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POWER-ON SELF TEST
4.7 POWER-ON SELF TEST
4.7.1 PARALLEL LOOP-BACK TEST
This tests the standard IEEE1284 parallel interface using a loop-back connector.
The loop-back connector (P/#: G0219350) is required for this test.
NOTE: Do not use the loop-back connector (P/#: G0109350). This loop-back
connector causes the "Timeout error".
1. Turn off the machine and attach the loop-back connector to the Centronics
parallel interface.
2. Turn on the machine.
• Regardless of the test result, the controller starts up as normal.
3. Enter the SP mode and check the "Diag. Error" for the error codes 1101 or
1102.
• Refer to the section 4.3.3 "Printer Controller Service Mode" for how to check
the error codes.
• Refer to the section 7.2 for the details of error codes.
4.7.2 OTHER TESTS
The controller tests the following devises at power-on. If an error is detected, an
error code is stored in the NVRAM. Refer to the section 4.3.3 for how to check the
error codes, and the section 7.2 for the details of error codes.
• Flash ROM (Firmware)
• CPU, Clock and ASIC
• Resident and optional SDRAM
• Centronics interface (if a loop-back connector is present)
• NVRAM
• Font ROM
• Optional HDD
4-28
1 October, 1999
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