Complete Fix Solution

Heres 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.


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 its 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.

Heres the solution to repair Nokia 1616 and Nokia 1800 power ON/OFF switch problem.
This problem may cause the device unable to power up when hitting the power key. The problem may easily configured if the power ON and OFF switch key has no response, but the device is not totally dead for it shows a charging indication when you charge it up. Now, this solution simply shows the line paths (ON OFF ways)of the power key. Hints for repair: when the device will unable to power up when hitting the power key button but it shows charging indication when you plug-in the battery charger, the problem may possibly lies on the power key line paths. But before tracing the line paths, you must see to it that the keypad membrane is perfectly clean and free from dirt, corrosion and oxidation.

You can check the power ON/OFF voltage to the inner core of the switch key terminal pads, this voltage may range approximately  from 1to 3 volts. If there is no voltage reading you get on that spot, locate and trace the  test spots for the power switch, see the picture guide above, it is located just near the keypad LED. Make a continuity check by using a multimeter to those corresponding spots indicated on the picture guide, from the power key pads through to each corresponding component. The outer core is connected to a chip capacitor located near the clock crystal oscillator.

Heres a simple solution that can be used to repair a damaged Nokia 1800 and Nokia 1616 Mouthpiece microphone problem, In this repair guide it shows the location of  particular components that might possibly damaged when the problem occurs. Tis solution can be used after in-placing or installing a new microphone module on the device but the problem still exists and does not solve the problem.

Repair tips:
1. Check or replace a new microphone replacement before proceeding..
2. make sure that microphones contact pads is absolutely clean, a poor contact pads of the microphones terminal also cause the problem.
3. check those two filter coil near the microphones contact pads, have a continuity check between the microphones contact pads core to each corresponding filter coil. The inner layer core is the positive and the outer layer core which  is the negative.
4. Continue to check the line paths across  to microphones circuit as shown on repair guide solution above. Trace and make sure that both positive and negative line is not cut or does not have an open circuit.
5. The B+ line indicated in the guide is the microphones circuit power supply, If this said supply voltage is missing or cut also causes the microphone nonfunctional.
A poor quality audio sound signal also occurs if there is a damaged components on that part.
6. The IC component solder ball bumps that holds the microphones connection can be used to trace those lines if an internal cut or damaged occurred, when all of the above hints does not solve the problem.

There are nokia 1800 all hardware solution.There are Total 14 problems solution in this software.They are
1.Nokia 1800 Charging solution
2.Nokia 1800 Charging jumper
3.Nokia 1800 Mic solution
4.Nokia 1800 Ringer solution
5.Nokia 1800 Ringer ways
6.Nokia 1800 Not charging solution
7.Nokia 1800 Test mode solution
8.Nokia 1800 Power button ways
9.INokia 1800 nsert sim solution
10.Nokia 1800 Keypad solution
11.Nokia 1800 Lcd Light jumper
12.Nokia 1800 Lcd light solution
13.Nokia 1800 Network solution
14.Nokia 1800 Pa jumper