The power supply of G59 consists of four sections. The components in each section are marked with letter S in suffix. Schematic diagram Click Picture to Enlarge Section 1: Install DC1S, C1S, C2S Section 2: Install C1S, R1S, C3S, C4S, C5S, C6S, C7S, C11S, C8S, IC2S, IC1S Install the following components: R7S, R8S, C10S, C11S, C12S, LED1S, LED2S Pay attention to orientation of LED diodes. The longer lead is anode (+). Section 3 Install Install the following components: C13S, C26S, C27S, C28S, C29S, C30S, C31S, R5S, R6S, IC5S Section 4 Install the following components: R2S, R3S, R4S, C15S, C16S, C17S, C18S, C19S, C20S, C21S, C22S, C24S, C25S, C26S, IC3S, IC4S Voltage check 1. Connect 12V DC power supply to plug DC1S. Note: Do not exceed input voltage of 13.8V. Do not use / connect laptop power supply because they provide much higher voltage which could cause permanent damage to G59 board. Pay attention to polarity! 2. Check the voltage on pin 1 of DC2S connector (12 - 13.8V).   3. The green LED1S will light. 4. Check the voltage on middle pin of IC5S (2.5V). 5. Check the voltage on outer pin of IC3S (5V) and on middle pin of IC4S (2.5V). This completes the first phase of the G59 assembly. Block Diagram | Phase 1: Power Supply | Phase 2: Microcontroller circuit | Phase 3: Local osciallator Si570 | Phase 4: G59 USB connection | Phase 5: G59 Receiver assembly | Phase 6: G59 Input-Output HP-LP Filters | Phase 7: Band pass filters and control logic | Phase 8: CW monitor | Phase 9: Transmitter circuits assembly | Phase 10: Microphone preamplifier | Phase 11: Si570 Quasi oven circuit | Phase 12: G59 Receiver Image Calibrator | GBOX assembly

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