Symptom Action
Machine dials a number but fails to make a connection with another
fax machine.
The other fax machine may be turned off. Ask the fax
recipient to check their machine.
Incoming fax has blank spaces or poor quality.
• The sending fax machine may be faulty.
• The sending fax machine may have a dirty
document glass.
• A noisy phone line can cause errors.
• Check the MFP print quality by making a copy.
• The print cartridge may be empty.
Invalid fax partition, or fax partition too small. See “Format fax storage” on page 194.
Some words on an incoming fax are stretched. The sending fax machine had a temporary jam.
Faxes fail to transmit. See “Fax transmission service check” on page 146.
Fax reception fails. See “Fax reception service check” on page 144.
Rattling noise coming from the ADF unit. Inspect the ADF top cover and ADF separator pad for
proper installation. Remove the separator pad and
separator roll and reinstall them, if needed. See “ADF
separator pad removal” on page 234.
Also see “Top cover assembly removal” on
page 225.
Black or blank page copy service check
Actions Yes No
Step 1
Print a menu page, or a page from the host.
Is the page black?
See “Print quality solid
color page service
check” on page 36.
Go to step 2.
Step 2
Is the copy an ADF scan?
Go to step 3. Go to step 4.
Step 3
Run a flatbed copy.
Is it blank or black?
Go to step 5. Go to step 4.
Step 4
Did the sheet feed into the ADF?
Go to step 5.
Step 5
Is the CCD ribbon cable properly connected to JCCD1 on the controller
board?
Go to step 6. Properly connect the
ribbon cable to JCCD1.
Step 6
Check for +14VDC on Pin 33 and 34 on connector JCCD1. Pin 31 and 32
are +5VDC. Are the voltages present?
Replace the flatbed
unit. See “Flatbed
scanner assembly
removal” on page
252.
Replace the controller
board. See “Controller
board removal” on
page 239.
7527
Diagnostic information
136
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Weight and Dimensions
