Outline; Outline Of Troubleshooting; Troubleshooting By The Phenomenon; Incorrect Value Check Value - Canon iPF700 Series Service Manual

6.1 Troubleshooting

6.1.1 Outline

6.1.1.1 Outline of Troubleshooting

1. Overview
Targets of troubleshooting are classified into the troubles displayed on the LCD (i.e., warnings, errors, and service calls) and the troubles not displayed on the LCD.
Warnings and errors are displayed on the printer's LCD along with a code comprising alphanumeric characters.
2. Precautions for Troubleshooting
1) Check the environmental conditions and the media used.
2) Before starting troubleshooting, check that the connectors and cables are connected properly.
3) If you repair the printer with its external panel detached without disconnecting the AC cord from the outlet, take great care to prevent electric shock and short-
circuiting of PC boards.
4) Countermeasures to take after completion of troubleshooting are described starting with the most probable component that can cause the trouble determined by
troubleshooting. If there are two or more equally probable components, countermeasures are described starting with the component that requires the easiest
repair. After performing each countermeasure step, carry out test printing to check whether the problem has been solved. If not solved, try the next
countermeasure step.
5) After completion of troubleshooting, check that all the necessary connectors and screws have been installed securely.
6) After completion of replacement or repair of a component, be sure to carry out test printing to make sure that the trouble has been solved.

6.1.2 Troubleshooting by the Phenomenon

6.1.2.1 Incorrect Value Check Value

<Cause>
The value entered in "IP Address", "Subnet Mask", or "Default G/W" after selecting [Interface Setting]>[TCP/IP]>[IP Setting] is invalid.
<Probable fault location>
Operation method or Main Controller PCB
<Countermeasure>
1) Operation check
Correct the value in "IP Address", "Subnet Mask", or "Default G/W" and check whether the message disappears.
2) Replace the Main Controller PCB.

6.1.2.2 Load roll.

<Cause>
In the roll media mode, the media sensor detected absence of media.
<Probable fault location>
Operation method, media sensor, or main controller PCB
<Countermeasure>
1) Operation check
Check the roll media to check whether the message changes.
2) Visual check
Remove foreign substances from the feed roller if any.
3) Media sensor
Select [SERVICE MODE]>[I/O DISPLAY] to check for normal operation. If the operation is abnormal, replace the media sensor.
4) Replace the main controller PCB.

6.1.2.3 Load sheets. /Remove sheets.

<Cause>
In the cut media mode, the media sensor detected absence of cut media.
When the cut media mode is switched to the roll media mode, the media sensor detected presence of paper.
<Probable fault location>
Operation method, media sensor, or main controller PCB
<Countermeasure>
1) Operation check
Check whether the message changes when cut media is loaded or unloaded.
2) Visual check
Remove foreign substances from the media sensor if any.
3) Media sensor
Select [SERVICE MODE]>[I/O DISPLAY] to check the operation. If the operation is abnormal, replacement is required.
4) Replace the main controller PCB.

6.1.2.4 Open Ink Tank Cover

<Cause>
When the power is turned on, the machine detected absence of the tank.
<Probable fault location>
Operation method, ink tank, ink tank unit, or main controller PCB
<Countermeasure>
1) Operation check
Check whether the message changes when ink tanks of all colors are installed.
2) Visual check
Remove foreign substances from the contacts if any.
3) Replace the ink tank.
4) Replace the ink tank unit.
5) Replace the main controller PCB.
Chapter 6
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