IBM 4247-003 Maintenance Manual - Page 212
AFTA Errors, Running T&D12, get the message TD12 FRU 3 [14] PRESS A KEY.
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7. Verify the gap between the carriage casting and the platen, as described in Standard AFTA Service Check and Adjustment. 055 AFTA Errors: If your printer is getting a 055 AFTA ERROR message that is caused by a bad #5B printhead needle, the printer will display these messages: v During normal operation: With the AFTA=0 mode, you perform a paper load operation, but get a 055 AFTA ERROR message. or v During T&D12: With the AFTA=0 or the FIXED=1 mode, you begin the AFTA Calibration portion of T&D12, but get the message TD12 FRU 3 [14] PRESS A KEY. To determine if the cause of the 055 AFTA ERROR message is a bad #5B printhead needle, follow these steps: 1. Power off (O) the printer, and remove all paper from the printer. 2. Power on (|) the printer and enter the operator menu to change to FIXED=1 mode. 3. Load 1-part paper and print some characters. 4. Examine the DP characters, such as an uppercase H, looking for missing dots. Count down 5 dots from the top of the character. 5. Inspect the printhead cable for damage and a poor connection at the printhead. Replace the cable, if indicated. 6. If the cable is OK, replace the printhead. Running T&D12: v Press the Micro ↑ key to run the test. v Press the Micro ↓ key to skip the test. v Press the Load/Form key to end the test. If T&D11 (Sensor Tuning) was not completed before beginning T&D12, the following message displays: PINCH XXXXX Chapter 2. Diagnostics 212
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