Kenwood TK-3148 Service Manual

Also see for TK-3148: Service manual

Contents

TK-314834■ The following parts are required for adjustment1. Antenna connector adapterThe antenna connector of this radio uses an SMA terminal.Use an antenna connector adapter [SMA(f) – BNC(f) orSMA(f) – N(f)] for adjustment. (The adapter is not provided asan option, so buy a commercially-available one.)NoteWhen the antenna connector adapter touches the knob,draw out the knob to mount the connector.2. Universal connectorUse the interface cable (KPG-36) for PC tuning or the leadwire with plug (E30-3287-18) and screw (N08-0535-08) forpanel tuning. Connect the plug to the universal connector ofthe radio and tighten the screw.The lead wire with plug (E30-3287-18) and screw (N08-0535-08) terminals are as follows. Numbers are universalconnector terminal numbers.Caution1. When connecting the plug to the universal connector ofthe radio, a short circuit may occur. To provent this, besure to turn the radio POWER switch off.2. Since the RX AF output is a BTL output, there is a DCcomponent. Isolate this with a capacitor or transformer asshown in the figure.3. Do not connct an instrument between red or black andGND.• Universal connector1: SSW3: SP–5: EMC7: PTT9: NC11: 5M13: RXD2: SP+4: MSW6: ME8: PF10: E12: TXD14: EADJUSTMENT / 调整■ 下面是调整时所需的部件1. 天线接口转换头此手持机的天线接口使用 SMA 终端。使用天线接口转换头[SMA ( f ) - BNC ( f ) 或 SMA ( f ) - N ( f )]进行转换。（转换头不作为可选件提供，因此请购买商用转换头。）注释当天线接口转换头接触到其他旋钮时·拔出该旋钮并安装转换头。2．通用接口使用接口电缆（KPG-36）进行PC机调谐或使用带有插头（E30-3287-18）和螺钉（N08-0535-08）的引线进行面板调谐。带有插头（E30-3287-18）和螺钉（N08-0535-08）的引线端点如下所示。号码是通用接口端子号码。注意事项1．将插头与手持机通用接口连接时，可能发生短路。为了避免出现这种情况，一定要关闭手持机的电源开关。2．由于 RX 音频输出是 BTL 输出，所以有一个直流分量。如图所示，用电容或变压器将其隔离。3．在红色或黑色与接地之间不要连接仪器设备。• 通用接口