Customer Display Interface - Micros Systems Workstation 5 Service Manual

Customer Display Interface

Symptoms: The Integrated or Pole Customer Display does not function. The
unit should auto-detect the LCD or IEE 2x20 VFD customer display at
power-up. If a customer display is not detected after several power-up cycles,
you can check the following.
• Internal customer display cable disconnected from J2 or IO panel
connector damaged.
• Damaged Pole Customer Display Connector CN4.
• No Power to Customer Display Connector.
Make sure +5V appears at J2-1. If not, check voltage switch Q27, Q15
o
and F2.
• Defective Interface circuit.
Multiplexer U10, NOR Gate U4A and U4C, and Level Shifter U3.
o
Workstation 5 Field Service Guide
Workstation 5 Troubleshooting
Peripheral Related
3-33