Best All mobile Repairing solutions

If you encountered and try to fix a display problem like white screen, blue screen, a blank or black screen display on Nokia 1616. And also tried to replace it with a new LCD replacement but nothing happens and the problem still exists. This solution will show you a particular component parts which possibly might damaged and cause the LCD display problem.

The Nokia 1616 LCD Display pin connections to each particular components

The LCD display data signals are feeds from the data processor IC and filtered by a surface mount inductors or filter coil and a also chip resistors. If this chip filter coil and chip resistors being damaged, the display data signals which being feed to the LCD will be cut off and result to a display problem issues.
You may trace first the line paths of the LCD pins to each corresponding chip filter coils, Then check all of each surface mount inductor coil and resistors, all of the resistors valued 100 ohms each.

Nokia 1800, 1616 LCD Display Problem - Lines and components Test and Tracing spots

By Unknown4:32 AMnokia hardwareNo comments

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.

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

Solutions for Nokia 1800 and Nokia 1616 Insert Sim Card Problem

By Unknown4:30 AMnokia hardwareNo comments

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

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

Charging problem solution for Nokia 1800 and Nokia 1616

By Unknown4:28 AMnokia hardwareNo comments

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 )

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

Best All mobile Repairing solutions