Kenwood TS-820 Manual

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34. Use the board layout of the Coil Pack to locate thepositions for the ANT andMIX coils on the Coil Pack.5. Install the ANT and MIX coils on the Coil Pack.6. Remove both covers from the PLL Assembly.7. Remove the 5 Phillips head screws holding the PD Unit in the PLL assemblyand carefully remove the PD unit.8. Use the board layout of the PD unit to locate Q11.9. Install R01, R02, C01, C02 and X01 as needed for the band desired.10. Locate terminals AUX, B1, B2, B3, and B4 on the PD unit.11. Install a jumper from the AUX terminal to the B terminal for the band desired.B1 is for 1.8 MHz to 9 MHz, B2 is for 10MHz to 18MHz, B3 is for 19MHz to24MHz and B4 is for 25MHz to 30MHz.12. Replace the PD unit in the PLL Assembly.13. Use a 3mm nutdriver to remove the 4 hex nuts mounting the VCO unit in thePLL assembly, then remove the two phillips screws.14. Carefully remove the VCO unit from the PLL assembly.15. Use the board layout of the VCO unit to locate Q11.16. Install C01, C02, C03, C04, C05, and T11 as needed for the band desired. InstallT11 last.17. Replace the VCO unit in the PLL assembly.18. Install the connectors on the PLL assembly.ALIGNMENT1. Turn on the TS-820.2. Tune VFO to 250.3. Set band switch to AUX.4. Set the TUN/NOR switch on the VCO unit to TUN.5. Connect a frequency counter to terminals TP5 and TP6 on the VCO unit. (TP6 isground).6. Adjust T11 for a frequency of 9.08 MHz plus the lower limit of the banddesired.7. Connect a frequency counter to TP4 and ground on the PD unit, and verify thefrequency of the reference oscillator. It may vary +/- 500KHz.8. Return the TUN/NOR switch on the VCO Unit to the NOR position.9. Turn off the TS-820S.10. Replace the covers on the PLL assembly and reinstall it in the transceiver.11. Replace the top and bottom covers on the TS-820S.CAUTIONDo no use magnetized tools when working on the PLL assembly. Beryllium tools wouldbe better than ferrous ones. If the PLL assembly should become magenetized, use a bulktape eraser on open core AC transformer to demagnetize it.TA7201P Substitution Parts KitThe Toshiba TA7201P audio amplifier (Q3) used in the TS-820(S) and R-820 is nolonger available. The part has been replaced with a kit (Part # W05-0257-00). This