7 Troubleshooting This chapter provides information about the following topics. ● Basic troubleshooting ● Control-panel messages ● Solving image-quality problems ● Solving scanning (copying) image-quality problems ● Repetitive image defect ruler ● Solving paper-feed problems ● Functional checks ● Firmware update using a flash executable file ● Troubleshooting tools ● Service-mode functions ● Main wiring ● Component locations ENWW 109