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MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927
Page 4
CIRCUITRY BLOCK DIAGRAMS ..................................................................................................... 63
Main Power Supply ....................................................................................................................... 63
Lamp Ballast DC Supply ............................................................................................................... 64
Fans Power Supply....................................................................................................................... 64
Optical Engine Power Supply........................................................................................................ 65
HDD Power Supply ((V30+ & V31 Only)........................................................................................ 65
Analog Video Signal Path ............................................................................................................. 66
Digital Video Signal Path .............................................................................................................. 67
HDD Record Signal Path............................................................................................................... 68
Sound Signal Path ........................................................................................................................ 69
Command Input Circuitry............................................................................................................... 70
Serial Data Control Lines .............................................................................................................. 70
Lamp Control Circuitry .................................................................................................................. 71
Lamp, Engine and Fan’s Protect circuitry ..................................................................................... 72
TV Guide On Screen®................................................................................................................... 72
SCHEMATIC DIAGRAMS .....................................................................................................................