RCAVICTOR CT-100 User manual

RCA
MODEL CT-IOO
Color TV
Receiver
Entire Contents Copyrighted
ENVELOPE AND CONTENTS PRINTED IN U.S.A.
published by HOWARD W. SAMS & CO., INC., Indianapolis s, Indiana
Scanned by mbear2k - Jan 2012

Pho to fa ct* Folder
*T*AOC MARK
RCA VICTOR
MODEL CT 100 (Ch. CTC2)
TRADE NAME RCA Victor Model CT-100 (Ch. CTC2)
MANUFACTURER RCA Victor Div., Radio Corp. of A erica, Ca den, N, J.
TYPE SET Television Receiver
TUBES Thirty-seven
POWER SUPPLY 110-120 Volts AC-60 Cycle RATING 4. 44 A p. @ 117 Volts AC
TUNING RANGE- Channels 2 thru 13 VHF, 14 thru 83 UHF, Video IF 45. 75MC, Sound IF 41. 25MC ( In te r c a r r ie r )
INDEX
Photograph (Cont)
Block Diagra ........................................................ Resistor Identification (R1-R179)
.....................
. 19, 26
Disasse bly Instructions ......................................
..................... 12 Resistor Identification (R187-R290)„
. 20, 25
Miscellaneous Adjust ents .................................... Trans., Inductor & Align ent Identification .. 37
Parts List and Discriptions ................................. . 27 thru 33 Resistance Measure ents ....................................
.. 12
Photographs Service Location Adjust ents ................................ .. 13, 14
Cabinet-Rear V iew ...................................... .
Sche atic (Tuner)...................................... ..........
34
Capacitor Identification (C6-C116) ............. ........... 21, 24 Sche atic (TV)
........... . ................ .... ......................
2
Capacitor Identification (C121-C202) ........... 22, 23 Tube Replace ent Chart (Botto View)
...............
13
Chassis-Top View ........................................ Tube Place ent Chart (Top View)
.........................
14
High Voltage Co part ent ......................... ..................... 10 Wavefor s
............................... .. ............................... , , 3
RF Tuner........................................................ .
2
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HOWARD W. SAMS & CO., INC. • Indianapolis 5, Indiana
“ The li ting of any available replacement part herein doe not con titute in any
ca e a recommendation, warranty or guaranty by Howard W. Sam & Co., Inc.,
a to the quality and uitability of uch replacement part. The number of the e
part have been compiled from information furni hed to Howard W. Sam & Co.,
Inc., by the manufacturer of the particular type of replacement part li ted."
“ Reproduction or u e, without expre permi ion, of editorial or pictorial con
tent, in any manner, i prohibited. No patent liability i a umed with re pect to
the u e of the information contained herein. Copyright 1954 by Howard W .
Sam & Co., Inc., Indianapoli 5, Indiana, U. S. of America. Copyright under In
ternational Copyright Union. All right re erved under Inter-American Copyright
Union (1910) by Howard W. Sam & Co., Inc." Printed in U. S. of America
DATE 9 -5 4 SET 252 FOLDER 11
DC
CONVER
GENCE
CONTROL
CONTROL
FOCUS
CONTROL
CONTROL TUNING SELECTOR
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\ PHOTOFACT STANDARD NOTATION SCHEMATIC
©Howard W. Sam & Co., Inc. 1954
PAGE 2
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1ST VIDEO AMP
W l ®6CL6
c
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3
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RCA VICTOR
MODEL CT lOO (Ch. CTC2)
Scanned by mbear2k - Jan 2012

ALL WAVEFORMS TAKEN WITH NTSC COLOR-BAR GENERATOR SET TO
PRODUCE FIVE SATURATED COLOR BARS — GREEN, YELLOW, RED, MAGENTA,
& B LU E ---- UNLESS OTHERWISE NOTED.
