Philco 2C4O16 User manual

PHOTO FACT* Folder
PHILCOMODELS 22C4O16, L, 22C4124, L,
22C4126, L, 22C4129, 22C4312, L (Ch.35O)
VOLUME
CONTROL
ON-OFF
SWITCH
VERTA RANGE
HOLD \SWITCH
CONTROL
BRIGHTNESS HORIZ.
CONTROLHOLD
CONTROL
PHILCO MODEL 22C4016
FINE
TUNING
CHANNEL
SELECTOR
TRADE NAME Philco MODELS CHASSIS
22C4016, 22C4016L, 22C4124,
22C4124L, 22C4126, 22C4126L,
22C4129, 22C4312, 22C4312L 350
MANUFACTURER Philco Corp., Tioga & "C" Sts., Philadelphia, Pa.
TYPE SET Television Receiver
TUBES Twenty
POWER SUPPLY 110-120Volts AC-60 Cycles RATING 1.5 Amp. ® 117 Volts AC
TUNING RANGE Channels 2 thru 13, Video IF 45.75MC, Sound IF 41.25MC (Intercarrler)
INDEX
Alignment Instructions 6,7
Drive Cord Stringing 16
Disassembly Instructions 18
Horizontal SweepCircuit Adjustments 11
Parts List and Descriptions 13 thru 16
Photographs
Cabinet-Rear View 11
Capacitor Identification 4,9
Chassis-Top View i 3
RF Tuner 10
Photographs (Cont)
Resistor Identification 19, 20
Trans., Inductor & Alignment Identification ... .17
Resistance Measurements 8
Servicing inthe Field 18
Schematic 2
TroubleShooting Aids 12, 17
Tube Failure Check Chart 5
Tube PlacementChart (Bottom View) 8
Tube PlacementChart(Top View) 5
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HOWARD W. SAMS & CO.,INC. • Indianapolis 5, Indiana
"Thelisting ofany available replacementparthereindoes not constitute inany
case a recommendation,warranty or guaranty by Howard W. Sams & Co.,Inc.,
as tothe quality and suitability of such replacementpart. The numbers of these
parts have beencompiled from informationfurnished to Howard W. Sams & Co.,
Inc., by the manufacturers of the particulartype of replacementpart listed."
"Reproduction or use,without express permission, of editorial or pictorial con-
tent, inany manner, is prohibited. No patent liability is assumed with respect to
the useofthe informationcontainedherein.Copyright1955 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 5-55 SET 278 FOLDER 8

©
r DENOTES CHASSISGROUND
A PHOTOFACT STANDARD NOTATION SCHEMATIC
©Ho-.rd W. S.m,4 Co., Inc. T955

PHILCOMODELS 22C4O16, L, 22C4124, L,
22C4126,L, 22C4129, 22C4312, L (Ch.35O)
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SET278 FOLDER 8
PAGE 3

PAGE 4

CHASSIS BOTTOM VIEW-CAPACITOR IDENTIFICATION
(OSC *
'i '9iofrDr,t siaaow cmmd

TUBE PLACEMENT CHART
TOP VIEW
L3:
VIDEO OUTPUT 8
8
L34
INDICATESBLANK PINOR LOCATING KEV ON TUBE SOCKET x
SI
L38
S
L22
IN64P
VIDEO DET
2ND VIDEO IF
SOUND IFAMP
L29
S
1.30
S
3RD VIDEO IF QL3I
AGC CLAMPER
UAL
*—
RATIO DET
AUDIO OUTPUT
fVI2\
> ~
VERT MULT
HORIZ AFC
L40
/VI5\Z MULT
IO
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TUBE FAILURE CHECK CHART
to
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The following chart lists tubeswhose failures are most likely to produce the indicated symptoms.
Refer to tubeplacement chart for location and type of tube.
POWER SUPPLYFAILURE
No raster, no sound - V19, Fuse (Ml)
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, V20
Has pic, no sound - V7,V8,V9, V10
Overloadedpicture - V9
SYNC FAILURE
No vert, sync - Vll, V12 .
No horiz. sync - Vll, V14, V15
No vert, or horiz. sync -Vll
SWEEPFAILURE
No raster, has sound - V15, V16, V17,V18, V20
No vertical deflection - V12, V13
poor vert, linearity or foldover - V12, V13
Poor horiz. linearity or foldover - V15, V16, V17
Narrowpicture - V15, V16, V17, V18, V19
Vert, off freq. - Vll, V12
Horiz. off freq. - Vll, V14, V15
SET 278 FOLDER 8
PAGE 5

