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Error code reference
Samsung Multifunction Printer Error Code U1-2340
Fuser unit temperature control abnormal (Over Heat Error).
SourceSamsung SCX-483x/563x/573x - Full Service Manualp. 4-48
Diagnostic procedure
The full U1-2340 procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Turn the machine off, re-install the fuser unit, then turn on; check fuser connector and thermistor.
SourceSamsung SCX-483x/563x/573x - Full Service Manualp. 4-48
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented
1 manual in the MyPros+ library documents this code for Samsung multifunction printer.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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