HP 3575A - Page 80

START
MEASU
B EMENT
CONOITIONS:
1) NO
SIGNAL
INPUTS
APPLIED,
2) PHASE
REFERENCEJ
+A
3} DISCONNECT
THE
INPUT
JUMP.
ER
ON 411
AND
CONNECT
DC
SUP-
PLY,
SET
TO O V,
TO Al ITP1
, CON,
NECT
Ai 1TP2
TO A11TP4
NOTE:
A loqicat
',i,,
is
+
2.4
to
S.0
V
DC
A togicat
,,O,,
js0toO4VDC
,l!/5
q
2830
Figure
5-l
1. Phase
Logic Troublcshooring
Trce.
5-
l915
-.r
0
SET DC
SUPPLY
TO
+
2.OO
V.
ARE
A11ICl PINS
3,6,8,
AND
IC4
PIN
11
LOGICAL
"1"7
PROBAaLI
CAUSE
: A
I I tC
t,
6, 7 OR
8.
(BEFER
TO
SCHE MAT
tC
o
)
ARE
A11JCl
PIN
4, IC3 PIN
8,IC4
PINS
6
AND
8
A LOGICAL
"O"?
PROBAB
LE
CAUSE:
A1ltCt,3OR
4.
(BE
FE R
TO
SCHEMATTC
o
).
SET DC
SUPPLY
TO,2.OO
V
ARE
A11IC1
PINS
3,
6, 8, A\D
IC4 PIN
11
A LOGICAL
"O"I
PROB
AA I
E CAUSF,
AIIICI,6,
/OB
8
(REFEB
rO
SCHEMATTC
O
).
ARE
A11IC1 PIN
4, IC3 PIN
8.IC4
PINS
6 AND
8 A LOGICAL
"l''?
PBOBABLE
CAUSE, A
I ]ICI,3
OR 4.
(REFER
ro
scHEMAlc
O
)
REFEB
TO
TABL
F
FOq
CTLCKING
A11tCl.2.3
AND 5