Maintenance
—
Type
575
Fig.
4*5.
The waveform
resulting
from
a failure of
V733.
This
waveform shows
collector
current disployed
vertically
and
col
lector
voltage
displayed
horizontally.
The CURRENT
OR VOLTAGE
PER
DIVISION
switch is
in
the .01
COLLECTOR
MA
position,
the
VOLTS/DIV
switch
is
in the 20 COLLECTOR
VOLTS position,
and
the
PEAK VOLTS
control
is
set
for
200
volts
output.
resistor and
produces
a
small
amount
of
vertical
deflection
on
the
face
of
the
crt. This
trouble
is
most
evident
when
the
PEAK
VOLTS
control
is
set
for
200
volts
and
the
CURRENT
OR
VOLTS
PER
DIVISION
switch
is
set
in
the
.01
COLLEC
TOR
MA
position.
The
cause
of
insufficient
or
no
output
voltage may
be
de
termined
by
checking
the
voltages
and
waveforms
at
various
points
throughout
the circuit
using
the
information
contained
on
the
schematic
diagram.
Since
this
is
an
unregulated
cir
cuit,
the
line
voltage
should
be
checked
first.
Voltage
checks
at
the output
of
the
rectifiers
should be
made
with
a
load
on
the
output
of
the
collector
sweep circuit.
A
satisfactory
load can
be
obtained
by
placing
the
DISSIPATION
LIMIT
ING
RESISTOR
switch
in
the
100
position
and
grounding
ter
minal
C
on
the
Transistor
Mounting
Plate.
The
load
then
can
be
switched
in
and
out
as
desired
through
use
of
the
transistor
selector
switch.
CAUTION
When
the
dissipation
resistors
are
used
as
a
load
for
the collector
sweep
circuit,
the
peak
collector
sweep
voltage
should
not
be
adjusted higher
than
70
volts
to
prevent damage
to
the
dissipation
re
sistors.
It
is
best to
perform
the
necessary
voltage and
waveform
checks
on
the
collector
sweep circuit
with
the PEAK
VOLTS
RANGE
switch
in
the
0-200
position.
In
this
position
the
en
tire
secondary
winding
of
transformer
T702
is
utilized
and
the
rectifiers
are
switched
into
a
series
connection.
This
makes
it easier
to
detect
troubles
resulting
from
a
defective
secondary
winding
on
T702
or
from
a
defective
rectifier.
If
the
circuit
is
unable
to
supply
the specified
currents,
one
or
more
of
the rectifiers
is
probably
at
fault.
However,
if
no
current
can
be
obtained
from
the
circuit
the
trouble
then
is
probably
an
open
current
measuring
resistor. These
resistors
are
shown
on
the
schematic
diagram
of
the
Horizontal
Am
plifier.
4-9
Summary of Contents for 175
Page 4: ...VWTICM OINltAlO TRANSISTOR CUM TRACfR UB l COUlClO r hokizoniai VCKIJ O lUnK Hix M Type 575 z ...
Page 6: ...NOTES ...
Page 26: ...NOTES ...
Page 48: ...NOTES ...
Page 54: ...Recalibration Type 575 C706 Fig 5 3 Left Side View 5 6 ...
Page 56: ...NOTES ...
Page 100: ...INPUT AMPLIF1E ...
Page 104: ...TYPE 575 TRANSISTOR CURVE TRACER ...
Page 108: ...OSCILLATOR 4OOV UNREG TYPE 575 TRAN5I5TOR CURVE TRACER AB ...
Page 115: ... 300 ...
Page 119: ...Type 175 Tent S N 570 PARTS LIST CORRECTION Change to Q233 151 0137 00 2N21U8 MIO 298 1165 ...