Motorola VT71 User manual

PHOTOFACT* Folder
MOTOROLA
MODEL VT71
VOL.CONT.
ON-OFF SWITCH
FINE TUNING
CHANNEL
SELECTOR
CONTRAST
CONT.
MOTOROLA MODEL VT71
TRADE NAME Motorola, Model VT71
MANUFACTURER Motorola, Inc.,4545 Augusta Blvd., Chicago, 111.
TYPE SET TelevisionReceiver
TUBES Sixteen
POWER SUPPLY 115 Volts, 60 Cycle AC RATING 115 Volts •
TUNING RANGE- Channels 2 through 13
.96 Amps.
TABLE OF CONTENTS
Schematic
Chassis Top View
Parts List and Description
Alignment Instructions
ChassisBottom View-Trans.,Inductor &
Alignment Identification
Block Diagram
Voltage and ResistanceMeasurements
Page Page
2 ChassisBottomView-Resistor Identification 12,17
3 ChassisBottom View-Capacitor Identification 13,16
5,8,11 TubePlacementChart
6,7 schematic-Deflection Circuits
DisassemblyInstructions
4,9
10
14
Positioning of FeedbackSpring on H;V. Rect.
Cabinet RearView
15
18
19
19
19
II
0 H
HOWARD W. SAMS & CO.,INC. • Indianapolis 7, Indiana
"Thelisting ofany available replacement part hereindoes not constitute inany
case a recommendation,warranty or guaranty by Howard W. Sams & Co., Inc.,
as tothe quality and suitability of such replacement part. The numbers of these
partshavebeen compiled from information furnished to Howard W. Sams & Co.,
Inc., by the manufacturers of the particulartype of replacement part listed."
"Reproduction or use,without express permission, of editorial or pictorial con-
tent, inany manner, is prohibited. No patent liability is assumedwithrespect to
the useofthe informationcontainedherein.Copyright 1949 by Howard W.
Sams & Co.,Inc., Indianapolis 7, Indiana, U. S.of America.Copyrightunder In-
ternationalCopyright Union. All rights reservedunder Inter-American Copyright
Union (1 910) by Howard W. Sams & Co.,Inc."Printed inU.S.of America
DATE 2/49-#493-16 SET #55-FOLDER #16

jtfj jlfj Jffl Jlf
CHANNELS
(CHASSIS TS-4F & LATER) 28.3 4567 B&9 I
(CHASSIS TS-4E A EARLIER) | 2 38.4 5 S.6 7 8&9
/SS\K
C79.-~.iboo- CM
ra.
/TTWfi) i
A PHOTOFACTSTANDARD NOTATION SCHEMATIC
© Howard W. Sams & Co.,Inc. 1949
PAGE 2

MOTOROLA
MODEL
VT71
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PAGE 4

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CHASSIS
BOTTOM
VIEW-TRANS.,
INDUCTOR
AND
ALIGNMENTIDENTIFICATION
LZ1A
13QOW
vioaoiow

MODEL
VT71
TUBES
PARTS
LIST
AND
DESCRIPTIONS
CONTROLS
ITEM
No.
VI V2A
B
V3 V4 V5 V6 V7 V8 V9
V10
Vll
¥12
V13
VI
4
V15
V16
USE
RF
Amp.
Converter Converter
1stIF
Amp.
2nd
IF
'Amp.
3rdIF
Amp.
Video
ABD.
Limiter
Ratio
Detector
Audio
Amp.
-Vert
Osc.
Power
Oit
put
Clipper
AFC,
Hor.Osc.
Vert.
Output
H.
V.
Osc.
H.V.
Rect.
Picture
Tube
REPLACEMENT
DATA
MOTOROLA
PART
No.
6AG5
12AT7
7F8
6AG5 6AG5 6AG5
6AU6 6AU6 6AL5
12SN7GT 25L6GT 12SN7GT
12SN7GT 6SL7GT 25L6GT 1B3GT 7JP4
STANDARD
REPLACEMENT
6AG5 12AT7
7F8
6AG5 6AG5
6AG5
6AU6 6AU6 6AL5
12SN7GT
25L6GT
12SN7GT
12SN7GT 6SL7GT
25L6GT
1B3GT 7JP4
RMA
BASE TYPE
7BD 9A
8BW
7BD
7BD
7BD 7BK
7BK
6BT 8BD 7AC 8BD
8BD
8BD
7AC
14G
NOTES
Used
in
some
models.
Chassis
TS-4B,
C,
D use
63^7
forAF
Amp.
LJ
CAPACITORS
Capacity
valuesgiven
inthe
rating
column
arein
mfd.
for
Electrolytic
and
Paper
Capacitors,
andin
mmfd.
for
Mica
and
Ceramic
Capacitors.
No.
R1A
B
C
R2A
B
R3
R4 R5
R6
R7A
B
R8
R9A
B
R10A
B
RATING
RESIST-
ANCE
1-
Meg
.
Shaft Switch
2
Meg.
Shaft 2.5Meg ^
Meg.
2
Meg.
20KS2
5
Meg.
Shaft
20KS2
5
Meg.
Shaft 1
Meg.
Shaft
WATTS
£
i
^ ^
2
TS
i
4 £
REPLACEMENT
DATA
11U
JUKULA
PART
No.
18A90142 18
A9
01
74
18A90148 18A484192 18A478285 18A90144 18A90145
18A90144
18A90145 18A90147
IRC
PART
No.
D13-137
E
41
Dll-141
P
Dll-141
P
Dll-137
P
Note
1-Thls
control
is
20002
in
chassis
1
CLAROSTAT
PART
No.
AM-63-Z
KSS-3
SW-A
AM-83-S
KSS-3
M-83-S
M-61-S
Not
Req.
o
INSTALLATION
NOTES
^f
Volume Attach
toR1Aper
instructions
ii
n
ii
ii
ti
Contrast-See
Note
1
Attach
to
R2A
per
instructions-See
Note
1
Focus Horiz.
Centering-Tapped
@
4GOK2&1
Meg.-
See
Note
2
Vertical
Centering
Horizontal
Size
Vertical
Size
Attach
to
R7A
per
instructions
Horizontal
Hold
Vertical
Hold-See
Note
3
Attach
toR9Aper
instructions
Brightness
Attach
to
R10A
per
instructions
S-4J.
Note
2-Thiscontrol
in
chassis
Models
TS-4B
& C hasa 1
Meg.
tap
only.
Note
3-T'nis
control
in
chassis
Models
TS-4B
& C
is
a 1
Meg.
control.
RESISTORS
ITEM
No.
Cl
Ci^A
B
C3A
B C
C4
C5
C6
C7 C8 C9
CIO
Cll
CIS
CIS C14
CIS
C16
C17
CIS
019
C20
021 022 C23 C24
025 026
C27
C28 C29
030
C31 032 C33
C34
C35 CSS
C37
RATING
CAP.
140
120 20
100 60
20
10
100
30
20 100
1000
1000
2 20
Z
1000 15 6
1000 1000
.25
5000 5000 5000
1000
1000
10CO 1000
1000
5000
5000
.05 .1
5000 5000 70
250 5000 70
VOLT
150
300
300 300
150
25 cO
200
600
100
250
REPLACEMENT
DATA
M°,Wo.
