RCA 21 s 348 schematic
PHOTO
TRADE
NAME
RCA
MANUFACTURER
TYPE
SET
TUBES
POWER
SUPPLY
TUNING
RANGE
Alignment
Disassembly
Horizontal Sweep
Parts
Photographs
"The
case a recommendation,
os
to the
parts
Inc.,
"Reproduction
Instructions
Instructions
List
and
Cabinet-Rear
Capacitor Identification
Chassis-Top
RF
Tuner
14, 21
Resistor
Identification
listing
of
any
available
quality
and
hove
by the
suitability
been
compiled from information furnished
manufacturers
or
use, without
FACT*
VOLUME
Folder
CONTRAST
CONTROL CONTROL
ON-OFF
SWITCH
RCA
Victor
MODELS
21-S-362M,
21-S-362MU,
21-S-354
21-S-353, 21-S-355
21-S-353G, 21-S-354G, 21-S-355G,
21-S-357G, 21-S-359G, 21-S-362G
21-S-367G,
21-S-353U, 21-S-354U, 21-S-355U
21-S-353GU,
21-S-357GU,
21-S-367GU,
21-S-348, 21-S-348G
21-S-348G
21-S-348GU
RCA
Television
Twenty-two
110-120
-
Circuit
Descriptions
View
View
HOWARD
replacement
warranty
of
of the
express
Channels 2 thru
5
22
Adjustments
15
13
4, 9
3
23, 24
W.
part herein
or
guaranty
such
particular
by
replacement
type
permission,
VICTOR
21-S-367
21-S-367U
KCS83C
21-S-369G
21-S-354GU, 21-S-355GU,
21-S-359GU, 21-S-362GU,
21-S-369GU
KCS83PL
...
Victor
Div.,
Receiver
Volts
AC-60 Cycle
13
SAMS & CO., INC. • Indianapolis
does
not
Howard
W.
Sams & Co.,
part.
The
numbers
to
Howard
of
replacement part
of
editorial
MODEL
21-S-354
KCS83
KCS83A
KCS83C
KCS83PK
KCS83D
KCS83PJ
Radio Corp,
13
VHF,
14
KCS83C
.......
..........
of
America,
•
thru
83
UHF, Video
RATING
INDEX
thru
thru
19
constitute
W.
Sams & Co.,
or
pictorial
8
in any
of
listed."
Photographs (Cont)
Resistance
Servicing
Schematic (Alternate
Schematic (TV)
Trouble Shooting Aids
Tube
Tube
Tube
tent,
Inc.,
these
con-
the
Sams & Co.,
ternational
Union U 910)
DATE
Trans.,
Failure
Placement
Placement
in
any
use of the
6-54
CHANNEL
SELECTOR
CHASSIS
.. , KRK29
.KRK29A/27
..............
........
or
KCS83D
KRK29A/27
or
KCS83PM
Camden,
1.9
IF
45.75MC,
Inductor & Alignment Identification
Measurements
in the
Field
2
Check
Chart (Bottom
Chart (Top
manner,
is
prohibited.
information contained
Inc.,
Indianapolis
Copyright Union.
by
Howard
.....
KCS83PC - "G",
KRK22C
KCS83PD - "GU"...
.KRK29
KRK22C
KRK29A/27
N.J.
Amp.
® 117
Sound
11
22
Tuners).......................
.............................
Chart
.............................
View)
View)
5,
Indiana
No
patent
5,
Indiana,
All
rights
W.
Sams & Co.,
FINE
TUNING
TUNER
...
KRK29B
KRK29
KRK29
KRK29A/27
Volts
AC
IF
41.25MC
(Intercarrier)
......
11
10
liability
is
he-rein.
U. S. of
reserved
Inc."
assumed
Copyright 1954
America. Copyright
under
Inter-American
Printed
in U. S. of
with
by
Howard
SET
19
20,25
12, 21
10
respect
to
W.
under
In-
Copyright
America
242
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8
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MKASURED
KttOl
CHANNEL
SELECTOR
SWITCH
SHOWN
IN
CHAHN
SW
ON
VOLUME
CONTROL
^Sc
BLJbRIO
N
WITH
CONTROLS
A
PHOTOFACT
STANDARD
©Howard
W.
