A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the GC900F or compatibility with the net work, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service.
GC900F service manual D. Maintenance Limitations Maintenance limitations on the GC900F must be performed only by the LGE or its authorized agent. The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty.
GC900F service manual GC900 service manual 3.2.5 GPIO map Over a hundred allowable resources, GC900F is using as follows except dedicated to SIM and Memory. GC900F GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table [Table 3.2.5-1] S-Gold®3H GPIO pin Map...
3. BB Circuit Technical brief GC900F service manual 3.3.2 Charging control - GC900F uses external charging IC which is MAX8844 Charging method : CC-CV Charger output voltage : 4.7V Charging time : 2h 30m Charging current : 620 mA CV voltage : 4.2 V...
3. BB Circuit Technical brief GC900F service manual 3.5 SIM Interface GC900F supports 1.8V & 2.9V plug in SIM. SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with S-Gold3H-LC and the SIM power supply enabled by PMIC. SIM Interface SIM_CLK : SIM card reference clock...
[Figure3.14] shows the WLAN system architecture in the GC900F 3.12.2 Bluetooth The GC900F provides the Bluetooth 2.0 specification. The Bluetooth module is the optimal solution for any voice or data application that requires the Bluetooth SIG standard Host Controller Interface (HCI) using a high-speed UART and PCM.
4. RF Circuit Technical Brief GC900F service manual [Figure 4.2.5-3] GC900F Front End Control Logic Table 4.3 WCDMA Part The single-chip transceiver is designed to fulfill the W-CDMA UTRA FDD system requirements for bands I, II, III, IV, V, VI and IX. It contains all active circuits required to simultaneously modulate an analog W-CDMA I/Q signal to the TX RF frequency and demodulate a RX RF W-CDMA signal to an I/Q baseband signal.