Peripheral Related - Micros Systems Workstation 4 LX Service Manual

Peripheral Related

IDN Port Problems
Symptoms: When using the WS4LXDiagUtility IDN Print test, or attempting print
from the application, the IDN printer does not print or prints erratically. In other cases,
printing may occur, but the application does receive confirmation. The following
assumes you are working with a patch cable and IDN printing device that is known to
be functional.
• One or more open fuseable resistors, fuses, or clamping diodes in the IDN circuit.
On all system board revisions, the CF Daughter Card must be removed to access
these devices.
• RS422-A COM4, CN7 - Fuses: F2 thru F5 / Diodes: D7, D8, D16 and D17.
• RS422-B COM5 CN8 - Fuses: F6 - F9 / Diodes: D9 thru D12.
• Defective RS422 Transceiver. If the fuseable resistors and clamping diodes above
check out, the associated Transceiver could be damaged.
• RS422-A COM4 - Replace U11 and U12.
• RS422-B COM5 - Replace U7 - U8.
• If the WS4 LX serial number is less than 7220007150, a metal tab under the
system board may need to be removed. Refer to FB07-002 for more information.
• Defective or damaged IDN Module in the printer.
• Substitute the IDN module.
RS232 Peripheral Device Does Not Function
Symptom: An RS232 peripheral connected to the RS422-A or RS422-B port does not
function.
• Examine the pins on the 8-pin modular connector(s). If a 6-pin RJ-11 connector is
plugged into the 8-pin port, the smaller connector body can push the RS232 pins
(1 and 8) out of position. Later, when the RJ-11 connector is removed, the pins do
not spring back into position, preventing the RS232 interface from functioning.
In most cases, this does not permanently damage the interface; the RS232 pins can
be carefully moved into the correct position by using a dental pick or other long
sharp object.
Workstation 4 and 4 LX Field Service Guide
WS4 LX Troubleshooting

Peripheral Related

5-19