§
RED-GR«
NOTATION
Som! & Co., Inc.
RED
280VAC
4-
SCHEMATIC
1954
LV
RECT
»)5U4G
PAGE
2
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,™, A Hi
RCA
VICTOR MODELS
GU, U,
21-S-355,
GU, M, MU,
21-S-348,
G, GU, U,
21-S-367,
21-S-357G,
G, GU, U,
G, GU,
21-S-369G,
21-S-353,
GU,
21-S-359G,
G, GU, U,
GU
(Ch.
21-S-354,
GU,
21-S-362G,
KCS83 Series)
G,
G,
-S-362G,
21
21-S-354,
GU,
KCS83 Series)
(Ch.
G, GU, U,
-S-359G,
GU
1
GU, 2
21-S-353,
GU,
G,
21-5-348,
VICTOR MODELS
RCA
SISSVHD
1-S-369G,
dOl
21-S-357G,
G, GU, U, 2
M3IA
GU, U,
G,
21-S-367,
-S-355,
M, MU,
U, 2 1
GU,
GU,
O
u
UJ
o
00
tr
<
X
tn
U
z
LU
Q
oe,
O
^
u
u
~
G,
Series)
21-S-362G,
21-S-354,
GU,
KCS83
(Ch.
G, GU, U,
GU
21-S-359G,
C»U,
21-5-353,
21-S-369G,
G, GU,
21-S-357G,
G, GU, U,
21-S-348,
GU, U,
G,
21-S-367,
21-S-355,
VICTOR MODELS
GU, M, MU,
GU, U,
RCA
The
high voltage shock
The
antenna matching unit
In
place.
If
a new
antenna unit
facilities.
The FM
trap,
to
the
channel
(grid)
of
6CF6
The
matching unit
capable
oLwithstanding
to
point
U^
Connect
The
DUMMY
ANTENNA
Two
Carbon
Resistors
The
new
trap
jumper
the
Connect
terminal
outlined
Connect
The
Leave
three printed
Connect
DUMMY
ANTENNA
Direct
. Set the
the
synchronized sweep voltage
sweep generator output lead should
130 n
Across
minals
lead.
antenna matching
antenna
unit
(A49)
may be
to
connect
first video
the
ends
to
chassis
under
the
synchronized sweep
sweep generator
bias
connected
the
synchronized sweep voltage
High
to
terminal * B".
"
hazard
is
installed,
L7,
may be
selector
switch.
(V4).
Remove 6CF6 (V3)
cover
must
considerable
potentiometer
SWEEP
GENERATOR
COUPLING
antenna ter-
with
130J2
unit
is
installed,
aligned
point
Vvon
IF
amplifier
of a
lOOOfi
and
connect
steps
1,
2 and 3 for
output
as
under " antenna matching
circuit
type video
SWEEP
GENERATOR
COUPLING
side
to
terminal
'A"
of
L27.
Low
"
has
aligned
in
has
without
(6CF6)
potentiometer
"
.
0015MFD
High
side
to
Ceramic
Capacitor
Low
is. Use
leads.
side
point
to
tuner
very short
ALIGNMENT
may be
eliminated
KRK29
been properly aligned
the RF
unit should
without
Use a
be in
adversely
short jumper
from
place
during
current
arm to
from
be
terminated with
SWEEP
GENERATOR
FREQUENCY
its
drain.
obtain
each
50MC
(20MC
Swp)
KRK22C
been properly aligned
the RF
unit
should
adversely
*-ne
the
voltage
lead should
IF
side
<^N
.
cHass-
affecting
matching
unit
from
its
socket.
across
potentiometer
"KRK29
or
£rom
be
terminated
VIDEO
transformers. Location
from
SWEEP
GENERATOR
FREQUENCY
Not
used
44MC
(10MC
Swp)
ALIGNMENT
INSTRUCTIONS-READ
by
removing
KRK29A
factory.
realigned.
the
connect point
N/
Connect
the
volts
at
point
its
characteristic
MARKER
Mod)
MATCHING
at the
factory.
