Nokia Some Hardware Solution

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Nokia C2-03 White Screen, No LCD Screen Display Problem Solution



This solution covers to fix Display problem for Nokia C2-03, C2-06 and C2-08 Dual SIM card slider phone. These are just simple hints on how to troubleshoot display problems such as white screen, empty or black screen. I'm referring display problem that you may still hear an audio from the device like welcome tone, alert tones or ringtones., and this solution covers for hardware troubleshooting only.

Some white screen are cause by a firmware failure. So, if you may try to figure it out either you will do a software or hardware calibration do things as follows.
Power up the device, observe if you can still hear any welcome tone. Try to send message or call the phone and see if the alert or ringtones is still in there. If you do can still hears it, then the problem is on hardware failure, If there is no response at all and just stock in white screen then the problem lies on firmware.


How to fix Nokia C2-03 White screen and other display problems such as blue screen, blank or empty screens.
If you try to fix firmware problem, simply flash the phone to it's original firmware version. The firmware version for Nokia C2-03 is RM-702.

If you do have hardware problem, follow the simple hints below.
1) Check the flex and LCD pin to pin connections, ensure that it is properly in good contact. A weak or loosen contacts will cause the display problem.
2) Check the LCD screen for possible damaged or cracked. If you ain't sure better have a extra LCD at hand just for a quick test.
3) Check the flex ribbon cable for possible damaged. Since Nokia C2-03 is a slider phone, the possibility of display problem is cause by flex failure.
4) If both the flex and LCD were already confirmed working and okay. You may then proceed in troubleshooting certain components on the Nokia C2-03 PCB board.
5) See the solution below, check the highlighted components surrounding, clean it if there is an oxidation spotted.
[IMG]http://2.bp.********.com/-ozFzv5B0Qqk/TmMYe_CqP9I/AAAAAAAAB4M/F8RAtQqx5NI/s320/Nokia+c2-03_c2-06_c2-08+display+solution.jpg[/IMG]
View larger image here.
6) Check each of the display filter components, do rework, resolder or replace it.
This solution may also works on Nokia C2-06 and Nokia C2-08 dual SIM card phones, because both are the same as of Nokia C2-03 PCB board.

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In this solution we show you the Nokia C2-03 keypad LED light components which is useful to fix when the keypad LED failed to work. There are two white LED light used in in illuminating the keypads, it may also get damaged due by water, wet or cause by oxidation build ups.

The solution below shows the connection line paths of the two white LED's which is more convenient in tracing broken spots. It also shows which nearby particular components it is being connected or part of the keypad back lighting circuit.

Here's the some hints that may preferably help fix in troubleshooting Nokia C2-03 keypad back light failure.

1. Check the whole area and surrounding components for the keypad white LED for possible damaged, cracks, oxidation etc. Clean it first if necessary.
2. Check both of the two LED's using a multimeter. Replaced if already damaged.
3. If the LED's light are still working check the (VBAT 3.7V) battery voltage line paths.

[IMG]http://2.bp.********.com/-nVkFthJ_vhU/TmMYe07RlKI/AAAAAAAAB4Q/0KZ_mrKA6cY/s320/Nokia+c2-03_c2-06_c2-08+keypad+led+backlight+jumper+ways+solution.jpg[/IMG] Nokia C2-03,C2-06,C2-08 Keypad light problem Solution 4. Check each of the LED's positive and negative connections.
5. Check the connected resistors and coils, re-solder or replace if damaged
6. Check the LED driver transistors. Re-work or replace if necessary.
View larger picture here.

This solution may also works on Nokia C2-06 and Nokia C2-08 since they both similar PCB board layout with Nokia C2-03 a Dual SIM card built in capability and a slider phone.

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If you are looking and having trouble finding where to put a jumper if the touchscreen pin connector is already gone or lifted due to water water damaged on Nokia C7-00. This solution might help you to ease out your hard time finding where to solder a jumper wire on it just to fix a touchscreen not working problem.

This solution exactly shows the connection line paths of the touchscreen pin connector of the Nokia C7-00 PCB board layout. You may only need to check its corresponding pinouts if the connection were already cut-off or have an open circuit, then solder a jumper on it, for it is only the options.