23B90135 23B90134
23B90136
23A90205
21R6631 21K470329
21K470322
21B77286 21K478410
21K478410
21K478280 21K478287
21K478280
21K478410 21K470323 21K470324
21K476410
21K478410
8A471356 21A470789 21A47078S 21A470789
21K478410
21K478410 21K478410
21K478410 21K478410 21A470789
21A470789
8A471151 8A471366
SLA470789
21A470789 21K470328 21R6648
S1A470788 21K470328
AEROVOX
PART
No.
AF888D«
rAF4444J«
-PRS450/40
PRS50-10 1467-005 1467-005 1467-005
1468-001 1468-001
1468-001
1468-001 1468-001
1467-005
1467-005 684-05 484-.
1
1467-005
1467-005 1468-00025 1467-005
CORNELL-
DUBILIER
PART
No.
BR105
1D5D5
1D5D5
1D5D5 1W5D1 1W5D1
1W5D1
1W5D1
1W5D1
1D5D5
1D5D5 DT6S5 DT4P1 1D5D5 1D5D5
5W5T25
1D5D5
SOLAR
PART
No.
M-10-50
MW.5-25 MW.5-25
MW.5-25
MW.5-21 MW.5-21
MW.5-21 MW.5-21
MW.5-21
MW.5-25 I1W.5-25 ST-6-05
ST-2-1
MW.5-25 MW.5-25 MO.
5
-325
t-M.5-25
SPRAGUE
PART
No.
TVL-44
TVL-46
TVL-51
TA-510 1FM-25 1FI1-25 1FM-25 1FM-21' 1FM-21
1FM-21
1FM-21
1FM-21 1FM-25 1FI1-25
TM-15
TM-1 1FM-25
1FM-25
1FM-325
1FM-25
IDENTIFICATION
CODES
AND
INSTALLATION
NOTES
Doubling
Cap.
-Note
1
-
Filter
A
"
A
"
a
"
A
Output
Cathode
Bvpass
Stabilizing
Cap.
"
Ext.
Ground
Isolation
Antenna
Coupling-
Cer.
Fixed
Trimmer
"
RF
Coupling
"
RF
Cath
.
Bypass
"
See
Note
2
RF
ScreenBypass
"
See
Note
2
Osc.
Coupling
"
Osc.
GridCap.
"
Osc/
Feedback
"
RF
Bypass-See
Note
3
"
RF
Decoupling
"
RF
Coupling
"
Conv
.
Cath
.
Bypass
"
See
Note
3
Bias
Filter-Note
3
"
ii
n
1stIF
Cath.
Byp.
"
1stIF
ScreenByp.
"
Bias
Filter
"
IF
Coupling
"
2nd
IFS
creenByp.
"
See
Note
3
IF
Coupling
"
RF
Filter-Note
3
"
""
-Note
4
"
3rdIF
Cath.
Byp.
See
.Note
5
3rd
IF
ScreenByp.
"
See
Note
5
3rdIF
ScreenByp.
See
Note
6
Video
Coupling
See
Note
7
RF
Bypass-Note
8
"
""
"
Fixed
Trimmer-Note
9
"
Sound
Coupling-Note
10
Video
Amp.
Screen
"
Note
11
Fixed
Trimmer-Note
12
"
ITEM
No.
Rll R12 R13
R14
R15 R16
R17
R18
R19 R20 R21 R22 R23 R24 R25
R26
R27
R28
R29 R30 R31
R32
R33
R34 R35
R36
R37 R38
R39 R40
R41 R42 R43
R44 R45 R46 R47
R48
R49
R50
R51 R52
R53
R54 R55
R56
R57
R58 R59
R60
R61
RATING
RESISTANCE
47QK8
15K2 682
10002 10002 100
OS
33KS! 27002 10
Meg.
10K2 10002 47009
2.2
Meg.
332
47002 4.7
Meg.
4.7
Meg.
33ffl
47002
10002 10002 682
10002
33K2
1
Meg.
332
68002
47002
470K2 822 10002 1802
33K2
68002 68002 4.7
Meg.
220K2 220K2
470K2 3302
100K2
lOKSi 1
Meg.
68
DOS!
15KS!
15KH 10K2
47002 220KS ssooa 47KS2
WATTS
i
i i X
I
•S
t 5
^
?
X T
2 £
i
|
1
a
JF
£ £
2
~s
i
•s •£ I
B
"2
"E
X
1 | s TL
1
2
2 1 i 2 ± Jp
REPLACEMENT
DATA
MOTOROLA
PART
No.
6R6377
6R6477 6R2039 6R6229 6R6228
6R6229
6R6410
6R5577 6R5622
6R6320
6R6229
.
6R6080 6R6433
6R2036
6R60SO 6R6446
6R6446
6R2036 6R6080
6R6229 6R6229
6R2039
6R6229
6R6410 6R6046 6R2036 6R5690 6R5671 6R6377 6R2035 6R6229 6R5660 6R6410 6R6428
6R6428 6R6446 6R6407
6R6407
6R6377 6K6022
6R6031 6R6320 6R6046 6R5691 6R6477
6R6477 6R6430 6R6080 6R488138
6R5581
6R6048
IRC
PART
No.
BTS-470K BTS—
15K
BTS-1000
BTS-1000 BTS-1000 BTS-33K BTS-2700 BTS-10
Meg.
BTS-10K
BTS-1000 BTS-4700 BTS-
2.
2
Meg.
BTS-4700
BTS-4.7
Meg.
BTS-4.7
Meg.
BTS-4700
BTS-1000 BTS-1000 BTS-1000
BTS-33K BTS-1
Meg.
BT-2-6800 BT-2-4700 BTS-470K BTS-8200
BTS-33K BT3-S800 BTS-6800
BTS-4.7
Meg.
BTS-220K
BTS-220K
BTS-470K
BW-i-330 BTS-100K
BTS-10K BTS-1Meg. BTA-6800
BTS-15K
BTS-15K BTA-10K BTS-4700 BT-2-220K
BTS
-3300
BTS-47K
IDENTIFICATION
CODES
ALL
RESISTORS
t
10?
TOLERANCE
UNLESS
OTKtRWISESTATED
Yl.-Vi.-Yl.
External
Ground
Isolation
Br.-Grn.-Or.
RF
Amp.Grid
Blue-Gray-Blk.
RF
Amp.
Cathode
Br.-Blk.-Red
Voltage
Dropping-See
Note
1
Br.-Blk.-Red
" "
Br.-Blk.-Red
RF
Amp.
Plate
Decoupling
Or.
-Or.
-Or.
Conv.
Grid
Red-Vi.-Red
Conv.
Cathode
Br.
-Elk.
-Blue
Feedback-deeNote
1
br.-Blk.-Or.
Osc.
Grid
Br.-Blk.-Red
Osc.
Plate
Yl.-Vl.-Red
1stIF
Amp.
Grid
CoilShunt
Red-Red-Grn.
Bias
Network-See
Note
1
Or.-Or.-Blk.
1stIF
Amp.
Cathode-See
Note
2
Yl.-Vi.-Red
1stIF
Amp.
Plate
Yl.-Vi.-Grn.
Bias
Network
Yl.-Vi.-Grr.
"
"
Or.-Or.-Blk.
2ndIF
Amp.
Cathode-See
Note
2
Yl.-Vi.-Red
2ndIF
Amp.
Plate
Br.-Blk.-RedDecoupling Br.-Blk.-RedVoltage
Dropping
Blue-Gray-Blk.
3rdIF
Amp.
Cathode
Br.-Blk.-Red
Voltage
Dropping
Or.
-Or.
