Oki IP-6620 Maintenance Manual page 307

5.5.57 System Error 350X: Head Thermistor Error
<Description>
The print head thermistor's value is:
- -15°C or less; or
- 95°C or more
The following shows the correspondence between number X and the print head numbers.
X
1
2
3
4
5
6
7
<Faulty part>
(1) HEAD CABLE, MW (print head cable)
(2) PCB-ASSY-HCB1M
(3) INKJET HEAD,MW (print head)
(4) Carriage cable (FFC): CARRIAGE FFC, MW
(5) Robot cable: ROBOT CABLE, 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.
Note:
For this error, be sure to perform the actions 1 to 5.
No
1 The unit connected to the
PCB-ASSY-HCB1M
5-148
Chapter 5 Troubleshooting (Engine Section and USB Controller Section)
Print Head No.
Print head 1
Print head 2
Print head 3
Print head 4
Print head 5
Print head 6
Print head 7
Items to be Checked
OKI Data Infotech Corporation CONFIDENTIAL
(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.
Action