BenQ DV M21 Manuel utilisateur

BENQ

DVM21

servicemanual



Preliminaryversion

2009/12/11

Content

1.Aboutthismanual.....................................................................................2

2.Safetyprecaution......................................................................................2

3.Thefirmwareupdateprocedure...............................................................2

4.DisassemblyProcedure.............................................................................6

5.TheTroubleshootingguide.....................................................................17

6.TheBillofMaterial..................................................................................22

7.Schematicsdiagram................................................................................40





1. Aboutthismanual

Thisservicemanualcontainsinformationformaintenanceand

serviceofDVM21;highdefinitioncamcorder.Themanualmight

guide&helpyoutodothesystemdiagnostics,Firm/Wareupdate

andtheproducttroubleshooting.



2. Safetyprecaution

2.1 ThisproductcontainsHighVoltagecircuitmighthurtsservice

peoplewhomwithoutelectronicknowledgeorinadequate

training.

2.2 WarningtoaCardiac,foryourhealthy&avoiddangeroushigh

voltageelectricshock,westronglysuggestyoudonottryto

opening&servicingthisproduct.

2.3 BesuretodischargetheHighVoltagestorageenergypriorto

disassemblytheenclosure.

i.e.removeentirelypowersources(Li‐ionbattery,AAbattery&

USBport)&wait30minutesforcircuitryselfdischarge.



3. Thefirmwareupdateprocedure

3.1 Installtheupdatetool,(“DU,DirectUSB”)inyourcomputer.

3.2. Launch“DU”utility,thenthedialogueboxwillappearas

below.





3.3. ConnecttheUSBcablebetweenPC&Camcorder.

3.4. Configuretheproduct;selectyourmainboardconfiguration&

DRAMspeedthatmeetsyourcamcorderspecification.

3.5. Therearetwosourcepaths;oneisforentirelyerasingtheflash

memory,andanotheroneisforquickupdatepurpose

respectively.

3.6. The“BootLoader”pathisforentirelyerasingtheflashmemory

whenfataldesignchanges.

3.7. Usingthe“BootLoader”pulldownmenutobrowsethelocation

ofspecialerasing/replacementfirmwareprovidedbytheDSP

supplier;named“amboot_kernel_fomfs_dsp_release.elf.bin”.



3.8. Usingthe“Firmwareprogramming”pulldownmenutobrowse

thelocationofnewfirmwaretobeupdated,e.g.C:\Documents

andsetting\Myfile\Programmingcodes\

amboot_xx_xxx_dsp_releasexx.elf

3.9. Forquickupdate;select“Firmwareprogramming”optioncheck

&press“Connectbutton”toconnectcamcorderandthenpress

“Download”buttontoupdatenewfirmware.



3.10. Forfataldesignchangewillerasetheoldfirmwareresidentin

thecamcorderfirst,otherwisethecamcordermightwork

improperly.



3.11. Select“BootLoader”optioncheck&press“Connectbutton”

toconnectcamcorderandthenpress“Download”buttonto

entirelyerasingtheflashmemory.



3.12. Andthenexecutionstep3.9quickupdateFirmware,thenyour

camcorderhasbeencompleteupdated.





4. DisassemblyProcedure

4.1. Toolused:

Atweezers,ascrewwrench,amagnetic,anantiESDsponge,an

ESDdischargingwriststripandasolderiron.



4.2. BesuretofullydischargetheHighvoltageenergypriorto

disassembletheunit,refertoSafetyprecautionsection2.2

~2.4.

4.3. Stickingasmallmagnetonthewrenchtipasphotoshown

belowforeasyhandlingthesetinyscrews.



4.4. Releasebothscrewsasphotoshownbelow:



Note:(0.7kgf‐cm)torquescontrolisessentiallyforre‐assembly

otherwiseovertorquemightpermanentdamagetoyour

camcorder.



4.5. Then,releasebottomsidescrews:





4.6. Then,releasebothIOboard’sscrewsundertherubbercover



4.7. Pull&partiallyopenthefrontendoftheLCDmodulecarefully.



4.8. PartiallyopentherearendoftheLCDmoduleverycarefully,

otherwisetheflatcables,FPCB,connectbetweenLCM&main

boardwillbedestroyed.



Note:That’salittletoughtodisassembletheLCDmodule;

coursedof4ribs/hooksclampinner.Pleasebepatientandtake

yourtime.





4.9. Releasetheedgescrewverycarefully,don’tdamegetheFPCB,

FlatCable.



ImportantNote:That’saspecialdesign;narrowheadscrew

dedecateforhere,limitspace;wrongtypeofscrewusedmight

causedFPCBcabledemage.



4.10. Peelofftheyellowtapesusingthetweezers.



4.11. UnlocktheFPCBconnector’slatch&releasetheFPCBcables.

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