-Or.
Bias
Network-SeeNote
3
Br.-Blk.-Grn.
Video
Amp.
Grid-See
Note
4
Or.-Or.-Blk.
Video
Amp.
Cathode-See
Note
5
Blue-Gray-Red
"VoltageDropping-See
Note
6
Yl.-Vi.-Red
" "
Yl.-Vi.-Yl.LimiterGrid-See
Note
7
Gray-Red-Blk.
LimiterCathode
Br.-Blk.-Red
Limiter
Decoupling
Br.-Gray-Br.
Balancing-See
Note
8
Or.
-Or.
-Or.
De-emphasis
Blue-Gray-Red
Diode
Load-See
Note
9
Blue-Gray-Red
"
" " " "
Yl.-Vl.-Grn.
Audio
Amp.Grid
Red-Red-
Yl.
Audio
Amp.
Plate-See
Note
10
Red-Red-Yl.
AudioAmp.Decoupling
Yl.-Vi.-Yl.
Audio
OutputGrid-See
Note
10
Or.-Or.-Br.
Audio
Output
Cathcde
Br.-Blk.-Yl.
ClipperGrid-See
Note
11
Br.-Blk.-Or.
Current
Limiting
Br.-Blk.-Grn.
Clipper
Plate
Blue-Gray-Red
2nd
Clipper
Plate
Br.-Grn.-Or.
AFC
CoilShunt
Br.-Grn.-Or.
Peaking-See
Note
12
Br.-Blk.-Or.
Horlz.
Block.Osc.
Grid
Yl.-Vi.-Red
"
"
" "
Red-Red-Yl.
Bias
Network
Or.
-Or.
-Red
AFC
Cathode
Yl.-Vi.-Or.
Integrator

038 039 C40 041 042 C43
C44 C45
046 C47
048
049 050 051
052
053
054 055 056
C57
058 059 C60
C61 C62
063
064
065 C66 C67
C68 069 C70 071
C72 073
074
C75 C76
077 C78
C79 080 081 C82 C33
C84 C85 C36 C87 CSS
C89
C90 091 C92
093
C94
5000
5000
500
.002
5000
1000
10000
5000
1500
.05 .02 .05
.05
100
20
.03 .5
200 680 900
.001 .001 .01 .01
250
1000
.05 .1
250
.004
250
100
.005 .005
.05
.005 .005 .05 .1
1300 1000
1000
250
250 250
250
1000
250
.05
15
20 500
500
.01
1000
.01
6
500 600
600 600 600
600
600
200 SCO
500
1000
6000
6000
600
600 500
500
600 600
600
500
600C
6000
600
6000 6000
600 300
500
500
500
500 500 500 500
600 500
500
600
600
21A470789
21A470789
31R6590 8A471157
21A470789
21K478410 21K482726 21A470789
314470790 8A471151 8A471152 8A471151 8A471151 21R6631
21K470322
8A482184 8A484814 31R6629 21R2741 21R2739
8A480355
8A480255 8A471153 3A471153
21R6648
21R6630
8A471151
SA471149 21A481402 8A471156 21R6648 21A471211 8K48866 8K48866
8A471151 8A
47
1348
8A471348
8A471151 8A471355
21R2738
21K478410 21R6638
21R6648
21R6648 21R6648 21R6643
21K478410 21R6648
8A471151
21K470333
21K470322 21R6579
31R6579 8A471153
21K478410
8A471153 21K470324
1467-005
1467-005 1468-0005 684-002 1467-005 1468-001
1467-01
1467-005
1467-0015
684-05 684-02 684-05 684-05
1468-0001 684-03 48
4-.
5
1468-002 684-01 684-01 1468-00025
1468-001 684-05 634-
.
1
1468-00035 684-004
1468-00025 1468-0001
684-05
684-05
484-.
1
1468-001 1468-001 1468-00025 1468-00025 1468-00025 1468-00025 1468-001
1468-00025 684-05
1468-0005 1468-0005 684-01 1468-001 684-01
IDSDo
1D5D5
5W5T5
DT6D2 1D5D5 1W5D1
1D3S1 1D5D5 IW5D15
DT6S5
DT6S3 DT6S5 DT6S5
5W5T1
DT6S3
DT4P5 5W5T2
DSTH60D1
DSTH60D1 DT6S1 DT6S1 5W5T25
1W5D1 DT6S5
DT6P1
5W5T25
DT6D4
5W5T25
5W5T1 DSTH60D5 DSTH60D5 DT6S5 DSTH60D5
DSTH60D5
DT6S5 DT4P1
1W5D1
1W5D1
5W5T25 5W5T25 5W5T25 5W5T25
1W5D1 5W5T25
DT6S5
5W5T5
5W5T5
DT6S1 1W5D1 DT6S1
MW.5-25
W
.
5-25
MO.
5-35
ST-6-002
MW.5-25
MW.5-21
MW.3-11 MW.5-25
MW.
5-215
ST-6-05
ST-6-02
ST-6-05 ST-6-05 MO.
5
-31
ST-6-03 ST-2-5 MO.
5-32
STM-60-001
STM-60-001
ST-6-01
ST-6-01
MO.
5-325
1*1.5-21 ST-6-05 ST-6-1
MO.
5-325
ST-6-004 MO
.
0-325
MO.
5-31
STM-60-005
STM-60-005
gT-6-05
STM-60-005 STM-60-005 ST-6-05
ST-3-1
MW.5-21
MW.5-21 MO
.5-325
MO.
5-325
MO.
5-
325
MO
.5
-325
MW.5-21
MO.
5-325
ST-6-05
MO
.
5-35
MO.
5
-35
ST-6-01
MW.5-21 ST-6-01
1F11-25
1FM-25 1FM-35
TM-22
1FM-25 1FM-21
1FM-11 1FM-25
1FM-215
TM-15
m-12 TM-15 TM-15
1FM-31 TM-13 TC-5
1FI1-32 TVM-216
TVM-316
TM-11
TM-11
1FM-325 1FM-21 TM-15
TM-1
1FM-335
TM-24
1FM-325
1FM-31
TVM-256
TVM-256 TM-15 TVM-256
TVM-256
TM-15
TM-1
1FM-21 1FM-21
1FM-325 1FM-325 1FM-335 1FM-325
1FM-21
1FM-325
TM-15
1FM-35
1FM-35
TM-11
1FM-21
TM-11
Llffiiter
Cath.
Byp.
R62
LlmiterDecoup.
"
R63
Diode
Load-Note
13R64
De-emphasis-Note
14R65
Audio
Coupling
"
R66
Note
15R67
Tone
Comp.-Note
6
"
R68
Audio
Coupling
"
R69
Note
16
R70
Audio
Coupling
"
R71
Audio
Plate
Bypass
R72
Note
17
R73
Audio
Plate
Decoup.
R74.
Output
Plate
Bypass
R75
Sync,
coupling
R?6
n
n
R77
Fixed
Trimmer-Note
6
R73
Feedback-Note
13
"
R79
Hor.
Osc.
Grid
R80
««
R81
AFC
Coupling
R82
Fixed
Trimmer
R83
Hor.
Coupling-Note^ig
R85
Integrating
Network
R87
"
"
R88
Vert.
Sync.
Coupling
R89
Feedback
R90
"
R91
Vert.
Discharge
RjJ|
Linearity
Comp.
"
R^
Voltage
Divider
R95
n
ii
ii
R96
Vert.
