Kenwood TK-280 Service Manual
Also see for TK-280: User manualInstruction manualInstruction manualPricing and specification manualService manual
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TK-280281 RXFO O RX audio filter output.2 RXGS O RX audio signal level setting amplifieroutput.3 RXIN I RX audio signal level setting amplifier input.4 FFSKGS O FFSK RX level setting amplifier output.5 FFSKIN I FFSK RX level setting amplifier input.6 TXOUT O TX signal output.7 IDCGS O IDC input level setting amplifier output.8 IDCIN I IDC input level setting amplifier input.9 TXFO O TX audio filter circuit output.10 AGND - Analog reference voltage stabilization.11 CST I/O Compressor stabilization.12 MICIN I Microphone amplifier input.13 MICGS O Microphone amplifier output.14 CALC I/O ALC Circuit response time setting.15 ALCO O ALC circuit output.16 CMPIN I Compressor input.17 CCHG I/O Compressor response time setting.18 CMPO O Compressor output.19 TXFI I TX audio filter input.20 VDDA - Analog power supply.21 VDDD - Digital power supply.22 STB I Data strobe pulse input / system reset input 1.23 DIN I Data input.Pin Port I/O FunctionNo. Namen Pin function24 DCK I Data synchronized clock input.25 REGS1 I Internal register select input 126 REGS2 I Internal register select input 2.27 XOUT O Oscillation circuit output.28 XIN I Oscillation circuit input.29 FFSKE I FFSK modulation enable input.30 TRD O FFSK modulation data latch timing output.31 RTM O FFSK RX synchronized clock output.32 RDT O FFSK RX data output.33 FCLR I F l a m e d e t e c t c i r c u i t r e s e t i n p u t ISystem reset input 2.34 VSSD - Digital ground.35 VSSA - Analog ground.36 FFSKST I/O FFSK modem demodulation circuitstabilization.37 PWROP O Speaker operation positive output.38 PWRON O Speaker operation negative output.39 PWRGS O RX output level setting amplifier output.40 PWRIN I RX output level setting amplifier input.41 EXPO O Expander output.42 ECHG I/O Expander response time setting.43 EXPGS O Expander input level setting amplifier output.44 EXPIN I Expander input level setting amplifier input.Pin Port I/O FunctionNo. NameAudio Processor : TC35453F (TX-RX Unit : IC13)n Block diagramSEMICONDUCTOR DATA |
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