Icom IC-7100 Advanced Instructions - Page 354

Previous view 19 MAINTENANCE External keypad connections Connect an external keypad to the MIC connector to u GND control the keyer memory (M1 to M4), RTTY memory (RT1 to RT4) or TX voice memory (T1 to T4). You can send a memory keyer, RTTY memory or voice memory without selecting the screen of the CW memo- i w MIC U/D q ry, RTTY memory or voice memory. 1.5kø ±5% S1 When using a external keypad, set the "External Keypad" item of the "Connectors" Set mode, as described below: • For the CW memory keyer, set the "KEYER" item to ON. • For the RTTY memory, set the "RTTY" item to ON. • For the TX voice memory, set the "VOICE" item to ON. 1.5kø ±5% S2 2.2kø ±5% S3 4.7kø ±5% S4 USER BOX An external keypad should be purchased separately. External keypad Band voltage modification The transceiver does not output the band voltage from the [ACC] socket by default because there is no option that the band voltage is required. The band voltage is output from pin 5 of the [ACC] socket after bridging the solder pad, as shown to the right. Or, you can output the band voltage by making the following band voltage generator circuit. The following band voltage table is for reference only. Please adjust and check with the actual operating results. 11 9 BAND 10 CP42 8 7 6 CP6106 1 CP6101 CP6102 2 12 5 4 3 11 BAND Bridge here CP42 4519 CP6502 Transceiver's bottom view with the bottom cover removed. • Band voltage generator circuit The circuit below is just for reference. ACC socket of an optional unit 7 6 3 1 5 24 GND 8V 4700pF BAND Diode 100µH 4700pF 4.7kø 4700pF 100µH VR 4.7kø VR 4.7kø Open VR 10kø VR 10kø VR 22kø External power souce 8V 1.9MHz 3.5MHz Rotary switch 7MHz 10MHz 14MHz 18/21MHz 24/28MHz BAND 1.9 MHz 3.5 MHz 7 MHz 10 MHz 14 MHz 18/21 MHz 24/28 MHz VOLTAGE No adjustment 6.1 V 5.1 V No adjustment 4.1 V 3.1 V 2.1 V 19-11