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Acer KA272 Lifecycle Extension Manual

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ACER Monitor_KA272
LIFECYCLE EXTENSION GUIDE
1

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Summary of Contents for Acer KA272

  • Page 1 ACER Monitor_KA272 LIFECYCLE EXTENSION GUIDE...

  • Page 2: Table Of Contents

    Contents Important Safety Notice ................3 1. Exploded Diagram ................4 2. Wiring connectivity diagram ..............6 3. Mechanical 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 necessary safety precautions to be used when serving electronic equipment containing high voltage...

  • Page 3: Important Safety Notice

    Important Safety Notice ACER S190HQL 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.

  • Page 4: Exploded Diagram

    1. Exploded Diagram...

  • Page 5: Wiring Connectivity Diagram

    2. Wiring connectivity diagram...

  • Page 6: Mechanical Instruction

    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 Knife glove...
  • Page 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 Step 4. Pull up the Rear Cover and pull 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 remove main board PCBA from main shielding.
  • Page 9 Step.8 Remove connecter cable and separate main 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 board from rear cover and separate navi key& cable...
  • Page 10 Step.12 Separate wall-mount BKT and display key from rear 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, unscrew five screws and separate front cover from hinge assy.
  • Page 11  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 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 tape to fix. BV277/VG270/CB272/KA272 bmiprx-其他...
  • Page 13 Step7. Tape AL tape to fix FFC. (Tape in red circle). BV277/VG270/CB272/KA272 bmiprx-其他接口 Step8. Assembly middle frame with LCM and fix screw (in red circle) Step9. Lock middle frame screw (in red circle)
  • Page 14 (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). Step12. Insert key board FFC on main board B277/V277/VG270/CB272/KA272 bmiprx-其他接口...
  • Page 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: Troubleshooting

    5. Troubleshooting Test flow for abnormal machine Start Power cord plug Check DC Power into AC source is 19V? power? Check adaptor blink Key’s LED No input signal indicator is light or blink? light Re-insert 30pin LVDS cable BLACK screen between LCM and main board but a little light? Still BLACK...
  • Page 17 5.2 key debug flow: Key Debug Replace keyboard Key works? Check U12 works 5.3 Panel debug flow (bmiix&bii): LCM power Debug Disconnect LVDS cable Check LCM power Replace panel (R82) 5V ok? Check Q1 pin2 is 5V? Check set is ok? Check Q2 pin2 is high?(＞2.4V) Check U12 works...
  • Page 18 Panel debug flow (bi): LCM power Debug Disconnect LVDS cable Check LCM power Replace panel (R500) 5V ok? Check Q500 pin2 is Check set is ok? Check Q501 pin2 is high?(＞2.4V) Check U400 works Replace Q500...
  • Page 19 5.4 LED backlight debug flow： LED driver Debug Reassemble BR67 Replace FB36 Check Net FB36 is 19V_BLD is open? 19V? BU3 is damaged? Replace BU3 BD4 is damaged? Replace BD4 BR31 is open? Replace BR31 Check BU5 pin5 Check NET BL_CTRL Open BR67 is high ? level is high?
  • Page 20 6. FRU (Field Replaceable Unit) List...