HP 203A - Required Test Equipment; Performance Checks

Model
203A
Section
V
Paragraphs
5-1
to 5-5
Table
5-1
SECTION
V
MAINTENANCE
5-1. REQUIRED TEST EQUIPMENT.
9-2.
Recommended
test
equipment
for
trouble-
shooting
and
performance
checking
is
listed
in
table
5-1.
Test
instruments
other
than
those
listed
may
be
used
if
their
specifications
equal
or
exceed
the
required
characteristics.
5-3. PERFORMANCE CHECKS.
5-4. Use the following front panel procedures to
verify
proper
operation
of
the
®
Model
203A.
The
Model
203A
and
test
equipment
should
be
operatedat
115/230 vac unless otherwise specified. If the Model
203A is not within specifications at any point in
this
procedure,
refer
to
paragraph
5-12,
ADJUST-
MENTS,
Table 5-1. Rec üred Test Equipment
Instrument Type Required Characteristics
Voltage Range: 0 - 50 volts
Input Impedance >10 M ohms
Accuracy: +1%
DC Voitmeter
AC Voltmeter
Oscilloscope
Voltage Range:
Accuracy: +2%
Bandwidth: DC - 5 me
Frequency
Counter
Range:
0.005
eps
-
60
kc
Performance
Checks
Distortion
Analyzer
|
Range:
5
cps
to
60
kc
Performance
Checks
|
%
Model
331A
Variable Transformer| Output Voltage: 103 - 127 vac
6 pin printed board
extender
15
pin
printed
board
Troubleshooting
extender
Adjustment
Thermal 500
Converter
‚45 VAC input, 7.0 mv
DC output +0. 2%
9 cps - 60 kc '
50 watts
Tip Temperature: 800°F
Tip Size: 1/16" - 3/32"
Round Tip Dia: 3/4"
Soldering Iron and
Tips
01760-3
1 mv - 100 v
Freq. Response: to 600 kc
5-5.
FREQUENCY
DIAL
CALIBRATION,
a.
Push
Model
203A
LINE
switch
ON.
Pilot
light
should
glow.
b.
Set
FREQUENCY
dial
to
6
(CAL);
PLIER
switch
to
CAL.
с.
Adjust
front
panel
CAL
АБУ
until
visualzero
beat
is
obtained
on
front
panel
pilot
light,
This
occurs
when
flashing
rate
of
the
pilot
light
approaches
zero.
MULTI-
d.
Connect
Model
203A
as
shown
in
figure
5-1.
e.
Rotate
FREQUENCY
dial
and
observe
Elec-
tronic
Counter
readings
at
points
shown
in
table
5-2;
counter
readings
should
be
within
limits
shown.
At
frequencies
below
100
cps
use
period
measurements.
Use
Recommended Model
®
Model
412A
Performance Checks
Performance
Checks
|
¢
Model
4038
or
® Model 400D/H/L
4; Model 175A with
09 Model 1780A Hori-
zontal Plug-In
é Model 1750A Verti-
cal Plug-In
tò Model 10003A
10:1 Probe
% Model 523C
Waveform Checking
Performance Checks
09 #5060-0651
Troubleshooting
Adjustment
09 45060-00417
Frequency Response | # Model 11051A
$
#8730-0016
Ungar No. 776 handle
with Ungar №. PL333
tiplet and Ungar No.
885 3/4" cups tip
Troubleshooting
Repair
5-1