A-TECH MES SQA-Vb Technical Bulletin

Type
Technical Bulletin
www.mes-global.com
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File Name: Tech Bulletin_SQA_Blank Screen_12_OCT_10 Page 1 of 3
TechnicalBulletin‐BlankLowerOperationalScreen
Appliestothefollowing:ALLSQAV(V,Vb,Ve,VpandVt)
Issuedate:October12,2010
Problem description: The lower, operational screen of the SQA is blank, but lit OR it displays black lines on a yellow
background.
Procedure
STEP1:
1. ReinstalltheSQAVsoftware.
2. IfthesoftwareissuccessfullyinstalledandthescreenisstillblankgotoStep2
3. Ifthesoftwarewasnotinstalledsuccessfullybasedon:
a. ACKerror:ThisisaFLASHMEMORYfailure.TheSQAVmustbesentback
toMESLTDforrepairasanRMA.
b. TIMEOUTerror:ThisisacommunicationfailurebetweentheSQAandthePC.VerifythattheSQAVis
connectedtothecorrectCOMportonyourPCandalsothattheCOMportisdefinedproperly.
c. Iftheportisfunctioning:PresstheSERVICEbuttonwhilesequentiallyswitchingthedeviceonandofftwice.Try
toinstallthesoftwareagain.Iftheinstallationfailsagain–gotoStep2.
STEP2:
1. MakesurethattheSQAVisturnedoffand
dissconnectedfromanysourceofelectricity.
2. OpentheSQAV.
3. Verifythattheharnessthatconnectsthe
userscreenandthemainboardisinthe
correctpositionandisproperlyconnected
(seeFigure1).
4. Ifthe
problempersistsgotoStep3.

MBsideLCDscreenside
Figure1:Verifytheflatcableisproperlyconnected
STEP3:
1. Verifythattheharnessconnectingthemain
boardtothePCisproperlyconnected(RS232
cable).
2. TightentheharnessconnectoratlocationJ5
onthemainboard(seeFigure2).
3. IftheproblempersistsgotoStep4.
Figure2:J5connectoronthemainboard
STEP4:
1. VerifythattheMainboardprocessorispositionedaccordingtotheinstructionsinAppendix1ofthisbulletin.
2. Replacetheprocessoriftheproblempersists.
3. Ifthescreenisstillblankafterreplacingtheprocessor‐gotoStep5.
STEP5:
1. ReplacetheLCDoperationalscreenaccordingtotheinstructionsinAppendix2ofthisbulletin.Theinstructionscanalso
befoundonPage19intheSERVICEMANUAL.
2. IftheproblempersistswiththenewscreensendtheSQAbacktothemanufacturer(MES)forarepairRMA.

J5
connector
Note the alignment of
the red line on the cable
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File Name: Tech Bulletin_SQA_Blank Screen_12_OCT_10 Page 2 of 3
Appendix1:InstructionsforRESEATINGorREPLACINGtheSQAPROCESSOR
Stage1:Reseatingtheprocessortothecorrectposition:
1. TurnofftheSQAanddisconnectthepowersupplycable.
2. Removethe4screwsontherearpanelusingaPhilipsscrew
driver#2(Fig.1)andopentheSQA(Fig.2)
3. Slightlypressthecenteroftheprocessor
withanindexfinger
toreseatitintothecorrectposition.(Fig.3).
4. ClosetheSQAandreplacethe4Phillipsscrewsontherear
Panel.
5. ConnectthepowercableoftheSQAV.
6. TurntheSQAonandruntheSELFTEST.
7. IftheSQA
Vpasses,therepairprocessiscomplete.
8. IftheSQAVdoesnotturnonorfailsselftest,gotostage2.
Fig.12:OpentheSQAV
Figure3:Applydownwardpressuretotheprocessor
Stage2:Replacethedamagedprocessor:
1. TurnofftheSQAanddisconnectthepowersupplycable.
2. Releasethe4screwsontherearpanelusingaPhilipsscrew
driver#2andopentheSQA.
3. Removethedamagedprocessorusingtweezers(seeFig.4).
Fig.4:Removethedamagedprocessor
4.Replacetheoldprocessorwithanewprocessoraccordingto
thefollowingdirections:
Alignthe“dot”whichismarkedontheprocessorwiththe
“Arrow”markintheprocessorcavity(seeFig.56).
5. Slightlypressthecenteroftheprocessorwithanindexfinger
toreseat
itintothecorrectposition(Fig.7).
Fig.56:Aligntheprocessorinthecavitycorrectly
6. Closetheunitandscrewbackinthe4Phillipsscrewsonthe
rearPanel.
7. Connectthepowercable,turnontheSQAandverifythatit
passestheSELFTEST.
Figure7:Reseattheprocessor
Arrow mark on
the processor
Dot mark on
the
p
rocesso
r
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File Name: Tech Bulletin_SQA_Blank Screen_12_OCT_10 Page 3 of 3
Appendix2:InstructionsforreplacingtheLCDoperationalscreen
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A-TECH MES SQA-Vb Technical Bulletin

Type
Technical Bulletin

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