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WARNING:
STATIC-SENSITIVE
PARTS
- HANDLE
APPROPRIATELY.
7.
When
soldering,
be
sure
the soldering iron is
grounded.
8.
Before connecting jumpers, replacing
circuit
com-
ponents,
or touching
CMOS
pins
(to
replace
an
mtegrated-circuit device), be sure
to discharge
any
static
buildup as
described
in precaution
1.
Since
voltage differences can exist
across your
body,
use
only one
hand if
you
must touch
pins
on the
CMOS
device and associated
board
wiring.
9.
When
replacing
a
CMOS
integrated-circuit device
leave the device in its metal rail container or
con~
ductive
foam
until
you
insert it
into
the printed
circuit
module.
10. Connect
all
low-impedance
test equipment (such
as
pulse
generators,
etc.)
to
CMOS device inputs
af~te~
you
apply power to
the
CMOS circuitry.
Stm!la rly,
dtsconnect
such
low-impedance
equip-
ment before
you
turn off the
p
ower.
11.
Replacement
modules
shipped separately from the
factory will
be
packaged
in
a conductive
material.
Any
modules being transported from one area to
another should
be wrapped
in
a similar
material
(such
as aluminum foil). NEVER USE NON-
CONDUCTIVE MATERIAL for packaging
these
modules.
4.3
CHECKOUT AND TROUBLESHOOTING
PROCEDURES
Table 4-2 lists
steps
to
follow
for both
checkout
and
troubleshooting
of the
System
Analyzer.
For
best
results,
follow the
"Checkout
Procedures"
first
;
if you
encounter
problems as listed in the
"
Fault"
column
follow the
steps
listed under
"Troubleshooting
Pro~
cedures"
to
correct them. Because of the complexity
of the
system,
the table
covers
only the
major
failures
and
provides
only a guide
to the most probable failed
module. The table also assumes that all tests
prior
to
the failure point
have
been
successfully
completed, and
thus
t he
applicable circuits
a
re
okay.
Table
4-3
provides a
list of
the
system test
points
a
nd
their functions. To aid in troubleshooting, test points
are identified
on
block diagrams throughout this man-
ual.
Table
4-2.
System Checkout and
Troubleshooting Procedures
C'h
~ckuu
t
Prucedure
I
Fault
I
Truuhle~hootin
~
Proced
ure
POWER ON
I.
('h~<·k
thai
lhf
ac- input
select
switch
is
No
AC
indication.
I.
Check
the
ac
line
curd and
line
fuse.
Ill
I
:!11\
'.
With the frunt
panel's
2.
If
system
powers
up
normally
when
un, replace the
1 '0\\
'
EH
,
wi
1ch
at
DC
Otf.
cunnect
the
ACLED.
•
unil umler
1e~1
(liUTl
t<>
a 120· Vac
line
"'""'e.
\
'e rify
that the AC
and
(hen
H
ead~·
I.E~
a
re
nn.
:!.
S<·l
I
h~
1'0\VER
~wi tch
tn
O
N.
Verify
No
Oven
Ready
I.
C heck
fur
approximately+
U\
Vd cat.JI6
pin
1
uf
1 hdl
altf'r a
warmup periud
,
a
display
is
indication.
the
A
16
hoard.
If
it
is
nut present, check
the
fuse
,.
i,ihl
~
un
the
C' RT.
on
the
A:l
hoard
.
If
the
ruse
is okay.
replace the
Battery
Char)!er hoard
(A:I).
2. C heck
.)J6
pin
5
of A
16
for
+
9
Vdc and
.)
16 pinG
fur
approximately +i.5
Vdc.
lf.JI6 pin
!j
is
okay
and
.)I
f! pin 6 isO
Vdc.
replace the
LED.
If
the
+
9
Vdc
is
not presen
t
on.)
16 pin r,,
replace AI
G
.
System
won 'tturn
on.
I.
Check
lor
appruximalely +
J
.~
Vdc
at
TP:I
uf
the
Control
huard
IA4
).
If
it
is
nul
present,
replace the
Batter.
\
'
Charl{er
hoard (A:I)
.
2.
Check
lor
+f> Vdl·
at
TP5
and
+
11.:1 Vdc
at
TPii
of
t he
Control
hoard
IA4).
C
heck fur
-5.
1
Vdc
at
U2
pu1 Iflol
A4.
If one
uf
the•e ,·oltal(es
is
not
pre~ent,
replace the
Control hoard
IA·II.
I
4-2
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Table of Contents
Troubleshooting
