Service manual

3
Model No: 21WHS3-Bn
Version 1.0
CONTENTS
SAFETY NOTICE ................................................................................................................................... 4
GENERAL DESCRIPTION .................................................................................................................... 6
TECHNICAL SPECIFICATION ............................................................................................................. 7
GENERAL SPECIFICATION................................................................................................................. 8
SAFETY CAUTIONS FOR PRODUCTS ............................................................................................... 9
ADJUSTMENT MODE ......................................................................................................................... 10
CHASSIS BLOCK DIAGRAM ............................................................................................................. 15
FAULT FINDING TREES..................................................................................................................... 16
IC BLOCK DIAGRAM ......................................................................................................................... 23
MAIN CHIP INSTRUCTION................................................................................................................ 24
FACTORY MENU
................................................................................................................................ 45
EXPLODED VIEW AND PART NAME .............................................................................................. 48
BOM LIST ............................................................................................................................................. 49
CIRCUIT DIAGRAM............................................................................................................................ 58