Samsung PS42S5HX/XEH Service Manual page 99

■ Drive Circuit Operating Block Diagram
- Y Drive Board
Logic Signal Input Part
Logic Signal Buffer
- X Drive Board
■ Requisite Components Necessary for Drive Board Operation
- Power : Supplied from the power board. The optimal value may differ from the following:
a) Vs : 205V - Sustain
b) Vset : 195V - Y Rising Ramp
c) Ve : 100V - Ve bias
d) Vscan : -190V - Scan low bias
e) Vnf : -175V - Y falling Ramp (Created by the DC-DC power block of the Y Drive board)
f) Vsc_h : -70V - Scan high bias (Created by the DC-DC power block of the Y Drive board)
g) Vdd : 5V - Logic signal buffer IC and IPM
h) Vcc : 15V - Gate drive IC ¹× IPM
- Logic Signal : Supplied by the Logic board. Gate signal of each switch
Samsung Electronics
Power Input Part
Logic Signal Input Part
Logic Signal Buffer
Power Input Part
Circuit Description
13-13