Kenwood NXR-700 Service Manual

Also see for NEXEDGE NXR-700: Brochure Instruction manual Instruction manual Instruction manual Instruction manual

Contents

NXR-70046Audio AMP (IC29)LAN_IC (IC719)DSP_I/O (IC37)33BU33SHDC5018DSP DSP_Core (IC37)Switch (Q302)1.8V_AVR (IC18)3.3V_AVR (IC329)3.3V_AVR (IC15)3.3V_AVR (IC6)DC/DC converter(IC11, Q3)Main MPU I/O (IC703)Audio_circuitLED, OptionRF_Control_MPU I/O (IC34)RF_Control_MPU I/O (IC34)Rechargeable battery (BA300)SRAM (IC700), RTC (IC701)Main MPU_Core (IC703)Modem Control MPU (IC325)TX_Vocoder/RX_DSP_I/O(IC323/324)TX_Vocoder/RX_DSP_Core(IC323/324)15DSP33MPU33AUD15SH1.5V_AVR (IC306)1.5V_AVR (IC307)Switched byModem ControlMPU (IC325)50MPUDC8+B5V_AVR (IC16)DC/DC converter(IC10, Q2)Switched byModem ControlMPU (IC325)■ Initialization of the Modem control MPU (IC325)(normal oscillation of X301 and normal reset-unlock of IC303)Refer to Traceability procedure for IC325.■ Unlocking “SYS_RST” Signal on the Modemcontrol MPU (IC325) starts Up all HardwareBlocksRefer to the Reset circuit below.33BU33SH33SHIC700SRAMIC719LANIC703Main MPU33SH100K100K100KD16C_RST33SHIC70833MPUIC314IC325ModemControlMPU50MPUIC34RF Control MPU33SH33SH33MPUIC30333MPU33MPU33MPUDSP_RSTRESET_DIC324TXVocoderDSP33MPUIC323RXDSP50MPUIC3550MPUWPADSP_RSTIC37DSP33SHIC1750MPUEEPROMeachRF unit33SH33SHIC702Flash50MPU33SHfrom RTESYS_RST47K33MPU50MPUWP■ External DC 13.8V Power Source applied to the NXR-700 TerminalRefer to the power supply diagram sequence below.Reset circuitTROUBLE SHOOTING