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Howard T-10823 User manual

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PHOTO
FACT*
Folder
U.S.
TELEVISION
MODEL
T-1O823
HOR.
HOLD
CONTROL
VERT.
HOLD
CONTROL
VOLUME
CONTROL
ON-OFF-SW
BRIGHTNESS
CONTROL
CONTRAST
CONTROL
FINE
TUNING
STATION
SELECTOR
TRADE
NAME
U.S.T.
Model
T-10823
MANUFACTURER
United
StatedTelevision
Mfg..
Corp.,
3 W.
61st
St.,
New
York,
New
York
TYPE
SET
TelevisionReceiver
TUBES
Twenty
Five
POWER
SUPPLY
110-120
Volts
AC-60
Cycle
TUNING
RANGE-Channels
2
thru
13
RATING
2.6
Amp.
at117
Volts
AC
Alignment
Instructions
6,7
Block
Diagram
20
DisassemblyInstructions
19
Horizontal
Oscillator
Adjustment
19
Parts
List
and
Description
16,17,18
INDEX
Photographs
Cabinet-Rear
View
.19
CapacitorIdentification
11,
22
Chassis-Top
View
3,13
High
Voltage
Supply
13
Photographs
(continued)
RF
Tuner(RCA)
10
RF
Tuner(Standard
Coil)
15
Resistor
Identifications
12,
21
Trans.,
Inductor
and
Alignment
Identification
...
4,9
Schematic
2
Schematic
(StandardCoilTuner)
14
TubePlacement
Chart
5
Voltage
and
Resistance
Measurements
8
HOWARD
W.
SAMS
&
CO.,INC.
•
Indianapolis
1,
Indiana
"The
listing
ofany
available
replacement
part
hereindoes
nat
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 havebeen
compiled
from
information
furnished
to
Howard
W.
Sams
&
Co.,
Inc.,
bythe
manufacturers
ofthe
particular
type
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
1950
by
Howard
W.
Sams
&
Co.,Inc.,Indianapolis
1,
Indiana,
U.S.of
America.Copyrightunder
In-
ternationalCopyright
Union.
All
rights
reserved
underInter-AmericanCopyright
Union
(1
910)
by
Howard
W.
Sams
&
Co.,
Inc.Printed
inU.S.of
America
O*
o
•
i,
<
O
t/i
00
7
to
O
w
Z
DATE
3-50
SET
89
FOLDER
15
THE
COOPERATION
OFTHE
MANUFACTURER
OF
THIS
RECEIVER
MAKES
IT
POSSIBLE
TO
BRING
YOU
THIS
SERVICE
LV
RECTIFIER
®5U4t
A
PHOTOFACT
STANDARD
NOTATION
SCHEMATIC
Howard
W-
Sams
&
Co.,Inc.1950
PAGE
2
!m)6AT6
AUDIO
OUTPUT
®6K66T
89-15
U.S.
TELEVISION
MODEL
T-1O823
M3IA
dOl
SISSVHO
frlOVd
CHASSIS
BOTTOM
VIEW-TRANS.,
INDUCTOR
AND
ALIGNMENTIDENTIFICATION
Ct
801-1
13QOW
NOISIA3131
'S
*n
BOTTOM
VIEW
TUBEPLACEMENTCHART
NOISIA3131
'S
Tl
ALIGNMENTINSTRUCTIONS
ALIGNMENT
INSTRUCTIONS—
READ
CAREFULLYBEFORE
ATTEMPTING
ALIGNMENT
The
high
voltage
shock
hazard
maybe
eliminated
by
removing
the
horizontal
oscillator
tube
(V20)from
its
socket.
VIDEO
IF
ALIGNMENT
If
thesethasanRCA
Tuner,
remove
the
local
oscillator
tube(V3)
to
prevent
erroneous
indications.
Ifthesethas a
Standard
Coil
Tuner,
remove
the
channel
13
segment
ofthe
converter
section
ofthe
tuner
turret,
and
turn
tlie
channel
switch
to
channel
13to
disable
the
local
oscillator.
