Acer K272hl Monitor Lifecycle Extension User Guide

acer K272HL Monitor Lifecycle Extension User Guide

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.

Exploded Diagram

Product Exploded Diagram

Wiring connectivity diagram

There are four types of wiring diagrams for model K272HL. 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
   

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

Disassembly and Assembly SOP

K272HL

Disassembly Procedures
Preparation before disassemble Clean the room for disassemble Identify the area for monitor 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 Prepare the implement, equipment, materials as bellow: working table Screw-driver: Philips-head screwdriver, Hex-head screwdriver knife glove cleaning cloth 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	Before Disassembling & Assembling, monitor need to be put on the sponge and the Insulation glove must be wore during the process. Disassemble Stand and Base from the RC(Rear Case). Unlock RC screws. Disassemble RC from monitor.
S2 Disassemble SHD and MF	Tear down AL-Tape off SHD(Shielding) as picture 1. Unlock the Hexagonal screws as picture 2. Unlock 9 MF screws and 2 trim screws as picture 3.
S3 Disassemble the lamp wire	Tear off the tape on the lamp wire and etract the lamp wire form the P/BD(Power Board) as the picture
S4 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 and disassemble the CTRL BD-FFC
S5 Disassemble the Bezel from panel.	Tear off the tapes, take out the Panel and the CTRL BD of the Bezel
S6 Disassemble I/F BD and P/BD from SHD.	Disassembled the Mylar and 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.

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.

Assembly Procedures
Preparation before disassemble Clean the room for disassemble Identify the area for monitor 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 Prepare the implement, equipment, materials as bellow: working table Screw-driver: Philips-head screwdriver, Hex-head screwdriver knife glove cleaning cloth ESD protection After unplugging the power cord, the power board still have power energe. Please pay attention when disassembling/assembling Power BD.
S1 Assemble I/F BD and P	Before Disassembling & Assembling, monitor need to be put on the sponge and the Insulation glove must be wore during the process. Insert the FFC to the I/F. Insert the P/BD-Wire to the I/F BD and the P/BD. Place the I/F BD and the Power BD to main SHD. stick one tape on the SHD remarked with red circle and lock all screws as the picture. Put Mylar on the Power BD
S2 Assemble MF and Panel	ake the Panel and insert lamp wire to panel Assemble the MF to the panel ,and lock 9 screws to the MF as the picture
PICTURE 1
S3 Assemble SHD	Lock the Hexagonal screws as picture 1. Use jig to put the SHD in correct position on Panel. Take off the jig and stick two AL tapes as picture 2
PICTURE 1 PICTURE 2 Note: please refer to Appendix for the jig and select “None” for page scaling item
S4 Assemble LVDS cable	Insert the LVDS cable to the Panel and stick one tape on LVDS cable
S5 Assemble the lamp wire	Insert the lamp wire to the P/BD . Stick 2 tape to fasten the lamp wire and one AL-Tape on SHD as the picture.
S6 Assemble CTRL-BD	Insert the CTRL BD-FFC to CTRL BD as circle frame, and insert them into the bezel. Assemble the panel on the bezel. Stick Mylar on CTRL BD FFC as square frame and Insert the CTRL BD -FFC to the PCBA as circle frame.
S7 Assemble RC, stand and base	Assemble the RC with screw. Assembly the Stand and the Base to Monitor
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.

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)

(HDMI/DP Mode)

FRU List

This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of ACER K272HL. 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 c heck 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.
	LED LCD Panel AUO 27’H FHD None Glare M270HVN02.3 Q0-Z19 LF 300nit 12ms VA	LCDM 27W AUO M270HVN02.3Q0 Z	KL.27005.021
BOARD
	MAIN BD	PCBA IF BD MI VA270H AUO H+S	55.T5UM3.001
	POWER BD	PCBA SPS BD MI H+S V276HL AUO	55.T5UM3.002
	CONTROL BOARD	PCBA CTRL BD SMD B276HL	55.T4HM3.003