[IMG]http://1.bp.********.com/-CN8gxe9c1Uc/ToHxFI3kBjI/AAAAAAAAB7Y/HfdUteJERwQ/s320/Nokia+c7+touch+screen+pin+conector+jumper+ways+sol ution.jpg[/IMG] Nokia C7-00 Touchscreen Pin Connector Jumper Solution

view larger image here:

Jut also check out all the corresponding components where the particular pins is connected for it will also cause the problem if already damaged or corroded. The two coils are for the touchscreen supply voltages 1.8V and 2.8V , the corresponding resistors are for the touch screen data signal filters which has a rated value of 100ohms each. So, that's it and hope this helps to you on fixing Nokia C7-00 touchscreen problem.

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Okay, due to some folks requesting this solution, here comes the Nokia C2-03 LCD screen display backlight LED problem solution. We already have the keypad light solution posted here, so this gonna be a continuation of the white backlight LED troubleshooting for Nokia C2-03. This will also work on C2-06 and C2-08 a dual SIM card slider phone.

Since Nokia C2-03 is a slider phone and used a UI flex (flexible ribbon cable), that is use to connect the LCD screen display from the main PCB board. Now in fixing backlight problem on the display, we must always consider that the flex is vulnerable and may cause the problem.

Here' how to troubleshoot the Nokia C2-03 backlight LED problem:
For quick fix, on minor problem like if the phone status shows no indication of being wet by any liquid, free of oxidation build up or the PCB board is still clean.
- Check the Flex ribbon cable wire.. replace if damaged.
- Check/ try to replace the LCD screen, the white LED's on it may already been busted.

This figure shows the connection line paths of the backlight LED's on Nokia C2-03 UI flex cable. There are two white LED's also mounted on both sides of the top part of the flex. This two LED's were also connected to the inner backlight LED's of the LCD screen.
Take note: the LCD's backlight is also connected in parallel circuit like the two LED's on the flex - meaning if that two LED's was still able to light up but not on the LCD, it means that the LCD's backlight LED is already busted. So check that out...

[IMG]http://1.bp.********.com/-UC_ojnW63lo/TrlR45rMx_I/AAAAAAAACA4/I1cwSGtZ_Pg/s320/Nokia+c2-03_c2-06_c2-08+LCD+display+Backlight+LED+on+flex+solution.jpg[/IMG]
View in larger image.

The Nokia C2-03 backlight driver components.
In this figure shows the detailed components or parts that is called "LED driver circuit".
This will cause the display backlight loss if one of these components being damaged and or each of its connection line paths breakdowns. This circuit may only damaged if the device suffered wet or water damaged that resulted into oxidation build ups and then caused a short or open circuit.
[IMG]http://2.bp.********.com/-G-qbitHdg1c/TrlR2Jz9qvI/AAAAAAAACAw/BzruTpi0u5I/s320/Nokia+c2-03_c2-06_c2-08+LCD+display+Backlight+LED+solution.jpg[/IMG]
view the larger image .

So, check out these parts:
- Clean these components surface if necessary.
- Check each of the filter coils first. Replace if found damaged.
- Trace the VLED and VBAT_BB connection line paths - point to point to the corresponding capacitors, filter coils and including down to the Flex pin connector.

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Here's a troubleshooting hints for Nokia X7-00 LCD Display problem such as blank display or no display at all and otherwise a corrupted or garbled display. This solution may help you for easy repair procedures.

Note: This only works if you can still hear something on the phone like tones, incoming alerts and not on a white screen problem or hang up on white screen situation.

The quick step to fix display problem, is that you have to verify a working LCD, just replace the LCD screen module at once just to ensure that the LCD is working or not and then proceed to hardware troubleshooting after confirming that the LCD is still fine. Just locate the highlighted components shows on figure solution picture below and do have a careful check up on each one of them one by one.

[IMG]http://1.bp.********.com/-e1Xfhzl1kD0/TsVynNKCc3I/AAAAAAAACBk/h6zm-AM14qs/s320/X7-00+Display+problem+solution.jpg[/IMG]
view larger image here.

- Check the display pin connector, clean it, rework or re-solder it if necessary.
- Check the capacitors and coils, replace if necessary, and then check the VBAT voltage and the VIO voltage on it. Those are the supply voltages for the display
- Check the two DSI line choke filters
- If those parts above already checked and seems nothing wrong, the problem possibly exist on the Display UI chip. Reworking or replacing it will only fix the display problem

For damaged or lifted display pin connector or due to wet or water damaged, here's the tracing guide if you might think that the problem lies on a broken display signal line paths.

[IMG]http://1.bp.********.com/-_2ebZGk5hC4/TsVykqHqQkI/AAAAAAAACBc/8cPxVEyL220/s320/X7-00+Display+pin+connector+jumper+ways+solution.jpg[/IMG]
view larger image here.

