Zenith 19M20 User manual

PHOTO PACT* Fold
er
ZENITH CHASSIS
19M20, U,Z, 19M21, U,UZ,Z
VOLUME
CONTROL
ON-OFF
SWITCH
ZENITHMODEL
CHANNEL
SELECTOR
SWITCH
M1800R
TRADENAMEZenith
i
MODELS
M1800E, M1800R, R1800EZ, R1800RZ, R1812EZ, R1812RZ
M1800EU, M1800RU, R1800EUZ, R1800RUZ,R1812EUZ,
R1812RUZ.
M1800EZ,M1800RZ
M2228R,M2229E,M2229R,M2230E,M2230R,M2230RZ2,
Ma249E, M2249R,M2250E, M2250R, M2252E, M2252R,
R2229EZ, R2229RZ,R2230EZ,R2230RZ,R2249EZ,
R2249RZ,R2250EZ,R2250RZ,R2257EZ,R2257RZ,
R2258EZ,R2258RZ .
M2228RU, M2229EU,M2229RU,M2230EU,M2230RU,
M2249EU, M2249RU,M2250EU,M2250RU,M2252EU,
M2252RU, R2229EUZ,R2229RUZ,R2230EUZ,R2230RUZ,
R2249EUZ, R2249RUZ,R2250EUZ,R2250RUZ,R2257EUZ,
R2257RUZ, R2258EUZ,R2258RUZ
M228RZ,M2229EZ, M2229RZV M2230EZ,M2230RZ,
M2249EZ,M2249RZ,M2250EZ,M2250RZ,M2252EZ,
M2252RZ ,
M2250RUZ
CHASSIS
19M20
19M2OU
19M20Z
19M21
19M21U
19M21Z
19M21UZ
MANUFACTURER Zenith Radio Corp. , 6001 Dickens Ave. , Chicago 39, Illinois
TYPE SET Television
TUBESNineteen
Receiver
POWERSUPPLY110-120 Volts AC-60 Cycle RATING 1.6 Amp. (a> 117 Volts AC
TUNING RANGE Channels 2
Drive Cord Stringing
thru 13 VHP, 14 thru 83 UHF,Video IF 45. 75 MC, Sound IF 41.25 MC
INDEX
6,7 Photographs (Cont)
(Intercarrier)
, . . , 23 Trans. , Inductor Si Alignment Identification
Horizontal Sweep Circuit Adjustments 11 Servicing inthe Field
Parts List and Descriptions ....
Photographs
Cabinet-Rear View
Chassis-Top View
RF Tuner
Resistor Identification
15 thru 18 Schematic (Alternate Tuner)
Schematic (TV)
11 Trouble Shooting Aids
4,9 Tube Failure Check Chart ........
3 Tube Placement Chart (Bottom View)
10, 21 Tube Placement Chart (TopView) ...
14,19
12,
20
8
22
13
2
21
5
R
5
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HOWARD W. SAMS & CO.,INC. • Indianapolis 5, Indiana
"The listing ofany available replacement part herein does 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
parts have beencompiledfrominformationfurnished to Howard W. Sams & Co.,
Inc., bythe manufacturers ofthe particulartype of replacementpart listed."
"Reproduction or use, without express permission, of editorial or pictorial con-
tent, in any manner, is prohibited. No patent liability is assumedwithrespect to
the useofthe informationcontained herein. Copyright1954 by Howard W.
Sams & Co.,Inc.,Indianapolis 5, Indiana, U.S.of America.Copyrightunder In-
ternational CopyrightUnion. All rights reserved under Inter-American Copyright
Union (1910) by Howard W. Sams & Co.,Inc."Printed inU.S.of America
DATE 12-54
SET 259 EOLDER 16

THE COOPERATION OFTHE MANUFACTURER OF THIS
RECEIVER MAKES IT POSSIBLE TO BRING YOU THISSERVICE
» MEASUBED FROM PIN 1
A PHOTOFACT STANDARD NOTATION SCHEMATIC
©Howard W. Sami & Co.,Inc. 1954
PAGE 2

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SET259 FOLDER 16
PAGE 3

CHASSIS BOTTOM VIEW-CA
PAGE 4

JJ28) (C32J (C27
W-CAPACITOR IDENTIFICATION
PAGE 9

TUBE PLACEMENTCHART
1ST VIDEO IF
TOP VIEW
INDICATES BLANK PINOR LOCATING KEYON TUBESOCKET
SYNC
TUBE FAILURECHECKCHART
The following; chart lists tubeswhosefailures are most likely to produce the indicatedsymptoms.
Refer to tubeplacementchart for location and type of tube.
POWER SUPPLY FAILURE
No raster, no sound - V18
LOSS OF PICTURE OR SOUND
No pic, no sound, has raster - V2,V3,V4,V5,V6
No pic, no sound, has snow - VI, V2,V3
No pic, has sound, has raster - V6,V7,V19
Has pic, no sound - V8,V9, V10
Overloadedpicture -V7
SYNC FAILURE
No vert, sync - VJ, Vll
Nohoriz. sync-Vll, V13, V14
No vert, or horiz. sync - Vll
SWEEP FAILURE
No raster, has sound - V14,V15,V16, VI7, V19, Fuse (Ml)
No vertical deflection - V7, V12
Poor vert, linearity or foldover - V7, VT2
Poor horiz. linearity or foldover - V14,V15, VI6
Narrow picture - V14,V16, V17, V18
Vert, off freq. - V7,Vll
Horiz. off freq.-Vll,V13, VM
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SET 259 FOLDER 16
PAGE 5

