Do not touch the PA transistor until you read Section 4.3.2. The exclusive manual explicitly warns: "Do not attempt to adjust RV201 (power set) without a calibrated wattmeter." It then provides the exact alignment sequence using DMM and RF probe at J601 .
This guide provides a deep dive into the technical architecture, alignment procedures, and troubleshooting steps typically reserved for certified technicians. 1. Overview of the Motorola GM3688 motorola gm3688 service manual exclusive
In the Tuner software, adjust the "Ref Osc" value until the transmit frequency matches the target frequency (e.g., 145.000 MHz) within ±200 Hz. Transmitter Power Tuning The GM3688 allows for high and low power settings. Do not touch the PA transistor until you read Section 4