IBM 4230 User Guide - Page 219

Bidirectional Adjustment You can adjust dot registration and print quality for characters created using bidirectional printing. The bidirectional alignment may need periodic adjustment to maintain print quality. To change the bidirectional alignment, follow these steps: 1. Enter the Operator Print Tests (see "General Test Instructions" on page 5-1). The printer displays OPERATOR PRINT TESTS Printer Demonstration 2. Press Scroll ↓ or Scroll ↑ until the printer displays OPERATOR PRINT TESTS Bidirectional Adjustment 3. Press Enter or Start to begin the test. The Ready indicator goes on and printing begins. The test prints samples using alignment values higher and lower than the default value. The print sample using the default value is * indicated with an asterisk ( ). The alignment printout is complete when the Ready indicator goes off. The printer displays Bidirectional Adjustment ᑍ Chapter 5. Tests 5-19