Samsung ML-2851ND/XAZ Service Manual page 96

2) LSU Error
Description: "PMOTOR ERROR/HSYNC ERROR'
1. Check whether the LSU
connector is disconnected or not.
2. Check whether the LSU
3. Check the HSYNC signal.
Service Manual
Alignment & Troubleshooting
motor is rotating or not.
Replace a LSU
Replace a main board if the same
error occurs again after replacing
a LSU.
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Samsung Electronics