Alignment
the
unit.
Disconnect
a .
001MFD
matching
volt
battery
point^N.
antenna
matching
with
its
characteristic
alignment
of
these transformers
generator
MARKER
SMC
SMC
SMC
SMC
the
ANTENNA
alignment
positive
to
CHANNEL
Any
unit
to the
(MODELS
".
CHANNEL
4
OR
at the
be
affecting
to
socket.
alignment.
Connect
-5
the
sweep generator
GENERATOR
FREQUENCY
45.75MC
(400tiMod)
41.25MC
(4001,
50MC
52MC
53MC
ANTENNA
be
realigned.
through
The
a 7. 5
arm to
KRK29A
the
sweep generator
IF
ALIGNMENT
unit
the
sweep
GENERATOR
FREQUENCY
44.
45.
43.0MC
47. 2 SMC
42.
45.75MC
47.25MC
42 . SMC
45.0MC
45.75MC
46.
INSTRUCTIONS
CAREFULLY
horizontal
The RF
Alignment should
^A\n the
the
U^.
ule
The RF
capacitor
cover must
capable
Set the
Turn
to the
Any
not
used
locally
"
BEFORE
oscillator
is
tube (V16)
UNIT
aligned
MATCHING
unit
not be
of the
unit. Disconnect
matching unit thru a .001MFD
ends
of a
lOOOSi
terminal
horizontal
impedance,
Vert.
<B> . Low
Vert. Amp. thru
detector
pointOv> . Low
to
chassis.
UNIT
unit
should
the
to Pin 1
of
potentiometer
unit
alignment.
horizontal
impedance, usually
21-S-354 & 21-S-362,
AGC
horizontal
Use
probe
Common
Verta
detector
pin 5
(V3) . Low
chassis.
Veri.
Miy
chassis.
potentiometer
to
chassis
input
of the
usually
CONNECT
SCOPE
Amp.
to
side
(Fig.l)
ALIGNMENT
is
aligned
be
attempted
lead
from
pointO^to
(grid)
be in
place during alignment.
withstanding considerable current
input
of the
control
fully
and
their A numbers
input
of the
CONNECT
SCOPE
VTVM.
DC-
to
point
to
chassis.
"
"
"
Amp. thru
(Fig.l)
(plate)
of
side
Amp.
to
• Low
side
ATTEMPTING
ALIGNMENT
from
its
socket.
ALIGNMENT
with a particular
attempted without
and
connect
oscilloscope
50
point
to
to
side
(CH.KCS83PK
with a particular antenna matching
wtthout
of
tne
arm for -5
oscilloscope
50
MODELS
clockwise Models
oscilloscope
antenna matching unit
the
proper
the
lead
from
the FM
capacitor
across a 7.5
the
potentiometer
for
ohms.
ADJUST
A3,A4
horizontal deflection.
Set
scope
Adjust
for
scope.
Remove
structions
connect a 300O, 2 watt carbon
point^^to
Adjustuj
Fig.
2.
Repeat
further
improvement is noted.
300(2
resistor
connection between
switch.
& KCS
the
proper alignment facilities.
the
channel
video
IF
volts
at
polnt^N.
for
horizontal
21-S-348THRU
21-S-348
is
shown
in
for
horizontal
selector
amplifier
drain.
Fig.
second
ohms.
alignment
trap
to pin 1
volt
battery
gain
MINIMUM
the
.001MFD
above)
chassis
obtain
and
Replace
83PL)
switch.
Connect
21-S-369)
through 21-S-369 incorporate
6.
ADJUST
A5
Attenuate
Oj>
.
volts
at
deflection.
generator
VTVM. Adjust
A6
A7
'A8
Adjust
for
MINIMUM
sufficient
generator output
volts
at
VTVM.
A10,
All
Connect
33012
to
6CF6
to
point
to
A9
screen
MINIMUM
carbon
Set AGC
a
second
detector
Attenuate
peak
A10
marker
marker
in
Fig.
connect
Adjust
to
peak
ator
A6
and A7 to
to
Fig,
resistors
of V4 and V5.
capacity. Connect
resistor
control
signal
(Fig.
sweep output
to
peak
for
and All for
at
75%. Adjust
at 70% on
3,
Remove detector probe
the
180n
sweep
generator
on
scope.
loosely
to pin 1
obtain
4.
