Kenwood TK-2168 Service Manual

TK-216812TERMINAL FUNCTION■ Solder point connectionMIC_I Mic input Input sensitivity/Impedance (1kHz std. dev.) 7±3mVrms @22kΩ LoadMIC_O Mic o utput Output voltage/Impedance (1kHz 15mVrms mic input) 2.6±1.0mVrms @2.2kΩ LoadOutput voltage/Impedance (1kHz 100mVrms mic input) 90±20mVrms @100kΩ LoadRA_I Receiver AF input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 75±20mVrms @22kΩ LoadRA_O Receiver AF output Output voltage/Impedance (1kHz std. mod.) 150±50mVrms @2.2kΩ LoadOutput voltage/Impedance (1kHz system mod.) 290±50mVrms @100kΩ LoadA1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddA2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddA3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddA4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddA5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddA6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ VddSB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5VGND GND Vss5C DC 5V Output Voltage/10mA load 5.0±0.5VTXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ LoadDEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ LoadLSDFO Received sub-tone output Output voltage/Impedance (150Hz 15% mod.) 180±50mVrms @2.2kΩ LoadALT Sidetone input Input sensitivity/Impedance (1kHz rated AF power/Vol. MAX) 7±3mVrms @22kΩ LoadDesignation Function Condition Value■ CN8011 GND GND Vss2 SB Switched B Output Voltage/7mA load DC (Battery terminal) ±0.5V3 A3 AUX3 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd4 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load5 A2 AUX2 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd6 A6 AUX6 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd7 A1 AUX1 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd8 A5 AUX5 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd9 A4 AUX4 Load >100kΩ (Low) Vss ~ 0.4V (High) Vdd-0.8V ~ Vdd10 NC Non connection Non connection11 5C DC 5V Output Voltage/10mA load 5.0±0.5V12 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load13 TXAFI Transmit AF input Input sensitivity/Impedance (1kHz std. dev.) 280±50mVrms @22kΩ Load14 DEO Discriminator signal output Output voltage/Impedance (1kHz std. mod.) 280±50mVrms @2.2kΩ Load15 NC Non connection Non connection16 ALT Sidetone input Input sensitivity/Impedance 7 ±3mVrms @22kΩ Load(1kHz rated AF power/Vol. MAX)17 NC Non connection Non connection18 NC Non connection Non connection19 NC Non connection Non connection20 GND GND VssPin Designation Function Condition ValueNo.