SET S/H SAYITCH TO TFACK/HOLD,

FUNCTION TO DC, RAilGE ?O lOV.

It{G @R-A2'K1 SHOTJLO8E CLOSEO.SET SAM-

PLE RATE FULLY CLOCKS'ISEAPPLY. 10 v& tNruT-

CHECK VOLTAGE AT PIN ' NEAN TOP CENTER OF A2'. SHOULO SE NEAR ZERO. CH€CK WAVEFORiilI AT PINS2

AND 3 IN SATE U)CA?ION. EXTER. NALLY TRIGGEB SCOF€ Oil T€ST ?otNT x tN Loctc sEcTtoN oF 3!90A

MAIN CIRC-I'IT8OAFO. SHOULOAE:

PtN2

 

 

+45

V

H H o A

. l

U

L o v

 

PtN3

 

 

+45

V

HHoE

J

ll

L_ 0V

 

MLY FULLAANGE INR T Ot'lALL

RANGES IN SOTH TRACK/HOLD ANO ACOUIRE/HOLOOPERATION'

YES

SET S/H S:II,ITCHOFF, SAMPLERA?E FULLY CLOCKWISE,RANGE IO 1 V.

SHORT II{PUT TERMINAI.s. Cor{ilECT

TESTPOINT LTSTON A28 TO INGUARD GROUND. THEN SET 6VH S1INTCHTO TRACK/HOLD OR ACOUIRE/HOI'. ffECK VOLTAGEAT A27TPI.

SELECT IOV RANGE. TF CHECK IINEARIW 8Y A' PUTSOF r V.3V,6 V,7 V A

IS VOLTAGE OßIFTING T( lOmV/.?

VOLTAGE LESS TH/ i 12 V ANO DRIFTII{GI

TROUBLESHOOTAIPUFI€ rn,@t.

SET S/H SIVITCH TO TRACK.IHOLO OR ACOUIRE/HOLD. S€L€CT l0 V RAtrlGE. APPLY tovdc lNPUt. S€T SAPLE RATE FULLY CLOCKITIS€. A27KI sltoulD 8€ cLosEo.

TROUEL€sHOOT A27X2 ANO ORIVE ctRcutTs tN A27Ut0.

REMOVEA27 ANO A2A.REPLACEIVIIH

JUMP€R AOARDS A24 AND A25. SET

S/H SI\'ITCHTO OFF. CHECKOC OPER-

ATION.

T A27, A?a. MAKC SURETO

CABLESCORRECTLYGO. TO

SET S/H SiWIYCH TO ol tvavEFonMs aTPl{s t,2 l

EXTERNALLY TRIGGER TEST POINT K IN LOGICS

3,l9OAMAIN CIRCUITBOA SHOULOgE:

PINHMOA2 .F;t

PIN I F;;L

HMDS

J h a ^

HMOC

PIN 3 F*;l__

IF WAVEFORMSARE NOT A28UT4IS PROSASLYDEF

'E

AFPLY TO OPNOß (@Hz UN€l. FOR

ASE nilES BY m *"