wi
W6— NOTE I
W2 W 3 -N O T E I W —NOTE I
W 7—NOTE I W8-NOTES I & 2 W 9—NOTE I
K H
J v
p-p
H K 5 5 M
7875^j
W 5 —NOTE 1
1
112V
P-P
WIO —NOTE I
W 11—NOTE I WI2 —NOTE I W I3 -N O TE I WI —NOTE I W15 ~ NOTE I
F
120V
P-P
7 8 7 5 ^
WI6— NOTE I
r
4V
P-P
30^,
_ L
WI7—NOTE I
~T
15V
P-P
30 \ /
WI8 — NOTE I
420V
P-P
7875 'X /
WI9 —NOTE I
39V
P-P
7875*'V
W 20
94 V
P-P
7875\
W 2 1
24 V
P-P
7875'V/
W 22
10V
p-p
W 23
■ M B H | m| |
IlT ' 7a75t^
W 2 —NOTE 3 W 25
7IV
P-P
W 26 - NOTE 3
M~~Tv SS B jiflG X
prp N _ prp ■ I H H I I p'p m m m m m ?<p
797VV ^ 7 873^ ■ « H « j ■ B H H C te ? '
W27 — NOTE 3
| 7875 'X,
W28 — NOTE 3 W29 —NOTES 3& W30-NOTES 3 1
9V
P-P
7875'^/
W3I W32 W33 O S 12V
,-p
W 3 W35
B B S K * K K B E
W36 W37 W38
,96V
P-P
7 8 7 5 ^
W 39
T
10V
P-P
I 7875l'\,
W 0
IBS:
W I BB,lv
P-P
7 8 7 5 \j
W 2
20V
P-P
7875*^
W 3 W
----- F
86V
P-P
7 8 7 5 ^
IV
P-P
3(KVy
W 5 —NOTE I
NOTE 1. TAKEN WITH BLACK AND WHITE TEST PATTERN.
NOTE 2. TAKEN WITH V18 REMOVED FROM SOCKET.
NOTE . TAKEN WITH LOW CAPACITY PROBE.
NOTE 4. TAKEN WITH GENERATOR SET TO PRODUCE VERTICAL "I" & "
SET 252 FOLDER 11 PAGE 3
RCA VICTOR
MODEL CT 100 (Ch. CTC2)
Scanned by mbear2k - Jan 2012

RF TUNER BOTTOM VIEW CAPACITOR IDENTIFICATION
PAGE 4
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ALIGNMENT INSTRUCTIONS
ALIGNMENT INSTRUCTIONS—READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
The high voltage should be disabled by removing the fuse (M5) in serie s with pin 7 of the deflection yoke socket.
SOUND IF ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM
Ground pin 2 (grid) of 6CL6 (V8).
DUMMY
ANTENNA
SIGNAL
GENERATOR
COUPLING
SIGNAL
GENERATOR
FREQUENCY CHANNEL CONNECT
VTVM ADJUST REMARKS
.01MFD High side to term inal
"C" of L 5. Low side
to chassis.
4.5MC
(Unmod) Any DC probe to point . Common to
chassis.
Al, A2,
A , A4 Adjust for maximum deflection. Attenuate generator
output for -12 volts on VTVM for final peaking of
Al thru A4.
DC probe to point
. Common to
chassis.
A5 Adjust for zero reading. A positive and negative
reading will be obtained on eith er side of the
correc t setting. Move VTVM to point and
retouch A4 for maximum deflection and then repeat
step 2.
DC probe to point
. Common to
chassis.
Connect a 1500ft resistor across term inals "B" and
"C" (primary) of L 6. Readjust A for maximum
deflection. Disconnect the 1500ft resistor and re 
connect it ac ro ss term in als "A" and "D" of L 6 and
adjust A2 for maximum deflection. Remove the 1500ft
resis to r and the jumper from pin 2 of V8 to ground.
SOUND IF ALIGNMENT USING FM SIGNAL GENERATOR AND OSCILLOSCOPE
Use frequency modulated signal with 60% modulation and 450KC sweep. Use 120% sawtooth voltage in scope for horizontal deflection.
Ground pin 2 (grid) 6CL6 (V8).
DUMMY
ANTENNA
SWEEP
GENERATOR
COUPLING
SWEEP
GENERATOR
FREQUENCY
MARKER
GENERATOR
FREQUENCY CHANNEL CONNECT
SCOPE ADJUST REMARKS
. 01MFD High side to term inal
"C" of L 5. Low side
to chassis.
