Sharp GX30 Service Manual - Page 73
SD (Memory) card is not recognized., Is SD/SIM FPC properly inserted to CN104?
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CONFIDENTIAL 17. SD (Memory) card is not recognized. GX30 Is the SD card checked for operation? YES Is the SD card recognized on PC, etc.? YES Is the card insertion detected? YES Is 2.75 V or more applied to VAPP? YES Can the SD card be formatted? YES After formatting, can the SD card be used? YES File system on the SD card is damaged. NO Use an SD card that has been checked. NO Is SD/SIM FPC properly inserted to CN104? YES NO Reinsert SD/SIM FPC, and try again. Does the signal of SD_DET become "L" when the card is inserted? YES NO IC106 is defective. SD card socket and CN104 are in poor contact. Hardwiring on PWB is broken. NO IC103 or Q103 is defective. NO SD card socket and CN104 are in poor contact. SD_CLK, SD_CMD, and SD_DAT [3:0] on PWB are broken or short-cir- cuited. IC106 is defective or has come off. NO IC106 is defective or has come off. 2 - 65
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