Msok System Failure: #S1-2511. Turn Off Then On; Msok Failure: #S1-2521. Call For Service - Samsung CLX-8640 series Service Manual

► Error Code
S1–2511
S1–2521
S1–2523
S1–2530
S1–2540
► Error message

MSOK System Failure: #S1-2511. Turn off then on

MSOK Failure: #S1-2521. Call for service

PPM data is incorrect. Call for service & change MSOK
MSOK Failure: #S1-2530. Call for service & change MSOK
MSOK Failure: #S1-2540. Call for service & change MSOK
► Symptom
MSOK has a problem.
► Troubleshooting method
1) Turn the machine off and on.
2) If the problem persists, turn the machine off again.
3) Remove the rear cover.
(Refer to 3.3.2. Rear Cover.)
4) Check if the MSOK is inserted correctly. Remove and reinstall it.
5) If the problem persists, replace the main board(JC92–02516).
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4. Troubleshooting
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