Samsung MultiXpress K7 Series Service Manual page 402

4. Troubleshooting
► Error Code
S1–4311
► Error message
Video System Failure #S1-4311: Turn off then on.
► Symptom
The USB device chip is defective.
► 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_S1-4311.html)
1) Turn the machine off then on.
2) If the problem persists, turn the machine off again.
3) Replace the OPE hub board.
4) Turn the machine on.
► Error Code
S1–5221
► Error message
Wireless network card is not installed. Install the card
► Symptom
Wireless network card is not installed correctly.
► 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_S1-5221.html)
1) Check if the WLAN card is installed correctly. If necessary, re-install or replace it with new one.
► Error Code
S1–5521
► Error message
FDI device is not installed. Install the device
► Symptom
FDI device was removed.
► Troubleshooting method
1) Check if the FDI is installed correctly. If necessary, re-install or replace it with new one.
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