RCA Trans Vista 100 User manual
Technical
Manual
The
CTC
49
Color
Chassis
Trans
Vista
100
Technical
Manual
The
CTC
49
Color
Chassis
Prepared
By
RCA
Sales
Corporation
A
Subsidiary
of
RCA
Corporation
Product
Performance—
Technical
Training
600
North
Sherman
Drive
Indianapolis,
Indiana
46201
Trademark(s)
,
ARegistered
Marca(s)
Registrada(s)
Copyright ©
1970
by
RCA
Sales
Corporation
All
rights
reserved.
No
part
of
the
material
protected
by
this
copyright
may
be
reproduced
or
utilized
in
any
form
without
written
permission
from
copyright
owner.
Price $
4.50
First
Edition
7032
Punted
in
U.S
A.
•
" "
ell•
-
4,
4re*
e
•
CONTENTS
General
Description
1
RF
and
IF
System
7
The
Video
System
15
Horizontal
Deflection
27
Vertical
Deflection
35
First-
Level
Maintenance
43
Shop-
Level
Maintenance
57
1
FOREWORD
The
CTC
49
chassis
represents
the
first
of
a "
new
breed"
of
RCA
all-
solid-state
color
television
receivers.
This
is
particularly
true
from
the
standpoint
of
servicing.
The
extensive
use
of
plug-in
circuit
modules,
eleven
in
all,
a
tuner
which
may
be
exchanged
without
the
need
for
realignment
of
the
coupling
circuit
to
the
IF
amplifier,
a
solid-state
high-
voltage
quadrupler,
which
essentially
is
another
module,
and
the
use
of
plug-in
transistors
makes
it
possible
to
correct
most
failures
with
very
little
servicing
effort.
In
the
preparation
of this
manual
less
than
the
usual
space
was
devoted
to
circuit
description
for
three
reasons.
First,
some
of
the
circuitry
bears
a
close
resemblance
to
earlier
RCA
chassis.
This
is
true
of
the
tuner,
AFT,
and
horizontal
deflection
system,
which
are
similar
to
their
counterparts
in
either
the
CTC
40
or
CTC
47
chassis;
and
the
sound
module
which
is
almost
identical
to
the
one
used
in
the
CTC
41, 42,
and
43
chassis.
Second,
integrated
circuits
are
used
in
the
IF
and
chroma
circuits,
and
a
stage-
by-
stage
analysis
of
these
systems
has
little
value
to
the
service
technician,
since
many
active
devices
are
packaged
in
a
single
unit.
Third,
since
most
repairs
can
be
accomplished
most
readily
by
module
replacement,
rather
than
by
replacement
of
a
single
component,
an
intimate
knowledge
of
the
function
of
each
part
in
a
module
is
not
essential
to
the technician.
Complete
schematic
diagrams
of
the
various
circuits
were
used
instead
of
partial
or
simplified
diagrams.
This
will
allow
the
technician
to
identify
all
components
of
a
particular
circuit
without
tracing
the
interconnecting
lines
used
in
the
complete
instrument
schematic
which
is
bound
in
the
back
of this
manual.
Whenever
possible
the
location
of
components
in
the
diagrams
located
in
the
text
is
indicated;
however,
the
complete
instrument
schematic
should
be
consulted
to
verify
component
locations
and
intermodule
connections.
Servicing
information
contained
in
this
manual
is
divided
into
two
chapters.
The
first
of
these
discusses
techniques
and
procedures
for
rapid
servicing
either
in
the
home
or
the
shop.
The
final
chapter
goes
into
greater
detail
and
considers
those areas
of
servicing
which
require
the
facilities
and
equipment
normally
found
only
in
the
service
shop.
GENERAL
DESCRIPTION
The
RCA
CTC
49
chassis
is
a
fourth-
generation
solid-state
color
receiver,
employing,
for
the
first
time,
plug-in
modules
for
most
of
the
essential
functions.
The
CTC
40
chassis,
introduced
in
1968,
is
the
first
of
the
RCA
solid-state
color
receivers;
however,
a
vacuum-
tube
high-
voltage
rectifier
was
used
in
that
instrument.
Next
in
order
of
introduc-
tion
was
the
RCA
CTC
47
chassis (
the
G-2000),
which
was
released
in
1969.
This
instrument
re-
tained
most
of
the
circuits
used
in
the
CTC
40,
but
several
significant
changes
were
incorporated
in
its
design.