Coupling
R^
n
'I
Kuo
DOG
10KS2
100KB
3.3
Meg.
2.3
Meg.
10
Meg.
10
Meg.
10
Meg.
10
Meg.
100K2
220K2 4.7
Meg.
4.7
Me*.
470K2 4.7
Meg.
4.7
Meg.
4.7
Meg.
4.7
Meg.
1
Me£.
1
Meg.
2.2
Meg.
3.3
Meg.
2.2
?
2.2F
eg'
eg-
470K2 150K2 100S
332
1002 470K2
10K2
39132
27KS2
18KS2 10K2 470KB
3.3
Meg.
4.7
Meg.
15
Meg.
H.V.
Filter-Note
4
Note
1-Not
t
z 2 2
2
1
2
2 i 2
i
4
1
1 1 1
t 2
1
2
2
2
I 2
2 i
6R6320
6R6031 6R6497 6R6433 6R5632 6R5623
6R5632
6R5622
6R6031
6R6407
6R476018
6R476018
6R6377 6R6446 6R6446 6R6446 6R6446 6R6046 6R6046
6R3011
6R2011 6R2011 6R2011
6R6377 6R6398
6R641E 6R203b 6R3963
6R6377 6R6330
6R5588 6R6434 6R5591
6R6320
6R6377
6R6497
6R6446
6R476065
BTS-10K BTS-100K BTS-3.3
Meg.
BTA-2.2
Meg.
BTS-10Meg.
BTS-10Meg. BTS-10
Meg.
BTS-10Meg. BTS-100K BTS-220K
BTA-4.7
Meg.
3TA-4.7
Meg.
BTS-470K BTS-470K
BTS-150K BTS-470K
BTS-10K
BTS-39K
BTS-27K
BTS-18K BT3-10K
BTS-470K BTS-3.3
Meg.
BTS-4.7
Meg.
BTS-15
Meg.
Br.-Blk.-Or. Br.-Blk.-Yl.
Or.
-Or.
-Grn.
Red-Red-Grn
.
Br.-Blk.-Blue Br.-Blk.-Blue Br
Br. Br
-Blk.-Blue
-Blk.-Blue -31k.
-Yl.
FeedbackNetwork
Vert.
Sweep
Osc.
Grid
Vert.
Sweep
Osc.
Plate-See
Note
13
Feedback
Feedback Vert.
SweepOutputGria
VoltageDivider
Red-Red-
Yl.
Yl.-Vl.-Grn.
Yl.-Vi.-Grn.
Yl
Yl
Yl
Yl
Yl
.
Br
-Vi.-Yl.
-Vi.-Grn. -Vi
.
-Grn.
-VI
.-Grn.
-Vi
,-Grn
.
-Blk.-Grn
Vert.
Sweep
Output
Plate-See
Note
14
Picture
Tube
Cathcde-See
Note
17
Deflection
Plate
Load
Voltage
cropping
Br
-31k.
-Grn.
Red-Red-Grn.
" "
Red-Red-Grn.
" "
ROG
RBG
Yl
Br Br
-Hed-Grn. -Red-Grn.
-Vi.-Yl. -Grn.-Yl. -Blk.-Br.
"
"
Isolation
Hi.
V.
Osc.
Grid
HI.
V.
Osc.
Cathode
Or
-or.-Bik.
Br.-Blk.-Br. Yl.-Vi.-Yl.
Br.-Blk.-Or.
Or.-Wh.-Or.
Red-Vi.-Or,
Br
.
-Gray-Or
.
Br.-Blk.-Or.
Yl.-Vi.-Yl.
Or.
-Or.
-Grn.
Yl.-Vi.-Grn.
Br.
-Grn.
-Blue
parasitic
suppressor
Hi.
V.
Decoupling
-See
Note
18
Isolation
2nd
Clipper
Grid
Horiz.
Osc.
Trans.
Prl.
Shunt
Horiz.
Osc.
Trans.
Sec.
Shunt
Horiz.
Osc.
Grid
Differentiator
Vert.
Block.
Osc.
Grid-See
Note
15
Vert.
Block.
Osc.
Plate
Feedback-See
Note
16
used
In
Chassis
TS-4J.
""
Note
2-Chassis
RF
Bypass-Note
20
Note
3-Chassls
"
"
loca
Fixed
Trlmmer-5%
Note
4-Not
RF
Bypass-Note
3
"
Note5-Used
ted
use
in
Fil.
Bypass
Note
6-Chassis
"
"
Note7-Not
TS-4J
uses
562
TS-4J
uses
2.2
in
the
2nd
Det
d
in
Chassis
TS
ChassisT3-4B, TS-4B,
C,D,E
In
this
application.
Meg.
In
Oils
application.
In
Chassis
TS-4B
& C
.
circuit
ca
-4B,
C,D &
n
.
E.
this
part
is
C,D & E
onlv.
uses
62002
used
in
ChassisTS-4B,
C,D,E
"
"
Note
8-Chassis
""
Note9-Chas
sis
in
this
application.
&
J.
TS-4B
uses
3302
in
this
application.
T3-4B
uses
10K
S,
in
this
ap
pi
Lcation.
TS-4C
uses
3802.
"
"
Note
10-Thls
part
is
incoroorated
ina
coupling
plate
in
Chassis
TS-4D.
"" "
Note
11-Chassl
""
Note
12-Cha
ssi
s
TS-4J
uses
1
s
TS-4E
& F use
Line
Isolation
Note
13-Chassis
TS-4E
uses
3.
FixedTrimmerNote
14-Chassis
T3-4J
uses
6.
Osc.
Grid
Note
15-Cha
ssi
s
TS-4D
uses
3.
leg.
for
this
applicat
68002
inth
is
applica
ion.
tion.
3
Meg.
in
this
application.
8
Meg.
In
this
application.
3
Meg.
inth
Fixed
TrimmerNote
16-Chassis
TS-4D
use10
Meg.
in
this
"
"
Note
17-Early
chassis
modelsTS-4D
use1
is
applica
tion.
application.
Meg.
In
this
application.
TS-4B
& C
uses
2.2
Meg.
Vert.
Sync.CouplingNote
18-Chassls
TS-4B
& C use
L39
in
place
of
R89.
Fixed
Trimmer^
TRANSFORMER
(SWEEP
CIRCUITS)
FixedTrimmer-
"
Note
15
ITEM
•Parallel
sections
to
obtain
desired
capacity.
. No.
Note
1-Chassis
TS-4B,
C,D,E use150
MFD
S)250V.
Note
2-Chassis
TS-4B,
C use
1500
MMFD.
'
Tl
Note
3-Chassls
TS-4B
use
1500
MMFD.
Note
4-Not
used
In
Chassis
TS-4B,
C.T2
Note
5-Chassls
TS-4B
use
1500
MMFD,
TS-4D
use
1000
MMFD.
T3A
Note
6-Notused
on
Chassis
TS-4B,
C,D.
Note
7-Notused
on
Chassis
TS-4B,
C,D,E.B
Note
3-Not
used
on
Chassis
TS-4B,
C,D,J.T4
Note
9-Not
used
on
Chassis
TS-4B,
C,D,E,J.T5
Note
10-Chassis
TS-43
uses
2
I1MFD,
TS-4C,
D,
ti,
J use2.2
MMFD.
Note
11-Not
used
on
ChassisTS-4E,
F,G,H.J.
Note
12
-Not
used
on
Chassis
TS4F,G.H.
