Philco PHOTOFACT 49-1150 User manual

PHOTOFACT* Fold er
PHILCO
MODELS 49-1150, 49-1175
TONE CONTROL
ON-OFF SWITCH
TUNING CONTROL
PHONO
BAND SWITCH
VOLUME CONTROL
VOLUMECONTROL
ON-OFF SWITCH
CONTRAST
CONTROLBRIGHTNESS
-CHANNEL
SELECTOR
PHILCO MODEL 49-1175
TRADE NAMEPhilco,Models 49-1150, 49-1175
MANUFACTURERPhilcoCorp.,Tioga & "C" Streets,Philadelphia, Pa.
TYPE SET Model 49-1150 TV only.Model 49-1175 AM-FM-Phono-TV
TUBES Twenty Five-Model 49-1150
ThirtyTwo-Model 49-1175
POWERSUPPLY 110-120 Volts AC
TUNING RANGE TV Channels 2 thru 13
AM 540-1620KC
FM 88-108MC •
RATING: (TV) 2.0 Amp. © 117 Volts AC
(Radio) .55 Amp. ® 117 Volts AC
INDEX
Alignment Instructions 6,7
Block Diagram 13
DisassemblyInstructions 20
HorizontalHold Adjustments 27
Parts List & Description 21,22,23,24,25
Photographs
Cabinet-Rear View 20
Capacitor Identification (Radio) 16
Capacitor Identification (TV) 11,18
Chassis-Top View (Radio) 14
Photographs(continued)
Chassis-Top View (TV) 3
RF Tuner 10
Resistor Identification (Radio) 15
Resistor Identification (TV) 12,17
Trans., Inductor & Alignment
Identification 4,9
Schematic (TV) 2
Schematic (Radio) 19,26
Tube PlacementChart 5
Voltage and ResistanceMeasurements 8
HOWARD W. SAMS & CO., INC. • Indianapolis 7, Indiana
"Thelisting ofany available replacement part hereindoes not consthX'e inany
ca:e a recommendation, warranty or guaranty by Howard W. Sams & Co., Inc.,
as tothe quality and suitability of such replacement part. The numbers of these
partshave been compiled from information furnished to Howard W. Sams & Co.,
Inc., bythe manufacturers ofthe particular type of replacement part listed."
"Reproduction or use, withoutexpresspermission, of editorial or pictorial con-
tent, m any manner, is prohibited. No patent liability is assumedwithrespect to
the useof the information containedherein.Copyright 1949 by Howard W.
Sams & Co.,Inc.,Indianapolis 7, Indiana, U.S.of America.Copyrightunder In-
ternational CopyrightUnion. All rights reserved underInter-AmericanCopyright
Union (1910) by Howard W. Sams & Co.,Inc."Printed inU.S.of America
DATE 9/494918-6 SET #70 FOLDER 6
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A PHOTOFACTSTANDARD NOTATION SCHEMATIC
©Howord W. Sams & Co.,Inc.1949
PAGE 2

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PAGE 4

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JCTOR AND ALIGNMENT IDENTIFICATION
PAGE 9

