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General| Brand | Kenwood |
|---|---|
| Model | TS-680S |
| Category | Transceiver |
| Language | English |
Overview of the TS-140/TS-680 transceiver and its features.
Explains frequency control and operation of the transceiver.
Describes the Phase Locked Loop circuit and its function.
Describes the receive signal path and operation.
Explains the functions of the NB1 and NB2 noise blanker circuits.
Details the transmit signal path and configuration.
Explains the speech processor circuit.
Explains the digital control circuit and its operations.
Details the BU18400A CPU integrated circuit.
Details the MB87006 PLL integrated circuit.
Details the MB4062 A/D converter integrated circuit.
Details the TMP8255AP-5 I/O port integrated circuit.
Details the TC5518CPL-20 static RAM integrated circuit.
Lists components for the switch unit.
Lists components for the 100W final unit.
Lists components for the filter unit.
Lists components for the control unit.
Explains capacitor and resistor coding conventions.
Lists major assemblies and specific parts for the model.
Illustrates the step-by-step disassembly of the unit.
Shows items included in the product packing.
Shows signal levels within the receiver section.
Shows signal levels within the transmitter section.
Lists test equipment and details voltage checks.
Details PLL and RF alignment procedures.
Details receiver and transmitter adjustments.
Block diagram of the filter unit.
Block diagram of the signal unit.
Block diagram of the control unit.
Shows the circuit diagram for the control unit.
Shows the circuit diagram for the switch unit.
Circuit diagrams for the final unit and fan.
Circuit diagram for the signal unit.
Component layout views for various circuit boards.
External view of the TK-455C-1 CW filter.
Electrical specifications of the TK-455C-1 CW filter.
External view of the TU-8 tone unit.
Specifications for the TU-8 tone unit.
Description of the TU-8 tone unit circuit.
Adjustment procedures for the TU-8 tone unit.
External view of the IF-10C interface kit.
Parts list for the IF-10C interface kit.
Schematic diagram of the IF-10C interface kit.
General technical specifications for the TS-140S/TS-680S.
Transmitter output power and modulation specifications.
Receiver sensitivity, selectivity, and image ratio.
Lists optional accessories supplied with the unit.
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