RATING
DC
RESISTANCE
PRI.
602 2602 3102 1702
4.52
Note
13-Chassls
TS-4B
uses
300
MMF.
'
,,,,„-
,,rpd
In
SEC.
1702 602
SEC.l
9002
SEC.
2
32
MOTOROLA
PART
No.
24B480
309
24B470154
358434819
(or)
25390138
24B480209
1X471212*
P'n^pRlR
TS-4B.
REPLACEMENl
STANCOR
PART
No.
C
& D.
DATA
THORDARbON
PART
No.
Note
14-Chassis
TS-4D
uses
1000
MMF.,
TS-4K,
F,H,G,J
none.
<pf11=
^Ta,^fnr^"\s
net
"used
in
Chassis
TS-4D,
E
Note
15-Used
on
Chassis
TS-4B,
C
only.
1™
«s
-ar
-n
Note
16-Chassis
TS-4B
uses
1500
MMFD,
Tfa-4C
uses
1000
MMFD,
TS-4D
uses
5000
MMFD
^
-
.-
Note
17-Chassis
TS-4C
uses
1000
MMFD,
TS-4E,
F,G,H.J use
none
Note
la-Chassis
TS-4E,
F use50
M'iFD.
Note
19-Chassis
TS-43,
C use
.0005
(aj
6000
V.
ITEM
Note
20-Chassis
TS-4E,
F use10
MFD
(g)
350V...No.
To
amb^r
includes
L300
MHFD.
c<
icacitor
(
F,
5,H.
Ite.T.
C77).
J
MERIT
PART
No.
TRANSFORMER
(AUDIOOUTPUT)
RATING
IMPEDANCE PRI.
28002
SEC.
3.2S:
DC
RES.
PRI.
2502
SEC.
.6S2
REPLACEMENT
DATA
MOTOROLA
PART
No.
25K470392
PARTS
LIST
AND
STANCOR
PART
No.
A-3376
THORDAR'N
PART
No.
T22S45
MERIT
PART
No.
A-2928
DESCRIPTIONS
CONTINUED
ON
PAGE
11.
NOTES
Horiz.
Block
Cso.
Trans.
Vert.
BlockOsc.
Trans.
§
Horiz.
Sweep
Push-Pull
Trans
.
AFC
Coupling
Trans.
T
Hi
Voltage
Trans.
00
INSTALLATION
NOTES
^
<r
a:

MOTOROLA
MODEL
VT71
COILS
(RF-IF)
PARTS
LIST
AND
DESCRIPTIONS
(Continued)
COILS
CCONTJ
Ld
o
ITEM
No.
LlA
B
L2A
B
LOA
B
L4A
B C
L5ft
B
C
L6 L7 L8
L9A
D
L10A
B
LllA
B
C
L12 L13 L14
Lib
U6
L17
LISA
B
a
nA ifR.
B
C
L2QA
B C
L21A
B
L22A
B
L23A
B
C
L24A
B
L25A
B
C
L26 L27
L23
L29
L30A
B
C
LSI
L32A
B
L33 L34
USE
Ant.
Input
ii
ii
Ant.
Coil
ii
n
ii
n
iiii ii
ii
ii
n
ii
ii
nn
ii
n
"
«
n
ii
RF
Coll
,i
ii
i
ii
i
n
t
n
i
n
i
ii
ii
nn
RF
Choke
Osc.
Coil
iiii
nn n
ii
n
n
n
n
n
ii
n
ii
ii
n
n
n
n
n
n
ii
nn n
ii
n
ii
II
H
II
II
IIII
"
II
RF
Choke
1stIF
2ndIF 3rdIF
2nd
Det.
Assy.
4th
IF
2nd
Det.
Assy.
SoundTake-
Otf
Peaking
11
Ratio
Det.
DC
RES.
PRI. .2S2
02
OSS OS 02
OS
OS.
02
02
02 OSS
OS,
OS. 02
02
no UK
02 OS! OSS OSS
OSS
02 OSS oa
02
OSS 02
02
02 QO
OSS 02 OS Offl OSS
02
02
02 02
02
OSS
02
02 02 02 02
02
.12 .62
.32 .32 .22
12
152
15S2
32
SEC.
.42
.62
REPLACEMENT
DATA
MOTOROLA
PART
No.
S4A432232 24A471186
24K484872 24B90177
24K478293
24KS0178 84K478294
24K9Q179 24K478293
24K478294
24K90180 24K478294
24A471374 24A471374 24A471374
24K484373
24K90182
24K478292 24K90133
24K90185 24KS0184 24K478292 24K90185 24A471372
24A471373
24A471373
24A471373
24A90064
24K434874 24K90187
24Kii-890C3 24KS0188 24K90189 24K489004 24K90189 24K90190 E4K489004
24K90190
24A489188
24A471370
24A4B5442
24A471368
24A47S283
24A489067
24A471367
24A485443
24A471369
24A478233
24A90193
24B90192
24K470313
24A90197 1X482133
24A470314
1X470396
24A470159
24A470745
24A470745 S4A470744 24B470316
MEISSNER
PART
No.
L3
NOTES
j^g
L3
Used
in
Chassis
TS-4D,
E,F,G,H & J.
L3
Used
in
Chassis
TS-4B
4 C.L4
Channel
Z
(c
3.
Used
in
Chassis
TS-4F,
G,.
Hand
J.
N
Channel
1.
Used
In
Chassis
TS-4B,
C,D
4E.
Channel
4.
Used
in
Chassis
TS-4F,
G,
K
i-
J.
Channel
2.
Used
in
Chassis
TS-4B,
C,D 4 E.
Channel
5.
Used
in
Chassis
TS-4F,
G,H
&
J.
Channel
3 & 4.
Used
in
Chassis
TS-4B.
Channel
3 & 4,
Used
in
Chassis
TS-4C,
D i.E.
HE
Channel
6.
Used
in
Chassis
TS-4F,
G,K i J.
N
Channel
5 & 6.
Used
In
Chassis
T8-4B.
Channel
5 & 6.
Used
in
Chassis
TS-4C,D
& E.q
Channels
10& 11.
Channels
8 & 9.
sr
Channel
7,
Channels
2 & 3.
Used
in
Chassis
TS-4F,G,H4J.
q
ChcLmcl
1
Used
In
CE~3,sc
is
^S
4BC D
&.
F
~^
Channel
4.
Used
in
Chassis
TS-4F,
G,H i J.
Channel
2.
Used
in
Chassis
TS-4B,
c,D
i
E.
Channel
5.
Used
in
Chassis
TS-4F,
G K 4 J.
Channels
3 & 4.
Used
in
Chassis
TS-4B.
Channels
344.
Used
in
Chassis
TS-4C,D
4 E.
IT
Channels
546.
(TS-4F,G,tt&J
channel
6
only)
N
''hannel^
12
&.
n3
Channels
10
i
11.
t'
Channels
8 & 9.
I'
Channel
7.
Channels
243
Used
In
Chassis
^3
4FG
H
& J.
ITE
Channel
1.
Used
in
Chassis
TS-4B,
C,D
&E.
Nc
Channel
2.
Used
in
Chassis
Ts-48,C,D
& E.
M3
Channel
4.
Used
in
Chassis
TS-4F.&
G.
Channel
5.
Used
in
Chassis
TS-4H
& J.
M4
Channel
344.
Used
in
Chassis
Td-4B,C,D4£.
MS
Channel
5.
Used
in
Chassis
TS-4F
& G.
