Acer XB323U User manual

Acer Monitor XB323U
LIFECYCLE EXTENSION
GUIDE

Contents
Table of Contents
Important Safety Notice.................................................................................3
1. Exploded Diagram......................................................................................4
2. Wiring connectivity diagram ....................................................................5
3. Mechanical Instruction..............................................................................6
4. Disassembly and Assembly SOP ............................................................7
5. Troubleshooting.......................................................................................13
6. FRU List .....................................................................................................15
Safety Notice
Any person attempting to service this chassis must familiarize with the chassis and be aware
of the necessary safety precautions to be used when serving electronic equipment containing
high voltage

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Important Safety Notice
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 being 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 connect 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 explosed 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 screw and 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.

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1. Exploded Diagram
1.1 Product Exploded Diagram
Item
ODM DESCRIPTION
Item
ODM DESCRIPTION
1
ASSY BZL
14
SPK
2
LCDM
15
TAPE
3
MID-FRAME
16
TAPE
4
SCRW
17
ASSY SHD
5
WIRE
18
TAPE
6
SCRW
19
MYLAR
7
MYLAR
20
SCRW
8
PCBA SPS BD
21
PCBA CTRL BD
9
PCBA LED DRIVER BD
22
ASSY USB SHD
10
PCBA IF BD
23
ASSY RC
11
WIRE
24
SCRW
12
PCBA USB BD
25
SCRW
13
SCRW
26
ASSY STAND

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2. Wiring connectivity diagram
There are four types of wiring diagrams for model XB323U. The wiring connectivity position will be
different according to the ACTUAL PCBA connector position. Please base on different SKU refer to
below diagram.
NOTE: INF BD= Interface Board, PWR BD=Power Board, CTRL BD= Control Board
1. SKU with USB
2. SKU without USB

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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:
- working table
- Screw-driver: Philips-head screwdriver, Hex-head screwdriver
- Knife
- glove
- cleaning cloth
- ESD protection

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4. Disassembly and Assembly SOP
XB323U
4.1 Disassembly Procedures
Preparation before disassemble
1.Clean the room for disassemble
2.Identify the area for monitor
3.Check the position that the monitors be placed and the quantity of the monitor ;prepare the area for material flow;
according to the actual condition plan the disassemble layout
4.Prepare the implement, equipment, materials as bellow:
1) working table
2) Screw-driver: Philips-head screwdriver, Hex-head screwdriver
3) knife
4) glove
5) cleaning cloth
6) ESD protection
After unplugging the power cord, the power board still have power energe. Please pay attention
when disassembling/assembling Power BD.
S1
Disassemble the
RC(Rear Case), stand
and base
Before Disassembling & Assembling, monitor need to be put on the sponge and
the Insulation glove must be wore during the process.
Unlock 4 RC screws and disassemble stand from RC as picture 1.
Unlock RC center and disassemble RC from MF as picture 2.
Tear off adhesive tape and CTRL FFC from RC as picture 3.
Unlock 2 CTRL BD screws and disassemble CTRL BD from RC as picture 4.
PICTURE 1 PICTURE 2
PICTURE 3 PICTURE 4
CTRL BD

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S2
Disassemble Lamp wire
Disassemble Mylar from SHD as picture 1.
Tear off 6 pieces of adhesive tapes from lamp wire as picture 2
Extract lamp wire from SHD as picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
S3
Disassemble SHD
Tear off 3 pieces of conductive tapes from SHD as picture 1
Disassemble SHD from MF as picture 2.
Tear off yellow tape and extract LVDS wire from panel as picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
S4
Disassemble the TRlM
and MF.
Unlock 2 TRIM screws and disassemble TRIM from MF as picture 1.
Unlock 9 MF screws, disassemble MF from panel and tear off 2 pieces of adhesive
tapes as picture 2.
Extract lamp wire from panel as picture 3.
PICTURE 1 PICTURE 2 PICTURE 3

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S5
Disassemble PCBAs from
SHD
Unlock 12 PCBA screws as picture 1.
Disassemble USB BD from SHD and extract USB wire from USB BD as picture 2.
Disassemble I/F BD from SHD, extract P/BD wire and SPK wire from I/F BD, then
extract LVDS wire and USB wire from I/F BD as picture 3.
Disassemble DRV BD and extract DRV wire and DRV BD wire from DRV BD as
picture 4.
Disassemble P/BD from SHD as picture 5.
Tear off 3 pieces of adhesive tapes as picture 6.
Disassemble SPK from SHD as picture 7.
PICTURE 1 PICTURE 2
PICTURE 3 PICTURE 4 PICTURE 5
PICTURE 6 PICTURE 7
NOTE: Circuit boards >10 cm² has been highlighted with the yellow rectangle as above image shows.
Please detach the Circuit boards and follow local regulations for disposal.
USB
BD
DRIVE BD
P/BD
I/F
BD
I/F
BD

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4.2 Assembly Procedures
Preparation before assemble:
1.Clean the room for work
2.Identify the area for material
3.Prepare the implement, equipment, materials as bellow：
1) working table
2) Screw-driver
3) Knife
4) glove
5) cleaning cloth
6) ESD protection
After unplugging the power cord, the power board still have power energe. Please pay attention when
disassembling/assembling Power BD.
S1
Assemble PCBAs into SHD
Before Disassembling & Assembling, monitor need to be put on the sponge
and the Insulation glove must be wore during the process.
Assemble SPK to SHD as picture 1.
Paste 3 pieces of adhesive tapes to fix SPK wire as picture 2.
Insert P/BD wire and DRV BD wire to P/BD as picture 3.
Assemble P/BD to SHD and assemble P/BD Mylar as picture 4.
Insert DRV wire and DRV BD wire to DRV BD, assemble DRV BD to SHD as picture 5
Insert LVDS wire, USB wire,P/BD wire and SPK wire to IF BD and assemble IF BD to
SHD as picture 6.
Insert USB wire to USB BD and assemble USB BD to SHD as picture 7.
Lock 12 PCBA screws as picture 8.
PICTURE 1 PICTURE 2 PICTURE 3
PICTURE 4 PICTURE 5 PICTURE 6
PICTURE 7 PICTURE 8
P/BD

