Thermo Scientific SAM12, Manual

Page: 156 / 176

Maintenance and Trouble Shooting Issue: 1.0
11-8 SAM12 User Manual Thermo Fisher Scientific
are mandatory and necessary for continued EMC performance
and user safety.
WARNING: The Backlight Inverter generates dangerous high
voltages. Exercise caution when servicing, always allow the
HV to discharge before commencing work. Do not remove the
Inverter from its protective screening enclosure.
Refer to assembly drawing D92053/A for details.
Switch off the power .Before attempting to remove the Display
and Inverter, ensure the SAM12 is OFF. Remove the ten
“allen” screws from the rear of the display housing and gently
pull the front bezel assembly away from the main housing and
lay flat onto the top cover. Take care not to strain the three
cables attached. If necessary pull through more cable to ease
working on the assembly.
The controller and inverter cards are accessed by removing the
protection covers on the rear of the Display assembly. Take
care in removing the connecting cables.
Both the Touch Controller module and the Back-light Inverter
are propriety items and are not user serviceable. They should
be returned to Thermo Fisher Scientific’s service department
for repair or replacement.
Four screws attach the LCD shield to the front bezel. On
removal the LCD and shield can be lifted from the bezel and
touch screen, itself sitting in a recess of the plastic bezel. The
touch screen is not fixed to the bezel.
Another four screws hold the aluminium shield to the LCD, via
spacers.
Replacement of the LCD Display, Touch Screen, Touch
Controller and Back-light Inverter is the reverse of the removal
procedure. Should any item be thought faulty they should be
replaced with an identical unit (See
Recommended Spares List
(page 12-1) ).
It is necessary to take special care in handling the Touch Screen
and LCD, to keep all faces free of dirt and finger marks!
Disconnection and removal of these items are obvious. The
LED’s are propriety items and therefore are not user
serviceable. They should be replaced with identical parts as
detailed in
Recommended Spares List (page 12-1) .
LCD Display, Touch
Screen, Touch Controller &
Backlight Inverter -
Removal and Replacement
Replacement of the LCD
Display, Touch Screen, Touch
Controller and Backlight
Inverter
Front/Rear Panel LED’s -
Removal & Replacement