Acer KA272, Lifecycle Extension Manual

Page 1: ...1 ACER Monitor_KA272 LIFECYCLE EXTENSION GUIDE...

Page 2: ...ical Instruction 7 4 Assembly and Disassembly SOP 8 5 Troubleshooting 16 6 FRU List 20 Safety Notice Any person attempting to service this chassis must familiarize with the chassis and be aware of the...

Page 3: ...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 perfo...

Page 4: ...4 1 Exploded Diagram...

Page 5: ...5 2 Wiring connectivity diagram...

Page 6: ...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...

Page 7: ...7 4 Assembly and Disassembly Procedures Disassembly Procedure Step 1 Pull the base neck assembly out Step 2 Unscrew four screws Step 3 Separate hooks between MID_FRAME and R C...

Page 8: ...out all connectors Step 5 Unscrew screws on main shielding and disassemble AL tape Step 6 separate SPK from MID_FRAME and LVDS Backlight FFC from LCM Step 7 Unscrew two hex nuts and seven screws and r...

Page 9: ...in board and power board separate mylar and shielding Step 9 Unscrew eleven screws and separate MID FRAME and LCM Step 10 Separate lens from MID frame Step 11 Unscrew two screws and disassemble key bo...

Page 10: ...r cover Step 13 Unscrew the screw and separate base neck assembly Step 14 Remove six silicon rubbers and unscrew one screws to separate metal and plastic cover Step 15 Separate back cover from neck un...

Page 11: ...1 Assembly Procedure Step1 Assembly main board into shielding use screw to fix Assembly main board on LCM Step2 Insert 30 pin LVDS FFC to LCM Step3 Lock the shielding on panel with screw in red circle...

Page 12: ...e in blue circle Step5 Insert 10 pin back light FFC to panel and main board use yellow tape to fix Tape in red circle Step6 Insert 10 pin back light FFC and 30 pin LVDS FFC to main board Use yellow ta...

Page 13: ...13 Step7 Tape AL tape to fix FFC Tape in red circle Step8 Assembly middle frame with LCM and fix screw in red circle Step9 Lock middle frame screw in red circle BV277 VG270 CB272 KA272 bmiprx...

Page 14: ...ly speaker cable on main board red and white cable is on left side yellow and black is on right side Step11 Tape speaker cable with acetate cloth tape in yellow circle and yellow tape in blue circle S...

Page 15: ...15 Step13 Assembly rear cover and push around the surrounding to assembly well Step14 Lock the screw on rear cover in red circle...

Page 16: ...plug into AC source AC power Check adaptor Key s LED indicator is light or blink No input signal BLACK screen but a little light Re insert 30pin LVDS cable between LCM and main board Still BLACK scree...

Page 17: ...i Key Debug Replace keyboard Check U12 works END N Y Key works Disconnect LVDS cable Replace panel Check set is ok Check U12 works N Y Check LCM power R82 5V ok Check Q1 pin2 is 5V N N Y Check Q2 pin2...

Page 18: ...debug flow bi Disconnect LVDS cable Replace panel Check set is ok Check U400 works N Y Check LCM power R500 5V ok Check Q500 pin2 is 5V N N Y Check Q501 pin2 is high 2 4V LCM power Debug Y N Y Replace...

Page 19: ...19V Replace FB36 FB36 is open BD4 is damaged BU3 is damaged Replace BU3 Check U12 works END N Y Y N Y N Replace BD4 Backlight on Y N BR31 is open Replace BR31 Y N Open BR67 Y N Check BU5 pin5 is high...

Page 20: ...20 6 FRU Field Replaceable Unit List...