LG S90QY - Section 4 Wireless Subwoofer Part

4-1
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Only for training and service purposes.
SECTION 4
WIRELESS SUBWOOFER PART
CONTENTS
WIRING DIAGRAM ............................................................................................................................................ 4-2
BLOCK DIAGRAM ............................................................................................................................................ 4-3
ONE POINT REPAIR GUIDE ............................................................................................................................ 4-4
1. POWER ON ERROR .............................................................................................................................. 4-4
2. WIRELESS CONNECTION .................................................................................................................... 4-5
WAVEFORMS OF MAJOR CHECK POINT ...................................................................................................... 4-6
1. CRYSTAL ................................................................................................................................................ 4-6
2. FLASH MEMORY ................................................................................................................................... 4-6
3. PVDD ...................................................................................................................................................... 4-7
4. PWM ....................................................................................................................................................... 4-8
5. LED ......................................................................................................................................................... 4-9
PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 4-11
1. SUBWOOFER P. C. BOARD ................................................................................................................ 4-11