Kenwood TS-870S User Manual - Page 82

14 INSTALLING OPTIONS 5 Orient the VS-2 unit with the large IC (IC1) facing down, then install this unit on the two threaded posts using the 2 screws. 6 Re-install Cover A (7 screws). 7 Replace the bottom case and re-install its screws (12 screws). Note: ◆ For more information, refer to the Instruction Manual provided with the VS-2 unit. ◆ The supplied screws and cushion are not used. Keep them for future use. SO-2 TEMPERATURE-COMPENSATED CRYSTAL OSCILLATOR (TCXO) CAUTION: Switch OFF the power and unplug the DC power cable before beginning installation. EQUIPMENT REQUIRED: • Large Phillips screwdriver • Small Phillips screwdriver • Pencil soldering iron (25 W) 1 Remove the top case (10 screws). 2 Unplug the speaker cable from the 2-pin connector CN404. Remove the speaker-bracket screws (4 screws), then lift out the entire speaker assembly. Speaker-bracket screws 4 Unplug CN407 (wired to the AT connector on the Rear Panel) from the circuit board. Lift up Cover B, and remove the small SO-2 board from the compartment below. Cover B SO-2 board 5 Insert the SO-2 unit into the SO-2 board. Solder the five pins on the unit to the board. SO-2 unit SO-2 SO-2 board 6 Slide the small switch on the SO-2 board in the direction of the "SO-2" arrow. CN404 SO-2 Speaker assembly Note: This switch must be positioned correctly for the SO-2 unit to function. 7 Re-install the SO-2 board in the transceiver in the same location from which it was removed. 3 Remove the remaining screws (6 screws) from Cover B. Cover B 8 Re-position Cover B, install only 6 screws, and replace CN407 that was unplugged in Step 4. 9 Re-position the speaker-bracket assembly, install its screws (4 screws), and plug the speaker cable into CN404. 10 Replace the top case and re-install its screws (10 screws). Note: For more information, refer to the Instruction Manual provided with the SO-2 unit. 76