123 CONNECTION AND MAINTENANCECleaning■If the transceiver becomes dusty or dirty, wipe itclean with a soft, dry cloth.DO NOT use harsh solvents such as benzine oralcohol, as they will damage the transceiver sur-faces.Options■• OPC-1132A/OPC-347 dc power cableTwo fuse holders are attached. USE only the 20 A fuse.OPC-1132A: 3 m (9.8 ft)OPC-347: 7 m (23 ft)• OPC-1939/OPC-2078 acc cableAllows you to connect to an external terminal.OPC-1939: D-sub 15-pin, OPC-2078: D-sub 25-pinNOTE: No Digital Modulation “IN” using accessory cables.• HM-152/HM-152T/HM-148G/HM-148T hand microphoneHM-152 : Hand microphoneHM-152T : DTMF microphoneHM-148G : Self ground heavy duty microphoneHM-148T : Self-grounding heavy duty microphone with 10-key pad. The 10-key pad on this microphone canbe used for the only DTMF code transmission.• SM-26 desktop microphone• SP-30/SP-35 external speakerInput impedance: 4 øMax. input power: 30 W (SP-30)/7 W (SP-35)SP-30: High input power level.SP-35: Compact and easy-to-install.Approved Icom optional equipment is designed for optimalperformance when used with an Icom transceiver.Icom is not responsible for the destruction or damage to anIcom transceiver in the event the Icom transceiver is used withequipment that is not manufactured or approved by Icom.