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BEMOVE
44 ANO NEPLACE Ag ANO
A36.
MEASURE
+
12 V.
+
5 V. sd
.2
V
OUTGUARO
VOLTAGES.
+12V
AND
.2V
TEST POINTS
AAE ON A32 AND
+5V
TEST POINT
IS
ON
A33. VOLT.
AGES
MUST
AE
MEASURED
TO OUT.
GUABO
GAOUND T€ST POINT
ON
A33
OF A3O. ALLOW
+/.
16
TOLLEAANCE,
IROUELESHOOT
OUTGUARD
VOLT.
AGE
SUPPLIES.
+lzv
.nd
+5V
sUP-
PLI€S
ABE LOCATEO
ON OUTGUAFD
MOTHEF
EOAAO A3I.
,2
V
SUPPLY IS
OEVELOPEO FROM
SYST€M
CIOCK
MULTTVIAAATOF
ON
A32.
CHECK OPERATION
OF
ISOLAIING
PHOTO.TRANSISTORS
UI THFOUGH
UTI WITH A LOGIC PROBE
OF
BY
CONNECTItrG
A KNdN GOOD UNIT
IN
PABALLEL
WITH THE SUSPECTED
PHOTO.TNANSISTOR
IN THE 3$A.
A5O CHECK
ORIVE TRANSISTOFS
A@ AHFOUGH
@ ANO A35O1
THBOUGH
04.Se Note l.
ANE ISOLATION
CIRCUIE
OPERA-
TING
CORFECTLY?
THIS
CHECK
SUMES THAI
ONLY
ONE
GPIBPRINTEO
CIRCUIT AS€U-
aLY
15
OEFEqIVE.6rNG
A$€M.
BLIES IN GPIB
REPAIR
KIT NO.
OSS.A(rc,
SUSSTITUIE A$EMALIES
ON€ AT
A TIME IN
THE FOLLOWING
OROEF:
A32, A3, A36.
A34. AND
ISO-
LATION
SEMBLIES
AS ANO
A35
TOGETHEA.
AFTER
SUBSTITUTING
EACH
ASSEMBLY, PERFORM
THE
OPERATING
CHECK
GIVEN IN PARA.
GAAPH 5.7 OR
'9 TO
OETERMTNE IF
PROBLEM
IS
CLEAAED.Se
Note 2,
PROELEM
MAY AE
ON OUTGUAAD
MOTHER
BOAFO
A3i OR IN
A$It AUS.
SUBSTITUTE
NEW 'AFE
{KIT NO.
ogw@31) FoB
a3ru2 aND
3. TH|S
CHECKS
OATA ANO CdTNOL
LINE
BUFFERS
ANO GATES.
Se Note 2.
rcES ASCII OPERATE COFRECTLY?
USE APPROPAIATE
R
NOTEO IN THE FOLLO
REPAIR
OEFECTiVE
S
Hffi3
6E
CAAE II
HAXOLING
ISOLATION
SEüBIIES.
PHOTO.TAAilSISTOAS
U1
üBOUGH Ul' ARE VEFY
SENTIVE
TOTEqAXICAL
STßES.
iE
L.
s-
F
B
IE
o
a
t-
E
N
3490-D
-
338r