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Theory of Operation
AM700 Audio Measurement Set Service Manual
3–81
+1.235V
B00
B01
B02
B03
G00
G01
G02
G03
R00
R01
R02
R03
B0
B1
B2
B3
G0
G1
G2
G3
R0
R1
R2
R3
U5
U1
U13
U4
U12
U11
U9
U10
U3
U8
U6
U7
DLYDHSYNC
DLYDHSYNC
DLYD25MCLK
HSYNC
VSYNC
Latch
Latch
DLYD25MCLK
DLYD25MCLK
To
LCD
+5LCD
NBH
ENAB
NBV
DLYD25MCLK
Red
ADC
Green
ADC
Blue
ADC
LCD Backlight
Brightness
Control
Inverter
Gain
Adjust
Gain
Adjust
Gain
Adjust
Power
Supply
Power to
LCD Backlight
Inverter
DLYD25MCLK
Offset
+15V
+13VLCD
Blue
Green
Red
Feedback
+5V
Offset
Offset
V Ref
Clock
Delay
DLYD25MCLK25 MHz Clock
HSYNC
VSYNC
DLYD25MCLK
DLYD25MCLK
PAL
Feedback
Feedback
Figure 3–21: LCD driver board block diagram