Channel
6.
Used
in
Chassis
TS-4H
& J.
Channel
546.
Used
in
Chassis
TS-4B,C,D4E
(TS-4F
&
TS-4G,
Channel
6).
Channel
7.
Used
in
Chassis
TS-4H
& J.
Channel
7.
Used
in
Chassis
TS-4B,C,D,E,F$G
Channel
8 & 9.
Used
in
Chassis
TS-4H
andJ.
Channels
8 & 9.
Used
in
Chassis
TS-4B.
Channels
d
& 9.
Used
in
Chassis
TS-4C,D,
£,
F
&
G.
Channel
10& 11.
Used
in
Chassis
TS-4H
4 J
Channel
104 11.
Used
in
Chassis
TS-4B,
C,
D,
E,F & G.
Channel
124 13.
Used
in
Chassis
TS-4H
4 J.
Channel
12& 13.
Used
In
Chassis
TS-4B.
Channel
124 13.
Used
In
Chassis
TS-4C,
D,
E,F & G.
Chassis
TS-4D,
E,F,G,H & J.
Less
L30B.
Chassis
TS-4B
& C.
Less
L30B.
See
Note
Wound
on
1COK2
resistor.Used
in
Chassis
TS-4F,
G,H andJ.
Wound
on
39K2
resistor.
Used
In
Chassis
TS-4B,
0,D 4 E.
L35 L36
L37 L38 L3S
L40
RF
Fil.
Chk
ii
n n
iiii
n
ii
n
ii
RF
Choke
Ant
.
Input
Filter
.12 .12
.12 .12
24^90064 24A90C64
24A90064 24A90064 24A471242
24A90194
i
~
^
Q
Used
in
Chassis
TS-4B
& C
only.
n
ii
n
ii
,i
n
Note-On
Chassis
,-
other
chassis
H
this
coil
is
located
inthe
screen
circuit
ofthe
video
am.
Onall
onnected
iri
the
grid
circuit
ofthe
Sound
IF
Llraiter.
SPEAKER
ITEM
No.
SPIA
SP1B
SP2
RATING
FIELD
RES.
PM
CONE
DIA.
6"
V.C.
IMP.
3
.22
V. C.
DIA.
3/4"
REPLACEMENT
DATA
M3TOROLA
PART
No.
503471219 500471322
JENSEN
PART
No.
ST-109
Mod.
P6-W
GUAM
PART
No.
dA21
NOTES
Alternate
speaker
SELENIUM
RECTIFIER
ITEM
No.
lil 112
RATING
CURRENT
110
MA.
110
MA.
REPLACEMENT
DATA
MOTOROLA
PART
No.
(48B470395
orI
1471350
)
NOTES
MISCELLANEOUS
ITEM
No.
MSA
B
M4
M5
PART
NAME
Switch
"
Plug,LineCord BallastTube Core,Iron
and
Screw
n
n
ii
n
nn
n
ii
Core,Iron,Copper
4
Screw
Core,Brass
and
Screw
Core,
Iron
4
Screw
Socket
and
LeadsAssy.
Escutcheon
ii
1N34
Crystal
Cabinet
" 11
" " " 11 "
Knob
n
" » " 11
i
ti " "
'i "
MOTOROLA
PART
No.
1X489168
1X471377
2SK471323
17A470303 46A470302
46A70023
46K480256
46A471363 46A478242 46A470310
1X478281 13K485496
13B484875
48A90173
16K471438 16K478257 16K473258 16K<t71286
16K489079
16K489080 16K489081 16K489078
36K471545
36K471324
36K478251
36K478252
36K478201 36K478202 36K485449
36K485450
36B485448 36K485446 36K485447 36A485445
NOTES
Station
Selector used
in
Chassis
TS-4H
4 J.
StationSelectorused
In
Chassis
TS-4B,
C,D,
E,F&G
L34
Sec.used
inall
chassis.
L34
Prl.
used
In
all
chassis.
Bottom
of
L27,
used
inall
chassis.
L13
used
inall
chassis.
Ant.,
RFand
Osc.Coils.
Antenna,
RFand
Osc.Coils
Antenna,
RF,
Osc.
andIF
CoilSjand
topof
L27.
PictureTube Channel
Indicator.
Paper
for
Brown
Cabinets.Used
in
Chassis
TS-4F,
G andK.
Channel
Indicator.
Paper
for
BlondeCabinets.Used
in
Chassis
T3-4F,
G & H.
Video
Detector
Blonde
for
VT71B
(Chassis
TS-4B,
C,D &
E)
.
BrownMahogany
for
VT71MB
(Chassis
TS-4B,
C,D 4 E).
Red
Mahogany
for
VT71M
(Chassis
TS-4B,
C,D &
E)
.
Walnut
for
VT71
(Chassis
TS-4B,
C,D &
E)
.
Blonde
for
VT71B-A(Chassis
TS-4F,
G,H 4 J).
Brown
Mahogany
for
VT71MB-A
(Chassis
TS-4F,
G,H 4 J).
Red
-Mahogany
for
VT71M-A
(Chassis
TS-4F,
G,H 4
J)
.
Walnut
for
VT71-A(Chassis
TS-4F,
G,H &
J)
,,'alnut
Plastic-Plain
""
-With
Dot
Mahogany
Plastic-Plain
"
"
-with
Dot
Tan
Plastic-Plain
""
-with
Dot
Walnut
Plastic-For
ChannelSelector
Switch(TS-4H4
J)
Tan
Plastic-ForChannelSelector
Switch
(TS-4H
4 J)
Mahogany
Plastlc-For
ChannelSelectorSwttch(TS-4H
&J)
Walnut
Plastic-For
Fine
Tuning
(TS-4H
& J)
Tan
Plastic-For
Fine
Tuning
(TS-4H
& J)
Mahogany
Plastic-For
Fine
Tuning
(TS-4H
4 J)

ALIGNMENT INSTRUCTIONS
ALIGNMENT INSTRUCTIONS—READ CAREFULLYBEFORE ATTEMPTING ALIGNMENT
When performing alignment with receiver out of cabinet, It Is necessary to connect a Jumper
across terminals 1 & 14ofthe cathode ray tube socket to complete the heater circuit. It is
recommended that the high voltage be disabled during alignment to eliminate the shock hazard.
This maybe done by removing the 25L6 HI Voltage Oscillator and substituting a 75S2 10 Watt re-
sistor across Pins 3 & 7 to maintain continuity In the filament string. The high voltage may
also be disabled by disconnecting and taping the B++ lead supplying the plate and screen grid
of the 25L6 Hi Voltage Oscillator. Reconnect this lead after alignment Is-1 completed.
NEVER GROUND THE RECEIVER DURING TESTING OPERATIONS OR INSTALLATION UNLESS ISOLATION TRANS- '
FORMER 13 USED. However, a grounded coaxial line maybe connected tothe antenna terminal marked
"G" . ;
AUDIO TAKE-OFF J. RATIO DETECTORALIGNMENT
DUMMY
ANTENNA
1000MMF
1000MMF
SIGNAL
GENERATOR
COUPLING
High side toPin1
6AU6 (V6) . Low side
to B-.
SIGNAL
GENERATOR
FREQUENCY
4. SMC
(No Mod.)
CHANNEL
Any
CONNECT
VTVM
DC probe In
series with
10KS! to Point
^ .Common lead
toB-.
DC probe In
series with
10K2 to Point
G|> .Common lead
Yo B-.