ALIGNMENT INSTRUCTIONS
1.
2.
3.
4.
5.
6.
7.
8.
9.
8.
9.
10
Allow 15 minutes lor receiver and test equipment to warm up. There must bea good bond between chassis and test equipment.
Connect the deflection yoke and speaker during alignment.
Do not remove the horizontal oscillator tube (V15) to disable the high voltage. The high voltagelead should be securely taped and keptaway from the
chassis. TheIF shield must be In place.
VIDEO IF ALIGNMENT
Setthe contrast and brightness control fully counter clockwise.
Connect the negativelead ofa 14 voltbatterythru 10KO to point <Q> . Positivelead to chassis.
Set the channel selector to channel 4 position.
Attenuate generator during alignment for4 volts peak to peak output at point <^> .
Connect the synchronized sweep voltage from the sweepgenerator tothe horizontal Input ofthe oscilloscope for horizontal deflection.
DUMMY
ANTENNA
Direct
"
"
"
Flg.l
SWEEP
GENERATOR
COUPLING
Marker to point <g> .
Low side to chassis.
"
"
Acrossantenna Input thru
matching network, (Fig.l)
SWEEP
GENERATOR
FREQUENCY
Not used.
"
11
"
"
69MC
(6MC Swp)
SOUND
MARKER
GENERATOR
FREQUENCY
47. 25MC
(40(A 30%
Mod)
4L2 SMC
45.4MC
43.OMC
42.7MC
44.4MC
67. 25MC
70. 25MC
CHANNEL
4
"
"
11
CONNECT
SCOPE
Vert amo. thru ISKfi
to point <^ . Low
side to chassis.
"
'
: ALIGNMENTUSING AM SIGNAL C
ADJUST
Al
A2
A3,A4
A5
A6
A7
7ENERATOR ANDVTV
REMARKS
Adjust for MINIMUM 4(XH Indication on
scope.
"
Adjust for maximum 400^ Indication on
scope.
"
"
Set line tuning control at Its mid-range
position. Check responsecurve similar to
Fig. 2for curve limits. If necessary, re-
adjust A3 thru A7for response curvelimits
as In Fig. 2. Adjust A3 and A4 for proper
curye level. Adjust A7to levelcurve top.
Adjust A6for proper slope of curve onlow
frequency side. Readjustadjustments
SLIGHTLY. If unable to obtainproper re-
sponse curve,repeat steps 3 thru 7.Donot
reset AlandA2.
*rt
Connect two matched 100KS2 (±1%) resistors In series from point <^> to chassis. The junction of these two resistors Is alignment point <§> as shown
on the schematic.
Remove 6DE6 (V3, 1st video IF tube) from Its socket
Set the volume control for normal volume.
DUMMY
ANTENNA
2200S1
carbon
resistor
SIGNAL
GENERATOR
COUPLING
High side to point <§> .
Low side to chassis.
SIGNAL
GENERATOR
FREQUENCY
4. SMC
(Unmod)
CHANNEL
Any
CONNECT
VTVM
DC probe to point <§> .
Common to chassis.
DC probe to point <E> .
Common to point <$p .
SOUND IF ALIGNMENTUSING FM SIGNAL GENERA!
ADJUST
A 8,
A9
A10
REMARKS
Adjust for maximum deflection.
Adjust for zeroreading. A positive and negativereading
will be obtained on either side ofthe correct setting.
Replace V3 In Its socket
OR AND OSCILLOSCOPE
Remove 6DE6 (V3, 1st video IF tube) from Its socket
Use frequency modulated signal with 60% modulation and 450KC sweep. Use 120^ sawtoothvoltage In scope for horizontal deflection.
DUMMY
ANTENNA
2200S2
carbon
resistors
DUMMY
ANTENNA
2200SJ
carbon
resistor
SWEEP
GENERATOR
COUPLING
High side to point <§> .
Low side to chassis.
SIGNAL
GENERATOR
COUPLING
High side to point <^> .
Low side to chassis.
SWEEP
GENERATOR
FREQUENCY
4. SMC
(450KC Swp)
MARKER
GENERATOR
FREQUENCY
4. SMC
CHANNEL
Any
4.5MC TRAP ALIG
SIGNAL
GENERATOR
FREQUENCY
4. SMC
(Unmod)
CHANNEL
Any
CONNECT
SCOPE
Vert amp. to point
<§> . Low side to
chassis.
Vert amp. to point
<^p . Low side to
chassis.
vIMENT
CONNECT
VTVM
DC probe to pin 11
cathode) of picture
tube. Common to
chassis.
ADJUST
AS,
A9
A10
REMARKS
Disconnect stabilizing capacitor C3. Increase
generator output for reading on scope. Adjust
for curve of maximum amplitude and
symmetry similar to Fig. 3
Reconnect stabilizing capacitor C3. Increase
generator output for reading on scope. Ad-
just so that 4. SMC occurs at crossover
lines as shown In Fig. 4. SLIGHTLY readjust
A9 for maximum amplitude and stralghtness
of crossover lines. Replace V3 In Its
socket
ADJUST
All
REMARKS
Remove V3 from Its socket Adjust for MINIMUM
deflection. Replace V3 In its socket
LTEHNATE 4. SMC TRAP ADJUSTI ENT
Tune In a TV station and turn the fine tuning controlclockwise until a 4. SMC beatpattern appears In picture. Adjust Allfor minimum 4. SMC beat
In picture.
SIGNAL
GENERATOR
OUTPUT
75^.
150
FIG.2
FIG.3
FIG.4
PAGE 6

