Dell P3221D Istruzioni per l’uso
Product Announcement:
This product is certificated to meet RoHS
Directive and Lead-Free produced definition.
Using approved critical components only is
recommended when the situation to replace
defective parts. Vender assumes no liability
express or implied, arising out of any unauthorized
modification of design or replacing non-RoHS
parts. Service providers assume all liability.
Qualified Repairability:
Proper service and repair is important to the safe,
reliable operation of all series products. The
service providers recommended by vender should
be aware of notices listed in this service manual in
order to minimize the risk of personal injury when
perform service procedures. Furthermore, the
possible existed improper repairing method may
damage equipment or products. It is recommended
that service engineers should have repairing
knowledge, experience, as well as appropriate
product training per new model before performing
the service procedures.
NOTICE:
! To avoid electrical shocks, the products should be
connected to an authorized power cord, and turn
off the master power switch each time before
removing the AC power cord.
! To prevent the product away from water or
expose in extremely high humility environment.
! To ensure the continued reliability of this
product, use only original manufacturer’s
specified parts.
! To ensure following safety repairing behavior, put
the replaced part on the components side of
PWBA, not solder side.
! To ensure using a proper screwdriver, follow the
torque and force listed in assembly and
disassembly procedures to unscrew screws.
! Using Lead-Free solder to well mounted the
parts.
! The fusion point of Lead-Free solder requested in
the degree of 220°C.
1. Important Safety Notice
2. Exploded view diagram with list of items
3. Wiring Connectivity Diagram
AC In
Power BD
Panel
USB3.0
Down4
LED BD
FK key BD
HDMI 1.4 In DP 1.2 In Type C USB 2.0 Down 1 USB 2.0 Down 2
USB3.0
Down3
Interface BD
USB BD
4. Disassembly and Assembly Procedures
S2
4.1 Disassembly Procedures:
S1
S3
S5
S4
Remove the monitor stand base:
1. Place the monitor on a soft cloth or cushion.
2. Press and hold the stand-release button.
3. Lift the stand up and away from the monitor.
Use a Philips-head screwdriver to remove four
screws for unlocking mechanisms.
(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)
23
41
Wedge your fingers between rear cover and the
middle bezel on the corners of the top side of the
monitor to release the rear cover, then use one hand
to press the middle bezel, the other hand to pull up
carefully the rear cover in order of arrow preference
for unlocking mechanisms of rear cover.
3
2
1
2
Lift the rear cover up carefully. Disconnect the
joystick key cable from the connector of the interface
board, and then remove the rear cover and put it
aside for later diasassembling.
Use a Philips-head screwdriver to remove 2pcs
screw for unlocking the key board, then tear off the
tapes and release the key board.
(No.1~2 screw size=M2x2.4, Torque=0.8~1kgfxcm)
1
2
Use a Philips-head screwdriver to release 1 screws
for unlocking the USB board, then disconnect the
USB FFC cable away from the connector of the
interface board and remove the Usb board unit.
(No.1screw size=M3x6, Torque=4±0.5kgfxcm)
S6
1
Necessary repair and test equipment:
1. Philips-head screwdriver
4. Disassembly and Assembly Procedures
S9
S11
S12
S8
S13
S10
Tear off 1pcs conductive tape and 1pcs aluminum foil
as the picture below shown. Use a Philips-head
screwdriver to remove 4pcs screws for unlocking the
middle bezel with front bezel.
(No.1~4 screw size=M2x3.5, Torque=2.5±0.5kgfxcm)
142
3
S7
Disconnect the LED cable from the connector of the
interface board, then release the LED cable by
tearing off the tapes.
Use a Philips-head screwdriver to remove 14pcs
screws for unlocking the middle bezel with the panel
module, then tear off the aluminum.
(No.1~14 screw size=M3x5, Torque=5±0.5kgfxcm)
3
14
2
1
4567
8
9
10
11
12
13
Take away the middle bezel. U
tear off
the tape for releasing the LED cable.
se a Philips-head
screwdriver to remove 1pcs screw for unlocking the
LED board with the middle bezel, and then
(No.1~3 screw size=M2x2.4, Torque=0.8±0.2kgfxcm
2
Lift up the panel with the bracket chassis for releasing
the front bezel away from the panel. Disconnect the
panel lamp cables away from the connectors of the
interface board and the panel module.
Use a 4pcs
screws for unlocking the bracket with panel module.
Philips-head screwdriver to remove
(No.1~4 screw size=M3x4, Torque=5±0.5kgfxcm)
32
14
Move up the bracket, then disconnect the 2pcs LVDS
cables away from the connectors of the panel.
4. Disassembly and Assembly Procedures
S14 S17
Use a Philips-head screwdriver to remove
screws for interface board and power board.
7pcs
(No.1 screw size=M4x8, Torque=7±1kgfxcm;
No.2~7 screw size=M3x7.5, Torque=7±1kgfxcm)
Remove the power board board and interface
board from the
disconnect all of the cables.
bracket chassis module carefully,
and then
Remove the Mylar tape from the hooks of the
bracket.
