Micros Systems Workstation 5 - COM1 RS232 Port; COM5 RS232 Port; Mag Stripe Reader Interface

3-32 Workstation 5 Field Service Guide
Workstation 5 Troubleshooting
Peripheral Related
COM5 RS232 Port
Symptom: An RS232 peripheral connected to this modular COM port does not
function.
• Examine the 8-Pin modular connector looking for pins that may be pushed
out of position. Carefully move the pins into the correct position if
necessary.
• Defective Interface Circuit
o RS232 Line Driver/Receiver U12.
o UART - Super IO U8.
COM1 RS232 Port
Symptoms: An RS232 peripheral connected to this DB9 COM port does not
function.
• Defective Cable.
• Defective Interface.
o RS232 Line Driver/Receiver U5.
o UART - Super IO U8.
Mag Stripe Reader Interface
Symptoms: The Internal Mag Stripe Reader does not function in the Diagnostic
Utility or Application.
• Mag Card Reader Connector not attached to CN14 or damaged connector.
• Mag Stripe Card Reader Cable pinched or damaged.
• Defective Mag Stripe Reader Assembly.
• Defective System Board Interface Circuit.
o Level Shifters U13 and U14. Inverter U11.
o UART - Super IO #2 - U35.