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SD/SIM card detection - ASSY

SMT problem are the main cause of SD card detection.

Probe SD_CARD_DET (R2212.2) to check if it pulls high (1.8V) when tray is

inserted.

Check U2201 for cracks, short circuits, SMT problems. Also check:

SD card:

CON2206,

squeezed and bending pins.

X-ray to check all RLC components inside shielding U3002. If not, reheat the

shielding, and retry.

Tray insert detect pin state

CON2202, SIM card:

CON2204, CON2203, for any

Crack on U2201