3 Required Test Equipment
Many
of the service and repair problems with the D·
75
can be performed with a limited amount
of
test
Equipment Requirements
Oscilloscope
Capable
of
displaying a
IOMHz
signal
Volt-Ohmmeter
Low-voltage resistance probe
lOOmv
(range). High-voltage
resistance probe
(I.5V range)
Fr
cq
. Counter
Signal Generator
Sine!Square
wave
available;
flat
frequency responce.
TIlD .1%
maximum
Circuit Breaker
15
ampere rating
AC
Line
Vo
l
tag
e
Peak:
reading meter (displays
Mo
nitor
rms
equivalem to a
sinusoidal peak for any
waveform)
equipment. However,
in
order
10
return
the unit
to
its
"factory
new"
specifications.
the
fol
lowing list ofrequircd
test
equipment
is
recommended. The "Requirements"
co
lumn
provides information
to
allow intelligent selcctin
of
substituleS if the "Suggcsted Supplier and Mode'" is
not available or is considered impractical
to
obtain.
Application
Su
ggested Model
Monitoring output during
Telequipmcnt
D54A
or
service and
testing
equivalent
Check resistance values
Auke
8024 or equivalent
(low voltage probe). Check.
se
mi
co
ndu
ctor junctions
for
opens
or
shorts (high
voltage probe)
Check
DC
voltages
For accurate general
Heath
SM
I
18A
monitoring
Prov
ide
teSt
signals for
Wavctek
130
-Series or
service and checkout
equivalent
In
AC
line to
unit.;
proteCtS
circ
uitr
y
from
ove
rload
if
power supply has shorted
Monitor Line voltage Circ
uit
available
from
Crown
R9qired
Test
Equipmefll
3·1
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