FLY FS501, Руководство по обслуживанию, Страница: 19 / 29

FLY SERVICE SUPPORT
2) software problems, itself boot ringtones;
(2) Receiver circuit
FS501 phone receiver is embedded in the mobile phone front shell through shrapnel and motherboard connection.
Mainly used for the call. Receiver circuit diagram as shown below.
Receive Loop
Receiver Common faults and reasons ：
1, Receiver without sound:
1) Receiver assembly adverse, the shrapnel and board poor contact
2) Receive ontology bad
3) the volume settings or software problems
2, Receiver noise or volume:
1) Receiver incoming material, whether caused by pad short circuit
2) relevant components have solder skips
3) software problems
(3) Mic loop
The AW660A contains two MIC circuits, the main MIC and headphone MIC. The main MIC was inserted
needle. Loop schematic diagram as following:
Main MIC common faults and causes
1 MIC unable to send words or recording: