Workstation 4 and 4 LX Field Service Guide
2-3
WS4 Technical Overview
Workstation 4 System Block Diagrams
Figure 2-2 shows a block diagram of the WS4 based on the AB28-I System Board and
the Sharp ‘LG41’ LCD.
Figure 2-2: WS4 Block Diagram /w AB28-I System Board and Sharp LCD Panel
The AB28-I System Board introduces the COM3 Multiplexer in order to fully support
the MICROS LCD Customer Display, introduced in late 2004. More information on
this change can be found on page 2-38.
This configuration, consisting of the AB28-I System Board, Backlight Inverter Board
XB33, and CF Daughter Card XB36, and Sharp LCD were produced between August
2004 and June 2006.
The Sharp LCD includes a built-in LVDS receiver, and does not require the XB34
LVDS Receiver Board. The AB28-I System Board uses different LCD and Backlight
interfaces cables than the AB28-F and AB28-G System Boards. See Chapter 1.
To support the COM3 Multiplexer for the MSR and customer displays, the GR 1.2 (or
later) platform files must be installed on the workstation. The majority of these units
were shipped with the GR 2.0 or 2.1 platform.
