Dell D2721H User manual

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1

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27"LCDColorMonitor Dell D2721H

Service

Service

Service

SAFETYNOTICE

HorizontalFrequency

30kHzto83kHz

CAUTION: USEASEPARATEISOLATIONTRANSFOMERFORTHIS UNITWHENSERVICING

ANYPERSONATTEMPTINGTOSERVICETHISCHASSISMUSTFAMILIARIZEHIMSELFWITHTHECHASSSAND

BEAWAREOFTHENECESSARYSAFETYPRECAUTIONSTOBEUSEDWHENSERVICINGELECTRONICEQUIPME

NTCONTAINING HIGH VOLTAGES.

6

DELL D2721H

1

Mechanical Instruction

1 Disassembly Procedures:

Turn off power

Unplug external cables from product

Use a Philips‐ head screwdriver to

remove 6 screws for unlocking

mechanisms.

(No.1~4 screw size=M4x10; Torque=7.5~8.5kgfxcm

No.5~6 screw size=M4x5; Torque=5~6kgfxcm.)

Use your finger to push the button , then

pull out the stand .

Use a Philips‐ head screwdriver to remove

1screw for unlockingmechanisms.

(Screw size=M3x6; Torque=4.5~6.5 kgfxcm)

Wedge your fingers(or plastic picks )

between the rear cover and the middle bezel

on the corners of the bottom side of the

monitor to release the rear cover, then pull

up carefully the rear cover in order of arrow

preference for unlocking mechanisms of rear

cover.

Put it on a protective cushion and remove

the rear cover.

Use a Philips‐head screwdriver to remove

17 screws for unlocking mechanisms.

(No.1~15 screw size=M3x4; Torque=4.5~6.5kgfxcm

No.16~17 screw size=M3x3; Torque=4.5~6.5kgfxcm.)

S1

S2

S3

S4

S5

S6

S7

S8

7

S12

DELL D2721H

2

Tear off 2 pieces tapes and 3 pieces aluminum

foil (pic.7.1)

Disconnect the backlight cable and LVDS cable

from the connectors of panel(pic.7.2).

Take off the key board from the bezel, then

disconnect the cable from the key board

(pic.7.3).

Pic.7.1

Pic.7.2

Pic.7.3

Lift up the bracket chassis module and put it

on a protector cushion. Please pay attention

Tear off the tape (Pic.10.1).

Use a Philips‐ head/hexagon screwdriver to

remove 7 screws and 2 hexagon screw for

unlocking the main board and power board

(Pic.10.2 and 3).

Please make sure screw driver not touch with

components on board）

(No.1~5+7 screw size=M3x6; Torque=4.5~6.5 kgfxcm

No.8~9 screw size=H4.7x5 (Hexagon screw); Torque=

4~5kgfxcm

Pic.10.1

Pic.10.2

Pic.10.3

Take off the PCB from the shielding cover

to ESD protection (wear ESD ring and so on). and put in on a protector cushion.

Then disconnect cables from the main board

and the power board.

S9

S10

S11

8

DELL D2721H

3

Lift up the top side of the bezel, then pull

down to take off the bezel.

S13