Blu Life Play X, Service Manual

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For the screen problem you should first use the alternative method to search out whether the
problem is in the motherboard or the LCD. Focus on examining the LCM connector and EMI filter
welding.. The backlight signal is completed by the LED driver chip RT9614. Generally, measure the
input voltage VBAT
and the enable control signal.
2.2.4.3 FM Module
The WIFI Circle is based on chip MT6628Q, comes with FM module and transmitter function, also
with both analog and digital audio channels choose from. The RF part supply short antenna
design and long antenna design.
The FM interface Circle as shown below:
FM use the headphone ground as the antenna
，
therefore the headset ground and the
motherboard ground have1000@100M magnetic beads to isolate FM(80M~108M)signals.
2.2.4.4 Camera Module
The module uses 8 million pixel AF camera as the main camera, 2 million pixel camera as the sub
camera. Through the connector and the baseband chip (the main camera series EMI devices)
directly connected.