This section lists the exact DC voltages and RF signal levels expected at specific test points (TP) on the main board during both receive (RX) and transmit (TX) modes. Armed with an oscilloscope and a digital multimeter (DMM), you can quickly isolate where a power rail or clock signal has failed. 3. Navigating Schematics and Board Layouts
: Step-by-step instructions for safely opening the unit, including how to handle delicate ribbon cables connecting the 4.3-inch touchscreen. icom ic705 service manual full