6  Installation of Options
98
CL4NX/CL6NX Service Manual
6.1
Installation of the Optional RTC (Real Time 
Clock) Kit
CAUTION
Before the installation, be sure to power off the printer and disconnect the power cord.
Required tool:
• Phillips screwdriver (JIS #2 or equivalent)
1 Remove the screw ., slide and lift to 
remove the left housing cover 
3.
Note
When removing the left housing cover, make sure 
that the cover does not touch the PCB, causing the 
components of the PCB to be deformed.
2 Attach the EXT PCB $and tighten four 
screws 
/.
Slide 
& Lift
2
1