Oki IP-6620 Maintenance Manual page 302

No Items to be Checked
5 The unit connected to the
PCB-ASSY-HCB1M
6 PCB-ASSY-HCB1M
7 INKJET HEAD,MW (print head)
8 PCB-ASSY-IPB5-100
9 FFC
10 Robot cable
OKI Data Infotech Corporation CONFIDENTIAL
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
(1) Check that the print head cable jacket is not damaged.
If damaged, replace it.
(2) If not damaged, reconnect it and restart the printer.
(3) If the problem persists, replace the cable of the faulty
print head with one of a print head operating normally.
If the error number changes, the faulty part is the print
head cable so replace it.
(4) Connect the print head cable to another print head. If
the error number changes for the newly connected
print head, check the other items to be checked below.
* The print head cable for the seventh print head is used
only for 7-color printers.
Replace the PCB-ASSY-HCB1M.
Replace the defective print head.
Replace the PCB-ASSY-IPB5-100.
Replace all four FFCs.
Replace the robot cable.
Action
5-143