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Diagnosing TI 880 printer problems:
| Problem/customer complaint | Possible corrective action |
| 1. Weak or no paper advance. | 1st: Replace print-controller/driver board. 2nd: Replace paper advance motor. |
| 2. Margins drift. 3. Printhead jerks then stops. | Replace carriage motor. |
| 4. Very slow printhead movement. | 1st: Clean carriage bar with alcohol. (Never lubricate or use oil.) 2nd: Replace carriage motor. |
| 5. Printhead slams. | 1st: Replace driver board. 2nd: Replace carriage motor |
| 6. Ribbon not turning. | 1st: Move slotted actuator post back and forth a few times to reseat switch. 2nd: Check fuse under board cover. 3rd: Replace ribbon drive assembly. 4th: Replace print controller/driver board. |
| 7. Blows fuse F5. | 1st: Disconnect power supply from mother board, replace fuse then power up: Fuse blows - replace power supply. Fuse good - Replace print controller/driver. |
| 8. Won't communicate or printing garbage. | 1st: Check all interface cables and connections. 2nd: Check set-up parameters 14, 28, 36 etc. 3rd: Replace applications controller. |
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