LG KM710 Service Manual - Page 75
SIM Detect Trouble Shooting
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4. Trouble Shooting 4.8 SIM Detect Trouble Shooting SIM interface scheme is shown below. SIM_IO, SIM_CLK, SIM_RST ports are used to communicate DBB with ABB and the Charge Pump in ABB enables 1.8V/3V SIM operation. SIM_PWRCTRL SIM_IO SIM CARD VRSIM VRSIM R711 1K C704 120p J700 HSSC-8P-18 5 1 GND1 VCC 6 2 VPP RST 7 3 8 IO CLK 4 RSV2 RSV1 9 11 10 GND2 GND5 12 GND3 GND4 C705 0.1u C703 150p SIM_RST SIM_CLK C706 150p SIM Circuit Diagram SIM_CLK (C706) SIM_RST (C703) SIM_IO (R711) SIM_IO SIM_CLK SIM_CLK: SIM Card reference clock SIM_RST: SIM Card async/sync reset SIM_IO: SIM Card bi-directional data line SIM_PWRCTRL: SIM Card power activation SIM_RnW: SIM Card data line direction SIM_CD: SIM Card presence detection LGE Internal Use Only - 76 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
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