Friday, June 8, 2012
LCD Display ways, a solution for Nokia 1616 Display Problem
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
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.
Solutions for Nokia 1800 and Nokia 1616 Insert Sim Card Problem
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
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 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
Keypad and LCD Display backlight LED failure solution for Nokia 1800 and Nokia 1616
This solutions shows the location of particular components or spare parts on the PCB board layout that might get damaged and cause the device for unable to light up the LCD display backlight LED's including the keypad backlight LED.
Nokia 1800 and Nokia 1616 LCD display backlights circuit components layout
This also includes the line paths of each particular voltage and current that feeds to the backlight LED's of the LCD display module from the inner most part of the main ic component solder ball bumps for deep troubleshooting analysis.
Repair tips: check and have a continuity test on all filter coils and each lines paths from where it is being connected according to the picture's layout
Earpiece and Ringer Speaker Solution for Nokia 1800 and Nokia 1616
Here's the repair solution to solve and fix nokia 1800 and nokia 1616 Earpiece and Loud Speaker (Ringer/buzzer) failure. In nokia 1800 and nokia 1616 the earpiece and ringer circuit have been combined and connected to a single speaker unlike the old types which have both different speaker in each circuit.
The below solution picture shows the line paths and layout of components for the Earpiece Speaker.You may trace all of those corresponding components if having trouble with the earpiece or Earpiece Audio sound problem. The positive and negative audio signal which flow across into four coils, a chip resistor 4.6 ohms and an EMI filter chip before it being feeds to the Speaker terminal pads and so on to the speaker.
Nokia 1800 and Nokia 1616 Earpiece Speaker components layout and line paths
The two remaining components are chip resistors, this resistors are fusible resistors with has a zero ohms value. Both positive and negative Audio signals also flow into the two filter coils and the emi filter chip then feeds trough to the speaker.
Nokia 1800 and Nokia 1616 Loud Speaker ( Ringer/Buzzer) line paths and components layout
All those components are very easy to check and you may find a replacement on it if found busted or damaged. If all of its corresponding components were already replace and making sure that all of it working perfectly okay but the problem still exists and no audio sound can be heard over the speaker, we may now consider that the problem lies on the line paths between the main IC or the IC itself is being damaged. connections.
Nokia 1800 and Nokia 1616 Earpiece and Ringer IC component solder ball bumps connection
The last solution solution for this is to reflow, rework the main IC component. Be sure to check the line paths of corresponding solder ball bumps of the IC component which holds the earpiece or the ringer loud speaker, after reballing it and inplacing it back.
Just be careful and have a good heat temperature and air flow control using you reworking station in handling the main IC module