So, hope this helps you in fixing display problem on Nokia X7-00.

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Here's the guide on how to fix the Nokia X7-00 that shows "Charger not supported" error when the battery charger is being plug-in. This solution below shows the so-called BTEMP 47K resistor in Nokia X7-00 devices that mostly known by technicians that if being damaged will result to Charger Not Supported problem. This is another not charging problem issues but with a different method on how to fix it.

[IMG]http://1.bp.********.com/-0n6LfNAHszU/TsYK-1t0WYI/AAAAAAAACB4/YAQMjeIosxY/s320/X7-00+charger+not+supported+Solution.jpg[/IMG]

You can view the larger image here. Just locate that component mounted at the side of the PCB board and replace it. Some problems may also cause by a battery connector, so ensure that the battery terminal are also okay, before attempting to replace it.

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Here's the solution for Nokia X7-00 in fixing handsfree speaker no audio problem. The Nokia X7-00 has two handsfree speakers located at the bottom left and right corners of the device. If something went wrong like if there is no sounds can be heard if the handsfree or loudspeaker is being activated, this solution might help for your repair.

Hints in troubleshooting Nokia X7-00 not working handsfree speaker problem.
You may start by manually checking the two speakers using a multimeter tester.
Check the filter coils, for possible damaged, clean the surroundings including the speaker terminal pads if oxidized found.
Trace the connection line paths between the speaker terminal pads to each filter coils where it is being connected.

[IMG]http://2.bp.********.com/-Wqcmh2kJWJM/TtUcA2nqW5I/AAAAAAAACFg/sfPQu7Q3xXU/s320/X7-00+Hands+free+Speaker+jumper+Solution.jpg[/IMG]

View larger picture here.

If the first attempt of those methods above doesn't fix the speaker audio problem. The next option is to work on the Audio Codec IC. You may check the VBAT 3.7v across the filter inductor coil, this is the supply voltage to make the Audio IC work. If the voltage is okay, check all the surrounding components of the Audio chip.

[IMG]http://2.bp.********.com/-cU5HNS9_5rA/TsYLEktTYcI/AAAAAAAACCM/bc26rh0eD5Y/s320/X7-00+Speaker+Solution.jpg[/IMG]

View the larger picture here

Rework the Audio Codec IC and then replace if necessary. However, if the problem still exists, there are two options which can be suspected as became faulty - its either the ASIC (Power IC) or the CPU. But working this chips needs a great soldering skills, so if you don't have guts to do it, just ask an assistance to your head technician on duty.

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This solution covers for Earpiece Speaker problem on Nokia 500 with a 3.2 inches display, TFT capacitive touchscreen phone and runs in Symbian Anna OS. If somehow when the speaker goes wrong and no indication of any audio can be heard over the speaker during when a call has made. This may sometimes happens due from like wet or water damages, and any accidental damaged that might cause the speaker stop working.

This solution provides some simple hints on how to fix it, just take a minute to analyze and locate the speaker parts and the entire connection on the PCB board as shown on the solution image below.



[IMG]http://3.bp.********.com/-h8Lo3zVi1yc/Tug-LK8LvAI/AAAAAAAACG8/2mJA_4NBBoE/s320/Nokia+500+Earpiece+speaker+jumper+ways+solution.jp g[/IMG] GsmAngel Nokia 500 Earpiece Speaker Repair Solution Hints in troubleshooting Nokia 500 Earpiece Speaker

1. Start to check with Speaker assembly, it is located at the top of the board behind the LCD screen.
2. Check for possible corrosion build ups, speaker terminal bending. Clean it including the speaker terminal pads or aligned it again if either the connection might be weak.
3. Check the speaker using a multimeter. Set the tester to X1 and check if there is crackling sound can be heard and the tester responds. If no indication of anything, the speaker is already burned out or damaged. Replace it at once.
4. If the speaker is okay, and still there is no sound can be heard, check the firmware. Update it or do re-flash.
5. If the problem still exists, the possible faulty is the GAZOO ASIC chip. The only solution for that is to rework or replace it if necessary and that's need a good soldering skills to do it.
Warning: If you do not have much skills on how to to re-ball or install a BGA chip, just leave it to the experts. Attempting to touch that chip without expertise will cause the phone dead in no time.