ALIGNMENT INSTRUCTIONS
1.
2.
3.
4.
The high voltage lead should be securely taped and keptaway from the chassis. Donot remove the horizontal oscillator tube (V14) to disable the
high voltage .
VIDEO IF ALIGNMENT
Connect the negative lead ofa 2 volt bias supply tothe ungroundedside of C31.
Connect the positive side to chassis.
Connect the synchronized sweepvoltage from the sweepgenerator tothe horizontal input ofthe oscilloscope for horizontaldeflection.
DUMMY
ANTENNA
470MMF
SWEEP
GENERATOR
COUPLING
High side topin 1 (grid)
of 6CB6 (V5). Low side
to chassis.
High side to point <^> .
Low side to chassis .
SWEEP
GENERATOR
FREQUENCY
43MC
(10MC Swp)
MARKER
GENERATOR
FREQUENCY
39.75MC
45.75MC
39.75MC
41.25MC
47.25MC
42.75MC
«.OMC
45.75MC
CHANNEL
Any non
interfer-
ing
channel
CONNECT
SCOPE
Vert. Amp.thru
10KSJ to point <$> .
Low side to chassis
ADJUST
A1.A2
A3.A4,
A5
A6, A7,
A8,A9
REMARKS
Attenuate generator output for3 volts
peak to peak on scope. Adjust for response
curve of maximumamplitude and sym-
metry similar to Fig. 1.
Remove bias battery. Use maximum
scopegain to amplify trapregion of
response curve asin Fig. 2. Adjust for
MINIMUM marker amplitude. Reconnect
bias supply.
Attenuate sweepgenerator output to
maintain not morethan 3 voltspeak to
peak on scope. Alternatelyadjust A6 thru
A9 to obtain response similar to Fig. 3.
A6 affects the high side andA7 affects
the low side ofthe response curve.
OSCILLATORALIGNMENT
The master oscillator adjustment,A10, istobe madeonly ifthe individualchannel oscillator adjustment fails to bring the channel within the
range ofthe fine tuning control. If channels 2 thru 6 fall within the range ofthe fine tuning control
but the higherchannels do not , slight adjustment ofA10maybe necessary to bring inthe higher channels ,
Connect the negativelead ofthe bias supply tothe ungroundedside of C31.Connect the positive lead to chassis. Adjust for -1 volt at C31.
Turn upthe scopegain so that the soundtrap notch inthe responsecurvebecomes visible,.
Connect the synchronizedsweep voltage from the sweep generator tothe horizontal input ofthe oscilloscope for horizontal deflection.
The sweepgenerator output leadshould be terminated with its characteristic impedance,usually 50 ohms.
Setthe fine tuningcontrol tothe mid-position ofits range.
DUMMY
ANTENNA
Two 120S2
Carbon
Resistors
SWEEP
GENERATOR
COUPLING
Acrossantennater-
minalswith 120S2 in
each lead.
SWEEP
GENERATOR
FREQUENCY
57MC
(10MC Swp
63 MC
(10MC Swp
69MC
(10MC Swp
79MC
(10MC Swp
85MC
(10MC Swp
177MC
(10MC Swp
183MC
(10MC Swp
189MC
(10MC Swp
195MC
(10MC Swp
201MC
(10MC Swp
207MC
(10MC Swg
213MC
(10MC Swp
MARKER
GENERATOR
FREQUENCY
59.75MC
65.75MC
71.75MC
81.75MC
87.75MC
179.75MC
185. 7 SMC
191.75MC
197.75MC
203.75MC
209.75MC
215.75MC
CHANNEL
2
3
4
5
6
7
8
9
10
11
12
13
CONNECT
SCOPE
Vert. Amp.thru
lOK.fl to point <£> .
Low side to chassis
ADJUST
All
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
REMARKS
Adjust to placesound marker in trap
notch asin Fig. 4.
FIG.
FIG.2
FIG.3 FIG.4
PAGE 6

ALIGNMENT INSTRUCTIONS (cont)
HF AND MIXER ALIGNMENT
Remove the bias supply from C31and connect a jumper from the tuner AGC lead (yellow) to chassis.
Connect the synchronizedsweepvoltage from the sweep generator tothe horizontalinput ofthe oscilloscope for horizontal deflection.
The sweepgenerator output leadshould be terminatedwith its characteristic impedance, usually 50 ohms.
DUMMY
ANTENNA
Two 120S2
Carbon
Resistors
SWEEP
GENERATOR
COUPLING
Across antennater-
minalswith 120S2 in
each lead.
SWEEP
GENERATOR
FREQUENCY
69MC
(10MC Swp)
201MC
(10MC Swp)
MARKER
GENERATOR
FREQUENCY
67.25MC
71.75MC
199.25MC
203.75MC
CHANNEL
4
11
CONNECT
SCOPE
Vert. Amp.thru
10KS3 to point ^> .
Low side to chassis.
ADJUST
A23,
A24,
A25
A26,
A27,
A28
REMARKS
Adjust for response similar to Fig. 5.
Adjust A26andA27for symmetrical
response similar to Fig. 6. Adjust A28
for properbandwidth.Repeat steps 5
and 6 until best overall symmetrical
response is obtained.Removejumper
from tuner AGC terminal to chassis.
SOUND IF ALIGNMENT
Connect an attenuator {Zenith part #3-17203 or equivalent) in series with the receiverantenna.
Tune ina tonemodulated TV signal and adjust the attenuatoruntil the signal falls below the limiting level ofthe 6BN6 limiter detector, as
evidenced bya hiss similar to superregeneration.
Adjust the sound take-offtransformer(A29,A30) the sound IF transformer(A31) andthe quadrature coil (A32) for maximumsound of best
quality.
Adjust the buzzcontrol (R9) for minimum intercarrier buzz.
IIthe intercarrier buzzcannot be eliminatedwith the buzz control check the setting oftheAGC delaycontroladjustment.
II during the sound IF alignment the signal rises above the limitinglevel (hiss disappears) increase the attenuationuntil the hiss returns.
UHF TUNER ALIGNMENT
7.
8.
9.
Alignment oftheUHF tunershould notbe attempted unless proper test equipment is available.
Switch the receiver totheUHF position .
Connect the negative lead ofa 2 volt bias supply tothe ungrounded side of C31.Connect the positive lead to chassis.
Adjust the sweepgeneratoroutput to provide 3 volts peak to peak on scope,
Connect the synchronizedsweepvoltage from the sweep generator tothe horizontal input ofthe oscilloscope for horizontal deflection.
The sweepgenerator output leadshould be terminated with its characteristic impedance, usually 50 ohms.
DUMMY
ANTENNA
Fig. 8
SWEEP
GENERATOR
COUPLING
Across UHF antenna
terminalsthru
matching network(Fig.
8).
SWEEP
GENERATOR
FREQUENCY
713MC
(10MC Swp)
473MC
887MC
(10MC Swp)
MARKER
GENERATOR
FREQUENCY
711.25MC
471.25MC
885.25MC
CHANNEL
54
14
83
CONNECT
SCOPE
Vert.Amp.thru
IOKSI to point <$> .
Low side to chassis.
ADJUST
A33.A34,
A35
A36, A37
A38
REMARKS
Tunerrocket arm should beinthe horizontal
position. If necessary, loosen set screw and
adjust tuner shaft so that rocker armis
horizontal when the channelindicator isset
to channel 54.Donot adjust A33 unless
oscillator calibration isoff more than
three channels. If necessary, adjust A33to
place videomarket at50%on response
curve asin Fig. 7, The image(weaker re-
sponse) will appear also. The response to-
ward the counter clockwiseposition ofA33
isthe correct response. Adjust A34and
A35 for maximumamplitude and symmetry
of response similar to Fig* 7.
Check for response similar to Fig. 7.If
oscillator isoff morethan 3 channels
adjust the oscillator travel (osc., mixer and
ant, travel adjustments arethe three round
thumb screws ontopof tuner)adjustment to
scale. Care must be used in making this
adjustment soasnotto move the rocker
armoutofits bearing. Setthe mixer and
antenna travel adjustments for maximum
response on scope.
Adjust A36to place video marker at50%as
in Fig. 7. Adjust A37 andA38for maximum
amplitude and symmetry of response similar
to Fig. 7.
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FIG.5
F IG.6
FIG. 7
\ON CONTINUOUS TUNER
FIG. 8
PAGE 7