ADJUST
A1,A2
A3
REMARKS
Adjustffor maximum deflec-
tion.
Adjust for zero reading.
A positive or negative
reading on either side
designates correct setting
IF AMPLIFIERALIGNMENT
If difficulty is experienced in observingmarker, a 1000 MFD capacitorshould be connected
• across the oscilloscopeinputterminals.
If distorted or unstable pattern is obtained during IF Alignment, It maybe necessary to
stop the oscillator by connecting a 1000 MHFD capacitorfrom the grid(Pin 7) of 1/2 toB-.
DUMMY
ANTENNA
Direct
SWEEP
GENERATOR
COUPLING
High side to Pin
1 6AG5 (V3). Low
side toB-.
SWEEP
GENERATOR
FREQUENCY
25MC
(12MC sweep!
MARKER
GENERATOR
FREQUENCY
25MC
23MC
27MC
S2.1MC
22 . IMC
& 27MC
CHANNEL
Any
"
CONNECT
SCOPE r
Vertical amp.
to Point <O .
Low side toB-.
ADJUST
A4-
A5
AS
A5
A4
REMARKS
Adjust for maximum
amplitude at marker.
Adjust A6to place
27MC marker 50% up
the high freq. side
of the responsepat-
tern.(See FjR. 11
Adjust A5 until 22.1
MC marker Is 5056 up
the low freq. side of
the response pattern.
(See FiR. 1)
Adjust A4for flat
top or symmetrical
curve. If necessary,
repeatSteps 3,4,5,
6& 7 to obtain de-
sired pattern asper
Fig. 1.
1ST IF TRANSFORMERALIGNMENT
The primary of L27 affects thelow frequencyside ofthe waveform andthe secondary affects
the high frequencyside. The adjustments A7& A8 should be done simultaneously. The object Is
to obtain as flat and wide a responsecurve as possible with as much gain as possible. The bOf,
markers give a visualmeans of determining the band width. The contrast controlshould beset
at 8056rotationtowardmaximum gain while adjusting this transformer. It should be notedthat
Figures 1 & 2 are similar, the main differencebeingthat the sides ofthe pattern are steeper
In Figure 2. . ..
DUMMY
ANTENNA
)lrect
SWEEP
GENERATOR
COUPLING
High side to
Pin 2 12AT7
(V2) . Low side
to bottom end
of R17.
SWEEP
GENERATOR
FREQUENCY
25MC
J.2MC Sweep)
MARKER
GENERATOR
FREQUENCY
22.4MC,
&26.4MC'
CHANNEL
Any
CONNECT
SCOPE
Vertical amp.
to Point ^ .
Low side to
B-.
ADJUST
A7.A8
REMARKS
Adjust A7& A8 until
markers are 5056 up
their respective sides
of the pattern per
Fig. 2.
OSCILLATOR ALIGNMENT
9
10
11
12
13
14
15
16
Reconnect oscillator if disabled during IF Alignment. Output of signal generator and vertical
amplifier of scope should beat maximum gain. Synchronize scope to60 '"Vj ora harmonic thereof.
If receiver has fine tuning control, pre-set this control at mid-capacity.
On Chassis TS4B, C,D & E disregard "A" adjustment points. Refer to line drawing showing
antenna, RFand oscillator alignment points for these chassis.
DUMMY
ANTENNA
Direct
"
»
"
»
"
"
"
SIGNAL
GENERATOR
COUPLING
High side to Pin 1
6AG5 (VI). Low side
to Junction ofR14
& C27.
"
-
•
"
11
"
"
SIGNAL
GENERATOR
FREQUENCY
81.45MC
(No Mod.)
S7.45MC
93.45MC
103.45MC
109.45MC
152.S5MC
158.35MC
164.35MC
170.35MC
176.35MC
182.35MC
188.35MC
CHANNEL
2
or
3.
4
5
6
7
8or
9
10 or
11
12or
13
CONNECT
SCOPE
Vertical amp.
toPin3 12AT7
(V2) . Low side
to B-.
"
«
"
"
•
•
•
ADJUST
TS-v4F, G
HJJ ONLY)
A9
MO
All
5.12
A13
A14
A15
A16
REMARKS
Adjust for zero beat. This
Is indicated by sharply
defined trace, that appears
between two wide traces
as coil Is tuned through
resonance.
«
11
"
"
-
•
-
ric. i
FIG. 2
FIG. 3
PAGE 6

ALIGNMENT INSTRUCTIONS (CONTJ
ANTENNA 1 RF COIL ALIGNMENT
17A
17B
18
19
20
21
Disconnect L26 from cathode of oscillator tube (Pin 3-1.JAT7 V2). Note that the antenna coils
are tuned first for the picture carrier frequency and then theRF colls are adjustedsecond for
the sound carrier frequency.
On chassis TS-4B, C,D & E disregard "A1 adjustment points. Refer to line drawing showing
antenna, RF' ana oscillator augment points for these chassis.
DUMMY
ANTENNA
Direct
Direct
Direct
SWEEP
GENERATOR
COUPLING
High side to
bottom "A"on
antenna termi-
nal strip. Low
side to"G"
SWEEP
GENERATOR
FREQUENCY
57MC
(10MC
sweep)
63MC
( 10MC
sweep)
69MC
(10MC
sweep)
MARKER
GENERATOR
FREQUENCY
55 . 25MC
& 5L.75MC
61 . 25MC
&65.75MC
67.25MC
471. 75MC
Channels 5 & 6 are aligned with AM Signal Ge
Direct
Direct
High side to
bottom "A"on
antenna termi-
nal strip. Low
side to"G"
Not Used
77.25MC
(400 %
3056 Mod.)
81.75MC
(400 ^
30£ Mod.)
83.25MC
(400 <\,
30* Mod.)
87.75MC
(400 '\,
30* Mod.)
CHANNEL
2
3
4
CONNECT
SCOPE
Across Rio .
(Converter
cathode resis-
tor)
nerator Instead of sweep
5
6
Across R18.
(Converter
cathode resis-
tor)
.ADJUST
frs-^F.G
H&.J ONLY,
A18,
A17
A18,
A17
A20,
A1&
REMARKS
Adjust for maximum
amplitude & symmetry
andfor placement of
markers asper Fig. 3
"
generator.
ASS~,
A21
A24,
A23
Adjust for maximum
amplitude.
There areno antenna coll adjustments for Channels 7 through 13.TheRF Colls for these
channels are adjusted as follows, using AM Signal Generator and Oscilloscope connected as
ab ove .
A. If Channels 3 & 6 havebeen setup adjust A25for Channels 8,10& 12to maximum response
at 195MC in Channel 10.
B. If Channels 2,4 & 5 have been setup adjust A25for Channels 7,9,11& 13to maximum re-
sponse at 189MC In Channel 9.
ALTEFiNATE ANTENNA 4. RF COIL ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM
17A
18
20
DUMMY
ANTENNA
Direct
Direct
Direct
Direct
Direct
SIGNAL
GENERATOR
COUPLING
-Ugh side to lower
"A" terminal on ant.
terminal strip. Low
side to "R".
SIGNAL
GENERATOR
FREQUENCY
55.25MC
(No Mod.)
& 59.75MC
(No Mod.)
61.25MC
(No Mod.)
& 65.75MC
(No Mod.)
67.25MC
(No Mod.)
& 71.75MC
(No Mod.)
77.25MC
(No Mod.)
& 81.75MC
(No Mod.)
