Oki IP-6620 Maintenance Manual page 300

5.5.53 System Error 3140: Head Cooling Fan Error
<Description>
The print head cooling fan has been rotating for a specified period, but the print head
temperature did not decrease.
<Faulty part>
(1) COOLING FAN, MW (print head cooling fan)
(2) PCB-ASSY-HCB1M
(3) Carriage cable (FFC)
(4) Robot cable
(5) CABLE(CarriageFan)-ASSY(MW)
<Action>
Check the Items to be Checked on the table below, and perform the actions starting from the top
until the problem is solved.
No
1 Ambient temperature
2 COOLING FAN, MW (print head
cooling fan)
3 The width of the V-shaped folded
part on the
PCB-ASSY-HCB1M-side FFC
FFC's external damage
4
5 FFC's connector connection
Robot cable's connector
6
connection
7 PCB-ASSY-HCB1M
8 FFC
9 Robot cable
10 CABLE(CarriageFan)-ASSY(MW)
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
Items to be Checked
OKI Data Infotech Corporation CONFIDENTIAL
Check that the ambient temperature is within the operating
temperature range.
Enter the ACTUATORS menu in the maintenance mode, operate
the print head cooling fan, and check that the fans operate.
If any fan does not operate, check that the harness condition
of the defective fan is proper as follows.
- The connectors are connected securely.
- The cable is not disconnected.
- The harness is not pinched by other parts.
- The cable jacket is not damaged.
If no problem is found with the harness, replace the fans.
Check that the width of the V-shaped folded part on the FFC
is proper. If not, adjust it. For the adjustment procedure, see
6.8.4 PCB-ASSY-HCB1M.
Check the following to ensure that the FFC is not damaged.
- FFC's terminal is detached from its base.
- FFC's edges have not been abraded by friction.
If the FFC is damaged, replace it.
Reconnect the FFC on both the PCB-ASSY-HCB1M side and
the PCB-ASSY-IPB5-100 side.
If the cable terminals are smeared, softly wipe them with a
soft cloth or lint-free paper dampened with ethanol before
connecting them.
Reconnect the robot cable on both the PCB-ASSY-HCB1M
side and PCB-ASSY-ACT3 side.
Before connecting, check that the connector terminals and
cable connection part are not disconnected. If a connection
failure is found, replace the robot cable.
Replace the PCB-ASSY-HCB1M.
Replace all four FFCs.
Replace the robot cable.
Replace the CABLE(CarriageFan)-ASSY(MW).
Action
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