- Check to see that that the sensors, clutches, motors, and solenoids are operating normally and all connectors are connected securely. (Be sure to check the power

supply and signal routes by referring to the general circuit diagram.)

- Check to see that the leakage breaker and circuit breaker are operating normally.

- Check to see that there is no biting of wires and loosening of screws.

- Check to see that all external panels and covers have been correctly fitted.

- Check to see that the main power switch and the control panel power switch are turned on.

- Check to see that the power and signal cables are correctly routed.

- Check to see that the operation of the cover switch is normal.

- Check to see that none of the fuses on the PCBs have an open circuit.

- Check to see that the user has a correct understanding of how to use the machine and is using it correctly.

14.1.7 Others

iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N / / iR4570N / iR2230 / / / iR3530 /

If a machine is brought from a cold to warm room, its inside can start to develop condensation, leading to various problems.

a. condensation on the BD sensor is likely to cause problems associated with E100

b. condensation on the dust-proof glass is likely to cause poor image density in sub scanning direction

c. condensation on the contact sensor of the reader unit or on the copyboard glass can cause light images

d. condensation on the pickup or feed guide can cause paper feed problems

If the problem given in d. above has occurred, dry wipe the units in the feed system. Do not open the package containing a toner cartridge, developing unit, or drum

unit right after it has been brought in from a cold to warm place to avoid condensation. Be sure to leave it alone for a while (1 to 2 hr), opening it after it has become

fully used to the temperature of the site.

14.2 Troubleshooting

14.2.1 Image Faults

14.2.1.1 Blank Image

14.2.1.1.1 Blank image/Toner is not supplied: Because pin of toner sensor connector for developing assembly is bent

iR2270 / iR2870 / iR3570 / iR4570 / / / / / iR2230 / / / iR3530 / / / / /

[ Inspected by Canon Inc. ]

Description

As a result of inspection, it was found that the symptom occurred because a pin of the toner sensor connector for the developing assembly was bent, thereby

causing the machine to fail to detect the absent of toner.

Field Remedy

When the symptom occurs, check the toner sensor connector J3405 for bad connection. If the connector has bad connection, modify it.

14.2.1.2 Foggy Image

14.2.1.2.1 When copying book original, fogging/shadow occurs on output image

iR2270 / iR2870 / iR3570 / iR4570 / / / / / iR2230 / / / iR3530 / / / / /

[ Inspected by Canon Inc. ]

Description

As a result of inspection, it was found that the symptom occurred with a ripply original. However, the symptom was solved by executing the service mode

item "CCD-ADJ" using paper with low whiteness such as recycled paper. When the symptom occurs, try the following procedure.

14-2

0007-9389

0010-4138

0010-4135

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