Ricoh B173 Service Documentation page 85

4.5.10 VERTICAL LINES CURVED
Description
When printing, vertical lines curve.
Check and Cause
If the supply of +24v is unstable in the
Main Board linking with LSU, check
drive by Engine Test Mode: Diagnostic
Code Check -1- LSU Motor on.
SM
PRINTING PROBLEMS
Solution
Replace LSU.
Replace the Main Board.
4-19 B173