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

4.1 Disassembly Procedures:

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)

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.

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)

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)

Necessary repair and test equipment:

1. Philips-head screwdriver

4. Disassembly and Assembly Procedures

S11

S12

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

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)

4567

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

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)

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.

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.

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)

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.

Take a mylar to insert the hooks of the bracket to

cover the power board as the following picture shown.

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)

4. Disassembly and Assembly Procedures

S11

S10

S12

S13

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.

Take 1pcs front bezel, then lift up the panel with

bracket and assemble the front bezel with the panel

module.

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

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

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

142

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

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