Q346
L3 Service Manual
D)
Symptoms
Please Provide PCBA Level repair process for below symptoms level with PCBA component images and Schematic
diagrams
1、Unable to load Software:
It might be the poor soldering of USB (J609) Connector, please check the soldering quality of USB (J609)
Connector first, and then check the related diagram.
Solution：
1. Use a fresh data cable.
2. Check the USB (J609) connector and its soldering quality, and then check the volume of J607.
3. Re-Solder the USB (J609) connector.
4. Re-Solder the 26M(X901) crystal or change it.
5. Re-Solder the CPU (U0100) or change it.