4.5MC
(450KC Swp) 4.5MC Any Vert.A m p. to point
. Low side to
chassis.
Al, A2,
A , A4 Disconnect stabilizing capacitor C2 . Adjust
for curve of maximum amplitude and sym
m etry sim ilar to Fig. 1.
V ert. Amp. to point
<^> . Low side to
chassis.
A5 Reconnect stabilizing capacitor C2 . Adjust
so that 4.5MC occurs at center of cro ss
over lines as in Fig. 2. SLIGHTLY retouch
A4 for maximum amplitude and straightness
of crossover lines. Remove jumper from
pin 2 of V8 to ground. Continue alignment
with step 4.
VIDEO IF ALIGNMENT
If the scope to be used does not have a sensitivity of 1 m illivolt per inch a suitable pream plifier may be necessary. A VHF signal generator of cry stal
accuracy should be used to provide m arkers.
Beginning with step 7 the sweep or signal generators will be connected to the front term inal of the K E crystal m ixer. Since extrem ely short leads
must be employed in making these connections it is recommended that the KRK12C input head shown in Fig. 4 should be constructed and used in o rder to
obtain reliable response curves.
Three 7. 5 volt batteries capable of withstanding considerable current drain are required.
Connect two 7. 5 volt batteries in series with a 1000 potentiom eter across the 15 volt combination. Also, connect a 1000ft potentiometer across the third
7. 5 volt battery. Connect the positive side of the 7. 5 volt battery to chassis and the potentiometer arm to the ungrounded side of C55 and adjust for-6 volts
Connect the synchronized sweep voltage from the sweep generator to the horizontal input of the oscilloscope for horizontal deflection.
DUMMY
ANTENNA
SWEEP
GENERATOR
COUPLING
SWEEP
GENERATOR
FREQUENCY
MARKER
GENERATOR
FREQUENCY CHANNEL CONNECT
SCOPE ADJUST REMARKS
.01MFD High side to pin 2 (grid)
of 6CL6 (V8). Low
side to chassis.
Not used 47.25MC
(400%Mod) Any V ert. Amp. (thru
pre-am plifier if
necessary) to point
<0> . Low side to
chassis.
A6 Connect pin 8 (grid) of 6AN8 (V7) to chassis
using a sho rt jum per. Adjust A6 for
MINIMUM 400% indication on scope.
»""41.25MC " "A7 "
D irect High side to pin 2 (grid)
of 6CL6 (V8). Low
side to chassis. Use
very short leads.
44MC
(10MC Swp) 41.25MC
41.65MC
45.75MC
47.25MC
V ert. Amp. to point
<§> . Low side to
chassis.
A8,A9 Adjust sweep generator output for 6 volts
peak to peak on scope. Couple m arker
generator loosely to pin 2 of V8. Adjust
A8 and A9 for maximum gain with response
sim ila r to F ig. . While observing response
on scope, adjust the sound rejection control
(R22) for maximum rejection at 41,25MC.
Remove short from pin 8 of V7 to ch assis.
Fig. 4 Thru input head (Fig.4)
to front term inal of K E
crystal and chassis.
Not used 44.9MC
(Unmod) Any non-
interfer-
ing
channel
Use VTVM.
DC Drobe to point
<£> .C om m on to
point <§> •
M0 Connect the junction of R100 and R101 to
chassis with short jumper. A djust for
maximum deflection. Attenuate generator
output to maintain -6 volts on VTVM.
"""42.1MC "AH "
41. MC A12 Adjust for maximum deflection.A ttenuate
generator output for -6 volts on VTVM.
Remove te st equipment and 7.5 volt bias
supply.
4 MC
(20MC Swp) 41.25MC
45.75MC Vert. Amp. thru
detector (detector
lead ofFig.5 ) to
point <£> . Low side
to tuner chassis.
A1 , A14 Connect a 56ft carbon resisto r between
term inals "C" and "D" of L15 (on timer)
Couple m arker generator loosely to pin
(grid) of 6U8 (V ). Attenuate sweep genera
tor output for . volts peak to peak on scope.
Adjust A1 and A14 for maximum gain with
response sim ilar to Fig. 6. Remove 56ft
resisto r from L15.
