Model: IC-735 Bulletin: B1603 Subject: If there is CPU clock noise on 29 MHz 1. Remove the top and bottom cover from the radio. 2. Remove the PA section from the radio. 3. Remove the connectors from the PL board and remove it from the radio. 4. Unsolder the cathode end of D4 and bend the anode lead on D4 so it is sticking straight up from the board. 5. Install L97 (ICOM P/N 924-01948) in the hole where the cathode of D4 was removed. 6. Connect the free end of L97 and the free end of D4 and solder. 7. Reinstall the boards and covers on the radio.