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petak, 18.04.2025.

OBDSTAR X300 Classic G3 Startup Failure Repair Guide

If your OBDSTRA X300 Classic G3 device won't start, don't worry! Follow this step-by-step guide to troubleshoot and fix the issue by checking key components like the battery, U17 chip, and L8 inductor.

Tools Required
Screwdriver (hex-compatible)
Multimeter
Soldering iron or hot air gun (temperature adjustable)
Replacement components: U17 (IC) and L8 (1µH inductor)

Step 1: Remove the rubber case. Then, use a screwdriver to loosen and remove the fixed hex screws.

Step 2: Open the back cover, press down on the battery connector clip with your hand, and then pull out the battery connector.

Step 3: Use a multimeter set to the ohms range to test the two ends of capacitor C75. If the resistance is around 0©, it indicates that U17 and L8 are damaged and are causing a short circuit. Replace U17 and L8.

Step 4: Use a soldering iron or hot air gun set to 350 ± 10°C to desolder and remove U17 and L8. (Replace L8 with a 1uH inductor.)

Step 5: After the replacement, use the multimeter set to the ohms range to test the two ends of capacitor C75 again. If the resistance is approximately 1.36K©, it confirms that U17 and L8 have been successfully replaced.

Step 6: Insert the battery connector, reassemble the back cover, and press the power button to turn on the device. If it starts up normally, the replacement is successful.