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Dell U2421HE Service Manual page 8

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Panel preparation: Take out 1pcs panel module from
the carton, remove the protective film by tearing off
S6
the tapes, then Examine the panel surface
according to inspection criteria. Turn over the panel
to place screen faced down for later assembling.
Move the bracket chassis module close to the panel
module, then connect the LVDS cable to the
S7
connector of the panel module, then turn over the
bracket chassis and put it on the back of the bracket
chassis module.
Adjust the bracket chassis module, and then u
Philips-head screwdriver to tighten 4pcs screws for
S8
locking the bracket chassis module with the panel
(No.1~4 Screw size= M3x0.5x3, Torque=5~6kgfxcm)
2
1
4. Disassembly and Assembly Procedures
se a
.
3
4
Connect the panel power cables to the two
S9
connectors of the panel module, then fix the cables
with 2pcs acetate tape as the following picture.
Take 1pcs function key board, 1pcs lens and 1pcs
middle bezel, assemble the lens with the front bezel,
and then locate the function board into the specific
position of the front bezel. Put the unit into a fixture,
S10
use
a Philips-head screwdriver to tighten 3pcs
screws for locking the function key board with the
front bezel.
Stick 1pcs mylar tape to cover the
function key board.
(No.1~3 Screw size= M2x2.4, Torque=1±0.2kgfxcm)
3
2
1

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