If the OBDSTAR X300 Classic G3 fails to turn on normally, how to solve it?
The possible cause is that the U17 and L8 are damaged and causing a short circuit. Please follow the guide below to detect the resistance and repair the device by replacing U17 and L8 components.
The solution:
Step 1: Remove the Outer Shell
Carefully take off the rubber protective case of X300 Classic G3.
Then, use a screwdriver to loosen and remove the fixed hex screws securing the back cover.
Step 2: Disconnect the Battery
Open the back cover
Press down on the battery connector clip and pull out the battery connector to safely disconnect power.
Step 3: Test for Short Circuit
Set your multimeter to the ohms (Ω) range
Measure the resistance across both terminals of capacitor C75.
- A reading of approximately 0Ωindicates a short circuit.
- This suggests that components U17 and L8 may be damaged and need replacement.
Step 4: Remove Damaged U17 and L8
Use a soldering iron or a hot air rework station (set to 350 ± 10°C)
Carefully desolder and remove the damaged U17 and L8 components
Replace L8 with a 1μH inductor of compatible size and rating.
Step 5: Confirm Repair
After replacing the components, recheck capacitor C75 using the multimeter.
- A proper reading should be around 1.36kΩ, confirming the short circuit has been fixed.
Step 6: Reassemble and Test
Reconnect the battery connector
Reinstall the back cover and power on the OBDSTAR X300 Classic G3 Key Programmer.
If it starts normally, the repair was successful.
Step 7: Reinstall Back Cover
Secure the back cover with screws and reattach the rubber protective case.
Your OBDSTAR X300 Classic G3 is now fully repaired and ready for use.
Read also:
How to Replace OBDSTAR X300 Classic G3 motherboard?
How to Replace OBDSTAR X300 Classic G3 Motherboard for Repair?
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