Q120 TV Maintenance Manual
8
2
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Fault maintenance
Note:
The PCBA repairing is a very important work during the final production of cellular
phones. The speed and quality of repairing decides the yield and production efficiency.
The repair idea is very important for a good repairing technician. Make sure not to
heat a board right away once a phone reaches at hand.
Summary of Contents for Q120 TV
Page 3: ...Q120 TV Maintenance Manual 3 1 Circuit diagram instruction 1 1 Main board explored view...
Page 6: ...Q120 TV Maintenance Manual 6 1 5 Function circuit FM circuit U802 FM receiving chip RDA5802E...
Page 7: ...Q120 TV Maintenance Manual 7 BT circuit U701 BT receiver chip MT6612CN L...
Page 10: ...Q120 TV Maintenance Manual 10 3 2 No ring tone...
Page 11: ...Q120 TV Maintenance Manual 11 3 3 LCD display fault...
Page 12: ...Q120 TV Maintenance Manual 12 3 4 Charging fault...
Page 14: ...Q120 TV Maintenance Manual 14 3 6 Fail to identify SIM card...
Page 15: ...Q120 TV Maintenance Manual 15 3 7 MIC fault...
Page 18: ...Q120 TV Maintenance Manual 18 3 10 Vibrate fault...
Page 19: ...Q120 TV Maintenance Manual 19 3 11 FM fault...
Page 23: ...Q120 TV Maintenance Manual 23 3 15 Unable to use USB END...