Offline: Open Upper Cover; Printer Setup: Open Upper Cover; Printer Setup: Open Right Cover; Printer Does Not Turn On - Canon WS8400 Service Manual

Chapter 6

6.1.2.4 Offline: Open Upper Cover

<Cause>
In Cut Sheet mode, unloaded paper was detected while the upper cover was closed.
<Probable problem locations>
Operating procedure, upper cover, upper cover sensor (L/R), upper cover lock unit, engine controller and system controller
<Remedy>
1. Operation check
Check that the message changes when the upper cover is opened.
2. Visual check
Replace if the upper cover sensor (L/R) is damaged, deformed or otherwise does not function normally.
Remove any foreign objects adhering to the upper cover lock unit.
3. Upper cover upper cover sensor (L/R)
Check operation using SERVICE MODE>I/O DISPLAY, and replace if anything does not function normally.
4. Cable connection check
Replace the cable connecting the upper cover sensor (L/R) and engine controller if the connection is not functioning normally.
5. Replace the engine controller.
6. Replace the system controller.

6.1.2.5 Printer Setup: Open Upper Cover

<Cause>
This is displayed when no printhead is detected when the power is turned on.
<Probable problem locations>
Operating procedure, printhead, carriage relay PCB, carriage unit, engine controller, system controller
<Remedy>
1. Operation check
Check that the message changes when the printhead is installed.
2. Visual check
Remove any foreign objects adhering to the printhead contact face.
3. Replace the printhead.
4. Cable connection check
Replace the cable between the head relay PCB and carriage relay PCB if the connection is not functioning normally.
5. Replace the carriage relay PCB.
6. Replace the carriage unit.
7. Cable connection check
Replace the cable between the carriage relay PCB and engine controller if the connection is not functioning normally.
8. Replace the engine controller.
9. Replace the system controller.

6.1.2.6 Printer Setup: Open Right Cover

<Cause>
This is displayed when no ink tank is detected when the power is turned on.
<Probable problem locations>
Operating procedure, ink tank, ink tank unit, engine controller, system controller
<Remedy>
1. Operation check
Check that the message changes when the ink tanks for all colors are installed.
2. Visual check
Remove any foreign objects adhering to the contact face.
3. Cable connection check
Replace the cable between the ink tank unit and engine controller if the connection is not functioning normally.
4. Replace the ink tank.
5. Replace the ink tank unit.
6. Replace the engine controller.
7. Replace the system controller.

6.1.2.7 Printer does not turn on

<Condition example>
Nothing is shown on the display when the Power button is pressed.
<Cause>
Broken connection in connector, faulty inlet unit, faulty power supply, faulty operation panel, faulty engine controller, faulty system controller
<Remedy>
1. Power cord
Reconnect the power cord.
2. Connector check
Reconnect the connectors for the operation panel (J1), system controller (J6, J7), engine controller (J101, J109, J110), and power supply (J1001, J1002,
J1003).
3. Fuse check
Replace if the fuse for the power supply is blown.
4. Cable connection check
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0009-7064
0009-7065
0009-7067
0009-7068