SLUTIONS24

Friday, 16 December 2011

Nokia 2720f Earpiece speaker problem solutionNokia 2720f Earpiece speaker problem solutionNokia 2720f Earpiece speaker problem solution

Here's the Nokia 2720 fold solution for not working earpiece speaker (receiver) problem. This solution provides some step by step procedures on how to fix and diagnose if such ear speaker problem occurred.

In Nokia 2720 fold, the earpiece speaker is mounted on top and near the LCD screen displays. And also been connected and associated with the LCD flex ribbon cable assembly. Just refer to the solution and follow some procedures below.

Nokia 2720f Earpiece speaker problem solution

Nokia 2720 fold speaker jumper ways repair picture

Troubleshooting Nokia 2720 fold earpiece speaker problem:
Assuming that this problem is not cause by a firmware, so check and flash update the device first to any latest firmware version available.
1. Check the earpiece speaker using a multimeter, replace if damaged.
2. Check the Flex ribbon cable wire for possible damaged, replace if necessary.
3. Clean, the LCD pin connector, re-solder if the solder is lifted.
4. Trace the connection line paths of the earpiece speaker from the pin connector down to the bypass capacitors., check or replace also the capacitors.
5. The earpiece audio signals is feed from the LITEPLUS IC, there is a possibility that the problem is cause by this chip, reheat or rework it then replace if necessary.

That's it! Enjoy.

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Nokia 2720 fold Power ON-OFF Key Connection TracksNokia 2720 fold Power ON-OFF Key Connection Tracks

Here's the solution for Nokia 2720 fold Power On Off switch or END keypad problem,. This solution may only help fix the 2720 fold Nokia Mobile Phones, if the said device shows charging indications when the phone battery charger is plug-in but it doesn't turn the device ON when the power key is pressed.

To fix this problem, you may first check the keypad interface and keypad membrane for possible oxidation build up, clean or replace it if necessary, it might also cause the navigation and numeric keypad not to work.
Refer to this solution below if the basic procedures above doesn't fix the problem.

Nokia 2720 fold Power ON-OFF Key Connection Tracks

Nokia 2720 fold power switch keys jumper repair picture

Just trace the connection of the power key inner core to the capacitor and the ESD protection resistor then mend a jumper wire on it to reconnect if the said line paths is open or cut-off. The outer core is connected to ground lines, so check it as well. Replace those components also those components if necessary. If the connection paths and those components is okay, but still the 2720 fold don't turn ON, the possible problem may lies on the connection to the LITEPLUS IC. Reworking it and tracing the power key paths on the solder ball bumps C2 will only fix the problem.

Nokia 2720 fold insert SIM card problem solutionNokia 2720 fold insert SIM card problem solution

Here's the Nokia 2720 fold solution for insert sim card problems. You may first ensure that the problem is on the device and not on the sim card, you only need to by a new prepaid sim cards if its already been damaged.
This solution may only help fix if the phone does not detect any kind of sim cards inserted to it.

The solution below shows the connection line paths of the of nokia 2720 fold mobile phone sim cards circuit, for easy check up and repair procedures.

Nokia 2720 fold insert SIM card problem solution

Nokia 2720f cell phone sim card problems solution

Here's how the way we fix the Nokia 2720 fold insert sim card problem:
1. Clean the SIM card Pin connectors.
2. Check and read the SIM card supply voltage and ground pins, replace the SMD capacitors.
3. Replace the SIM Card filter IC.
5. If all of the above doesn't solved the problem,. Reworking the LITEPLUS IC is the last option. Replace if necessary.
Thats it! Hope this help.. enjoy!

Nokia 2720 fold charging problem solution 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 bended, 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 2730c MMC memory card problem solution Nokia 2730c MMC memory card problem solution

Here's a full Nokia 2730c MMC memory card problem solution that can be used to fix and repair nokia 2730c microSD memory card problems such as memory card not detected or memory card corrupted.

In some cases solving the MMC problem by only replacing the MMC controller chip might not work or does not solved the problem.This solution shows the MMC memory card circuit including the memory card transceiver chip voltage supply line paths for further MMC hardware troubleshooting on Nokia 2730c.
IF these said supply voltages were not present or being cut-off this will also result to MMC problem.

Nokia 2730c MMC memory card problem solution

You may need to check all those corresponding supply voltage line paths before attempting to rework or replace the MMC transceiver IC.

Nokia 2730c Power On and OF key Jumper Ways Nokia 2730c Power On and OF key Jumper Ways Nokia 2730c Power On and OF key Jumper Ways

Here's the solution for a water damaged Nokia 2730c that shows charging indications but unable to turns on when pressing the power key button.

The solution below shows the line paths of the Nokia 2730c On -OFF key connections down to the keypad filter chip. You may refer to the below solution for tracing the on-of line paths and mend an alternative jumper solution on it.

Nokia 2730c Power On and OF key Jumper Ways

The solution above shows that the power on -off key is being connected to the keypad filter IC. However, there is an open test spots somewhere located near on the keypad filter chip where you can directly apply the jumper wire without replacing the keypad filter IC.

Nokia 2730c LCD Screen Display Connection Jumper Ways and Tracks

Here's a Nokia 2730c LCD Display Problem Solution with jumper ways and connection tracks, that may help solve display problems like, blank or empty screen display, blue screen display, white blinking screen display, saturated or garbled screen display.

If encountered such display problem on Nokia 2730c, you must first try to install a new replacement LCD screen module and update the device flash firmware. Ensure also that the LCD pin connector is not damaged or lifted.

Nokia 2730c LCD Screen Display Connection Jumper Ways and Tracks

The above solution shows the LCD display connection line paths from the LCD pin connector to a corresponding resistor components near the application processor chip. These resistors has a resistance value of 33 ohms each. You must also check and then replace this resistors if found damaged to obtain the display signal data that feeds to the LCD Screen module. The LCD data signals were generated from the CPU chip and then feeds to these resistors before it goes through to the LCD screen.

If there is an open line paths found just apply a jumper wire on it to reconnect the cut or open line paths.