Kenwood NX-900 Service Manual

Also see for NEXEDGE NX-900: Function reference Instruction manual Instruction manual

NX-90023COMPONENTS DESCRIPTIONTX-RX unit (X57-8060-10)Ref. No. Part Name DescriptionIC1 IC Temperature sensorIC3 IC PLL ICIC4 IC Buffer AMP (VCO tune)IC5 IC VCO modulation/Buffer AMP (CV)IC102 IC Power moduleIC103 IC Auto power controlIC201 IC Buffer AMP (2nd IF DET)IC202 IC IF ICIC203 IC Buffer AMP (RSSI/VAGC)IC401 IC Voltage detector (BINT)IC402 IC Voltage regulator (33M)IC403 IC Voltage regulator (80C)IC404 IC Voltage regulator (50C)IC 405 IC DC/DC converter (50M)IC406 IC Voltage regulator (33C)IC407 IC Voltage regulator (33GPS)IC408 IC Voltage regulator (33A)IC409 IC Voltage regulator (15M)IC501 IC Flash memoryIC503 IC SRAMIC504 IC RTCIC506 IC Reset (ASIC)IC507 IC Buffer AMPIC508 IC Buffer AMP (18.432MHz)IC509 IC Buffer AMP (BER CLK/BER DATA)IC510 IC ASICIC511 IC AND (CPS/FSX0)IC512 IC Level shift (AND ITXD1/SCTXD)IC513 IC Buffer AMP (TXD2)IC514 IC Level shift (I2CCK/I2CDT)IC515 IC Level shift (TXDO/RTSO)IC516 IC Level shift (RXDO/CTSO)IC517 IC I/O expanderIC518 IC RS-232C driverIC701 IC LPF (RXAF)IC702 IC LPF (MOD)IC703 IC LPF (APC/DEO)IC704 IC Buffer AMP (2nd IF DET)IC705 IC BPF/Buffer AMP (SQ)IC706 IC LPF/SUM AMPDisplay unit (X54-3680-10)Ref. No. Part Name DescriptionIC901 IC AFO/BLC switchIC902 IC AF buffer AMP (AFO)IC903 IC Voltage regulator (5C)IC904 IC Voltage regulator (33C)IC905 IC Bus buffer (TXD0)IC906 IC DC/DC converter (N100C)IC907 IC Dual bus buffer (RXD0/RXD1)IC908 IC AND gate (TXD1/RXD0)IC909 IC Buffer AMP (LCD Contrast ADJ)IC910 IC Bus buffer (D0-D7)IC911 IC MCUIC912 IC Bus buffer (A1-A2)IC913 IC Flash memoryQ901 FET AFO switchQ902 Transistor HK/RXD0 switchQ904 Transistor HK/RXD0 switchQ905 Transistor TX/RX LED (TX)Q906 Transistor TX/RX LED (BUSY)Q908 Transistor LCD backlight switchQ909 Transistor Dimmer switch (LCD backlight)Q910 Transistor LCD backlight switchQ911 FET Dimmer switch (LCD backlight)Q913 FET LCD reset switchD901 Varistor Surge absorption (DM/KVL)D902 Varistor Surge absorption (HK/RXD)D903 Zener Diode Over DC supply protectionD904 Varistor Surge absorption (BLC/AFO)D906 Varistor Line protection (SB)D907 Zener Diode Over DC supply protectionD908 Diode KEY matrixD910 Diode Reverse current prevention (HK/RXD)D911,912 Diode KEY matrixD913 Diode Line protection (PTT/TXDO)D914 LED TX/RX LEDD915~926 LED LCD backlightD927~936 LED KEY backlightD937 Diode Level shift (PRST)