• “Tray (x) sensor service check” on page 132
• “550 and 650 input option service check” on page 134
• “Scan/fax/copy symptoms” on page 135
• “Black or blank page copy service check” on page 136
• “CCD service check” on page 137
• “Flatbed motor service check” on page 137
• “Flatbed home position service check” on page 137
• “ADF cover open service check” on page 138
• “ADF streak service check” on page 139
• “ADF paper jam service check” on page 139
• “ADF feed errors service check” on page 141
• “ADF duplex service check” on page 142
• “Modem/fax card service check” on page 143
• “Fax reception service check” on page 144
• “Fax transmission service check” on page 146
• “Fax error log codes” on page 148
• “Escalating a fax issue to second‑level support” on page 152
Base printer symptoms
Symptom Action
Dead printer service check “Dead printer service check” on
page 115
Front door sensor or switches service check “Front door sensor or switches service
check” on page 117
Operator panel (display is dim and unchanging) service check “Operator panel (display is dim and
unchanging) service check” on
page 121
Operator panel (displays all diamonds, no beeps, or five beeps) service check “Operator panel (displays all
diamonds, no beeps, or five beeps)
service check” on page 124
Operator panel (display blank) service check “Operator panel (display blank) service
check” on page 126
Operator panel (one or more operator buttons fail) service check “Operator panel (one or more operator
panel buttons fail) service check” on
page 128
Operator panel USB cable service check “Operator panel (one or more operator
panel buttons fail) service check” on
page 128
Trays 2 and 3 (optional) service check “Trays 2 and 3 (optional) service check”
on page 130
USB service check “USB service check” on page 130
7527
Diagnostic information
112
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General
Weight and Dimensions
