Acer B246HL User manual

Acer Monitor B246HL
LIFECYCLE EXTENSION
GUIDE

Contents
Table of Contents
Important Safety Notice.................................................................................3
1. Exploded Diagram......................................................................................4
2. Wiring connectivity diagram ....................................................................5
3. Mechanical Instruction..............................................................................7
4. Disassembly and Assembly SOP ............................................................8
5. Troubleshooting.......................................................................................14
6. FRU List .....................................................................................................16
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 B246HL
3
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.

ACER B246HL
4
1. Exploded Diagram
1.1 Product Exploded Diagram
Item
ODM DESCRIPTION
1
ASSY BZL
2
PCBA CTRL BD
3
LCDM 24W M240htn01.2 AUO
4
PCBA SPS BD
5
PCBA IF BD
6
FFC LVDS
7
ASSY SHD
8
SPK
9
ASSY RC
10
ASSY CLMN
11
ASSY BASE
12
SCRW MACH STEEL HEX #4-40 NI
13
SCRW TAP PH W/FL M3*6L
14
SCRW TAP PH W/FL M3*6L W-ZN
15
SCRW MACH FPH M4*10L B-ZN NYL

ACER B246HL
5
2. Wiring connectivity diagram
There are four types of wiring diagrams for model B246HL. 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 without USB, without HDMI/DP
2. SKU without USB, with HDMI/DP

ACER B246HL
6
3. SKU with USB, without HDMI/DP
4. SKU with USB, with HDMI/DP

ACER B246HL
7
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

ACER B246HL
8
4. Disassembly and Assembly SOP
B246HL
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(Rear Case), stand
and base
Disassemble Stand and Base from the RC(Rear Case). Unlock RC screws.
Disassemble RC from monitor.
S2
Disassemble
SHD(Shielding)
Tear down AL-Tape off SHDas picture 1.
Unlock the Hexagonal screws and the DP screw as picture 2.
PICTURE 1 PICTURE 2

ACER B246HL
9
S3
Disassemble the lamp wire
Tear off the tape on the lamp wire. Extract the big connector of the lamp wire form the
P/BD(Power Board) as the picture.
S4
Disassemble the USB
SIDE BD
(This step is only for SKU
with USB)
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 LVDS
CABLE and CTRL BD
Tear off the tape, pull out the FFC as picture 1. Pull the CTRL BD -FFC out of the PCBA
and the CTRL BD, tear off the tape, disassemble the CTRL BD -FFC
PICTURE 1 PICTURE 2
USB SIDE Board
USB Board

ACER B246HL
10
S6
Disassemble the MF from
panel.
Tear off the tapes, take out the Panel and the CTRL BD of the MF
S7-1
Disassemble I/F BD, P/BD
and SPK from SHD.
Unlock all screws.
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.
Disassemble SPK.
PICTURE 1 PICTURE 2
S7-2
Disassemble the USD BD,
I/F BD,P/BD and SPK from
SHD.
(This step is only for SKU
with USB)
Unlock all 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
P/BD
I/F BD

ACER B246HL
11
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.
S1-1
Assemble the MAIN board,
power board and SPK.
Insert the FFC to the I/F.
Insert the DP-Wire to the I/F BD and the Power BD.
Insert the Power BD-Wire and SPK-Wire to I/F BD,
Place the I/F BD and the Power BD onto main SHD and lock all screws.
Put Mylar on the Power BD.
S1-2
Assemble the MAIN board,
power board, USB board
and SPK.
(This step is only for SKU
wih USB)
Insert the FFC to the I/F. Insert USB-I/F BD wire to the IF/BD
Insert the DP-Wire to the I/F BD and the Power BD.
Insert the Power BD-Wire and SPK-Wire to I/F BD,
Place the I/F BD, the Power BD and USB BD onto main SHD and lock all screws.
Put Mylar on the Power BD.
USB BD
I/F BD
P/BD
I/F BD
P/BD
I/F BD
P/BD
P/BD

ACER B246HL
12
S2
Assemble the ASSY TRIM
Insert the C/B-FFC to C/B as circle frame, and insert them into the BZL
Assemble the panel on the BZL
Stick Mylar on C/B FFC as square frame and Insert the C/B-FFC to the PCBA as
circle frame.
PICTURE 1 PICTURE 2
S3
Assemble the lamp wire
Insert the big connector of the lamp wire to the P/BD .
Stick 2 tape to fasten the lamp wire and one AL-Tape on SHD as the picture.
S4
Assemble LVDS cable
Insert the LVDS cable to the Panel, and stick one tape on LVDS cable.
S5
Assemble SHD
Lock the Hexagonal screws and the DP screw as picture 1.
PICTURE 1

ACER B246HL
13
S6
Assemble the USB SIDE BD
on MF.
(This step is only for SKU with
USB)
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. Lock one screw to the USB SIDE BD. Tear off the
gum of the USB-FFC, insert the USB-FFC into the USB-BD and stick USB-FFC on the
panel as picture 3.
Affix a Mylar on the right hole of the SHD as picture 4.
PICTURE 1 PICTURE 2 PICTURE 3 PICTURE 4
S7
Assemble RC, stand and
base
Assemble the RC with screw.
Assembly the Stand and the Base to Monitor
GASKET
USB SIDE BD
USB SIDE
BD
I/F BD
USB SIDE
BD

ACER B246HL
14
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.

ACER B246HL
15
(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.

ACER B246HL
16
6. FRU List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of
ACER B246HL. 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 24'H
FHD None Glare
M240HTN01.2 0A-S11 LF
250nit 5ms 1000:1
LCDM24W M240HTN01.2
V00/0A AUO Z
KL.24005.006
BOARD
MAIN BD DP+S AUO
PCBA IF BD MI DP+S AUO
V246HL
55.LXXM3.001
POWER BD
PCBA SPS BD MI DP B246HL
55.LYDM3.001
CONTROL BOARD
PCBA CTRL BD SMD V226HQL
55.LY7M3.002
CTRL BD
IF BD
P/ BD