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TUBE PLACEMENTCHART
PAGE 5

TV ALIGNMENT INSTRUCTIONS
ALIGNMENT INSTRUCTIONS— READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
Turn the AVC switch tothe "off" position andsetthe contrast control at approximately 3/4ofits rotation inthe
clockwise direction. '
Pull the horizontal oscillator tube (7N7-V19) to eliminate the high voltage shock hazard during the alignment
procedure .
VIDEO IF ALIGNMENT
Remove the oscillator tube(6J6-V3) and remove the oscillator clip coil ofany channel from the turret and switch
the tuner to that channel.
Use an ungrounded tube shield over the mixertube asa means of injecting the signal.
Attenuate the signal generator soasnotto exceed 2 volts onthe VTVM.
DUMMY
ANTENNA
Tube
Shield
Tube
Shield
Tube
Shield
Tube
Shield
Tube
Shield
Tube
Shield
Tube
Shield
DUMMY
ANTENNA
Tube
Shield
DUMMY
ANTENNA
Tube
Shield
Tube
Shield
SIGNAL
GENERATOR
COUPLING
High side toun-
grounded tube
shield overmixer
tube (V2). Low side
to chassis.
"
"
»
•
»
"
SWEEP
GENERATOR
COUPLING
High side toun-
grounded tube
shield overmixer
tube (V2) . Low side
to chassis.
SWEEP
GENERATOR
COUPLING
High side toun-
grounded tube
shield overmixer
tube (V2) . Low side
to chassis.
SIGNAL
GENERATOR
FREQUENCY
22 . IMC
(Unmod. )
24.9MC
(Unmod. )
28 . IMC
(Unmod. )
23.9MC
(Unmod.)
22. IMC
(Unmod.)
26. SMC
(Unmod . )
25. SMC
(Unmod.)
CHANNEL
Any
"
11
"
»
"
"
CONNECT
VTVM
DC Probe to Point
Ql Common to
chassis.
»
"
"
"
"
"
, OVERALL VIDEO IFR
SWEEP
GENERATOR
FREQUENCY
25MC
(10MC
Sweep)
MARKER
GENERATOR
FREQUENCY
22.. IMC
26.6MC
28. IMC
SOUND
SWEEP
GENERATOR
FREQUENCY
22. IMC
(IMC
Sweep)
MARKER
GENERATOR
FREQUENCY
22.1M3
CHANNEL
Any
F ALIGNM
CHANNEL
Any
ADJUST
Al
A2
A3
A4,A5
A6
A7
A8
:SPONSE CHECK
CONNECT
SCOPE
Vert . Amp . thru
10K2 resistor to
points) Low
side to chassis.
ENT
CONNECT
SCOPE
Vert. Amp. thru
10K2 resistor
to Polnt<H>. Low
side to chassis.
REMARKS
Adjust for minimum deflection.
Adjust for maximum deflection.
Adjust for minimum deflection.
Adjust for maximum deflection.
Adjust for minimum deflection.
Adjust for maximum deflection.
Adjust
ADJUST
A1.A2,
A3,A4,
A5.A6,
A7,A8,
A9
ADJUST
A10,A11
A18,A13
for maximum deflection.
REMARKS
Adjust for pattern and placement of
markers asperFig1.
REMARKS
Adjust for maximum indications.
Adjust A12for maximum amplitude
and straightness of diagonal line
going from peak to peak. Adjust
A13 so 22. IMC marker is located at
center of diagonal line asperFig
2. Replace oscillator tube(V3).
OSCILLATOR ALIGNMENT
The oscillator alignmentshould notbe attempted until the sound IF channel has been accurately aligned
The tuner of this receiver will receiver eight ofthe twelve available channels. The eight received will depend
upon the coils which areinthe tuner. Donot attempt to align a coll setforany channel other than that which it
is intended. The alignment outline below lists the sound carrier frequencies forall twelvechannels.
Disable theAFC systemduring the oscillator alignment by temporarily grounding Point C.
The oscillator coil slug adjustments are available through the hole inthe front panel ofthe chassis. As each
channel is switched in,the oscillator coil slug for that channel is in line with the hole In front ofthe chassis.
DUMMY
ANTENNA
Two 125S
carbon
res.
SIGNAL
GENERATOR
COUPLING
Acrosshighband
antenna terminals
with 1252 resistor
in each generator
lead.
Across low band
antenna terminals
with1252 resistor
in each generator
lead.
SIGNAL
GENERATOR
FREQUENCY
215.75MC
209.75MC
203.75MC
197.75MC
191.75M3
185.75MC
179.75MC
87.75MC
81.75MC
71.751*
65.75MC
59.75M3
CHANNEL
13
11
10
9
8
7
6
5
4
3
2
CONNECT
VTVM
f
Probe to Point
Common to
assis.
ADJUST
414
A15
A16
A17
A18
A 19
A20
A21
A22
A23
A24
A25
REMARKS
Adjust for zero reading. A positive and
negativereading will be obtained on either
side ofthe correct setting.
10
11
13,
FIG. I
FIG. 2
PAGE 6

