IBM 4247-003 Maintenance Manual - Page 167
T&D08 - Microcode Test, T&D09 - Serial Attachment Test, T&D10 - Stacker/ASF Test
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T&D08 - Microcode Test Display: T&D 08 USER If an error message is displayed, go to "T&D Error Messages and Actions" on page 190. The test completed successfully if the display advances to the next test number. T&D09 - Serial Attachment Test The serial loop-back connector needs to be installed for this test. There are 2 serial, loop-back connectors. The RS-232 connector is installed first. When prompted by the display, 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. To bypass this message, press the Micro ↓ key twice to advance to the next test. Display: T&D 09 USER INSERT 422 LOOP 1. Remove the RS-232 connector, install the RS-422 connector, and press the Micro ↓ key. 2. If an error message is displayed, go to "T&D Error Messages and Actions" on page 190. 3. The test completed successfully if the display advances to the next test number. T&D10 - Stacker/ASF Test Note: The stacker/ASF loop-back connector needs to be installed for this test. This connector tests the stacker and ASF circuits. Chapter 2. Diagnostics 167
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