Xerox DocuColor 12/DCCS50 Service Manual page 1448

LCD BACK-
LIGHT POWER
CONTRAST SUPPLY PWBA ANALOG TOUCH PANEL (TOP);
CONTROL LCD PWBA/DISPLAY;
PWBA LCD BACKLIGHT LAMP;
UI BASE PWBA (BOTTOM)
Figure 2 User Interface Assemblies Locations
Principles of Operation
Overview, User Interface Base PWBA
User Interface Base PWBA
The UI Base PWBA contains the logic to control the remaining assemblies in the UI. As shown
in Figure 1, this PWBA includes three microcontrollers:
• a PWBA Microcontroller
• an LCD Display Microcontroller
• a Control Panel/Touch Panel Microcontroller
KEYPAD /LED
PWBA
1/05
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