RESISTANCE MEASUREMENTS
Item
V 1
V 2
V 3
V 4
V 5
V 6
V7
V 8
V9
V 10
V 1 1
V 12
V 13
V 1 4
V 15
V 16
V 17
V 18
V 1 9
Tube
6BK7A
6U8
6CB6
6CB6
6CB6
12BY7
12AX7
6AU6
6BN6
6AQ5
6CS6
6AH4GT
6AQ7GT
6SN7GTA
6BQ6GT
6AX4GT
1B3GT
5U4G
17LP4
Pin1
t750B
tlO. 3KS2
1. IMeg
80KSJ
270n
15n
•5 Meg
100KB
350!!
350KB
19KB
1. 8Meg
2Meg
47KB
t!2KB
INF
PINS
INF
OB
Pin 2
60KB
68KS!
500B
80KB
420n
3Kn
270KB
on
.3n
680n
on
.in
IMeg
• 215KS2
.in
INF
1 - 8
30KB
lOOKn
Pin 3
INF
ylOOKB
.in
.1S2
.in
isn
40Kn
.in
.m
on
an
1. SMeg
on
on
6. 8KB
700KS!
HAVE
teen
PIN6
• 250KB
Pin 4
.in
.in
on
on
OB
on
on
on
on
.IB
OB
INF
3Meg
32KB
T12KB
INF
INFINITE
16B
PIN10
•32Kfi
Pin 5
on
on
1470B
tSOOB
t8. 2KB
on
on
f32Kn
t22KB
1.4KB
TlOOKB
t460n
t47Kn
teen
470KB
t7on
RESISTJ
INF
PINU
tSOOKSJ
Pin 6
INF
I300B
i470n
t50on
t8. 2KB
.IB
1 800KB
T32Kn
4.6B
tsoon
i. 8Kn
INF
470n
10KB
470KB
• 4. 2n
\NCE
isn
PIN 12
.in
Pin 7
3. 3Meg
on
on
aoKn
on
tsKn
3. 9Kn
on
• 680KB
350KB
jLlOMeg
OB
.IB
on
OB
.in
INF
Pin 8
47B
2.2KH
t22Kn
7.5Kn
i. 8Kn
on
.IB
on
on
30Kn
Pin 9
on
4.4KB
15B
.IB
TUP UAP
• 9. 4B
TDPT^SP"
• 414B
t MEASUREDFROM PIN2 OF V18
i MEASURED FROM PIN7 OFV4
• MEASURED FROM PIN3 OF V16
1ST VIDEO IF
2ND VIDEO IF
BOTTOM VIEW
VIDEO OUTPUT
LV RECT
HORIZ 8 VERT -
SWEEPPROTECTION
HORIZ DISCH
TUBE PLACEMENT CHART
PAGE 8

VHP TUNER-RIGHT SIDE
VHP TUNER-LEFTSIDE
PAGE1O

WIDTH
ADJ.
HORIZ.
DRIVE
CABINET-REAR VIEW
HORIZONTAL SWEEPCIRCUIT ADJUSTMENTS
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Turn thesetonand tune In a TV station, preferably a test pattern.
Setthe horizontalhold control adjustment until the picturesynchronizeshorizontally.
Adjust the horizontalDrivetrimmer (Bl) counterclockwise for maximum width.
Adjust the width fora picture slightly widerthan necessary to fill the picture maskhorizontally by sliding and turning
the brass sleeve onthe neck ofthe picturetube.
AGC DELAY CONTROL ADJUSTMENT
Connect the vertical amplifier ofan oscilloscope through a 10KSJ resistor to point <& . Low side to chassis.
Select the strongest TV signal available and adjust theAGC delay control for2.75 volts peakoutput.
Satisfactoryadjustment may also be obtained by turning theAGC delay control fully clockwise then counter
clockwise until picture distorts and buzz is heard inthe sound.Turn theAGC delaycontrolslowlyclockwiseuntil
a stable picture with clear sound is obtained.
SET 259 FOLDER 16
PAGE 11