ALIGNMENT INSTRUCTIONS (cont)
OSCILLATOR ALIGNMENT
Disconnect white lead going to tuner AGC from main chassis. Connectnegativelead ofa 1.5 volt battery to loose end. Positive lead to chassis.
Set the fine tuning control at Its mid-range position.
Connect the synchronized sweep voltage from the sweepgenerator tothe horizontal Input ofthe oscilloscope for horizontal deflection.
The sweepgenerator output lead should be terminated with Its characteristic impedance,usually 50 ohms.
DUMMY
ANTENNA
Two 120SJ
carbon
resistors
"
"
SWEEP
GENERATOR
COUPLING
Across antenna termi-
nals with 12012 in each
lead.
11
SWEEP
GENERATOR
FREQUENCY
Not used.
"
"
MARKER
GENERATOR
FREQUENCY
257MC
251MC
245MC
239MC
233MC
227MC
221MC
129MC
113MC
101MC
CHANNEL
13
12
11
10
9
8
7
6
4
2
CONNECT
SCOPE
Vert amp. thru IJKfi
to point <g> . Low
side to tuner chassis.
"
ADJUST
A12
A13
A14
A15
A16
A17
A18
A19
A20
REMARKS
Adjust for zero beat on scope. If regener-
ation occurs, Increase bias to3 volts
If necessary.
Adjust A16for channel 9 frequency.Then
recheck A16for channel 8 frequency. Re-
check A16for channel 9.If necessary, make
compromisebetweenchannel 8 and 9 for
zero beat on scope.
Adjust A17/for zero beat on scope. Recheck
steps 11,12and13.If necessary, readjust
untilchannels are within 500KC of their
properfrequencies.
Adjust for zero beat on scope.
"
"
RFAND /nXER ALIGNMENT
Connect bias as in "Oscillator Alignment".Disconnecttunercouplinglink attheIF terminal strip near V3and solder a 68S2 resistor tothe open end
of the lead from the tuner. Remove V3 from Its socket Adjust scope controls so that the width Is double the height
Connect the synchronized sweepvoltage from the sweep generator tothe horizontal input ofthe oscilloscope for horizontal deflection.
The sweep generator output lead should be terminated with Its characteristic Impedance,usually 50 ohma
DUMMY
ANTENNA
Fig. 1.
SWEEP
GENERATOR
COUP1ING
Across antenna termi-
nals thru antenna match-
Ing network. (Fig. 1)
SWEEP
GENERATOR
FREQUENCY
213MC
(10MC Swp)
177MC
(10 MC Swp)
8 SMC
(10MC Swp)
44MC
(10MCSwp)
MARKER
GENERATOR
FREQUENCY
213MC
177MC
85MC
44MC
CHANNEL
IS
7
6
UHF
position
CONNECT
SCOPE
Vert amn.thni IKfi
to point ^> . Low
side to tuner chassis.
ADJUST
A21,
A22
A23,
A24
A25,
A26,
A27
A25,
A26,
A27
REMARKS
Check for response similar to Fig. 5.If
response isnot flat between limits shown,
detune A22 counterclockwiseuntil single
peak appears. Adjust A21 until peak falls on
213MC marker. Adjust A22for response
similar to Fig. 5.
Check for response Indicated by dotted lines
In Fig. 6Aand6B.If necessary, adjust for ,
mirror image of original response curve.
(Tilt In opposite direction.) If response curve
appears as in Fig. 6A, adjust A23andA24
untilcurve appears asin Fig. 6B. This adjusi
ment over compensates to allow for channel
13 adjustment.Repeat steps 17and18 until
centered and symmetrical response curves
are obtained on channels 7 and13.
Adjust for symmetrical response approxi-
mately center of bandpass. Adjust A26
counter clockwise until single peak appears.
Adjust A25 untilpeak falls on 85MC marker.
Adjust A27for maximum curveamplitude
and symmetry of single peak. Retouch
SLIGHTLY , if necessary, A25andA26for
symmetrical response centered at approxi-
mately the 85MC markerpoint similar to
Fig. 5.
Check response curve for symmetrical
responsecentered at approximately 44MC.
If necessary, retouch SLIGHTLY A25,A26
and A27for symmetrical responsecentered
at approximately the 44MC marker point
Repeatstep 19tobe sure channel 6 (85MC)
Is withinproper limits on response curve
similar to Flic. 5.
VIDEO PEAKINU COIL ADJUSTMENT
In cases of excessiveovershooting or smear on some stations, It maybe necessary to adjustA28.Alignment ofthe tuner and IF portions ofthe
receiver must be correct before this adjustment Is made. Proper adjustment ofA28 Is the point of minimum smear and trailing whites.After
adjusting A28onone channel,checkotherchannels to make certain picture quality hasnot beenaffected.
K»
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or
FIG.5
.ACTUAL'
TCSPONSE
FIG. 6A
FIG. 6B
PAGE 7