9.4.4 Receiver
Circuit Principle Diagram
Circuit analysis:
If the circuit is the direct power supply chip circuit output, external 32 ohm headphones.
Fault analysis and treatment process:
First confirm the receiver itself is good, can replace the test, receiver uses the shrapnel
crimping, confirm the good and PCBA pressure, the contact point should be clean, no dirt;
pathway finally check voice signal AU_HSP, AU_HSN and power supply chip, according to bad
welding or more power supply chip.
To Next Page
Loading...