TROUBLE SHOOTING AIDS
SWEEP
HORIZONTAL
LOSS OF SWEEP
Followprocedureoutlinedunder "Loss of High Voltage".
INSUFFICIENT SWEEP
Check by substitution V15 and V16. Checkadjustment Bl. Check T2, T4A,
R94, C77, C76and other associated components.
DRIVE LINES
Check by substitution V14, V15 and V16.Check T2, T4A.R90, R94, C77
and C79.Checkadjustment Bland other associated components.
COMPRESSED LEFTSIDE
Check by substitution V15 and V16. Check horizontal output and damper
stages for componentfailure or change of value.
Followprocedureoutlinedunder "Drive Lines".
PIE CRUST EFFECT
Check by substitutionV13, V14, V15and V16.Check C70for open.Check
L30 and other associated components.
XMAS TREEEFFECT
Check by substitution V13, V14, V15, and V16. CheckL30,C74,C75, C76
C77, R86, R90, R88and R87.Check T2andT4Afor Internal arcing.
VERTICAL
LOSS OF SWEEP
Check by substitution V7and V12.Check R3, R72,H6, H77, C57,C54,
C2D, T3,T4Band other associated components.
INSUFFICIENT SWEEP
Check by substitution V7and V12. Checkheight and vertical linearity
controls for proper operation. Check T3and T4B.
COMPRESSED AT BOTTOM
Check by substitution V7and V12.Check R3, H75, C57and other assoc-
iated components.
COMPRESSED ATTOP
Check by substitution V7and V12. Check R6, R77, C2Dand other associated
components.
Check by substitution V7and V12. CheckR72,C54, T3,T4Band other
associated components.
SYNC
LOSS OF VERTICAL AND HORIZONTAL SYNC
Substitute VU. CheckC51,C52, RIO, R68, R66and other associated
components. 't
LOSS OFVERTICAL SYNC-HORIZONTAL SYNC SATISFACTORY
Substitute V7. Check vertical integator network,check R5, R99, C55and
other associated components.
LOSS OF HORIZONTAL SYNC-VERTICAL SYNC SATISFACTORY
Substitute V13. Check horizontal AFC network. Check'RSO, C65, C70and
other associated components.
HORIZONTAL BENDING
Check by substitution V7, Vll and V13. Check components associated with
V13.
VIDEO
LOSS OF VIDEO
Substitute V6. CheckR43,L27, R8, R49, C43and other associated
components.
SOUND BARS (4.5 MC BEAT)
Adjust tuner fine tuning for best sound and picture. Checkadjustment
A30.Check video IF alignment.
POOR CONTRAST
Substitute V6. Check contrast control, picture tube,C43, L27 and C41.
Check videodetector crystal network.
NEGATIVE PICTURE
Substitute V6. Checkvideo detector crystal network,picturetube,C43,
C2C and R49.Check video IF alignment
Substitute V6. Checkvideo detector crystal network.CheckC43,C41,
L27, R49and other associated component.
WIDE BLACK BAR ACROSSPICTURE
Check by substitution VI, V3,V4,V5andV6for heater to cathode leakage.
AUDIO
WEAK ORNO SOUND
Check by substitution V8,V9and V10. Check stages V9and V10 usingaudio
signal genator. Apply audio signal across Rl.
If Satisfactory
Check audio IFand audio detector
stages for componentfailure or
change of value.
If Unsatisfactory
Check C49,C50, C1C, H65, R60,
R63, speaker, T5and other assoc-
iated components.
Adjust tuner finetuning for best sound and picture. Checkadjustments R9
and A32for minimum buzz. If still unsatisfactory, checkaudio IF alignment
DISTORTED
Follow procedure outlinedunder"Weak orNo Sound".
POWER
DEAD SET
If filamentsfall to light,check AC interlock assembly. Checkswitch on
volume control and Tl. If filaments light, substitute V18. Check B+filter
and decoupling network.
SMALL AND/OR DIM PICTURE
SubstituteV18.Check B+ filter and decouplingnetwork.
PAGE 12

PHOTOFACT STANDARD NOTATION SCHEMATIC
©Howard W. Somi S, Co.,Inc. 195J
'HP -UHF TUNER WRT NO. S2IOOI USED ON SOME MODELS
ALTERNATE TUNERSCHEMATIC
z'zn 'n 'L zw6 L 'z 'n y
H1IN3Z
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CHASSIS BOTTOM VIEW-RI
PAGE 14

