IBM 6400-I15 Maintenance Manual - Page 16

Important Maintenance Notes ATTENTION Failure to observe the following guidelines can result in damage to the equipment. To ensure the best performance of the printer, remember these important maintenance concepts when you service the printer: ♦ Do not adjust the platen gap unless the original shuttle frame assembly or platen has been replaced with a new or rebuilt unit, or unless instructed to do so in the troubleshooting chapter. ♦ Never bend or "tweak" hammer springs. Always handle hammer springs by the thick mounting base. The hammer springs and hammer tips are delicate and precisely aligned. ♦ Use only the ribbons specified in Appendix B. Use of incorrect ribbons can lead to ink migration problems, degraded print quality, and expensive damage to the printer. ♦ Do not close the forms thickness lever too tightly. Closing the forms thickness lever too tightly can lead to smearing, degraded print quality, paper jams, and damage to the platen and shuttle assembly. About This Manual This is a field service maintenance manual. It is designed so that you can quickly locate maintenance information. How to Use This Manual 1. Find the procedure or information you need in the Table of Contents or the Index. 2. Read the entire procedure before you do it. 3. Gather the parts and tools you will need. 4. Make sure you understand all safety notices before you start a task. Notes and notices are defined below. 16 Maintenance Overview