fAULT
LOCATING
TESTS
(Cont)
brar
~top:
errors
are displayed as follows:
a.
Fail tgr-on
h. Pass
and
intermittent
tgr may be on if the failure
is
intermittent
.:.
Cundt
(gr-on
d.
Unct
tgr-on
e. The failing test number
is
displayed
in
S
reg
0-15 (hex). The first digit
is
the segment
in
which the failing test is
located.
If
the
first digit
is
zero, it is a
zero
cycle test.
Refer
to
SI-SO
Scopex.
10.
To
continuously
repeat
a failing test:
a.
Depress Test Mode Repeat key.
b.
Press Start key.
To
stop repeating, raise Repeat key.
II.
To continue testing after
an
error stop, press Restart FLT I/O (Repeat key must
he
up). Testing
will
continue until successful completion or another error.
12. To search for a specitlc test:
a.
Follow FLT procedure
up
to and including step 8.
b.
Enter the desired test number in 48-63
of
data keys.
c.
Enter the
l's
complement
of
the desired test number in 32-47
of
the data keys.
d.
Press S tore key.
e.
Depress Test Mode Repeat key.
f.
Press Restart FLT
I/O
key.
The tape will be searched until the desired test
is
located; it will then
be
repeated
continuously.
Scope Setup
l.
Repeat failing test (step 10 of
fLT
procedure).
2.
Set ROS address keys to J
50
(hex).
3. Sync scope
on
ROS address sync point at 01 C-A3H 1.
4. Place one probe on clock P2 0IB-CIF7DIO (RB817AC4) or an equivalent point.
Three clock pulses should be observed (except for segment
B,
which will have 2
dock
pulses).
5.
Use
third probe to test the points called
out
in Scopex, starting with the first line
of
the test.
Note:
Use
ALD's in conjunction with Scopex when scoping through a failing test.
Scopcx Definitions
I.
Zero-cycle Scopex (SI·S0), (Segment
0)
2065
Service Aids, Section
2,
Item AS.
Column
heading:-'''NU~1B''
I
hiS
IS the test llLllnber that will be displayed in S reg
0-15
when a test fails.
Column heading-"V"
A two-character field defining the state a tgr should assume for a given test and the
voltage level
that
should be observed at the specified pin. R=reset, S=sct,
1
=+
Level, 0= -
LeveL
Columns headed
pill,
net, and description are self explanatory.
50
5/360
MODEL 65
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