f-RESISTOR IDENTIFICATION
PAGE 19

PARTS LIST AND DESCRIPTIONS
TUBES (SYLVANIA,GENERAL ELECTRIC, WESTINGHOUSE)
ITEM
No.
VI
V2
V3
V4
V5
V6
V7
V8
V9
V10
Vll
V12
VI3
V14
V15
V16
V17
V18
USE
RF Amplifier
Mixer - Osc.
1st.Video IF Amp.
2nd. Video IF Amp.
3rd.Video IF Amp.
VideoOutput
AGC Keying-
Vert. Mult.
Sound IF Amp.
Audio Detector
Audio Output
Sync Separator
Vert. Mult. -
Vert.Output
Horiz. AFC
Horiz. Oscillator-
Horiz. Discharge
Horiz. Output
Damper
HV Rectifier
LV Rectifier
REPLACEMENT DATA
ZENITH
PART No.
6BK7A
6U8
6CB6
6CB6
6CB6
12BY7
12AX7
6AU6
6BN6
6AQ5
6CS6
6AH4GT
6AQ7GT
6SN7GTA
6BQ6GT
6AX4GT
1B3GT
5U4G
STANDARD
REPLACEMENT
6BK7A
6U8
6CB6
6CB6
6CB6
12BY7
12AX7
6AU6
6BN6
6AQ5
6CS6
6AH4GT
6AQ7GT
6SN7GTA
6BQ6GT
6AX4GT
1B3GT
5U4G
RETMA
BASE
TYPE
9AJ
9AE
7CM
7CM
7CM
9BF
9A
7BK
7DF
7BZ
7CH
8EL
8CK
8BD
6AM
4CG
3C
5T
NOTES
CATHODE-RAY TUBE
ITEM
No.
VI 9
REPLACEMENT DATA
ZENITH
PART No.
17LP4 /
17VP4
21YP4
21YP4A (p
CBS-HYTRON
PART No.
17LP4
21YP4
21YP4A (D
GENERAL ELECTRIC
PART No.
17LP4 /
17VP4
21YP4
21YP4A CD
SYLVANIA
PART No.
17LP4 /
17VP4
21YP4
21YP4A O
21AFP4C2
WESTINGHOUSE
PART No.
17LP4
12YP4
21YP4A (J
RETMA
BASE
TYPE
12L
12L
12L
12M
NOTES
S> Aluminlzed
® Circuitchange
necessary
CAPACITORS
Capacityvalues given inthe rating column arein mfd. for Electrolytic
and Paper Capacitors, andin mmfd. for Mica and Ceramic Capacitors.
ITEM
No.
CIA
B
C
C2A
B
C
D
C3
C4
C5
C6
C7
C8
C9
CIO
Cll
C12
CIS
C14
CIS
C16
C17
CIS
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C32
C33
C34
CSS
C36
C37
C38
C39
C40
C41
C42
C43
C44
C45
C46A
B
C47
C48
C49
C50
C51
C52
CSS
C54
C55
C56
RATING
CAP.
• 40
.80
430
.40
• 10
A 10
100
40
40
40
40
2.5-6
400
800
400
2.2
400
400
400
.85-2.:
.6-3
800
100
19
2
400
2
4.5
10
5.5
400
470
24
9
6
.1
330
1000
.015
1000
470
1000
470
470
1000
47
.022
.1
3.3
50
1000
1000
10
.01
10000
.0068
.0033
27
.0022
.022
.33
.0022
VOLT
400 1
400 \0 1
450 1
450 I
400 (
50 J
400
200
200
200
200
1000
600
600
600
200
600
REPLACEMENT DATA
ZENITH
PART No.
22-2437
22-2483
22-2519
22-2519
22-2519
22-2519
22-2221
22-2401
22-2331
22-2401
22-2468
22-2401
22-2401
22-2401
22-2453
22-2504
22-2331
22-2407
22-2406
22-2536
22-2557
22-2536
22-2500
22-2411
22-2449
22-2557
22-2217
22-1777
22-2309
22-7
22-7
22-2302
22-7
22-2524
22-2217
22-2112
22-2467
22-1781
22-1777
22-2343
22-2460
22-2553
22-2378
22-3
22-3
22-2495
22-1785
22-2396
22-1845
22-2129
22-2159
22-2161
AEROVOX
PART No.
AFH3-46
AFH4-83
BPD-0008
SI2 . 2NPO
BPD-0008
SHOO
SI2 . 2NPO
SI10NPO
SI470
P288-1
BPD-001
P288-1
BPD-001
SI470
BPD-001
1469-0005
SI470
P288-1
BPD-2X001
P28<i-01
BPD-01
P688-0033
P688-0022
P288-33
CENTRALAB
PART No.
r
I
DD-801
TCZ-2.2
DD-801
D6-101
TCZ-2.2
TCZ-10
D6-471
DF-104
TCZ-331
DD-102
DF-104
DD-102
D6-471
DD-102
D6-471
DF-104
DD2-102
D6-103
DD-103
D6-332
D6-222
CORNELL-
DUBILIER
PART No.
C154
C032
BRH501
K067
TZ05
K067
TP34
TZ05
TP09
TP46
PJ2P1
K069
PJ2P1
K069
TP46
K069
5R5T47
TP46
PJ2P1
TZ06
TP30
DK069
PJ2S1
K082
CUB6D33
CUB6D22
PJ2P33
ERIE 1 MALLORY
PART No. PART No.
|f FP378
It TC72
|fFP396.2 ,
[
801-0008
NPOK-2R2
801-0008
GP1K-101
NPOK-2R2
NPOK-100
GP2K-471
801-001
801-001
GP2K-471
801-001
GP2K-471
812-001
811-01
GP2-333-332
GP2-333-222
-TC3501 l
UC-538
UC-538
UC-53I
ZT-541
UC-5347
PT401
DC-621
PT401
DC-521
UC-5347
DC-521
MCE245
UC-5347
PT401
DCD-521
PT411
DC-511
PT6233
PT6222
PT4033
SPRAGUE
PART No.
TVL-4670
TVL-3762
TVA-1705
5GA-T8
5TCCB-V22
5GA-T8
5GA-T1
5TCCB-V22
5TCC-Q1
5GA-T47
2TM-P1
5HK-D1
2TM-P1
5HK-D1
5GA-T47
5HK-D1
MS-35
5GA-T47
2TM-P1
5HK-2D1
2TM-S1
5HK-S1
6TM-D33
6TM-D22
2TM-P33
NOTES
Note 1
Note 2
Note 3
Note 4
Note 5
o
N -H
K) >
~ Vt
C -
J- w>
C
N
N
SET 259 FOLDER 16
PAGE 15

