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rJION€EfiT
CONDITIONS FREOUENTLY
MISTAKEN
FOR
MALFUNCTION
The
SD-
1
1
00
precision
test
equ
ipment also has
many
controls, therefore
even
a
rudimental
mis-operation
may
show
a
symptom
which
may
be
taken
for
a
trouble.
lf
any
Symptom
Possible cause
or
reason
Remedies
c
o
a
O
o
-o
f
a
o
E
o
c
G
O
With thE
FUNCTION
SWITCH
on,
power
is
not
supplied.
Fuse has
blown.
(a)
Power
cord is
not
plugged
in
the
outlet
completely.
(b)
(a)
Check the
fuse.
(b)
Check
the
connection.
Bright line
will
not
appear
on the CRT
screen-
INTENSITY
knob
on
the
rear
panel
is
turned
fully
counterclockwise.
(a)
The VERTICAL
and
the
HORTZONTAL
POSITION
KNOBS are
not
set
to
proper
positions.
(b)
(a)
Readjust
tne irulel:SttY
knob
to obtain
rhe
optimum
brightness.
{b)Set
the
POSITION
KNOBS
to
the
middle
point
of
the controlling
range.
Spot
is
dark
or
no spot
on
the
CRT
screen.
Protection
circuit
ls
working.
Feed
input
signal
to
the
INPUT
TERMtNALS,,l,,
or
"3"
,
and obtain
a
waveform
having
an
ampli.
tude
of
more than
3/8".
The protection
circuit
will
be
released.
Pattern on
the
CRT
screen
is
out
of
focus.
When brightness
is
adjusted.
Ad.lust
the
FOCUS
control knob
on
the
rear
panel
to
obtain the
sharp focus.
Pattern on
the
CRT
screen
vacil lates.
I
nterference between
measuring
f
requency
and
the
line
frequency.
(a)
lnterference
by
magnetic AC
f
lux.
(b)
The line voltage
is
not
stable.
(c)
(a)
Use
a
frequency
slightly different
from
the
line
freq uency.
(blDo not
use
the
SD-11O0
near
a
transformer
or
a
motor
with
large leakage
flux.
{c)
Provide
a
voltage regulator
to
the
power cord
to
obtain the
rated
voltage.
OnlV horizontal
or
vertical
pattern
appears
on
the
C
RT
screen
.
The GAIN'CONTROL KNOB
is at
the
minimum position.
(a)
Connection
of
cords is
not
complete.
(b)
The
OSCILLATOR
LEVEL
CONTROL
KNOB
is
at the
minimum position
or
at
OFF.
(a)
Oscillation
appears
to
stand
still
during
an
auto
sweep
operation.
(b)
lf the
OSCILLATOR
FREOUENCy
CONTROL KNOB
is
turned
too
quickty,
oscillation
maV
stop.
(c)
(a)
Reset
the knob to the
proper
position.
(b)
Connect the cords completely.
{
'6
o
.9
!
f
No
oscillating
output
{a)
Reset
the knob
to
a
proper
position.
(b)
An
automatic
sweep
operation
resumes
in
more
than
10
seconds
after a
previous automatic
sweep
operation
has
completed.
Do
not
fumble
with
any
switch and knob
until
a
sweep
operation
resumes.
{c)
Return
the
knob
to a
lower
frequency
position
and
turn
it
back
to
the
desired
position
gently.
Output
is too
small
A
device having an impedance
lower
than
1
0
kA
is
connected
to
the
output
terminal
of
the
SD-1
1
00.
A
device
to
be connected
to
the output
terminals
should
have
an
impedance higher
than
bO
kfi,
if
poss
ible.
Output
is
distorted.
If
thE
OSCI
LLATOR
LEVEL
CONTROL
KNOB
is set
to
the
maximum
with
a
low
impedance connected
to the
OSCIL-
LATOR
OUTPUT
TERMINALS,
it
witt
cause an
overload.
Connect
a
device having
an
impedance
higher
than
50
ks,.
o
o
E
o
o
_t
Level meter
will not
de.
Fl
ect.
Connection
of
cords
is
not
complete.
(a)
The
LEVEL METER
SWTTCH
is set to
oFF.
(b)
(a)
Connect the cords completely.
(b)
Turn
the
switch
clockwise.
Level indicated
by
the
LEVEL METER
does not
agree
with
the
level
of
the
pattern
on
the
CRT
screen.
Response
time
of
meter
def
lection
is
0.3
sec,
but
no
scope
circuit
has
time
delay,
also
meter
indicates
average
value
and
scope
shows peak
value
of
voltage.
This
phenomenon
is
by
no
means
a
trouble,
but
an
essential
matter.
Take
advantage
of this
inherent feature.
abnormal phenomenon
is
noticed
in your
SD-1100,
check
the equipment
for
a
possible
cause
and
a
correct
remedies
by
referring
to
the following
table.
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