45530603TH Rev.2
4-75
Oki Data CONFIDENTIAL
4. TROUBLESHOOTING PROCEDURE
4.5.2.(16) Option tray unit cannot be recognized.
(16-1) Option tray unit cannot be recognized.
Check item
Check work
Actions to be taken
at NG
(16-1-1) Option tray PCB
Option tray PCB
Fuse
Measure the resistance of Option tray PCB
F502 fuse.
Check the PU/
CU PCB or
Option tray PCB
connection
cable. If the
cable is normal,
replace the
Option tray
PCB.
PU/CU PCB Fuse
Measure the resistance of PU/CU PCB F1
fuse.
Check the
Option tray PCB
connection
cable. If the
cable is normal,
replace the PU/
CU PCB.
(16-1-2) Check the system connection
Check the system
connection from the
PU/CU PCB to the
option tray PCB.
Check that the cable between the PU/CU
PCB TRY connector to the option tray PCB is
normally connected.
Correct the
connections.
Square connector
connecting the
option tray unit to
the printer.
Check if any foreign material exists in the
connecting portion of the square connector.
Remove
the foreign
material.
Square connector
connecting the
option tray unit to
the printer.
Is the terminals of the square connector
damaged?
Replace the
connector.
4.5.2.(17) LED head cannot be recognized. (Service Calls 134-01 to 134-05)
(17-1) Errors 131 to 134 (LED HEAD Missing)
Check item
Check work
Actions to be taken
at NG
(17-1-1) Electric parts
Fuses of the control
PCB
Check the following fuses according to the
indicated service call codes.
01 to 04: Printer control PCB (F25)
05: Spot color PCB (F2)
Replace the
faulty parts.
LED head wiring
condition
Check the connection of FCC to the LED
head and the PCB.
Reconnect the
FFC.
LED head unit
Check the LED head unit when the above
work does not solve the problem.
Replace the
LED head.