The
electronically
tuned
VHF
tuner
and
signal-
seeking
UHF
tuner
of
the
CTC
47
are
im-
portant
advances
in
the
state
of
the
electronic
art,
and
because
of
their
spectacular
perform-
ance
they
tend
to
overshadow
two
other
important
advances.
These
are
solid-state
high-
voltage
rec-
tification,
using
a
voltage
quadrupler,
and
motor-
less
remote
control,
of
volume,
tint,
and
color.
The
RCA
CTC
44
chassis
represents
the
third
gen-
eration
of
solid-state
color
receivers
and
corn-
prises
many
of
the
basic
circuit
configurations
of
the
CTC
40,
upgraded
in
many
respects,
plus
the
high-
voltage
quadrupler
and
motorless
remote
control
of
volume,
tint,
and
color,
from
the
CTC
47.
The
CTC
49
is
a
natural
outgrowth
of
these
prede-
cessors;
however
a
number
of
radical
changes
have
been
made.
Two
of
these
are
perhaps
equal-
ly
significant.
These
are
modular
construction,
and
the
extensive
use
of
integrated
circuits.
Other
ad-
vances
include
active
side-
pincushion
correction,
transformerless
vertical
output,
matrixing
of
the
color-
difference
and
luminance
signals
before
they
are
fed
to
the
kinescope,
significant
changes
in
the
convergence
circuits,
and
a
110
color
kinescope.
These
will
be
described
in
this
book,
but
before
proceeding
to
circuit
descriptions,
an
overall
examination
of
the
chassis
is
in
order.
Figure
1-1
is
a
block
diagram
of
the
RCA
CTC
49
chassis.
A
total
of
eleven
plug-in
modules
is
used;
a
brief
description
of
each
module
follows:
1
UHF
ANTENNA
—11e.
VHF
ANTENNA
UHF
TUNER
VHF
TUNER
4.5-
MHz
SOUND
IF
AF
T
kT
MODULE
MAH
HORIZ
AFC
HORIZ
OSC
HORIZ
TRIGGER
MODULE
PM
200
SOUND
DETECTOR
AUDIO
PREAMP
MODULE
MAK
SIGNAL
I
PIX
IF
AGC
AGC
AFT
VIDEO
PREAMP
BLACK
AND
WHITE
VIDEO
SYNC
MODULE
MAG
VERT
SWITCH
VERT
PREDRIVER
VERT
DRIVER
SWEEP
AND
H.
V.
REGULATOR
0401-T402
MODULE
MAB
LOW-
VOLTAGE
RECTIFIERS
AUDIO
DRIVER
AUDIO
0
301
AUDIO
OUTPUT
0103
il
CH MODULE
MAC
CHROMA
ROMA
BANDPASS
REFERENCE
OSC
ACC
AFPC
1
MODULE
MAL
FIRST
VIDEO
AMP
SECOND
VIDEO
AMP
SYNC
SEPARATOR
VERTICAL
fie
VERTICAL
OUTPUT
Q101-0102
SIDE
PIN
CORRECTION
HORIZ
DEFLECTION
SCR
101-
SCR
102
FLYBACK
XFMR
KINE
SCREEN
SUPPLY
11*-
1-
220 (
VIDEO)
+160 (
HORIZ)
+77
(
VERT)
m- +
30 (
AUDIO)
a.. +
30 (
DIST)
B-
W
VIDEO
YOKE
CURRENT
PHUOLRSIEZ
CHROMA
MODULE
MAE
3
58
REF
ICHROMA
DEMODS
R-
Y
BY
G Y
MODULES
MAD
3
ARE
USED—
ONE
FOR
EACH
COLOR
COLOR
VIDEO
OUTPUT
AMPLIFIERS
CONVERGENCE
BOARD
RETRACE
H.V.
QUADRUPLER
PULSE
FOCUS
BLEEDER
CONVERGENCE
BOARD
PW
800
1
AGC
GATE
in.
BURST
GATE
HORIZ
AFC
PW
800
YOKE
CURRENT
SPEAKER
RED
VIDEO
BLUE
VIDEO
KINESCOPE
GREEN
VIDEO
I
CATHODES
CONVERGENCE
ASSEMBLY
YOKE
CURRENT
•
Ile.
VERT
YOKE
SIDE
PINCUSHION
AMP
HIGH
VOLTAGE
FOCUS
VOLTAGE
SCREEN
VOLTAGE
KINE
SCOPE
HORIZ
YOKE
Figure
1-1
Functional
Diagram
of
the
RCA CTC
49
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