Theory of Operation 8
16900A, 16902A, and 16903A Service Guide 123
Front panel assembly
The front panel assembly block diagram shown here
includes;
• LCD display
• Touch screen board and grid
• Keypad board
For more information on the front panel assembly to to
page 128.
16903A CPU Subsystem
CPU board
The CPU motherboard is a standard microATX configuration
with 512 MB of system RAM. The exact CPU and speed
grade will vary over the life of the product. Standard I/Os
FRONT PANEL
BOARD
MIB BOARD
CONNECTOR
TOUCH SCREEN
BOARD
INVERTER
BOARD
TOUCH SCREEN
GRID
KEYPAD
BOARD
LCD DISPLAY
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