83.25MC
(NO Mod.)
& 87.75MC
(No Mod.)
CHANNEL
2
3
4
5
6
CONNECT
VTVM
DC probe to
Point ^J> .Common
lead toB-.
ADJUST
A18
A17
A18
A17
A20
A19
A22
A21
A24
A23
REMARKS
Adjust for maximum de-
flection.
For Channels 7 through 13 follow same procedure as outline in Step 21. Instead ofa scope
being used asan output Indicator a VTVM connected as above maybe used.
ANT. COL R.F. COIL OSC. COIL
ADJUSTMENTS ADJUSTMENTS ADJUSTMENTS
0
11 O -H
JH O h
79
<o
ANT.j RF. &OSC. COIL ADJUSTMENTS FOR CHASSIS TS-4B.C.D&E
PAGE?

0
n
o
A
F
AMP.
1/2
V9
A
F
OUTPUT.
VIO
RATIO
DET.
RF
AMP
MIXER
osc
1ST
VIDEO
IF
2ND
VIDEO
IF
3RD
VIDEO
IF
VIDEO
AMP
VIDEO
DET.
1ST
CLIPPER
I/2VII
2NDCLIPPER
I/2VII
HORIZ.
OSC.I/2VI2
HORIZ.
AFC
1/2
V
12
PICTURE
TUBE
V
16
H.V.
OSC
H.V.RECT.
VERT.
OSC.
I/2V9
VERT.
OUTPUT
VI3
RECTIFIER
RECTIFIER
BLOCK
DIAGRAM

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CHASSISBOTTOM
VIEW-RESISTOR
IDENTIFICATION
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CHASSISBOTTOMVIEW-CAPACITORIDENTIFICATION
L/1A
130
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V10H010W

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n
VOLTAGE
AND
RESISTANCEMEASUREMENTS
VOLTAGE
READINGS
RESISTANCE
READINGS
Item
V
1
V
2
V
3
V
4
V
5
V
6
V
7
V
8
V
9
V10 V
"
V12
V13
V14
V15
V16
Tub.
6AG5
12AT7 6AG5
SAGS
6AG5 6AU6 6AU6
6AL5
12SN7GT
25L6GT
12SN7GT 12SN7GT-
6SL7GT
25L6GT
1B3GT
Pin
1
125VDC
210VDC
-
.
6VDC
35VDC
125VDC
-
.
4VDC
95VDC
.1VDC
-.5VDC
0V.
-1VUC
16.5VDC
"-44VDC
-2
.
2VDC
0V.
DO
NO"-
Pin
2
125VDC
0V.
.1VDC
110VDC
125VDC
0V.
115VDC
-
.
1VDC
19VUC 54VAC
21VDC
125VDC%<
225VDC"
T
53VAC
MEASURE
Pin
3
50VAC
4VDC
39VAC 32VAC
25VAC 19
VAC
50VAC
12VAC
0V.
110VDC
ov.
;
-i
->
1.5VDC
OV.
230V
DC
Pin
4
44VAC
39VAC
32VAC 25VAC
19VAC
12VAC
55VAC
7VAC
Pin
5
215VDC
39VAC
7OVDC
180VDC
200VDC
90VDC
220VDC
-.1VDC
-.7VDC
Eg,
120VDC
117VDC"
-26,5'VDC
-.8VDC
230VDC
OV.
1B8VDC
-26
.
5VDC
270VDC
OV.
Pin
6
215VDC 220VDC
110VDC
215VDC 200VDC
165VDC 220VDC
OV. OV.
OV.
120VDC
2.8VDC
OV. OV.
•
Pin
7
125VDC
-3.2VDC§
.1VDC
110VDC
125VDC
OV.
115VDC -
.
1VDC
20VAC 30
VAC
34VAC
20VAC
53VAC
80VAC
Pin
8
-
OV. . _
.
_
_
7VAC
10VDC 49VAC
34VAC
48VAC
3.2VDC
Pin
9
_
44VAC
_
.
_
_
_
_
_
_ _
_ .
PINS
1 2 3 4 5 6 7 8 9 1011121314
60VDC
7JP4
0V.
210VDC
0V.
t
T
t t t t
7VAC
Item
V
!
V
2
V3
V
4
V
5
V6
V
7
V8
V
»
V10
v
n
V'2
V13
V14
V'5
V16
Tub*
6AG5 12AT7 6AG5
6AG5
6AG5 6AU6
6AU6
6AL5 12SN7GT
25L6GT
12SN7GT
12SN7GT
6SL7GT
25L6GT
1B3GT
PINS
1
7JP4
|02
Pin1
16K2**
12002*
3
Meg.
2.5
Meg.
10002**
1
Met.
470K2**
6.8K2
4.7
Meg.
INT.
2
Meg.
24K2
10K2
10
Me,;.
INF.
INF.
2
46CK2* 700KS2*
Pin
2
10002**
33K2
332
INF.
10002»*
oa
822**
6.8K2 440K2*
308
1
Meg.**
17K2*
sona*
INF.
272
INF.
7,
4
02
INF
.
Pin
3
262
2.7K2
22S2
18B 14ffl 102 27S! sa 02
2302**
OS
2102
OS!
3002"
INF.
5
INF.
I
Pin
4
232
222
182
142 102
52 302
22
8,3
Meg.
3.3
Mee.
02**
10KS2*«
150K2*
10
Meg.
3352*
INF.
6
7
NF.
IF-'F.
Pin
5
12002*
222
INF
.
*
6K2* 12002* 12K2*
12002*
1
Meg.
7.2'
Meg.'
2.5
Meei
470K2
7K2*
150K2* INF.
150K2
INF.
6
I:;F.
i
Pin
6
12002*
12002*
INF.*
12002* 12002*
4.8K2*
12002*
470K2
02
INF.
02»*
3.3K2
02
02
INF.
,
910 NF
.
INF
Pin
7
10002**
lOKffi 332
INF.
10002**
02
822**
1
Meg.
112
402
22 112
272
362
INF.
11
INF.
I
Pin
8
-
.32
-
_
_
_
_
22
3302
2.52
202 252
1002
INF.
1213
NF
.
INF
Pin?
- 23a -
_
_
_
_
- -
-
_ _
_
TOP
CAP
12002*
14
22
TOO
NOT
MEASURE.
CANNOT
MAKEACCURATE
MEASI1REFENT
DUETO
HIGHIMPEDANCE
OF
CIRCUIT.
§TAK£N
WITH
VACUUM
TUBE
VOLTMETER.
•MEASURED
FROMJUNCTION
OFM2ANDPIN4 OF
MS.
••MEASURED
FROM
POSITIVE
TERMINAL
01
C-3B.
1- DC
Voltage
measurements
areat
20,000
ohms
per
volt;
AC
Voltages
measured
at
1000
ofims.
2-
Socket
connections
are
shown
as
bottomviews.
3-
Measuredvalues
are
fromsocket
pinto
common
negative
unless
otherwise
stated.
4-
Linevoltagemaintained
at117
volts
for
voltage
readings.
5-
Frontpanelscontrols
setat
maximum.
6-
where
readings
roay
varyaccording
tothe
setting
ofthe
servicecontrols,both
minimum
and
maximumreadings
are
given.

g
m
005
HDR.HOLD
500
MMF
A
PHOTOFACTSTANDARD
NOTATION
SCHEMATIC
©Howard
W.
Sams
&
Co.,Inc.1949