RADIO ALIGNMENTINSTRUCTIONS
14
15
16
17
18
19
17
18
19
20
21
22
ALIGNMENT INSTRUCTIONS-READ CAREFULLYBEFORE ATTEMPTINGALIGNMENT
If alignment is tobe done on both FMand AM bands, the AM alignment should be done first.
Use Isolation transformer If available. Ifnot connect a .1MFD capacitor In series with low sloe of signal
generator andB-.
Volume control should beat maximum position. Output of signal generator should beno higher than necessary to
obtain an outputreading. Usean insulated alignmentscrewdriver for adjusting.
The calibration pointsshould be marked by pencil onthe dial bacKplate when the receiver Is removed from the
cabinet The referencepoint from which the measurements are made isthe left hand edje ofthe dial backplate.
Pointer setting withtuninggang closed 3 11/16", 1500KC-9 1/16", 1600KC-9 7/16", 92MC-5 5/16", and 105MC-8 7/16".
AM ALIGNMENT
DUMMY
ANTENNA
.1MFD
SIGNAL
GENERATOR
COUPLING
High side to terminal
#1of AM antennater-
minal strip. Low side
toB-.
Loop
Loop
SIGNAL
GENERATOR
FREQUENCY
455KC
1600KC
1500KC
BAND
SWITCH
POS.
AM
»
RADIO
DIAL
SETTING
540KC
1600KC
1500KC
OUTPUT
METER
Across ter-
minal 12 & |3
onAM antenna,
terminal strip
n
"
ADJUST
A26,
A27,
A28,
A29,
A30,
A31
A32
ASS
REMARKS
Adjust for maximum output. If
isolation transformer isnot used
reduce dummy antenna to .001MFD
to reduce hum modulation.
Do not repeat adjustments.
Fashion loop of several turns of
wire and radiate signal Into loop
of receiver. Adjust for maximum
output.
Adjust for maximum output.
FM IF ALIGNMENTUSING AM SIGNALGENERATOR AND VTVM
Connect two matched lOOKffl resistor (15%)in series from pin2 of 19T8 (V30) to chassis. The junction of these
resistors Is alignmentPoint E as shown onthe schematic.
DUMMY
ANTENNA
.1MFD
.1MFD
.1MFD
SIGNAL
GENERATOR
COUPLING
High side to pin 1
(Grid) of 6BJ6 (V28).
Low s ideto B-.
High side topin8
(Grid) of 7F8 (V26).
Low side toB-.
SIGNAL
GENERATOR
FREQUENCY
9. IMC
(Unmod. )
11
BAND
SWITCH
POS
FM
"
RADIO
DIAL
SETTING
88MC
11
FM IF ALIGNMENTUSING FM SIGNA
CONNECT
VTVM
DC ProJ^e to
Point<4)>. Com-
mon toB-.
it
DC Probe to
Point^> Com-
mon to Point
&
ADJUST
A34,
ASS,
A36
A37,
ASS
A39
REMARKS
Adjust for maximum deflection.
n n n t>
Adjust for zero reading. A positive
and negativereading will beob-
tained on either side ofthe
correct setting.
L GENERATOR AND OSCILLOSCOPE
Use frequencymodulated signal with 60% modulation and 450KC sweep. Use 120% sawtooth voltage in scope for
horizontaldeflection.
DUMMY
ANTENNA
.1MFD
.1MFD
.IMF'D
SIGNAL
GENERATOR
COUPLING
High side topin1
(Grid) of 6BJ6 (V28).
Low side toB-.
High side to pin 8
(Grid) of7F8 (V26).
Low side toB-.
SIGNAL
GENERATOR
FREQUENCY
9. IMC
(450KC
Sweep)
DUMMY
ANTENNA
Two 125fi
car D on
res.
11
SIGNAL
GENERATOR
COUPLING
Across pins 1 and4 of
FM antennasocketwith
125SS resistor in each
generator lead.
"
SIGNAL
GENERATOR
FREQUENCY
105MC
"
92MC
BAND
SWITCH
POS.
FM
ti
BAND
SWITCH
POS.
FM
"
RADIO
DIAL
SETTING
88MC
FMRF ALIGN
RADIO
DIAL
SETTING
105MC
"
92MC
CONNECT
SCOPE
Vert. Amp. to
Pointer* Low
side toB-.
Vert. Amp. to
Polnt<J> Low
side toB-.
ADJUST
A34,
A35,
A36
A37,
ASS
ASS
REMARKS
Disconnect stabilizer cap. (C12) .
Adjust for maximum amplitude and
symmetry asper Fig 3,
n
Reconnect stabilizer cap (C12).
Adjust so crossoverpointoccurs
at center of pattern asper Fig 4.
Slightly, retouch A34for maximum
amplitude and straightness of
crossover lines.
KENT
CONNECT
VTVM
DC Probe to
Point<TJ> Com-
mon toB-.
"
ADJUST
A40
A41,
A42
L40,
L37,
L35
REMARKS
Adjust for maximum deflection.
Rock tuning gang and adjust for
maximum deflection.
Expand or compress the coil turns,
which ever is necessary, until the
Insertion of either endofa tuning
wand will cause a decrease In the
VTVM reading.Repeat steps 20,21,
and 22 until no further Improvement
canbe made.
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FIG. 3
FIG.4
PAGE?