How To Repair Mobile Phone

 How To Repair Mobile Phone

Problems or trouble commonly found on cell phones can be categorized into3 categories of damage are:1. Problem Category Software2. Hardware Problem category3. Problem Category his SW and HWMobile phone problem and the solution
1. Total dead cell phoneMobile phones death total there are 3 kinds, namely the total dead since· Die alone,· Total dead due to falls, and· Total dead due to hit the water.a. Total death because death itself.Handling:The first can be done early steps as follows- Remove the battery and then reinstall it or try to use another battery and try to power- Check the battery connectors and try to press to see the level of flexible or not,If damaged replace a new one.- Connect the charging of the phone, when the indicator came in and turned on the phone still will not, then obviously you can not live on cell phones because of interference from the PA (Power Amplifier). After IC PA revoked your mobile phone can turn it on again. And so that no signal then it should be installed a new PA.- When the tide and the charging indicator does not exist in the cell phone still will not turn on it is necessary to do further tests using power supply. But there may also have an ugly tin on the PCB, remove the PA solution, then clean the tin on the PCB where the PA stick, replace the old PA, the HP switch, surely the flame.Examination of the power supply:Necessary power supply with a scale of 1 ampere ampere (A) or 1000 mA.With the aim that the examination can be more easily and clearly.The steps are as follows:- Plug the cable from the power supply to the mobile phone battery connector of at least 3 wires, with a sequence of negative and positive BSI. (Black, green and red)- Navigate volt power supply at 3.6 V (or in accordance with his tolerance Hp 0.5 V)- The phone in the off state, press the button on- If the current (amperage) to bookmark a digital ampere supply dipower when pressed on the button, nothing means there is a problem on its hardware (HW), it is necessary to check the components on / off until the battery.- If the amperage when pressed on the button, up about? 50 mA, then the problem that occurs is a matter of software (SW), then you need to do is re-programmed HP (flash) or the program upgraded to higher versions.b. Total death from falls.Handling:- HP should not be tested by using a power supply, but the first HP must be disassembled, heated, and repositioned back to the location / position of the components that change as a result of HP fell.- After that the new HP should be tested using the power supply to determine the damage to the Hardware (HW) / Software (SW).- Most likely a damaged components as a result of HP's fall had been a PA / Power IC.c. Total death due to hit the water.Handling:- For HP's first hit the water also should not be tested by using a power supply, because the risk of a short circuit occurs between the components in water, but HP must first divakum, heated, or by first diblower given IPA cleaning liquid, can also use the grain silica to absorb the water present in the HP.- Once the HP certainly has dried it, then we may use the power supply to determine the damage to the Hardware (HW) or Software (SW).- At HP's exposed to water, usually there is damage to HPnya accessories.2. Mobile phones totally dead because IC UI.In HP's case like this it is necessary to test the power supply equipment.The steps are as follows:- Connect the power supply on the phone, give the voltage (volts) of 3.6 V (or in accordance with his tolerance Hp 0.5 V)- When the phone is in the off state, refer to the needle ampere power supply would rise by 100mA.- Mobile phones to life, LED lights, vibra vibrate.Handling:- Remove the IC UI, then turn on the phone.- Then there is the display on the LCD mobile phone "Insert SIM Card".- Attach the new UI IC.- Turn on the phone, the phone will work fine.3. Total dead cell phone because the CPU IC.To find out whether the phone is turned off completely because the CPU IC is as follows:- Give the voltage (volts) on the phone using the power supply of 3.6 V (or in accordance with his tolerance Hp 0.5 V).- When the phone is not turned on, the needle ampere silent, but when the phone is switched on then the needle will rise 100mA amperes.Handling:- If the IC CPU is still in good condition, then we only need to heat the IC CPU by using blower, but if the CPU IC is damaged, then we need to replace with a new CPU IC. Before we replace the CPU IC we must first have a heat-resistant glue and liquid glue destroyer of anti-heat, because the CPU IC is protected by a heat-resistant glue, after we destroy the heat-resistant glue, then we can heat (blower) CPU IC to be replaced new. Similarly, after we replace the CPU with a new IC then we need to give more heat-resistant glue to protect the CPU IC we just replace it.4. Total dead cell phone when we call.For testing we use the power supply by:- Connect your phone with power supply, give the voltage (volts) of 3.6 V (or in accordance with his tolerance Hp 0.5 V) on the phone.- Needles amperes will not move when the phone is still dead.- We turn on the phone and then used to make calls, then the amperage needle will show a number above 400mA.Handling:- Replace the PA with a new IC, then do the test again as above, if the test results showed readings below the needle ampere 400mA, then the phone is in good condition.




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