OPPO R17 loudspeaker has noise for repair

Machine model: OPPO R17

Fault phenomenon: the customer said that the screen was broken and replaced the screen assembly, but after changing the screen, there was a noise in the horn, so the sound could not be heard clearly.

Repair process: disassembly mobile phone, it was found that the charging connector small board was leaking copper when changing the screen.

OPPO R17 loudspeaker has noise for repair figure 1.

Replace the horn, the fault remains.Replace the charging connector small board, the test is normal, indicating that there is something wrong with the charging connector small board.insulation and shield the copper leakage place of charging connector small plate with Solder Mask. After treatment, install charging connector small plate and small plate to fix screen Glass.After startup test, there is no noise from the speaker, and the fault is successfully repaired.