Acer B227U User manual

Acer Monitor B227U
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

ACER B277U
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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
17
ASSY RC
2
PCBA LED BD
18
SCRW
3
FFC LED
19
SCRW
4
LCDM27W M270DAN02.5 QA AUO Z
20
MYLAR
5
MID-FRAME
21
MYLAR
6
SCRW
22
PCB USB BD
7
SPK
23
FFC USB
8
SCRW
24
PCB USB SIDE BD
9
WIRE 6/6P 1061#30 175MM
25
SCRW
10
PCB SPS BD
26
MYLAR
11
PCB IF BD
27
ASSY CLMN
12
SCRW
28
ASSY BASE
13
FFC LVDS 30P P1 400MM
14
FFC LVDS 40P P.8 420MM
15
ASSY SHD
16
PCB CTRL BD

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2. Wiring connectivity diagram
There are two types of wiring diagrams for model B277U. 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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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:
- 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
B277U
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
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,
stand and base
Disassemble base and column from the RC. Unlock RC screws.
Disassemble RC from monitor.
S2
Disassemble FFC Ctrl
from the PCBA.
Tear off the adhesive tape from the RC(Rear Case). Tear off the FFC CTRL on the RC
as picture 1. Disassemble the CTRL BD from the RC. Disassemble the FFC CTRL from
the CTRL BD as picture 2.
PICTURE 1 PICTURE 2
CTRL BD
CTRL BD

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S3
Disassemble the speaker
from the MF
Tear off four BOPP tapes on the speaker wire. Extract the connect of the speaker from
the PCBA. Disassemble the speaker from the MF(Middle Frame).
S4
Disassemble the USB SIDE
BD
Tear off the Mylar on the right hole of the SHD as picture 1. Disassemble USB-FFC
from the USB BD. Unlock the screw from the USB SIDE BD and disassemble the USB
SIDE BD. Disassemble the USB-FFC from the USB SIDE BD as picture 2.
Disassemble the gasket from the back of the panel as picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
S5
Disassemble the lamp wire
Extract the FFC LED from the I/F BD. Tear off the FFC LED from the SHD as picture
1. Tear off the Mylar on the left hole of the SHD as picture 2. Tear off the BOPP tape
on the lamp wire. Extract the big connector of the lamp wire form the P/BD as picture
3.
PICTURE 1 PICTURE 2 PICTURE 3

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S6
Disassemble the Trim
Unlock two screws from the ASSY TRIM as picture 1. Disassemble the ASSY TRIM
from the MF. Disassemble the PCBA LED BD from the ASSY TRIM as picture 2.
Disassemble FFC LED from the PCBA LED BD as picture 3
PICTURE 1 PICTURE 2 PICTURE 3
S7
Disassemble the MF from
panel.
Extract FFC wire from the panel as picture 1.
Unlock 9 screws from the MF as picture 2.
Disassemble the MF from the panel. Extract the lamp wire from the panel as the
picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
S8
Disassemble the USD BD,
I/F BD and P/BD from
SHD.
Unlock 7 screws from the PCBA as the picture
Disassemble the USB BD from the SHD and extract the wire from the USB BD.
Disassemble the I/F BD from the SHD and extract the P/BD wire. Extract the FFC
LVDS from the I/F BD. Disassemble the P/BD from the SHD.
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
I/F BD
P/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 the MAIN board,
power board and USB board.
Put the SHD on the worktable.
Insert USB-I/F BD wire to the IF/BD. Locate the P/BD into the SHD.
Insert FFC LVDS to the I/F BD.
Insert the wire on the P/BD to the I/F BD. Locate the I/F BD into the SHD. Locate the
USB BD into the SHD.
Lock 7 screws as the picture sequence.
S2
Assemble the MF and panel
Take the Panel on the sponge cushion.
Insert the little connector of the lamp wire to panel as the picture 1, thread the lamp
wire out of the hole of the MF. Assemble the MF onto the panel.
Lock 9 screws to the MF as the picture as the picture 2.
Insert the FFC wire to the Panel as the picture 3.
Assemble the SHD on the MF as the picture 4.

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S3
Assemble the ASSY TRIM
Assemble FFC LED to the PCBA LED BD as the picture 1.
Assemble the PCBA LED BD into the ASSY TRIM.
Assemble the ASSY TRIM on the MF. Lock two MD screws to the ASSY TRIM.
S4
Assemble the lamp wire
Insert the big connector of the lamp wire to the P/BD .Stick 1 piece BOPP tape to
fasten the lamp wire as the picture 1.
Affix a Mylar on the left hole of the SHD as the picture 2. Tear off the four gums on
the FFC LED. Stick the FFC LED on regular mark wire on the SHD as the picture 3.
Insert the FFC LED into the I/F BD
S5
Assemble the Ctrl PCBA
on RC.
Assemble FFC Ctrl to the Ctrl PCBA as picture 1. Assemble Control BD to the RC.
Tear off the gums on the FFC Ctrl. Stick the FFC Ctrl on the RC. Stick 1 piece
adhesive tape on the point of inflexion of the FFC Ctrl as picture 2.

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S6
Assemble the USB SIDE BD
on MF.
Stick a gasket on the back of panel as picture 1. Assemble USB-FFC to the USB SIDE
BD as picture 2.
Assemble the USB-BD on the MF. Locate one screw to the USB SIDE BD. Tear off
the gum of the USB-FFC and insert the USB-FFC another end into the USB-BD. Stick
USB-FFC on the panel as picture 3. Affix a Mylar on the right hole of the SHD as
picture 4.
S7
Assemble the speaker on the
MF
Insert the speaker connect to the I/F BD as the picture. Arrange the wire of the
speaker (Attention: Keep the speaker wire straight, and the middle of the speaker wire
is not allowed to be placed on the step of the panel.) Tear four BOPP tapes and stick
them on the back of the panel to fasten the speaker wire as the picture.
S8
Assemble the RC, stand and
base
Insert the FFC Crtl into the BD. Stick the FFC Ctrl on the SHD as picture 1.
Assemble the RC to the MF. Lock 5 RC screws as picture 2.
Assemble the column and base on the RC.
PICTURE 1 PICTURE 2

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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 B277U. 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 27'H
QHD None Glare
M270DAN02.5 QA-Z19 LF
350nit 12ms 1000:1
LCDM27W M270DAN02.5 QA
AUO Z
KL.27005.033
BOARD
MAIN BOARD
2H+1DP+1mDP+S+USB
PCBA IF BD MI USB B277U
55.TDBM3.001
POWER BOARD USB+SPK
WITH WIRE
PCBA SPS BD MI USB B277U
55.TDBM3.002
FUNCTION KEY BOARD
WITH BUTTON
PCBA CTRL BD MI B277
55.TBTM3.003
USB BOARD
PCBA USB BD MI B277U
55.TBTM3.004
USB SIDE BOARD
PCBA USB SIDE BD MI B277
55.TBTM3.005
LED BOARD
PCBA LED BD SMD B277
55.TBTM3.006
IF BD
P/ BD
USB BD
USB
SIDE
BD
LED BD
CTRL BD