Kenwood TK-280 Service Manual

Also see for TK-280: User manual Instruction manual Instruction manual Pricing and specification manual Service manual

TK-28036ADJUSTMENTTest Equipment Required for AlignmentTest Equipment Major Specifications1. Standard Signal Generator Frequency Range 136 to 174MHz(SSG) Modulation Frequency modulation and external modulation.Output -127dBm/0.1μV to greater than -47dBm/1mV2. Power Meter Input Impedance 50Ω.Operation Frequency 136 to 174MHz or more.Measurement Range Vicinity of 10W3. Deviation Meter Frequency Range 136 to 174MHz.4. Digital Volt Meter Measuring Range 10mV to 10V DC(DVM) Input Impedance High input impedance for minimum circuit loading.5. Oscilloscope DC through 30MHz.6. High Sensitivity Frequency Range 10Hz to 1000MHz.Frequency Counter Frequency Stability 0.2ppm or less.7. Ammeter 5A.8. AF Volt Meter Frequency Range 50Hz to 10kHz.(AF VTVM) Voltage Range 1mV to 10V.9. Audio Generator (AG) Frequency Range 50Hz to 5kHz or more.Output 0 to 1V.10. Distortion Meter Capability 3% or less at 1kHz.Input Level 50mV to 10Vrms.11. 16Ω Dummy Load Approx. 16Ω, 3W.12. Regulated Power Supply 5V to 10V, approx. 5AUseful if ammeter equipped.■ The following parts are required for adjustment1. Antenna connector adapterThe antenna connector of this radio uses an SMA terminal.Use an antenna connector adapter [SMA(f) – BNC(f) orSMA(f) – N(f)] for adjustment. (The adapter is not provided asan 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. Connect 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 provent 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 transformer asshown in the figure.3. Do not connct an instrument between red or black and GND.• Universal connector1: SSW3: SP–5: EMC7: PTT9: NC11: 5M13: RXD2: SP+4: MSW6: ME8: PF10: E12: TXD14: E