Not used 41.25MC
(400%Mod) V ert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of 6CB6
(V4). Low side to
ch assis (Use scope
pre-am p. if neces
sary ).
A15 Connect the load leads of IF te st block
(Fig. 5) to pin 5 (plate) of V5 (6CB6) and
V6 (6CB6). Connect the ungrounded side
of C55 to chassis. Adjust A15 for
MINIMUM 400% indication on scope. Remove
jumper from ungrounded side of C55 to
chassis.
SET 252 FOLDER 11
PAGE 5
RCA VICTOR
MODEL CTlOO (Ch. CTC2)
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ALIGNMENT INSTI
DUMMY
ANTENNA
Fig. 4
Fig.9 &
Fig. 4
Fig. 4
Fig. 4
SWEEP
GENERATOR
COUPLING
Thru input head (Fig. 4)
to front term inal of
K E crystal and chassis
Signal generator in
series with sound
attenuator pad thru
input head (Fig.4) to
front term inal of K E
crystal and chassis.
Thru input head (Fig.4)
to front term inal of
K E crystal and
chassis.
Thru input head (Fig. 4)
to front terminal of
K E crystal and
chassis.
SWEEP
GENERATOR
FREQUENCY
44MC
(10MC Swp)
44MC
(10MC Swp)
MARKER
GENERATOR
FREQUENCY
41.25MC
41.65MC
45.75MC
40.7MC
(400'UMbd)
47.25MC
(40(KMod)
40.7MC
41.65MC
45.75MC
47.25MC
4 .0MC
(40(KMod)
41.25MC
(40(KMod)
4 .0MC
(400%Mod)
Any non-
interfer-
ing
channel
Any non-
interfer
ing
channel
CONNECT
SCOPE
Vert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of
6CB6 (V4). Low
side to chassis.(Do
not use scope pre
amp.)
Vert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of
6CB6 (V5). Low sid<
chassis. (Use pre
amp. if necessary)
Vert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of
6CB6 (V5). Low
side to chassis.
(Do not use pre
amp.)
Vert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of
6CB6 (V5). Low
side to chassis.
(Use pre-am p. if
necessary).
Vert. Amp. thru
detector (detector
lead of Fig. 5) to
pin 5 (plate) of
6CB6 (V5). Low
side to chassis.
(Use pre-amp. if
necessary)
A16,A17
A20, A21
Couple marker generator loosely to pin 1
(grid) of 6CB6 (V4). Connect the load
leads of IF test block (Fig. 5) to pin 5 (plate)
of V5 (6CB6) and V6 (6CB6). Attenuate
generator output for . volt peak to peak
on scope. Adjust A16 and A17 for maximum
gain with response sim ilar to Fig. 7.
While observing response on scope, adjust
the sound level control (R15) for maximum
rejection at 41.25MC.
Connect the load leads of the IF test block
(Fig. 5) to pin 5 (plate) of 6CB6 (V6) and
pin 6 (plate) of 6AN8 (V7). Connect the
ungrounded side of C55 to chassis.
Adjust for MINIMUM 40(K response on scope.
Adjust for MINIMUM 40(K response on
scope. Remove jumper from ungrounded
side of C55 to chassis.
Connect the potentiometer arm of the 15
volt bias supply to the ungrounded side
of C55.Connect the positive side of chassis.
Adjust the potentiometer arm for -6 volts
at C55. Connect a jumper from the junction
of R100andR101 to chassis. Couple the
signal generator loosely to pin 1 (grid) of
6CB6 (V4). Adjust for response sim ilar to
Fig. 8.
Note and mark output level of response on
scope. This output level is to be used as
reference in step 18.
Readjust A15 for MINIMUM response.
Turn sound level control (R15) counter
clockwise (from position set in step 12)
until output level indication on scope is
same as obtained in step 16. Remove IF
test block (Fig. 5) and scope.
OVERALL VIDEO IF RESPONSE CHECK
Connect the potentiometer arm of the 15 volt bias supply to the ungrounded side of C55. Connect the positive side to chassis. Adjust for -9 volts at C55.
Couple the marker generator loosely to the grid of the first video IF amplifier tube (V4).
