59
9. Earphone silence
YES
YES
NO
YES
NO
YES
NO
YES
Repair or replace the earphone
Replace MB
Check if the earphone is
damaged
Earphone has no sound
OK
Check the pin of USB
port is soldered
Solder the USB port
Clean the matter
Check if there is some
matter in the earphone
interface
Repair the MB referring to the
troubleshooting guide for L3 repair
Summary of Contents for HARLEY TAB A3-A20
Page 1: ...1 HARLEY TAB A3 A20 A3 A20FHD SERVICE GUIDE ...
Page 9: ...4 Tablet Tour Six View ...
Page 13: ...8 Bottom View Figure 1 4 Bottom View ...
Page 15: ...10 Right View Figure 1 6 Right View ...
Page 16: ...11 System Block Diagram ...
Page 25: ...20 Operating demonstration as below ...
Page 29: ...24 Always install this driver program software I ...
Page 32: ...27 3 3 Config parameters ...
Page 33: ...28 Password 20120405 ...
Page 35: ...30 3 4 Write Number 3 4 1 Enter operation interface input CSN Number and Click Write button ...
Page 40: ...35 Select Connectivity tab choose item Wifi See Figure 2 Figure 2 ...
Page 41: ...36 Choose item Tx see Figure 3 Figure 3 ...
Page 43: ...38 Figure 5 ...
Page 68: ...63 CHAPTER 4 Diagnostic Tool SOP Diagnostic Tool SOP Product Team Date 2014 07 29 ...
Page 79: ...74 Test result interface as below ...
Page 81: ...76 Picture A Picture B Picture C ...
Page 105: ...100 Exploded Diagram and Description ...
Page 106: ...101 ...