Acer KG251Q Bedienungsanleitung
Acer Monitor KG251Q
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.......................................................................................11
6. FRU List .....................................................................................................13
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 KG251Q
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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.
ACER KG251Q
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1. Exploded Diagram
1.1 Product Exploded Diagram
Item
ODM DESCRIPTION
1
ASSY TRIM
2
PCBA CTRL BD
3
MID-FRAME
4
PANEL
5
PCBA IF BD
6
PCBA SPS BD
7
ASSY SHD
8
LVDS
9
SPK
10
ASSY RC
11
ASSY CLMN
12
ASSY BASE
ACER KG251Q
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2. Wiring connectivity diagram
There are two types of wiring diagrams for model KG251Q. 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.
ACER KG251Q
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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
KG251Q
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 RC center screw and as picture 2.
Disassemble RC from monitor.
PICTURE 1 PICTURE 2
S2
Disassemble MF and
Trim
Unlock 8 MF screws and 2 trim screws as picture 1.
Disassemble all tapes, lamp wire and LVDS as picture 2.
PICTURE 1 PICTURE 2
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S3
Disassemble CTRL BD
Tear off CTRL FFC from P/BD and disassemble CTRL BD from Trim
S4
Disassemble I/F BD
and P/BD from SHD.
Disassemble SHD from panel and unlock 5 PCBA screws.
Tear off mylar, extract P/BD wire from the IF BD, disassemble the IF BD from the SHD,
and extract the FFC from the IF BD.
Disassemble the P/BD from the SHD and extract P/BD wire from the P/BD.
S5
Disassemble SPK.
Tear off 1 tape and disassemble speakers.
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.
CTRL BD
P/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: 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 SPK
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 speaker and stick 1 tape.
S2
Assemble I/F BD and P/BD
from SHD.
Insert P/BD Wire to P/BD and assemble the P/BD to the SHD.
Insert the FFC wire and P/BD wire to the IF BD and assemble the IF BD to the SHD.
Lock 5 PCBA screws and stick 1 mylar to fasten the wires.
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S3
Assemble Panel to MF
Take the Panel, insert lamp wire to panel marked as red frame.
Assemble the MF to the panel ,and lock 8 screws to the MF as the picture
S4
Assemble CTRL BD
Assemble Crel FFC to Ctrl BD and put them into trim, then lock 2 trim screws
S5
Assemble SHD
Locate the SHD, insert lamp wire to P/BD.
Insert FFC Ctrl to PCBA and insert LVDS to Panel
S7
Assemble the RC, stand
and base
Assemble the RC to the MF and Lock 1 screw as picture 1.
Assemble the column and base on the RC as picture 2.
PICTURE 1 PICTURE 2
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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