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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.

Summary of Contents for KG251Q

Page 1: ...Acer Monitor KG251Q LIFECYCLE EXTENSION GUIDE...

Page 2: ...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 awar...

Page 3: ...iring 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 performin...

Page 4: ...1Q 4 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 A...

Page 5: ...agrams 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 Boa...

Page 6: ...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 Phi...

Page 7: ...ewdriver 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 assembli...

Page 8: ...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...

Page 9: ...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...

Page 10: ...k 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...

Page 11: ...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 PHAS...

Page 12: ...ord 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 On...

Page 13: ...e 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 t...

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