CAPACITORS (cont)
PARTS LIST AND DBS
RESISTO
ITEM
No.
C57
C58
C59
C60
C61
C62
C63A
B
C64
C65
C66
C67
C68
C69
C70
C71
C72
C73
C74
C75
C76
C77
C78
C79
C80
C81
C82
C83
C84
C85
RAT
CAP.
.1
1000
1000
.022
.033
.01
1000
1000
10000
100
120
.001
0047
.15
.001
.1
680
.0015
1000
1000
680
220
.047
.15
72
4.5
7
470
.15
.01
NG
VOLT
600
500
500
200
200
400
500
200
400
200
200
200
500
400
500
500
400
400
2000
200
200
REPLACEMENT DATA
ZENITH
PART No.
22-1841
22-2545
22-2545
22-1781
22-1840
22-1846
22-2545
22-3
22-9
22-2505
22-1839
22-1842
22-2166
22-1839
22-1777
22-2340
22-1785
22-2163
22-2112
22-2387
22-2458
22-1775
22-2341
22-2522
22-2375
22-3
AEROVOX
PART No.
P688-1
1464-001
1464-001
P4 88-01
BPD-2X001
BPD-01
BPD-0001
1469-0001
P688-001
P688-001
P288-1
1469-0007
P488-0015
1468-001
P488-047
SI470
P288-15
P288-01
CENTRALAB
PART No.
DF-104
D6-103
DD2-102
DD-103
DD-101
D6-102
D6-102
DF-104
D6-152
DF-503
D6-471
D6-103
CORNELL-
DUBILIER
PART No.
CUB6P1
1R5D1
1R5D1
CUB4S1
DK069
K082
G042
22B5T12
CUB6D1
CUB GDI
PJ2P1
LR5T68
CUB4D15
1H5D1
CUB4S47
PJ2P15
PJ2S1
ERIE
PART No.
GP2-333-103
812-001
811-01
801-0001
GP2-333-102
GP2-333-102
GP2-333-152
GP1K-471
MALLORY
PART No.
PT601
MCE-255
MCE-255
PT411
DCD-521
DC-511
UC-531
MCE235
PT621
PT621
PT401
PT4215
MCE255
PT4147
UC-5347
PT4015
PT411
SPRAGUE
PART No.
6TM-P1
MS-21
MS-21
4TM-S1
5HK-2D1
5HK-S1
5GA-T1
MS-31
6TM-O1
6TM-D1
2TM-P1
MS-37
4TM-D15
MS-21
4TM-S47
5GA-Q47
2TM-P15
2TM-S1
NOTES
Nole 6
CONTROLS
ITEM
No.
RIA
B
C
R2A
B
R3A
B
R4A
B
R5A
B
R6A
B
R7A
B
R8
R9
R10A
B
RATING
RESIST-
ANCE
IMeg
Shaft
Switch
7. SMeg
Shaft
lOMeg
with IMeg
stop
Shaft
200KO
Shaft
75KO
Shaft
25000
Shaft
15KO
Shaft
50000
6000
4.5Meg
Shaft
WATTS
1
1
i
J
1
i
4
1
z
REPLACEMENT DATA
ZENITH
PART No.
63-3199
Not Req.
Not Req.
63-2919
Not Req.
63-2946
Not Req.
63-2837
Not Req.
63-2896
Not Req.
63-2971
Not Req.
63-2976
Not Req.
63-3201
63-3167
63-3208
Not Req.
IRC
PART No.
Q13-137
Not Req.
76-1
Qll-142
RQ
Qll-143
RQ
Qll-129
Not Req.
Qll-125
NotHeq.
Qll-112
RQ
Qll-119
RQ
Qll-141
Not Req.
CLAROSTAT
PART No.
A47-lMeg-Z
KSS-3
SWE-12
A47-7. 5Meg-S
FKS-1/4
A47-10Meg-S
FKS-1/4
A47-200K-S
KSS-3
A47-75K-S
KSS-3
A47-3000-S
FKS-1/4
A47-15K-S
FKS-1/4
39-600
A47-5Meg-S
FKS-1/4
CENTRALAB
PART No.
AB-70
AK-4
KB-1
AB-98
AK-1
AB-98
AK-1
AB-46
AK-4
AB-35
AK-1
AB-7
AK-1
AB-20
AK-1
SUP-999
AB-87
AK-1
MALLORY
PART No.
U-53
Not Req.
U-26
U-82
Not Req.
U-826
Not Req.
U-430
Not Req.
U-41
Not Req.
SU-8
Not Req.
SU-29
Not Req.
M5MPK
SU-67
Not Req.
INSTALLATION NOTES
Volume
Attach to RIA
Attach to RIA
Focus
Attach toR2A
Height - Note
Attach toR3A
Brightness
Attach toR4A
Vert.Hold
Attach to R5A
Vert. Linearity
Attach to R6A
AGC
Attach toR7A
Contrast -wire wound
Buzz - wire wound
Fringe lock
Attach to R10A
Note.Connect a IMeg resistor in series with right hand termi
of control andthe lead connecting to same terminal orthe
original control (control viewedfromshaft end terminals dow
RESISTORS
ITEM
No.
Rll
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
S28
R29
R30
R31
R32
R33
R34
R35
R36
R37
R38
R39
R40
R41
RATING
OHMS
47KO
470KS!
27KO
47O
100KO
100KO
2200
47000
4700
68KO
100KO
82KO
22000
2200!!
10KO
22KO
680
560
1800
4700
27KO
68000
120KO
150
12KO
120KO
4700
2700 5%
1500
82000
5KO
WATT
i
3
I
~
2
z
L
2
|
^
k
I
2
i
2
J
z
i
i
2
2
\
|
5
I
i
§
2
s
REPLACEMENT DATA
ZENITH
PART No.
63-1856
63-1897
63-1845
63-1729
63-1869
63-1869
63-1758
63-1813
63-1772
63-1862
63-1869
63-1866
63-1799
63-1799
63-3170
63-1729
63-1737
63-1733
63-1754
63-1772
