Lead Edge Voids Of Paper Due To Retransferring Ir105; Black Lines: When Using Adf; E220-0001: The Inverter Pcb Is Not Properly Grounded Error Code; E712-0001/E712-0002 Error Code - Canon ImageRunner iR8500 Series Service Manual

15.2 Troubleshooting

15.2.1 Countermeasures

15.2.1.1 Lead edge voids of paper due to retransferring iR105

iR105
Symptom
Lead edge voids of paper due to retransferring (iR105)
Description
Retransferring causes white spots at the leading edge of paper when non-recommended paper is used.
Cause
Separation charging current is determined based on Canon recommended paper. Since there are differences in the thickness and the surface
resistance between Canon recommended and non-recommended paper, the separation charging current is not suitable for non-recommended paper
and the retransferring problem will occur.
As a result of verification into the actual case reported from the field, the separation charging current tends to be higher against the paper in use.
Field Remedy
In order to check whether the retransferring can be improved, output 5 sheets or more in intermittent mode after each setting change.
1. Load paper exhibiting the retransferring into a cassette and set it at thin recycled paper mode.
- In service mode [COPIER>Option>BODY>TR-SP-C1 through TR-SP-DK], enter '1'.
Check whether the retransferring can be improved at each setting. If any improvements can be seen, complete the setting change at that point. Not
improved -> Go on to Step 2.
2. Decrease the separation charging current.
- In service mode [COPIER>Option>BODY>TR-SP-C1 through TR-SP-DK], enter '0'.
- In service mode [COPIER>Adjust>HV-TR>TR-N1/TR-N2], change the value from -588mA (ref) to -450mA.
- In service mode [COPIER>Adjust>HV-SP>SP-N1/SP-N2], enter '350mA' and then '300mA'.
Check whether the retransferring can be improved at each setting. If any improvements can be seen, complete the setting change at that point. Not
improved -> Go on to Step 3.
3. Adjust the height of separate charging wire.
- Lower the height of secondary separate charging wire (left) by 0.7mm.
- Lower the height of secondary separate charging wire (left) by 0.7mm furthermore.
- Lower the height of primary separate charging wire (right) by 0.7mm.
- Lower the height of secondary separate charging wire (left) by 0.7mm furthermore.
Check whether the retransferring can be improved at each setting. If any improvements can be seen, complete the setting change at that point. Not
improved -> Go on to Step 4.
4. Lower VD.
- In service mode [OPIER>Adjust>V-CONT>VD-OFST], enter '-50'.
- In service mode [OPIER>Option>BODY>COTDPC-D], enter '1', '2' and '3' in this order.
Check whether the retransferring can be improved at each setting. If any improvements can be seen, complete the setting change at that point. Not
improved -> Go on to Step 5.
5. Select 'Tracing paper'.
- Reset all the settings in Step 2 through 4 to default.
- In service mode [COPIER>Option>BODY>TR-SP-C1 through TR-SP-DK], enter '2'.

15.2.1.2 Black lines: when using ADF

iR7200
Symptom
Black lines: when using ADF
Field Remedy
In order to activate the following three functions with iR7200, upgrade the system software to Ver.50.49, RCON to Ver.7.02 and ADF CONT to Ver.8.01
or later.
- Detecting dust in stream reading mode
- Shifting document reading position
- Displaying the result of dust detection
In addition to the upgrade, select '1' in service mode [COPIER>Option>USER>SPECK-DP (enable/disable the indication of the result of dust detection)].

15.2.1.3 E220-0001: the inverter PCB is not properly grounded Error Code

iR7200
Symptom
E220-0001: the inverter PCB is not properly grounded Error Code
Cause
Inverter PCB is faulty.
Field Remedy
Check the inverter PCB J5101 for 24V input.
If there is input, the inverter PCB is likely to be faulty. In such a case, replace it with a new one (FH3-7208).

15.2.1.4 E712-0001/E712-0002 Error Code

iR7200
Symptom

E712-0001/E712-0002 Error Code

Description
This error code is related to the reader area of iR7200. Some of the error codes can be displayed although they are not explained in the service manual
Chapter 15
0001-6609
0001-8241
0001-9930
0001-9199
15-3