2
5
3
1
76
4
Take away the bracket chassis module and then put
the bracket chassis module on a protective cushion.
S15
S16
4. Disassembly and Assembly Procedures
4.2 Assembly Procedures:
Turn over a power board and put the power board
into the bracket chassis.
Place a bracket chassis base on a protective
cushion, then stick 1pcs Silicon sheet on the position
as the picture below shown.
S2
S1
S4
Take a interface board, connect 2pcs LVDS cable to
the connectors of the interface board, then connect
the cable of the power board to the connector of the
interface board. Turn over the interface board and
locate it into the bracket, then locate all the cables
into the correct position of the bracket. Use a Philips-
head screwdriver to tighten 7pcs screws for locking
the circuit board, .
(No.1 screw size=M4x8, Torque=7±1kgfxcm;
No.2~7 screw size=M3x7.5, Torque=7±1kgfxcm)
S3
Panel preparation: Take a panel and then examine
the panel surface according to inspection criteria.
Tear off the protective film of the panel screen, and
then turn over the panel to place screen faced down.
S6
S5
Take a mylar to insert the hooks of the bracket to
cover the power board as the following picture shown.
2
5
3
1
76
4
Put down the bracket chassis module on the back of
panel module, then connect the two LVDS cables to
the connectors of the panel module.
Use a 4pcs
screws for locking the bracket with panel module.
Philips-head screwdriver to tighten
(No.1~4 screw size=M3x4, Torque=5±0.5kgfxcm)
S7
32
14
4. Disassembly and Assembly Procedures
S11
S10
S12
S13
3
14
2
1
Take 1pcs LED board and 1pcs middle bezel, then
put the middle bezel into a fixture jip to fix the middle
bezel. Locate the LED board to the correct positions
of the middle bezel. Philips-head screwdriver
to tighten
Stick a big piece of mylar tape to cover
the LED board.
Use a
1pcs screw for locking the LED board with
middle bezel.
(No.1 screw size=M2x2.4, Torque=0.8~1kgfxcm)
Take 1pcs panel lamp cable to connect the circuit
board with the connectors of the panel module.
S8
S9
Take 1pcs front bezel, then lift up the panel with
bracket and assemble the front bezel with the panel
module.
2
Move the middle bezel with the LED board close to
the panel unit, then assemble the middle bezel with
the front bezel and panel module.
Tear off the papers of the tapes on the back of the
LED cable, and then fix the LED cable on the panel
with 2pcs tapes, then connect the LED cable with
the connector of the board.
Paste 1pcs aluminum foil to fix the bracket, LED
cable and LVDS cable on the specific position as the
picture below shown. Use a Philips-head screwdriver
to tighten 14pcs screws for locking the middle bezel
with the panel module.
(No.1~14 screw size=M3x5, Torque=5±0.5kgfxcm)
4567
8
9
10
11
12
13
4. Disassembly and Assembly Procedures
S16
Take 1pcs USB board, 1pcs LVDS cable, 1pcs
conductive foam. Connect the LVDS cable to the
connector of the USB board, then paste 1pcs
conductive foam on the back of the USB board, and
then locate the USB board into the correct
position of the middle bezel. Use a Philips-head
screwdriver to tighten 1pcs screw for locking the
USB unit with the middle bezel, then connect the
cable with assemble unit.
(No.1 screw size=M3x6, Torque=4±0.5kgfxcm)
Move the assembled rear cover close to the
panel unit, then connect the key cable to the
connector of interface board. Put down the rear
cover and push the rear cover on the positions
marked as the picture below shown for
mechanisms engagement.
S18
Paste 1pcs aluminum foil to cover the two LVDS
connectors, then use a Philips-head screwdriver to
tighten 4pcs screws for locking the middle bezel with
front bezel.
(No.1~4 screw size=M2x3.5, Torque=2.5±0.5kgfxcm)
S14
Paste 1pcs conductive tape to cover the panel lamp
connectors as the picture below shown.
S15
1
Take 1pcs joystick key and 1pcs OSD board,
assemble the joystick key with the OSD board.
Locate the board to the correct position of the rear
cover, then use a Philips-head screwdriver to tighten
2pcs screws for locking the board with rear cover.
Tear off the tape papers on the back of the cable,
and then fix the key cable with tapes.
(No.1 screw size=M2x2.4, Torque=0.9±0.1kgfxcm)
S17
1
2
142
3
4. Disassembly and Assembly Procedures
Take a stand base close to the monitor. Fit the two
tabs on the upper part of the stand into the grooves,
and then lower the stand so that the monitor
mounting area snaps onto the stand.
Lift up the monitor to check the gap between the
front bezel and the panel, then provide power supply
and a video signal to the monitor
, then turn on the
monitor for functionality check.
S20
S21
Use a Philips-head screwdriver to tighten 4pcs
screws for locking the rear cover with the assembled
unit. Stick 2pcs labels on the specific positions of the
rear cover as the picture below shown.
(No.1~4 screw size=M4x11; Torque=11±1kgfxcm)
S19
23
41
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