63-1841
63-1821
63-1873
63-1708
63-1827
63-1873
63-1772
63-1760
63-1750
63-1101
63-1834
IRC
PART No.
BTS-47K
BTS-470K
BTS-27K
BTS-47
BTS-100K
BTS-100K
BTS-220
BTS-4700
BTS-470
BTS-68K
BTS-100K
BTS-82K
BTS-2200
BTS-2200
BTB-10K
BTS-22K
BTS-68
BTS-56
BTS-1 80
BTS-470
BTS-27K
BTS-6800
BTS-120K
BTS-15
BTS-12K
BTS-120K
BTS-470
BTS-270
BTS-150
BTB-8200
BTS-15K
NOTES
Note 1
Note 2
ITEM
No.
R42
R43
R44
R45
R46
R47
R48
R49
R50
R51
R52
R53
R54
R55
R56
R57
R58
R59
R60
R61
R62
R63
R64
R65
R66
R67
R68
R69
R70
R71
R72
RATING
OHMS
150
22K«
IOOKO
100KO
33KO
47KO
10 MeK
6800
220KO
39000
180K1J
220KO
220KO
680KO
2. 2Meg
IOOKO
10KO
22KO
680O
680KQ
6. SMeg
6800
22KO
470O
470KO
100KO
470KO
56KS!
220KO
47KO
22KO
WATT
-
2
f
f
^
REPLACEMENT DATA
ZENITH
PART No.
63-1708
63-942
63-1869
63-1869
63-1848
63-1855
63-1961
63-2290
63-1884
63-1810
63-2313
63-1884
63-1884
63-1904
63-1926
63-1870
63-1827
63-2141
63-1779
63-1904
63-1947
63-2290
63-1842
63-1771
63-1897
63-1869
63-1897
63-1859
63-1883
63-1855
63-1841
IRC
PART No.
BTS-15
BTB-22K
BTS-100K
BTS-100K
BTS-33K
BTS-47K
BTS-10 Meg
BTA-680
BTS-220K
BTS-3900
BTA-180K
BTS-220K
BTS-220K
BTS-680K
BTS-2. 2Meg
BTS-100K
BTS-10K
BTB-22K
BTS-680
BTS-680K
BTS-6. SMeg
BTA-680
BTS-22K
BTS-470
BTS-470K
BTS-100K
BTS-470K
BTS-56K
BTS-220K
BTS-47K
BTS-22K
NOTES
Note 3
Note 4
Note 5
ITEM
No.
R73
R74
H75
R76
R77
R78
H79
R80
RBI
R82
R83
R84
R85
R86
RATING
OHMS
100KB
loon
I. 8Meg
IOOKO
10000
5600
5600
1 Meg
1 Meg
1 Meg
27KO
1000
4700
47KO
WATT
REPLACEMENT DATA
ZENITH
PART No.
63-1869
63-1744
63-1922
63-1870
63-965
63-1775
63-1775
63-19U
63-1911
63-1911
63-1845
63-1744
63-1771
63-1194
IRC
PART No.
BTS-100K
BTS-100
BTS-1. BMeg
BTS-100K
BTA-1000
BTS-560
BTS-560
BTS-1 Meg
BTS-1 Meg
BTS-1 Meg
BTS-27K
BTS-100
BTS-470
BTA-47K
NOTES
Note 1. Some versions mayuse 22KS
Note 2. Some versions mayuse 10KS
Note 3. Some versions mayuse 15KS
Note 4.Not used inall versions.
Note 5.Add this resistor for combir
TRANSFORMEF
ITEM
No.
Tl
RATING
PRI
117VAC
®1.6A
SEC. 3
12.6VCT
<a)4.4A
SEC. 1
524VCT
.250ADC
SEC. 4
SEC. 2
5VAC
(a) 3 A
SEC. 5
ZENITH
PART No.
95-1375
PART No.
Q) Use only one5V winding.
© Series 6.3Vwindings for 12.6VCT.
(g) Use universal mounting brackets.
TRANSFORMERS (SV
ITEM
No.
T2
T3
T4A
B
USE
Horlz. Output Trans.
Vert. Output Trans.
Yoke-Horiz. (13MH)
Vert. (42MH)
ZENITH
PART No.
S-20993 0)
95-1377
95-1378
S-I9898 ©
PART No.
A-8148
DY-9A ®
CD Winding and terminal assembly part #3-21078.
© Centeringdevice and yoke cover.
® Use original yoke cover and positioning device.
@ See instruction sheet packed with unit for replacement proced
(§) Connect as auto transformer.
(§) Drill onenew mounting hole.
TRANSFORMER (Al
ITEM
No
T5
IMPEDANCE
PRI.
9. 4KO
SEC.
4.20
REPLACEMEN
ZENITH
PART No.
95-1379
PART No.
A-3879
Merit
PART No.
A-2932
DAT
Tri
PAR!
S-5
SPEAKI
ITEM
No.
SP1
RATINGS
SIZE
4"
5 1/4"
10"
FIELD
PM
PM
PM
V.C. IMP.
4.20
4.20
4.20
REPLACEMENT DAT/
ZENITH
PART No.
49-750
49-751 ©
49-752 @
VIKING
PART No.
4J6
525J4
10J11
COILS (R
ITEM
No.
LI
L2
L3
L4
L5
L6
L7A
B
C
D
E
F
G
USE
Series Police
Trap
Shunt Police
Trap
Series Police
Trap
Series Police
Trap
Shunt Police
Trap
Series Police
Trap
Ant. , RF
Grid Coil
Ant. , RF
Grid Coil
Ant. , RF
GridColl
Ant., RF
GridCoil
Ant., RF
GridCoil
Ant. , RF
GridCoil
Ant. , RF
Grid Coil
DC RES.
PRI.
00
00
00
00
00
00
00
on
00
oo
00
00
oo
SEC.
REPLA
ZENITH
PART No.
20-490
20-505
20-490
20-490
20-505
20-490
S-21192
S-21193
S-21194
S -21195
S -21196
S-19847
S-19848
MEISSI-
PART t
PAGE 16

