Action Yes No
Step 6
Check the input option drawer and the following for any damage or
contamination:
• Top and bottom autoconnector
• Pass‑through sensors
• Feed rollers
• Input option pick assembly (if it can go down every time the paper
input tray is inserted)
Is the option drawer assembly free of damage or contamination?
Go to step 7.
• For 550 input
option, replace the
optional 550-sheet
drawer.
• For 650 input
option, replace the
optional 650-sheet
duo drawer.
Step 7
a Turn off the printer.
b Remove the printer from the input option trays.
c Remove the rear shield.
d Reseat the JOPT1 cable on the system board.
e Check the JOPT1 cable for any damage.
f Position the printer to partially hang on the side of a table, and check
the autoconnect/option tray cable for damage.
Is the tray 2 to controller board cable damaged?
• If the printer
autoconnector is
damaged, then
replace the tray 2 to
controller board
cable.
• If the option tray
autoconnector is
damaged, then go
to step 8.
Go to step 8.
Step 8
• For 550 input option, replace the optional 550-sheet drawer.
• For 650 input option, replace the optional 650-sheet duo drawer.
Does this fix the problem?
Problem resolved. Replace the controller
board. See “Controller
board removal” on
page 239.
Scan/fax/copy symptoms
Symptom Action
ADF won’t duplex (Duplex ADF only) See “ADF duplex service check” on page 142.
ADF skew See “ADF feed errors service check” on page 141.
Multiple pages feed into ADF
Documents wont feed into ADF
Scanner makes buzzing noise on startup or during a scan. See “Flatbed home position service check” on
page 137.
Document feeds, but jams in ADF. See “ADF paper jam service check” on page 139.
Black streaks on scans See “ADF streak service check” on page 139.
Blank page See “Black or blank page copy service check” on
page 136.
Black page
No dial tone See “Modem/fax card service check” on page 143.
7527
Diagnostic information
135
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General
Weight and Dimensions