Connect the synchronized sweep voltage from the sweep generator to the horizontal input of the oscilloscope for horizontal deflection.
DUMMY
ANTENNA SWEEP
GENERATOR
COUPLING
SWEEP
GENERATOR
FREQUENCY
MARKER
GENERATOR
FREQUENCY CHANNEL CONNECT
SCOPE ADJUST REMARKS
Fig. 4. Thru input head (Fig.
4) to front terminal
of K E crystal and
chassis.
4 MC
(10MC Swp) 41.25MC 41.65MC
45.0MC
45.75MC
46.5MC
Any non-
interfer
ing
channel
Vert. Amp. to
point <§> . Com
mon to chassis.
Attenuate sweep generator output
for 6 volt peak to peak on scope. Check
for response curve sim ilar to Fig. 10.
If necessary, retouch A10, All and A12
to obtain desired response. Exercise care
to obtain m arker response exactly as
shown in Fig. 10.
KRK12C VHF TUNER ALIGNMENT
In step 20 choose the proper pad ( see Fig. 11) to match the output impedance of the sweep generator to be used. If the sweep generator does not have
built in markers couple a VHF signal generator loosely to antenna term inals to provide markers.
Connect the negative lead of the 7. 5 volt bias supply to the tuner AGC terminal. Connect the positive side to chassis. Adjust the potentiometer arm for
- 2 volts at tuner AGC terminal.
To minimize RF-IF interaction remove the RF oscillator tube (V2/6AF4) from its socket.
Tuner alignment as outlined below requires the use of a heterodyne frequency meter.
Connect the synchronized sweep voltage from the sweep generator to the horizontal input of the oscilloscope for horizontal deflection.
The sweep generator output lead should be terminated with its characteristic impedance, usually 50 ohms.
DUMMY
ANTENNA SWEEP
GENERATOR
COUPLING
SWEEP
GENERATOR
FREQUENCY
MARKER
GENERATOR
FREQUENCY CHANNEL CONNECT
SCOPE ADJUST REMARKS
Fig. 11 Thru attenuator pad (Fig.
11) to VHF ahtenna 57MC
(20MC Swp) 55.25MC
59.75MC 2Vert. Amp. to point
<0> . Low side to A22 A2 Adjust for symmetrical response with
maximum gain of center of band pass as
term inals. 6 MC
(20MC Swp) 61.25MC
65.75MC chassis. (Use pre amp. if necessary) A24
A25 in Fig. 12. The curves will have a deep
valley due to crystal loading and nonlinear
69MC
(20MC Swp) 67.25MC
71.75MC 4(See
Remarks) detector characteristics). Do not exeeed
lim its shown in Figs. 12A and 12C. Each
79MC
(20MC Swp) 77.25MC
81.75MC 5channel strip adjustment for an individual
channel strip has a corresponding adjust -
85MC
(20MC Swp) 8 .25MC
87.75MC 6ment on all other channel strips. Since these
adjustments are identical in position and
function they are indicated by the same "A"
number in the interests of simplification.
177MC
(20MC Swp) 175.25MC
179.75MC 7
18 MC
(20MC Swp) 181.25MC
185.75MC 8Adjustments A22, A2 and A24 are access
ible thru holes in the top of the tuner as
189MC
(20MC Swp) 187.25MC
191.75MC Vthe channel switch is turned to each channel.
Adjustment A25 refers to coupling capacitor
195MC
(20MC Swp) 19 .25MC
197.75MC 10 whose positioning affects bandwidth of re
sponse curve.
201MC
(20MC Swp) 199.25MC
20 .75MC 11 NOTE: The valley in the response curve
(Fig.l2B) may vary from 0-50% (lower
dashed curve). If the valley rises above
50% (upper dashed curve) this is an in
207MC
(20MC Swp) 205.25MC
209.75MC 12
21 MC
(20MC Swp) 211.25MC
215.75MC 1 dication of excessive sweep generator out
put and the sweep generator output should
be attenuated. Oscillator injection voltage
is adjusted on UHF channel inserts only.
Remove test equipment and replace the
oscillator tube (V2) in its socket.
4 .5
FIG.
fig.;
FIG
PAGE 6
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