Samsung MultiXpress K7 Series Service Manual page 397

A3 mono copier
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► Error Code
S1–2111
► Error message
Video System Failure #S1-2111: Turn off then on.
► Symptom
The machine can't detect memory during booting.
► Troubleshooting method
NOTE
To see the troubleshooting video for this error, click through to the link below.
(http://tsp.samsung.com/tsp_file/spds/samsungprinter/K7/Webview/EN_K7_S1-2111.html)
1) Turn the machine off then on.
2) If the problem persists, turn the machine off again.
3) Remove the rear cover.
4) Replace the main board.
NOTE
Insert the MSOK to the new main board.
5) Assemble the rear cover. Turn the machine on.
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4. Troubleshooting
4-146

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