Acer CB242Y User manual

Acer Monitor CB242Y
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
FFC LVDS
2
PCBA LED BD
15
ASSY SHD
3
Lamp wire
16
WIRE
4
LCDM
17
SCRW
5
MID-FRAME
18
ASSY RC
6
SCRW
19
PCBA CTRL
7
SPK
20
ASSY CLMN
8
SCRW
21
ASSY BASE
9
MYLAR
10
PCB SPS BD
11
PCB IF BD
12
MYLAR
13
SCRW

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2. Wiring connectivity diagram
There are two types of wiring diagrams for model CB242Y. 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
CB242Y
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.
S1
Disassemble the RC,
stand and base
Before Disassembling & Assembling, monitor need to be put on the sponge and
the Insulation glove must be wore during the process.
Disassemble base and column from the RC(Rear Case).
Unlock 4 RC screws and the RC center screw as picture 1.
Disassemble RC from monitor.
S2
Disassemble FFC Ctrl
from the PCBA.
Tear off the adhesive tape from the RC as picture 1.
Disassemble the CTRL BD from the RC and 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 lamp wire
Extract the FFC LED from the I/F BD and tear it off from 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 and Extract the lamp wire form the P/BD as
picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
S5
Disassemble the Trim
Unlock two screws from the ASSY TRIM and disassemble it from MF as picture 1.
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

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S6
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
S7
Disassemble I/F BD and
P/BD from SHD.
Unlock 2 hex screws from the SHD and unlock 5 PCBA screws as picture 1.
Extract P/BD wire from the IF BD, disassemble the IF BD from the SHD, and extract the
FFC from the IF BD as picture 2.
Disassemble the P/BD from the SHD and extract P/BD wire from the P/BD as picture 3.
PICTURE 1 PICTURE 2 PICTURE 3
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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4.2 Assembly 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.
S1
Assemble the MAIN board,
power board.
Before Disassembling & Assembling, monitor need to be put on the sponge
and the Insulation glove must be wore during the process.
Put the SHD on the worktable.
Assemble the P/BD to the SHD as picture 1.
Insert the FFC wire to the IF BD as picture 2.
Insert the P/BD wire to the IF BD as and assemble the IF BD to the SHD as picture 3.
Lock 5 screws as the picture sequence and lock 2 hex screws from the SHD.
PICTURE 1 PICTURE 2 PICTURE 3
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 lamp wire to the P/BD and 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 and 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 and 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 speaker on
the MF
Insert the speaker connect to the I/F BD as the picture.
Arrange the SPK wire on the Panel and stick 4 pieces of black tapes to fasten the SPK
wire as picture.
(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.)
S7
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 and 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 CB242Y. 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
SAMSUNG 23.8' FHD
LTM238HL06-M04 250nit
LCM23.8W
LTM238HL06-M04 P
KL.23806.006
BOARD
MAIN BOARD
1A1H1DP+S+L
PCBA IF BD MI CB242Y
DP+S
55.TPLM3.003
POWER BOARD
1A1H1DP+S+L
PCBA SPS BD MI CB242Y
SDC
55.TPLM3.005
FUNCTION KEY BOARD
W/ WIRE
PCBA CTRL BD MI B247Y
55.TJZM3.003
LED BOARD W/ WIRE
PCBA LED BD MI VG240Y
55.TG5M3.004
IF BD
P/ BD
CTRL BD
LED BD