Kenwood TK-7102H Service Manual

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30TK-7102HReceiver SectionADJUSTMENT1. Seisitivity 1) CH : RX low (Wide/Narrow) SSG ANT Check SINADCH : RX center (Wide/Narrow) Oscilloscope EXT. SP : 12dB or higherCH : RX high (Wide/Narrow) AF V.M2) SSG output Distortion meter: –118dBm (0.28μV) (Wide): –116dBm (0.35μV) (Narrow)Mod : 1kHzDev : ± 3.0kHz (Wide)Dev : ± 1.5kHz (Narrow)2. Squelch 9 1) CH : RX low (Wide) PC key Adjust to open the squelchCH : RX center (Wide/Narrow)CH : RX high (Wide)2) SSG output: –113dBm (0.5μV) (Wide): –112dBm (0.56μV) (Narrow)Mod : 1kHzDev : ± 3.0kHz (Wide)Dev : ± 1.5kHz (Narrow)3. Squelch 1 1) CH : RX low (Wide)CH : RX center (Wide/Narrow)CH : RX high (Wide)2) SSG output: –120dBm (0.22μV) (Wide): –119dBm (0.25μV) (Narrow)Mod : 1kHzDev : ± 3.0kHz (Wide)Dev : ± 1.5kHz (Narrow)Item Condition Test equipment Terminal Parts MethodSpecifications/RemarksMeasurement AdjustmentPCB Section1. Setting 1) Power supply voltageDC Power supply terminal : 13.6V2. VCO lock 1) CH : TX high Digital voltmeter CV TC2 5.5V ± 0.1Vvoltage* 2) CH : RX high TC1 5.5V ± 0.1V3) CH : TX low Check 0.8V or more4) CH : RX low3. IF coil 1) CH : RX center (Wide) SSG AFV L22 3.2~3.3V (DC)2) SSG output : –53dBm (501μV) Digital voltmeterMod : 1kHz, Dev : 3kHz4. RF 1) CH : RX center (Wide) Tra generator ANT TC3 Adjust the BPF waveformbandpass CH : RX low (Wide) Spectrum analyzer BPF TC5 to Fig. 1filter CH : RX high (Wide)2) Tra generator output : –30dBmConnect the spectrum analyzerto BPF terminal* Adjustment of TX VCO lock voltage1. Remove R224, R888 (fuse), R803 and R811 (all on component side).2. Remove PCB from chassis.3. Transmit and check voltage at [CV] point.Warning : Do not transmit if step “1.” is not complete.4. Adjust of voltage can be done by tuning TC2.Item Condition Test equipment Terminal Parts MethodSpecifications/RemarksMeasurement AdjustmentFig. 1