Samsung ProXpress M453x series Service Manual page 171

► Error Code
M1–3122
► Error message
Tray 1 cassette is pulled out. Insert it properly.
► Symptom
Tray1 is not installed properly.
► Troubleshooting method
1) Install the tray1. If the tray1 is already installed, remove and reinstall it.
2) Check if the harness connection for cassette detection is normal. Reconnect it. If the harness is defective, replace it.
3) Check if the cassette detection sensor(JC34-00001A) is defective, replace it.
Copyright© 1995-2017 SAMSUNG. All rights reserved.
4. Troubleshooting
4-76