PARTS LIST AND DESCRIPTIONS (Continued)
RESISTORS (cont)
LLORY
(TNo.
1
-255
-255
1
-521
11
31
235
1
1
II
215
3255
147
5347
015
11
SPRAGUE
PART No.
6TM-P1
MS-21
MS-21
4TM-S1
5HK-2D1
5HK-S1
5GA-T1
MS-31
6TM-D1
6TM-D1
2TM-P1
MS-37
4TM-D15
MS-21
4TM-S47
5GA-Q47
2TM-P15
2TM-S1
NOTES
Note 6
INSTALLATION NOTES
Volume
Attach to R1A
Attach to R1A
Focus
Attach to R2A
Height - Note
Attach toR3A
Brightness
Attach toR4A
Vert. Hold
Attach to R5A
Vert. Linearity
Attach to R6A
AGC
Attach to R7A
Contrast -wire wound
Buzz - wire wound
Fringe lock
Attach to RIGA
ACEMENT DATA
TH
No.
IRC
PART No.
BTS-1 5
BTB-22K
BTS-100K
BTS-100K
BTS-33K
BTS-47K
BTS-10 Mec
BTA-680
BTS-220K
BTS-3900
BTA-180K
BTS-220K
BTS-220K
BTS-680K
BT3-2. 2Meg
BTS-100K
BTS-10K
BTB-22K
BTS-680
BTS-680K
BTS-6. 8Meg
BTA-680
BTS-22K
BTS-470
BTS-470K
BTS-100K
BTS-470K
BTS-56K
BTS-220K
BTS-47K
BTS-22K
NOTES
Note 3
Note 4
Note 5
ITEM
No.
R73
H74
H75
R76
R77
R78
R79
R80
R81
RB2
R83
R84
R85
R86
RATING
OHMS
IOOKQ
100 Si
1. 8Meg
lOOKn
looon
560n
5600
IMeg
IMeg
1 Meg
27Kn
loon
470n
47Kn
WATT
2
2
2
B
I
1
2
1
|
2
2
2
I
I
J
REPLACEMENT DATA
ZENITH
PART No.
63-1869
63-1744
63-1922
63-1870
63-965
63-1775
63-1775
63-1911
63-1911
63-1911
63-1845
63-1744
63-1771
63-1194
IRC
PART No.
BTS-100K
BTS-100
BTS-I. 8Meg
BTS-100K
BTA-1000
BTS-560
BTS-560
BTS-1 Meg
BTS-1 Meg
BTS-1 Meg
BTS-27K
BTS-100
BTS-470
BTA-47K
NOTES
ITEM
No.
R87
R88
R89
R90
R91
R92
R93
R94
R95
R96
H97
R98
R99
R100
RATING
OHMS
22Kn
lOKn
47Kn
isosn
eeoon
9in 5%
470KH
i2Kn
22Kn
33Kn
lOOKn
330n
IOKH
8. 2n
WATT
2
2
1
1
L
J.
2
2
1
1
1
1
^
i
REPLACEMENT DATA
ZENITH
PART No.
63-1842
63-2145
63-1856
63-2313
63-1820
63-1744
63-1898
63-1091
63-958
63-1849
63-1870
63-3162
IRC
PART No.
BTS-22K
BTB-10K
BTS-47K
BTA-I80K
BTS-6800
BTS-91
BTS-470K
BTB-12K
BTA-22K
BTA-33K
BTA-100K
BT.A-330
BTS-10K
NOTES
Note 4
Note 4
Note 4
Note 1. Some versions mayuse 22KS7 resistor in this application.
Note 2. Some versions mayuse IOKS2 resistor in this application.
Note 3. Some versions mayuse 15KS2 resistor in this application.
Note 4.Not used inall versions.
Note 5.Add this resistor for combination units only.
TRANSFORMER (POWER)
ITEM
No.
Tl
RATING
PRI
117VAC
@1.6A
SEC. 3
12.6VCT
&J4.4A
SEC. 1
524VCT
.250ADC
SEC. 4
SEC. 2
5VAC
®3A
SEC. 5
REPLACEMENT DATA
ZENITH
PART No.
95-1375
Stancor
PART No.
Meril
PART No.
Triad
PART N->
RCA
TYPE No.
PART No. PART No.
26R33
0)®)®
QUse only one5V winding.
© Series 6.3V windings for 12.6VCT.
(3) Use universal mounting brackets.
TRANSFORMERS (SWEEP CIRCUITS)
ITEM
No.
T2
T3
T4A
B
USE
Horiz.Output Trans.
Vert. Output Trans.
Yoke-Horiz. (13MH)
Vert. (42MH)
REPLACEMENT DATA
ZENITH
PART No.
S-20993 (B
95-1377
95-1378
S-19898 ©
PART No.
A-8148
DY-9A ®
Meril
PART No.
MDF-72®
Triad
PART No.
DA-36 ®
A-108X®
Y-17-1®
RCA
TYPE No.
211D2 ®
Halldorson
PART No.
DF602 ®
PART No.
Y-7 ®
CD Winding and terminal assembly part #S-21078.
enterng evice anyoe cover.
Use original yoke cover and positioning device.
®See instruction sheet packed with unit for replacement procedure,
© Connect as auto transformer.
(§) Drill onenew mounting hole.
TRANSFORMER (AUDIO OUTPUT)
ITEM
No.
T5
IMPEDANCE
PRI.
9. 4Kn
SEC.
4. 2n
REPLACEMENT DATA
ZENITH
PART No.
95-1379
PART No.
A-3879
Merit
PART No.
A-2932
Triad
PART No.
S-51X
PART No.
Z1117
PART No.
24S60
NOTES
SPEAKER
ITEM
No.
SPl
RATINGS
SIZE
4"
5 1/4"
10"
FIELD
PM
PM
PM
V. C IMP.
4. 2n
4. 2il
4.2SJ
REPLACEMENT DATA
ZENITH
PART No.
49-750
49-751 (D
49-752 ®
VIKING
PART No.
4J6
525J4
10J11
QUAM
PART No.
4A07
52A1
IOA3I
NOTES
(D Used in ModelsM2228RZ,
M2229RZ, and M2229EZ
(2) Used in ModelsM2250RZ,M2250EZ,
M2250RU, M2250EU,M2252RZ, and M2252EZ
COILS (RF-IF)
ITEM
No.
LI
L2
L3
L4
L5
L6
L7A
B
C
D
E
F
G
USE
Series Police
Trap
Shunt Police
Trap
Series Police
Trap
Series Police
Trap
Shunt Police
Trap
Series Police
Trap
Ant, , RF
Grd Coil
An . , RF
Grd Coil
An . , RF
Grd Coil
An . , RF
Grd Coil
An . , RF
GridCoil
Ant, RF
Grid Coil
Ant, RF
Grid Coil
DC
PRI.
on
on
on
on
on
on
on
on
on
on
on
on
on
RES.
SEC.
ZENITH
PART No.
20-490
20-505
20-490
20-490
20-505
20-490
S-21192
S-21193
S-21194
S-21195
S-2I196
S-19847
S-19848
REPLACEMEN
MEISSNER
PART No.
T DATA
MERIT
PART No.
MILLER
PART No.
NOTES
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
ITEM
No.
H
I
J
K
L
L8
L9
L10
L11A
B
C
D
E
F
G
H
I
J
K
L
L12
L13
L14
L15
L16
L17
LIB
L19
L20
L21
L22
L23
L24
L25
L26
L27
L28
L29
L30
LSI
USE
Ant. , RF
Grid Coil
Anl. , RF
Grid Coil
Ant. , RF
GridCoil
Ant , RF
Grid Coil
Ant , RF
Grid Coil
Fil. Choke
Nnut Coll
RF Coil
RF, Mixer
Grid, Osc.
Coll
RF, Mixer
Grid, Osc.
Coil
RF, Mixer
Gr id, Osc.
Coil
RF, Mixer
Grid, Osc.
Coil
RF, Mixer
Grid, Osc.
Coil
RF, Mixer
Grid, Osc.
Coil
RF, Mixer
Grid, Osc.
Coil
HF, Mixer
Grid, Osc.
Coil
RF, Mixer
Grid, Osc.
Coil
HF, Mixer
Grid, Osc.
Coll
RF, Mixer
Grid,Osc.
Coil
RF, Mixer
Grid , Osc.
Coil
Mixer Grid
Coil
Mixer Coll
Osc. Trimmg
Coil
IF Coil
Conv. Plate
1st Video IF
Adj. Sound IF
39. 75MCTrap
2nd Video IF
3rd Video IF
4th Video IF
Series Peak-
ing Coil
Shunt Peak-
ing Coll
Series Peak-
ing Coil
4. 5MC Trap
Series Peak-
ing Coil
Sound IF
Quadrature
Coll
Horiz. Osc.
Anti-ringing
DC RES.
PRI.
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
on
.in
.in
on
.in
.in
.an
5. sn
5. sn
1.5(1
I2n
sn
.sn
4. en
i48n
47n
SEC.
.in
.in
.2ft
I. 2ft
.sn
'Use trap winding and drill mounting
* Detune trap.
* Series with a 5. 6KS2 resistor.
t Parallel with a 5. 6KS1 resistor.
* Parallel with a .01 capacitor.
ITEM
No.
~L32~
RATINGS
TOTAL
DIRECT
CURRENT
.250ADC
D. C.
RESISTANCE
sen
INDUC
(o a
ioa
i.'
Q) Drill one new mounting hole .