21
5. Sound problem
No
Check the cable between the
speakers and main board is OK?
No sound or sound abnormal
Check the TV is muted, adjust the
volume or enter the menu to reset?
Reinsert the audio cable or
change the TV system
Replace the cable
Replace the speaker
Replace the main board
No
Yes
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Check the audio source connection
and the TV system are correct?
Yes
No
Yes
No
Enter factory mode to do “Reset”
No
Summary of Contents for LY19Z6
Page 11: ...11 Step5 Unscrew the 11 screws as red circle to remove MAIN BD KEY COVER BKT and Side_I O BKT ...
Page 12: ...12 Step6 Separate the BEZEL PANEL and KEY BD Disconnect the FFC CABLE The PANEL ...
Page 15: ...15 Step5 Unscrew the 3 screws as red circle to remove BKT KEY BD and KEY COVER ...
Page 16: ...16 Step6 Separate the BEZEL and PANEL ...
Page 24: ...24 6 PCB Layout 6 1 Main Board 715G4035M0A001005F ...
Page 25: ...25 ...
Page 26: ...26 ...
Page 27: ...27 ...
Page 28: ...28 6 2 Power Board 715G4051P01000004S ...
Page 29: ...29 LYF24Z6 715G4820P02000004S ...
Page 30: ...30 6 3 Key Board 715G4251K01000004S 715G4168K02000004S ...
Page 31: ...31 6 4 IR Board 715G4169R01001004S ...
Page 43: ...43 8 Block Diagram ...
