Samsung ML-451 Series Service Manual page 150

4. Alignment and Troubleshooting
► Error Code
H1–1222
H1–1322
H1–1422
H1–1522
► Error message
Tray2 cassette is pulled out. Insert it properly.
Tray3 cassette is pulled out. Insert it properly.
Tray4 cassette is pulled out. Insert it properly.
Tray5 cassette is pulled out. Insert it properly.
► Symptom
A optional cassette (SCF) is pulled out.
► Troubleshooting method
1) Check if the optional cassette is inserted properly. Remove the cassette then re-install it.
2) Check if the Signal-Switch is deformed or broken. If it is defective, replace it.
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