Kenwood FM Transceiver TK-481 Service Manual

Also see for FM Transceiver TK-481: User manual Instruction manual Specifications Instruction manual Service manual

32TK-480/481 ADJUSTMENTTest Equipment Required for AlignmentTest Equipment Major Specifications1. Standard Signal Generator Frequency Range 800 to 950MHz(SSG) Modulation Frequency modulation and external modulationOutput 0.1μV to greater than 1mV2. Power Meter Input Impedance 50ΩOperation Frequency 800 to 950MHz or moreMeasurement Capability Vicinity of 10W3. Deviation Meter Frequency Range 800 to 950MHz4. Digital Volt Meter Measuring Range 10mV to 10V DC(DVM) Input Impedance High input impedance for minimum circuit loading5. Oscilloscope DC through 30MHz6. High Sensitivity Frequency Range 10Hz to 1000MHzFrequency Counter Frequency Stability 0.2ppm or less7. Ammeter 5A8. AF Volt Meter Frequency Range 50Hz to 10kHz(AF VTVM) Voltage Range 1mV to 10V9. Audio Generator (AG) Frequency Range 50Hz to 5kHz or moreOutput 0 to 1V10. Distortion Meter Capability 3% or less at 1kHzInput Level 50mV to 10Vrms11. Voltmeter Measuring Range 10mV to 10V DC or lessInput Impedance 50kΩ/V or greater12. 16Ω Dummy Load Approx. 16Ω, 3W13. Regulated Power Supply 5V to 10V, approx. 5AUseful if ammeter requipped The following parts are required for adjustment1. Antenna connector adapterThe antenna connector of this radio uses an SMA termi-nal.Use an antenna connector adapter [SMA(f) – BNC(f) orSMA(f) – N(f)] for adjustment. (The adapter is not providedas an option, so buy a commercially-available one.)NoteWhen the antenna connector adapter touches the knob,draw out the knob to mount the connector.2. Universal connectorUse the interface cable (KPG-36) for PC tuning or the leadwire with plug (E30-3287-18) and screw (N08-0535-08) forpanel tuning. Connct the plug to the universal connector ofthe radio and tighten the screw.The lead wire with plug (E30-3287-18) and screw (N08-0535-08) terminals are as follows. Numbers are universalconnector terminal numbers.Caution1. When connecting the plug to the universal connector ofthe radio, a short circuit may occur. To prevent this, besure to turn the radio POWER switch off.2. Since the RX AF output is a BTL output, there is a DCcomponent. Isolate this with a capacitor or transformeras shown in the figure.3. Do not connct an instrument between red or black andGND.• Universal connector1: SSW3: SP–5: EMC7: PTT9: NC11: 5M13: RXD2: SP+4: MSW6: ME8: PF10: E12: TXD14: NC