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Troubleshooting Nokia 6230 mobile phone example

In Electronic Infomation Category: T | on April 19,2011

Nokia 6230 mobile phone

backlight off

Open the phone, remove the keyboard and AD517KH datasheet and display panels, boot, with the oscilloscope measurements X302 13 feet, not high there. Test-retest R312 both ends, there is no high, bringing the suspected faulty lighting control module N300. Replacement of N300, turn power on, the backlight can be bright, troubleshooting. Nokia 6230 phone is switched

signal appears diving

Open the phone, the Z808 in the GSM receive path filters out of a 2-foot antenna welding, power test machine, cell phone signal is still there diving, short the Z808, failure remains. Instead check the GSM transmit channel, 15 feet in the N700 amp welding an antenna.

Observed signal, can remain stable for some time suspected a problem with N700. According to the schematic, one by one check for multiple power supply pin voltage N700, were normal, and AD517KH price and then check N700 18-foot power control pulse signal, is also normal, estimated to be N700 damage. N700 replaced after the power test machine, cell phone signal stability, and AD517KH suppliers and troubleshooting. Nokia 6230 phone can not

with Charging

Open the phone, access by the end of the external power supply plug X102, check the fuse both ends of the F100, the normal turn-on, should be no problem. Check the charging voltage at one end R200, normal, and there is no check on the other end was estimated to be R200 open. Add welding R200, test machines, mobile phones can access state of charge, troubleshooting.

Nokia 6230 mobile phone is turned on no display

Open phone, remove the keyboard and display panels, veneer is turned on, the oscilloscope in the X302 connector , 15 feet check LCD supply voltage VFLASH1 and VIO, were normal; another look at several LCD control signals found no A0 address signal, careful cleaning and welding X302 plus seat, and then measuring A0 signal can appear. Heavy phones, power test machine, the phone can display properly, troubleshooting.

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