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Here's another solution for Nokia 500 speaker problem. Previously we show you the earpiece speaker problem solution, this time we got the buzzer speaker part to tackle with.
In this solution shows the connection line paths of the Nokia 500 IHF speaker and its components.
You can use this to troubleshoot if the there is no any audio can be heard over the speaker, like ringtones, music and in loud hands free mode. You may locate the components that I highlighted on below picture and check that certain area for possible damages might occurred. The speaker is replaceable and fixing this kind of problem was not that much hard enough. This problem may only sometimes happens if the device suffered wet damaged and or accidentally heavily dropped.

[IMG]http://4.bp.********.com/-Dg5MfWYBCYs/Tug-MsbI_yI/AAAAAAAACHE/YThTtQRfXY4/s320/Nokia+500+IHF+speaker+jumper+ways+solution.jpg[/IMG] GsmAngel Nokia 500 Speaker Problem Solution

View in larger image

Hints to fix Nokia 500 IHF Speaker problem:
1. Check the IHF speaker assembly for possible damaged and or misaligned. Use a multimeter to check i, replace if already busted.
2. If the speaker is okay, check and clean the speaker terminal contact pads. Corrosion might weakened and loosen the connection.
3. Trace the speaker+ and speaker- connection to each certain components where it is being connected.
4. Check and replace the filter capacitor and resistor components.
5. If the above method doesn't fix the problem, the possible defective part is the GAZOO chip.
Reworking or replacing it might only fix the problem, but that tasks needs a good soldering skills. So, don't touch that chip if you have not enough knowledge in reballing a ball grid array (BGA) chips. Particularly that IC for it also holds as the power integrator of the whole circuit.

That's it., Enjoy!
It's been a long time since I don't have any new post on this blog of mine. Hope, you aren't tired of keep visiting my blog..

[vsy]

hi nokia 112 show full network when calling no net work
please any solution

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Nokia 5030 UEM Reballing procedures and techniques.

1. remove the hot sink covering shield.
Picture1



2. apply adequate soldering paste to the UEM'S surrounding.

Picture 2



3. Apply heat and remove in upward direction when the solder balls already melted.

Picture 3



4. Once remove clean the UEM call bumps.

Picture 4



5. Do apply and reball the UEM

Picture 5




6. Once reballing the UEM has been made. replace the UEM according to its pattern on the PCB Board.



Picture 6





7. put the covering shield back.

Picture 7


8. Flash the Phone, write RPL and Rebuild IMEI

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This repair solution show the particular components and line paths of Nokia 1800 and Nokia 1616 Lcd display signals. This guide can be used for quick troubleshooting and repairing display problem issues on Nokia 1800 and Nokia 1616.
This repair guide shows on where and which particular components of the LCD data signal feeds across to a particular components, including even the solder ball bumps of the infeon X-gold 110 chip through to the LCD filter coils, resistors and LCD display module.

[IMG]http://1.bp.********.com/_haRAPmO1Seg/TGjbtR6lotI/AAAAAAAAAaM/F0Q2h-2vcAs/s400/Nokia+1616+1800+LCD+display+jumper+ways.jpg[/IMG]

There are two LCD voltages that feeds to the LCD module, the 1.8 volts Dc which is in color pink line and the 2.8 volts which is in green line. The other four which are the display data signals.
This guide is useful when the display data filter coils and resistors already been replaced but the problem still exists. You can trace all of those corresponding line paths when the time that you need to remove, rework and even trying to replace a new IC.

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Here's a complete repair guide to fix Nokia 1800 and Nokia 1616 Insert Sim Card problem issues. This solution shows the complete line paths of the SIM card circuit which we can used for easy troubleshooting procedures, including its connection to the IC components solder ball bumps.

Nokia 1800 and Nokia 1616 Sim card circuit connection layout
[IMG]http://2.bp.********.com/_haRAPmO1Seg/TGlw2hlgRWI/AAAAAAAAAaQ/YAiMpFDwCrg/s400/nokia+1616,+1800+sim+card++jumper+ways+guide.jpg[/IMG]

The Sim card circuit of Nokia 1616 and Nokia 1800 used an EMI filter chip for the circuit protection.
This EMI filter IC can be damaged if an excessive electromagnetic interference or electrostatic discharge interfere with the circuit. The Vsim which is the voltage being supplied to the sim card to make it work also cause the problem if being cut or damaged, this voltage range from 1.8 to 2.4 volts, the voltage varies according to the type of SIM card.

Repair hints for Insert SIM card Problem repair procedures:
1. You may check the circuit surroundings first and see to it that it is free from dirt, foreign object and corrosion, a corroded components may also cause the problem, clean it first as necessary.

