Fujitronic Programmable Operation Display UG520H-x - Manual (Page 235)

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5. Remove the two ribbon cables.
Slide the lock with the ribbon cable holding down with your fingers.
* The connector is not removable.
Ribbon cable connector
Slide the lock to release it.
Lock
Ribbon cable
Ribbon cable connector
Lock Ribbon cable
6. Remove cord band and remove the LCD module connector by pulling it up.
Hold the connector and pull it out. Do not twist or yank on the cable
then.
Screws
Screws
Front external case
Inside case
LCD module connector
Cord band
7. Remove the 8 screws fixing the inside case.
8. Remove the inside case from the front external case.
Take care not leave scratches, fingerprints, or dirt on the display panel.
9. Place the inside case with the display panel side up.
7 How to Replace the Backlight Unit