IBM 4247 Maintenance Information page 207

If an error message is displayed, go to "T&D Error Messages and Actions – Models 001, 002, and 003" on
page 231 . The test completed successfully if the display advances to the next test number.
T&D08 - Microcode Test
Display:
T&D08 Microcode Test RUN TEST ? YES END NO
If an error message is displayed, go to "T&D Error Messages and Actions – Models 001, 002, and 003" on
page 231. The test completed successfully if the display advances to the next test number.
T&D09 - Serial Attachment Test – Model 003 with the Serial Card Installed
The serial loop-back connector needs to be installed for this test. There are 2 serial loop-back connectors: the
RS-232 and RS-422. The RS-232 connector is installed first. The display will prompt you to remove the RS-232
connector and install the RS-422 loop-back connector.
If a loop-back connector is not installed, an error message will be displayed.
T&D09 Serial Attachment Test
RUN TEST? YES END NO
1. Install RS-232 connector.
2. Press Line Feed key.
3. When prompted, remove the RS-232 connector and install the RS-422 connector.
4. Press the Line Feed key.
5. If an error message is displayed, go to "T&D Error Messages and Actions – Models 001, 002, and 003" on
page 231.
6. The test completed successfully if the display advances to the next test number.
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Chapter 2. Diagnostics