A-TECH MES SQA-Vb Technical Bulletin

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File Name: Tech Bulletin_SQA_Blank Screen_12_OCT_10 Page 1 of 3

TechnicalBulletin‐BlankLowerOperationalScreen

Appliestothefollowing:ALLSQA‐V(V,Vb,Ve,VpandVt)

Issuedate:October12,2010

Problem description: The lower, operational screen of the SQA is blank, but lit OR it displays black lines on a yellow

background.

Procedure

STEP1:

1. Re‐installtheSQA‐Vsoftware.

2. Ifthesoftwareissuccessfullyinstalledandthescreenisstillblank–gotoStep2

3. Ifthesoftwarewasnotinstalledsuccessfullybasedon:

a. ACKerror:ThisisaFLASHMEMORYfailure.TheSQA‐Vmustbesentback

toMESLTDforrepairasanRMA.

b. TIMEOUTerror:ThisisacommunicationfailurebetweentheSQAandthePC.VerifythattheSQA‐Vis

connectedtothecorrectCOMportonyourPCandalsothattheCOMportisdefinedproperly.

c. Iftheportisfunctioning:PresstheSERVICEbuttonwhilesequentiallyswitchingthedeviceonandofftwice.Try

toinstallthesoftwareagain.Iftheinstallationfailsagain–gotoStep2.



STEP2:

1. MakesurethattheSQA‐Visturnedoffand

dissconnectedfromanysourceofelectricity.

2. OpentheSQA‐V.

3. Verifythattheharnessthatconnectsthe

userscreenandthemainboardisinthe

correctpositionandisproperlyconnected

(seeFigure1).

4. Ifthe

problempersistsgotoStep3.



 

  MBsideLCDscreenside

Figure1:Verifytheflatcableisproperlyconnected

STEP3:

1. Verifythattheharnessconnectingthemain

boardtothePCisproperlyconnected(RS232

cable).

2. TightentheharnessconnectoratlocationJ5

onthemainboard(seeFigure2).

3. IftheproblempersistsgotoStep4.



Figure2:J5connectoronthemainboard

STEP4:

1. VerifythattheMainboardprocessorispositionedaccordingtotheinstructionsinAppendix1ofthisbulletin.

2. Replacetheprocessoriftheproblempersists.

3. Ifthescreenisstillblankafterreplacingtheprocessor‐gotoStep5.

STEP5:

1. ReplacetheLCDoperationalscreenaccordingtotheinstructionsinAppendix2ofthisbulletin.Theinstructionscanalso

befoundonPage19intheSERVICEMANUAL.

2. Iftheproblempersistswiththenewscreen–sendtheSQAbacktothemanufacturer(MES)forarepairRMA.



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

Appendix1:InstructionsforRE‐SEATINGorREPLACINGtheSQAPROCESSOR

Stage1:Re‐seatingtheprocessortothecorrectposition:



1. TurnofftheSQAanddisconnectthepowersupplycable.

2. Removethe4screwsontherearpanelusingaPhilipsscrew

driver#2(Fig.1)andopentheSQA(Fig.2)

3. Slightlypressthecenteroftheprocessor

withanindexfinger

tore‐seatitintothecorrectposition.(Fig.3).

4. ClosetheSQAandreplacethe4Phillipsscrewsontherear

Panel.

5. ConnectthepowercableoftheSQA‐V.

6. TurntheSQAonandruntheSELFTEST.

7. IftheSQA

‐Vpasses,therepairprocessiscomplete.

8. IftheSQA‐Vdoesnotturn‐onorfailsself‐test,gotostage2.



Fig.1‐2:OpentheSQA‐V



Figure3:Applydownwardpressuretotheprocessor



Stage2:Replacethedamagedprocessor:

1. TurnofftheSQAanddisconnectthepowersupplycable.

2. Releasethe4screwsontherearpanelusingaPhilipsscrew

driver#2andopentheSQA.



3. Removethedamagedprocessorusingtweezers(seeFig.4).



Fig.4:Removethedamagedprocessor

4.Replacetheoldprocessorwithanewprocessoraccordingto

thefollowingdirections:

• Alignthe“dot”whichismarkedontheprocessorwiththe

“Arrow”markintheprocessorcavity(seeFig.5‐6).

5. Slightlypressthecenteroftheprocessorwithanindexfinger

tore‐seat

itintothecorrectposition(Fig.7).

Fig.5‐6:Aligntheprocessorinthecavitycorrectly

6. Closetheunitandscrewbackinthe4Phillipsscrewsonthe

rearPanel.

7. Connectthepowercable,turnontheSQAandverifythatit

passestheSELF‐TEST.



Figure7:Re‐seattheprocessor

Arrow mark on

the processor

Dot mark on

the

rocesso

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File Name: Tech Bulletin_SQA_Blank Screen_12_OCT_10 Page 3 of 3

Appendix2:InstructionsforreplacingtheLCDoperationalscreen



A-TECH MES SQA-Vb Technical Bulletin

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