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S2
Assemble Panel to MF
Insert lamp wire to panel as picture 1.
Paste 2 pieces of adhesive tapes to panel and assemble MF to panel and lock 9 MF
screws as picture 2.
PICTURE 1 PICTURE 2
S3
Assemble Trim and SHD
Assemble TRIM to MF and lock 2 TRIM screws as picture 1.
Insert LVDS wire to panel and paste yellow tape to LVDS wire as picture 2.
Locate SHD to MF as picture 3.
Paste 3 pieces of conductive tapes to SHD as picture 4
PICTURE 1 PICTURE 2 PICTURE 3
PICTURE 4
S4
Assemble Lamp wire
Insert lamp wire to SHD as picture 1.
Paste 6 pieces of adhesive tapes to fix lamp wire as picture 2.
Assemble Mylar to SHD as picture3.
PICTURE 1 PICTURE 2 PICTURE 3

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S5
Assemble CTRL BD, RC and
ASSY Stand.
Assemble CTRL BD to RC and lock 2 CTRL BD screws as picture 1.
Arrange CTRL BD FFC on RC and paste adhesive as picture 2.
Insert CTRL FFC to IF BD and paste AL foil on SHD as picture 4.
Assemble RC to MF and lock RC center screw as picture 5.
Assemble stand to RC and lock 4 RC screws as picture 6.
PICTURE 1 PICTURE 2 PICTURE 3
PICTURE 4 PICTURE 5
NOTE: Circuit boards >10 cm² has been highlighted with the yellow rectangle as above image shows.
Please detach the Circuit boards and follow local regulations for disposal.

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5. Troubleshooting
TROUBLESHOOTING
Before sending your LCD monitor for servicing, please check the trouble-shooting list below
to see if you can self-diagnose the problem.
(VGA Mode)
Problems
Current Status
Remedy
No Picture
LED ON
 Using OSD, adjust brightness and contrast to
maximum or reset to their default settings.
LED OFF
 Check the power switch.
 Check if AC power cord is properly connected to
the monitor.
LED displays amber
color
 Check if video signal cable is properly connected
at the back of monitor.
 Check if the power of computer system is ON.
Abnormal
Picture
Unstable Picture
 Check if the specification of graphics adapter
and monitor is in compliance which may be
causing the input signal frequency mismatch.
Display is missing,
center shift, or too
small or too large in
display size
 Using OSD, adjust RESOLUTION, CLOCK,
CLOCK-PHASE, H-POSITION and V-POSITION
with non-standard signals.
 Using OSD, in case of missing full-screen image,
please select other resolution or other vertical
refresh timing.
 Using OSD, in case of missing full-screen image,
please select other resolution or other vertical
refresh timing.
 Wait for a few seconds after adjusting the size of
the image before changing or disconnecting the
signal cable or powering OFF the monitor.
Abnormal
Sound
(Only
Audio-Input
model)
(Optional)
No sound, or sound
level is too low
 Check the audio cable with the host PC is
connected.
 Check if the volume setup of the host PC is in
minimum position and try to raise the volume
level.

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(HDMI/DP Mode)
Problems
Current Status
Remedy
No Picture
LED ON
 Using OSD, adjust brightness and contrast to
maximum or reset to their default settings.
LED OFF
 Check the power switch.
 Check if AC power cord is properly connected
to the monitor.
LED displays
amber color
 Check if video signal cable is properly
connected at the back of monitor.
 Check if the power of computer system is ON.
Abnormal
Sound
(Only
Audio-Input
model)
(Optional)
No sound, or
sound level is too
low
 Check the audio cable with the host PC is
connected.
 Check if the volume setup of the host PC is in
minimum position and try to raise the volume
level.

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6. FRU List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of
ACER XB323U. Refer to this chapter whenever ordering for parts to repair or for RMA
(Return Merchandise Authorization).
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date
information available on your regional web or channel. For whatever reasons a part number
change is made, it will not be noted on the printed Service Guide. For AUTHORIZED
SERVICE PROVIDERS, your office may have a DIFFERENT part number code from those
given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided
by your regional office to order FRU parts for repair and service of customer machines
NOTE: To scrap or to return the defective parts, you should follow the local government
ordinance or regulations on how to dispose it properly, or follow the rules set by your
regional office on how to return it.
Category
ACER DESCRIPTION
Description
PART NO.
LCD
LED LCD Panel AUO 32W
QHD M320DAN02.2 400nit
5ms 1000:1
LCM 32W
M320DAN02.2
KL.32005.012
BOARD
MAIN BOARD 2H1DP+S+U
AUO
PCBA IF BD MI S
XB323U 170 L5
55.TKWM3.007
POWER BOARD
2H1DP+S+U AUO
PCBA SPS BD MI
XB323U
55.TKWM3.002
FUNCTION KEY BOARD
WITH WIRE
PCBA CTRL BD MI
XB323U
55.TKWM3.003
USB BOARD
PCBA USB BD MI
XB323U
55.TKWM3.004
LED DRIVER BOARD AUO
PCBA LED DRV BD MI
XB323U
55.TKWM3.005
I/F BD
P/BD
CTRL BD
USB BD
LED Driver BD