Acer V277 Скачать руководство пользователя страница 18 | Manualshive

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Acer V277 Скачать руководство пользователя страница 18

18

5.4 LED backlight debug flow

：

LED driver Debug

Check Net

19V_BLD is

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 ?

Check NET BL_CTRL
level is high?

Reassemble BR67

Y

N

Y

Y

N

Replace BU5

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Содержание V277

Страница 1: ...1 ACER_V277 LIFECYCLE EXTENSION GUIDE ...

Страница 2: ...ture 6 4 Assembly and Disassembly Procedures 7 5 Troubleshooting 15 6 FRU List 19 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 Important Safety Notice ACER S190HQL 1 ...

Страница 3: ... 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 pr...

Страница 4: ...4 1 Exploded Diagram ...

Страница 5: ...5 2 Wiring Connectivity diagram ...

Страница 6: ...e 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 cleaning cloth ESD protection ...

Страница 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 Rear cover ...

Страница 8: ... up the Rear Cover and pull out all connectors Step 5 Unscrew screws on main shielding and disassemble AL tape Detail AL tape location as below Step 6 Separate speaker from MID_FRAME and LVDS Backlight FFC from LCM ...

Страница 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 panel Step 10 Separate lens from MID frame Step 11 Unscrew two screws and disassemble key board from rear cover and separate navi key cable ...

Страница 10: ...r cover Step 13 Unscrew the screw and separate base neck assembly Step 14 Remove six silicon rubbers and unscrew seven screws to separate metal and plastic cover Step 15 Separate back cover from neck unscrew five screws and separate front cover from hinge assy ...

Страница 11: ... into shielding use screw to fix Assembly main board on LCM Step2 Insert 30 pin LVDS FFC to LCM then use acetate cloth tape to tape FFC Step3 Lock the shielding on panel with screw in red circle Step4 Use Al tape to fix shielding tape in blue circle ...

Страница 12: ...n 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 Step7 Tape AL tape to fix FFC Tape in red circle Step8 Assembly middle frame with LCM and fix screw in red circle ...

Страница 13: ... assembly 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 Step12 Insert key board FFC on main board B277 with USB hub model also need to insert USB FFC on main board ...

Страница 14: ...14 Step13 Assembly rear cover and push around the surrounding to assembly well Step14 Lock the screw on rear cover in red circle ...

Страница 15: ... 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 screen 5VD_REG 3V3D_REG on main board is normal Check Main board LCM broken END N Y blink light Y N ...

Страница 16: ...x bip 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 is high 2 4V LCM power Debug Y N Y Replace Q1 END ...

Страница 17: ... 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 Q500 END ...

Страница 18: ... 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 Check NET BL_CTRL level is high Reassemble BR67 Y N Y Y N Replace BU5 ...

Страница 19: ...01 04 24 100mm W B LF CABLE 50 TFQM5 002 R046728081101 WH FFC 8P 0 5mm 750mm 3FOLD 60V A8 A5 LF CABLE 50 TFQM5 003 R046728081091 WH FFC 8P 0 5mm 670mm 3FOLD 60V A8 A5 LF CABLE 50 TFQM5 004 R046128101010 WH FFC 10P 0 5mm 600mm 4FOLD 90V A8 A12 V CUT LF CABLE 50 TFQM5 006 R046128101000 WH FFC 10P 0 5mm 600mm 4FOLD 90V A8 A12 V CUT LF CABLE 50 TFQM5 005 R046128301900 WH FFC 30P 1 0mm 500mm 2FOLD 90V ...

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