Have you tried the sim 25-1 to see what the toner value is? Sharp pretty much just says check the connectors and the toner sensor then replace the toner. If you are using refilled toners that could be the issue. These are the troubleshootings steps for F2-02 in SM. Techsupport Printer
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Have you tried the sim 25-1 to see what the toner value is? Sharp pretty much just says check the connectors and the toner sensor then replace the toner. If you are using refilled toners that could be the issue. These are the troubleshootings steps for F2-02 in SM. Techsupport Printer