IHF) Speaker that No sounds output can be heard on it.
If ever encountered this problem, you need to check the earpiece speaker first if it already busted or damaged.
If the speaker is working okay but still there is no audio sound output can be heard when being activated, you may use this solution below to trace the line paths and check particular components on Nokia 5220 PCB board that holds the IHF speaker circuit. This solution covered for left and right channel speakers connection.

Nokia 5220 Xpressmusic Ringer and Hands Free Speaker No Sound Repair Solution

The IHF speaker left and right audio signal is feed from the power and audio IC (AVILMA) then filtered by a non polar capacitors before it feeds to the audio amplifier IC. The audio amplifier chip is the one that boosts or amplify the audio signals to make it sounds louder and better.
The boosted or amplified audio signal is then feeds across to a filter coils, bypass capacitors and an ESD protection resistors before it get through to the IHF Speakers.

 Hints for Troubleshooting:
a) check the earpiece speaker first by using a multimeter.
b) clean the speaker terminals and contact pads.
c) check or replace the filter capacitors, filter coils and resistors if found damaged.
d) check the corresponding line paths of each corresponding connections
e) if all line paths and components is okay: Rework  the audio amplifier IC or replace if it doesn't work.
f) If all of the above is already been done but does not solved the problem, You may then proceed to rework the audio IC.Trace the line paths to each corresponding solder ball bumps that holds for the IHF audio signals before in-placing it back.

Nokia 5000 problems and solutions.

Nokia 5000 power ON-OFF switch key line is connected to the pin number 9, while the 5000 keypad LED back-light is on pin 12 and 13, then the rest left for ground lines of the keypad pin connector .
Here's the solution guide to fix Nokia 5000 keypad malfunction. In this picture guide its shows the keypads tracing line paths (keypad ways). This repair solution may help if the keypads membrane is okay but the keypads keys does not work or failed to initiate.

This also shows the 5000 keypad IC jumper ways, for temporarily test procedure before replacing with a new keypad filter IC spare parts. Just follow the colored lines on the picture  to trace each corresponding lines across the keypad pin connector socket on the main PCB board.

The Nokia 5000 power ON-OFF switch key line is connected to the pin number 9, while the 5000 keypad LED back-light is on pin 12 and 13, then the rest left for ground lines of the keypad pin connector .

Nokia 2720 fold charging problem solution.

Here's the Nokia 2720 fold solution for not charging problem such as "charger no response" it means that shows no charging indication when the battery charger is plug-in.

The solution below shows the Nokia 2720 fold charging protection circuit, that may need to check then replace if found damaged.

Nokia 2720 fold charging problem solution

Repair hints for Nokia 2720 fold Not Charging problem:
Check the charging pin connector for possible damaged, ensure that the pins were not vended, clean it if some oxidation build up found. Re-solder if necessary.
Then check and replace the fuse and the chip diode if damaged.

Nokia 6230/6230i Solution

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