Samsung MultiXpress K7 Series Service Manual page 475

4. Troubleshooting
b) If the top skew is like a below sample (@AS chart, 1.5mm counterclockwise direction skew), rotate 'S' screw one
turn and 'R' screw a half turn in a counterclockwise direction.
NOTE
The combination of 'S' screw one turn and 'R' screw a half turn must be kept.
4) Reassemble in reverse order of disassembly.
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