2. You may start to check the VSIM line paths continuity by using a multimeter, start from the VSIM capacitor through to the SIM card pin connector, to check if that said line is okay.

3. Check the ground line of the sim card pin connector, If the ground line is cut it also cause the problem.

4. Remove the EMI filter chip if the above check up is okay, check the EMI filter IC internal line paths, from solder bumps; A2 and A3 are the line for the the SIM data and the resistance value is 100ohms, B1 and B3 SIM reset, the resistance value is 100 ohms also and then C1 and C3 for the SIM clock signals which has a resistance of 47 ohms. Replace it if found busted or damaged, you can easily find a replacement for it in other non working Nokia cell phone models PCB board that has an EMI filter IC also, just look for the solder bumps configuration if it's same.

5. This part may need an adequate experience and extra care to handle with or you may end up killing the phone, if you are a beginner mobile phone techie you may need to ask assistance to your head tech or a senior and most experience one technician before doing this procedure.
Now if all the above does not solve the problem, you may need to reflow, rework, remove the main IC labeled X-gold 110, then check the solder bumps continuity through to the SIM pin connectors, then reball it and in-place it back.

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This solution shows the complete line paths of Nokia 1800 and Nokia 1616 charging circuit connections that can be used for repairing charging problem issues on the device such as, Not charging, Charging no response when inserted or it does not show charging indication when a charger is being plug-in.

Nokia 1616 and Nokia 1800 Not Charging Solution ( circuit connection line paths )
[IMG]http://1.bp.********.com/_haRAPmO1Seg/TGmDhmZmweI/AAAAAAAAAaU/beha-9fn9VA/s400/nokia+1616,+1800+charging+solution,+jumper+ways+gu ide.jpg[/IMG]
Nokia 1616 and Nokia 1800 charging ways

Repair Procedure on Nokia 1800 and Noki1616 not charging problem.
procedure below may varies accordingly from case to case basis.

1. Check the charging pin connector if its free from dirt and corrosion. Clean it if corroded or find a replacement spare on it then replace it.

2. Check and clean the charging pin connector terminal contact pads.

3. Check the chip fuse if it is busted or damaged by using a multimeter. If found damaged, check the chip diode if shorted. Replace both of it the don't apply jumper on the chip fuse, this method can still save the phone in the future, if you apply jumper on it directly the phone will be dead if a short circuit happen on that particular area again and other than that, it's so very unprofessional way.
You can easily find a replacement of this spare parts component to other non working PCB board.

4. Check all the components remaining as shown on the solution picture, a resistor marked R2200 is a fusible resistor which has a value of 0.55 ohms. This resistance value consider as fusible and may easily break or cut if a short circuit has occurs like a water damaged devices.

5. Those transistor shown in the solution image is the voltage regulator that holds and control the charging voltage from the battery charger. The small one has six legs on it and the other one which the big has three legs, just refer to the PCB board layout of your device for the exact component layout.
replace both of it if not so familiar to check those components.

6. The last part needs adequate experience to perform if all of the above does not solve the problem,
Take note: you may do this at your own risk.. just don't do it if your just a beginner or you may end up killing the phone. re-flowing and reworking the X-gold 110 chip needs extra care and proper training.

[..::Nokia::..]

Here's the solution to repair Nokia 2710ne Charging problem issues when being damaged or occurred like, Not charging, unable to charge up the cell phone battery or it does not show the charging indication whatsoever.
This repair solution shows the location of each particular components that possibly might damaged if the said charging problem occurred.

Nokia 2710 NE charging circuit components location layout
[IMG]http://1.bp.********.com/_haRAPmO1Seg/TGpUWW-SvGI/AAAAAAAAAaY/MnXAHER6vbY/s320/Nokia+2710+ne+charging+jumper+ways.jpg[/IMG]

The charging circuit of Nokia 2710ne is originally same us other nokai mobile phone devices. it is located at the bottom side of the PCB board isolated from other components.

Check up and repair tips:
1. check, clean or replace the charging pin connector and also see to it that the charging pin contact pads is al free from dirt and corrosion.

2. check the continuity of the fuse by using a multimeter, if found busted replacing it is highly advice.
check the diode if it is shorted, a shorted diode may cause the fuse to ****n again, replace it also and don't just remove it and leave it hang in there. In this method you can save the phone in the future when an excessive charger voltage may cause the trouble again.

3. All other components needs also to check, replace as necessary if the above solution does not solve the problem. just follow the instruction on the repair guide picture above according to it marked numbers.