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Confidential
9-35
I-7
Black and blurred horizontal stripes
User Check
(1) The drum unit may be damaged. Install a new drum unit.
(2) Check the paper used meets the recommended paper specifications.
(3) Clean the printer interior and the corona wire in the drum unit.
Possible cause
Step
Check
Result
Remedy
Ground
contacts
Scratch on the
drum
1
Are the horizontal stripes
at 75.3mm (exposure
drum) intervals?
Yes
The exposure drum was
scratched. Replace the
drum unit.
Toner stuck
on the
developer
roller
2
Are the horizontal stripes
at 37mm (developer roller)
intervals?
Yes
After printing several
pages, the problem will
disappear.
If not, replace the toner
cartridge.
Scratch on the
heat roller
3
Are the horizontal stripes
at 79mm (heat roller)
intervals?
Yes
Replace the heat roller.
Corona
contact failure
4
Are the charge electrodes
between the printer body
and the drum unit dirty?
Yes
Clean both electrodes.
High-voltage
power supply
PCB failure
5
Is the problem solved after
replacing the high-voltage
power supply PCB?
Yes
Replace the high-
voltage power supply
PCB.
I-8
Black vertical streaks (in a gray background)
Possible cause
Step
Check
Result
Remedy
Ground
contacts
Translucent
stain on the
scanner
window
1
Is there any dirt on the
scanner window?
Yes 1) Clean the scanner
window.
2) If it is not effective,
replace the laser
unit.
Corona failure
2
Is the corona wire dirty?
Yes Clean the corona wire
with the wire cleaner.
Summary of Contents for Intelli FAX-2820
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS FAX 2820 2825 2910 2920 MFC 7220 7225N ...
Page 13: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 20: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 44: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 63: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 66: ...Confidential 4 2 Cover page sample End page sample ...
Page 67: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 136: ...Confidential 5 67 5 1 41 Harness Routing ...
Page 137: ...Confidential 5 68 ...
Page 138: ...Confidential 5 69 ...
Page 139: ...Confidential 5 70 ...
Page 140: ...Confidential 5 71 ...
Page 141: ...Confidential 5 72 ...
Page 142: ...Confidential 5 73 ...
Page 145: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 151: ...Confidential CHAPTER 7 CLEANING ...
Page 153: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 158: ...8 4 Confidential MFC 7220 7225N Menu Set key and keys Start key Stop Exit key ...
Page 161: ...8 7 Confidential Scanning Compensation Data List a b c d e f g h i ...
Page 172: ...8 18 Confidential Cover page sample End page sample ...
Page 180: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 317: ......
Page 318: ......
Page 321: ...February 05 SM FAX037 13 8X5A01 Printed in Japan ...