Continue
(L7)
arm
REMARKS
for
maximum.
from
response
steps
detector
V3 in its
unit
(6CF6).
Follow
4000,
response
capacitor
pointO^and
using
very
curve
1, 2 and 3
probe. Restore
L7 and the
socket.
in
place.
The FM
Use a
Remove
the
positive
the
procedure
Turn AGC.
(see
resistor
short
similar
until
Remove
channel
If a
short
deflection.
deflection.
REMARKS
output
to
maintain
for
maximum
M
,-
deflection.
Preset
from
plate
fully
clockwise.
generator
1) to
furnish
final adjustments. Adjust
maximum
response
and the two
Couple
(grid)
response
alignment
from
loosely
to
maintain
gain
A9 to
output
the
of
Use
to
produce
plate
A9 to
180(1
to
screen
Couple
to
markers.
with
place
curve
and
330Ji
resistors
for 3
marker
V30
Retouch
curve
with
to
0.3
45n75MC
42.5MC
as
step
on
in-
from
leads,,
to
no
the
-3
-3
of V3.
volt
shown
dis-
volts
gener-
similar
14.
=
peak
A5,
Channel
No
Frequency
1
1
1
}
18
20
22
54-60
60-66
66-73
76-83
B2-8B
174-180
8086929804107076-
88-
940006-
\l:
Video
55.25
61.
67.25
77.25
83.25
175.25
86
181.25
92
187.25
98
193.25
04
199.
10
205.25
16
211.25
76
471.25
82
477.25
94
4 89!
00
495.
12
507^25
24
5J3.
Sound
59.75
25
65.75
71 75
81
87
179
1B5
191
197
25
203
209
215
75
81
25
93
25
9S
11
25
523
TELEVISION CHANNEL FREQUENCIES
Channel
Frequency
Video
771.25
777.25
783.25
789.
795.25
801.25
807.25
813.25
819.25
825.25
831.25
837
843.25
849.25
86L25
867.
879^5
Sound
775.75
781.75
787.75
25
793.
799.75
805.
811.
817.
823.
829
835.
25
841
847.
853.
B6s'
25
871.
Bw'lS
889.75
75
5
5
5
5
5
5
5
5
s
s
5
75
PAGE
5
Channel
Frequency
Video
651.25
657.25
663.25
669.25
675.25
681.25
687.25
693.25
699.25
705.25
711.25
717.25
7Z3.
729.25
74U25
747.25
759J25
8
Sound
655.75
661.75
667.75
673.75
679.75
685.75
691.75
697.75
703.75
709.75
715.75
721.75
25
727.75
733.75
74s!75
751.75
763^75
64
770-776
65
776-782
66
782-788
67
788-7B4
6B
794-800
69
800-806
70
806-812
71
812-818
72
81B-824
73
824-830
74
830-836
75
836-842
76
842-848
77
848-354
79
860-866
80
866-972
82
878-884
Channel
Frequency
Video
Sound
44
23
524-530
525.25
24
530-536
5
536-542
75
6
542-548
75
7
548-554
75
8
554-560
75
9
560-566
75
0
566-572
75
1
572-578
75
2
578-584
3
584-590
75
75
4
590-596
75
5
596-602
75
6
602-608
8
614-620
75
75
9
620-626
1
632-638
75
75
3
644-650
531 25
537
543
549
555
561
567
573
579
585
591
597
603
615
621
633
645
529.75
535.75
25
541
25 547
25
553
25
559
25
565
25
571
25 577
25
583
25
598
25
595
25
601
25
607
25
619
25
625
25
637
25
649
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
SET
242
650-656
45
656-662
46
662-668
47
,,68-674
48
674-680
49
680-6B6
50
686-692
51
692-698
52
698-704
53
704-710
54
710-716
55
716-722
56
722-728
57
72B-734
59
740-746
60
746-752
62
758-764
FOLDER
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