Dell S3422DW User manual

34" LCD Monitor DellS3422DW
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Service
Service
Service
Simplified

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Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all DELL Company Equipment. The service
procedures recommended by DELL and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The special
tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods
may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. DELL could not possibly know, evaluate and advise the service trade of all conceivable ways in which
service might be done or of the possible hazardous consequences of each way. Consequently, DELL has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by DELL must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, DELL Company will be referred to as DELL.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock, fire,
or other hazards.
Under no circumstances should the original design be modified or altered without written permission from DELL. DELL
assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the
panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth
may damage the panel.)

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1. Exploded view diagram with list of items

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No. Description Q’ty
1 Middle frame 1
3 Panel 1
5 CONVERTER BOARD 1
6 INSULATING SHEET 1
7 MAIN_FRAME 1
10 Rear cover 1
12 LOGO BACK 1
13 STAND HINGE 1
14 LOGO FRONT 1
15 DECO BEZEL 1
16 SPONGE 1
17 DECO PLATE 1 No. Part No. Description Q’ty
19 KEY BOARD 1 2 0M1G3030 4120 SCREW(MIDDLEFRAME/Panel) 18
20 KEY_POWER 1 4 0Q1G2030 6120 SCREW M3 6(speakers /Panel) 4
21 KEY FUNCTION 2 8 0M1G3030 4120 SCREW M3 4(POWER BOARD/MAINFRAME) 4
26 INSULATING SHEET 1 11 0M1G2940 10125 SCREW M4 10(MAINFRAME/REAR COVER) 4
27 MAIN BOARD 1 18 Q01G6019 1 SCREW 2 2.5 (KEY BOARD/MIDDLE FRAME) 3
28 ADAPTER BOARD 1 22 Q01G6019 1 SCREW 2 2.5 (MAIN FRAME/DECO BEZEL) 7
29 SPEAKER 1 23 0D1G1030 6120 SCREW M3 6(MAIN FRAME/MAIN BOARD) 5
32 LATCH 1 24 QM1G38400601200ARA SCREW M4 (MAIN FRAME/POWER BOARD) 1
33 STAND BUTTON 1 25 0D1G1030 6120 SCREW D3 6 (MAIN FRAME/POWER BOARD) 3
34 SPRING 2 30 0Q1G2030 6120 SCREW M3 6(speakers /MIDDLE FRAME) 4
35 STAND BASE 1 31 0Q1G2030 6120 SCREW M3 6(LATCH /REAR COVER) 3

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2. Wiring connectivity diagram
Connector Ass’y PN:
395GH20007DM120HPF
Connector Ass’y PN:
395G179M51N57100HF
Connector Ass’y PN:
395GH20012DM116HPF
This Connector welding in
SPEAKER
This Connector welding in
Key Board

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3.Mechanical Instruction
Tools Required
Listthetypeandsizeofthetoolsthatwouldtypicallycanbeusedtodisassembletheproducttoapoint
wherecomponentsandmaterialsrequiringselectivetreatmentcanberemoved.
ToolDescription:
- Phillip-head Screwdriver

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3.1 Disassembly Procedures:
Step Figure Remark
S1.Before
disassemble
Turnoffpower,
Unplugexternalcables
fromproduct
S2.Remove the
STAND-BASE
ASS’Y
Put the MNT the curve
cushion.
Push the button to
remove the stand-base
assy.
S3.Remove the
REAR COVER
Use a Philips-head
screwdriver to remove 4
screws for unlocking
mechanisms.
(No.1~4 screw
size=M4x10; Torque:
12±2kgf.cm)
1
2 3
4

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Use Penknife to
separate the bezel and
rear cove follow the
arrows in sequence,
then you can take out
rear cover.
S4.Tear off the
tapes and
disconnect the
connectors
Tear off 4 pieces of
aluminum foil and 4
pieces of tapes.
Disconnect the cables
from the connectors.
S5.Remove the
speakers
Use a Philips-head
screwdriver to remove 4
screws for unlocking the
speakers.
(No.1~4 Screw size=M3x6,
Torque: 4±1kgf.cm)
Disconnect all of the
cables

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S6. Remove the
main board and
power board
Use a Philips-head
screwdriver to remove 4
screws for unlocking the
main frame
(No.1~4 screw size=D3x4,
Torque: 3±0.5kgf.cm)
Disconnect the FFC
cable
Remove the mylar
Use a Philips-head
screwdriver to remove
13 screws for unlocking
the Main board, Power
board
(No.1~12 screw
size=D3x6,
Torque=6±1kgfxcm
No.13 screw size=M4x6,
Torque=6±1kgfxcm)
Disconnect the connectors

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S7. Remove the
Panel and middle
frame
Use a Philips-head
screwdriver to remove
18 screws for unlocking
the middle frame
(No.1~18 screw
size=M3x4,
Torque=3±0.5kgfxcm)
S7.Remove the
DECO_BEZEL
AND
Use a Philips-head
screwdriver to remove 7
screws to remove the
DECO_BEZEL.
(No.1~7 screw
size=M2x2.5,
Torque=1±0.2kgf.cm)
S8. Remove the
Key board
Use a Philips-head
screwdriver to remove 3
screws for unlocking the
key board
(No.1~3 screw
size=M2x2.5,
Torque=0.9±0.4kgf.cm)

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3.2 Assembly Procedures:
Step Figure Remark
S1.Assembly the
KEY BOARD and
BEZEL_DECO
Use a Philips-head
screwdriver to lock 3
screws for tighten the key
board
(No.1~3 screw
size=M2x2.5,
Torque=0.9±0.4kgf.cm)
Use a Philips-head
screwdriver to lock 7
screws to tighten the
DECO_BEZEL.
(No.1~7 screw
size=M2x2.5,
Torque=1±0.2kgf.cm)
S2.Assembly the
Panel and middle
frame
Use a Philips-head
screwdriver to lock 18
screws for tighten the
middle frame
(No.1~18 screw
size=M3x4,
Torque=3±0.5kgfxcm)
S3.Assembly the
main board and
power board
Connect the connectors

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Use a Philips-head
screwdriver to lock 13
screws for locking the
Main board, Power
board
(No.1~12 screw
size=D3x6,
Torque=6±1kgfxcm
No.13 screw size=M4x6,
Torque=6±1kgfxcm)
Paste the mylar
Connect the FFC cable
Use a Philips-head
screwdriver to remove 4
screws for unlocking the
main frame
(No.1~4 screw size=D3x4,
Torque: 3±0.5kgf.cm)
S4. Assembly the
speakers
main board and
power board
Use a Philips-head
screwdriver to remove 4
screws for unlocking the
speakers.
(No.1~4 Screw size=M3x6,
Torque: 4±1kgf.cm)
Disconnect all of the
cables

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S5. Connect the
connectors and
paste the tapes
Connect the connectors.
Paste 4 pieces of
aluminum foil and 4
pieces of tapes.
S6.Assembly the
REAR COVER
Use a Philips-head
screwdriver to Lock 4
screws for tighten
mechanisms.
(No.1~4 screw
size=M4x10; Torque:
12±2kgf.cm)
S7.Assembly the
Stand

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4.Trouble shooting instructions

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