Samsung CLX-8640 series Service Manual page 395

► Error Code
S7–2110
► Error message
Fuser Failure: #S7-2110. Turn off then on
► Symptom
Machine makes relay off because of abnormal heater control.
► Troubleshooting method
1) Turn the machine off. Re-install the fuser unit, then turn the machine on.
(Refer to 3.2.4 Fuser unit.)
2) If the problem persists, turn the machine off.
3) Replace the fuser drive
4) If the problem persists, replace the main board(JC92–02516A)
5) If the problem persists,
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board(110V: JC44-00210A, 220V: JC44-00211A)
4. Troubleshooting
4-236