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DZ1200 LCD access circuit block diagram
Fig 7
LCD unit
Data bus
Controller
Control bus
+5V
Operation power supply
Contrast power supply
-10~ -13V
Backlight power supply
+5V
DZ1200 reset circuit block diagram
Fig 8
+3.3 V power supply
IC20
+1.8 V power supply
Three-terminal
regulator
+5 V power supply
MAIN
IC9
Voltage conversion
LVX4245
IC1, 19
Voltage conversion
+5 V power supply
Contrast
voltage control
-15 V power supply
IC8
Three terminal
regulator
+1.8V
IC14
Scratch microcomputer
DSC25
RESET
IC11
+2.9V
monitoring IC
IC10
+1.6V
monitoring IC
DE
IC6
+4.5V
monitoring IC
RESET
+5V
IC2
UI microcomputer
M30622
Data bus
Control bus
PWM
IC23
FLASH
ROM
Image data
+7V
+3.3V
+1.8V
+3.3V
IC34
Media microcomputer
DSC25
GIO
RESET
General purpose output
Q5
Refer to the item "Signal flow", LCD.
IC14
Scratch microcomputer
DSC25
Refer to the item "Signal flow", reset circuit.
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