Canon TM-200 Online Manual page 355

7. Examine the test pattern for adjustment. Determine the straightest set of lines.
In the example in the figure below, select "+2" in pattern (C).
8. Open top cover and move angle adjustment lever to match number (or square) of
straightest set of lines.
If no single set of lines is perfectly straight, move the angle adjustment lever to a position between the
numbers (or between the number and the square) of the two sets of lines that are least misaligned.
9. Close the top cover.
The print head is now straight, and adjustment is complete.
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