Prestigio PMP5570C, Техническое и сервисное руководство

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by integrated heating or line short.
2） 、Press the power button to see the power indicator and voltage
are all normal, there may be two situations:
A)firmware of software bug:programme the firmware again；
B)hardware bug:first to check up whether the mainboard integration
is heating with hand as well as the connecting line, and then use the relief
method that the trial run is replaced by mainboard and LCD；
2：Starting up crash at the stage of starting up picture
1） 、Firmware of software: caused byloss of document package or too
many softwares, so we suggest to reinstall the firmware；
2） 、Hardware trouble; a. check up whether the voltage is too low,
the adaptor is work well and no power of normal battery or failure of
battery。
3:The battery can’t be charged after starting up
1） 、Check up whether the battery lines is in good condition and it
has leakage failure；
2） 、Check up the power supply VCC+5v of battery is functioning. Its
control of circuit MAX8903 is showed as the below picture。
4： USB,HDM,SD card do no function
1）
、The three connections lead to mainboard directly, so we should
check up that if there is bad contact or broken connection first；
2）
、Check up that if the external device is compatible with native
machine；
3）
、For the long terms of inserting and pullting out, check up that
whether the weld between connector and mainboard is in good condition,
reweld it or renew the connector。
5：Camera do not work
1）
、check up if the camera can work or there is dust in external
camera
2、Check the hardware that whether sensor connect well with the
mainboard and replacing sensor judgement works well, or it is the
mainboard bug。
6: WIFI does not work
1）
、
chect whether WIFI can be started, please refer to the instruction to
get details；
2） 、Check the hardware that WIFI board and external antenna are
in good connection, voltage of WIFI board, Y3 crystal oscillator and
effectiveness of WIFI。