DUMMY
ANTENNA
Direct
Direct
Direct
Direct
Direct
Direct
Direct
Direct
SIGNAL
GENERATOR
COUPLING
High
side
to
ungrounded
tube
shield
floating
over
mixer
tube(V2).
Low
side
to
chassis.
"
"
"
SIGNAL
GENERATOR
FREQUENCY
2I.25MC
(Unmod.)
27.25MC
19.75MC
21.8MC
25.3MC
22.
SMC
25.2MC
23.4MC
CHANNEL
13
"
"
"
CONNECT
VTVM
DC
Probe
to
PoinU^
Common
to
chassis.
"
•'
ADJUST
Al,
A2
A3
A4
A5
A6
A7
A8
A9
REMARKS
Adjust
for
MINIMUM
deflection.
"
Adjust
for
maximumdeflection.
OVERALL
VIDEO
IF
RESPONSE
CHECK
See
instructions
underVideo
IF
Alignment.
Connect
the
synchronized
sweep
voltage
from
the
signal
generator
tothe
horizontal
input
ofthe
oscilloscope
for
horizontal
deflection.
DUMMY
ANTENNA
Direct
DUMMY
ANTENNA
.
01MFD
.
01MFD
.
OlMFD
SWEEP
GENERATOR
COUPLING
High
side
to
ungrounded
tube
shield
floating
over
mixer
tube
(V2).
Low
side
to
chassis.
SIGNAL
GENERATOR
COUPLING
High
side
topin1
(Grid)
of
6AU6
(V14).
Low
side
to
chassis.
High
side
topin 1
(Grid)
of
6BA6(V12).
Low
side
to
chassis.
SWEEP
GENERATOR
FREQUENCY
24MC
(10MC
SWP)
MARKER
GENERATOR
FREQUENCY
19.75MC
21.
25MC
22MC
25.
75MC
27.25MC
CHANNEL
13
CONNECT
SCOPE
Vert.
Amp.
to-Point
tLow
side
to
chas-
i.
SOUND
IF
ALIGNMENT
USING
AM
SIGNALGENERATOR
Ah
SIGNAL
GENERATOR
FREQUENCY
21.25MC
(Unmod.
)
"
"
CHANNEL
13
"
"
CONNECT
VTVM
DC
Probe
thru
L
Meg.
to
Point<^
Common
to
chassis.
DC
Probe
to
Point<£>
Common
to
chassis.
DC
Probe
to
Point<§>
Common
to
chassis.
ADJUST
AID
All
A12,
A13,
A14.AI5
ADJUST
REMARKS
Check
for
response
curve
similar
toFig
1.
If
necessary
retouch
Al
thru
A9for
opti-
mum
response.
D
VTVM
REMARKS
Adjust
for
maximumdeflection.
Adjust
for
zero
reading.
A
positive
and
negative
readingwill
be
obtained
on
either
side
ofthe
correct
setting.
Adjust
for
maximumdeflection.
SOUND
IF
ALIGNMENT
USING
FM
SIGNAL
GENERATOR
AND
OSCILLOSCOPE
Use
frequencymodulated
signal
with
60
•*•
modulation
and
450KC
sweep.
Use120
~
sawtooth
voltage
in
scope
for
horizontal
deflection.
DUMMY
ANTENNA
.
OlMFD
.
OlMFD
SWEEP
GENERATOR
COUPLING
High
side
topin1
(Grid)
of
6BA6(V12).
Low
side
to
chassis.
SWEEP
GENERATOR
FREQUENCY
21.25MC
(IMC
SWP)
MARKER
GENERATOR
FREQUENCY
2I.25MC
CHANNEL
13
CONNECT
SCOPE
Vert.
Amp.
to
Point
<Q>
Low
side
to
chassis.
Vert.
Amp.
to
Point
<^
Low
side
to
chassis.
ADJUST
A12.A13,
A14.AI5
AID,
All
REMARKS
Adjust
for
maximumamplitude
and
symmetry
asperFig2.
Adjust
Allso
21.25MC
occurs
at
center
of
crossover
lines
asperFig3.
Adjust
A10
for
maximum
amplitude
and
straightness
of
crossover
lines.
Continuewith
step
13.
RFAND
MIXER
ALIGNMENT
(RCATUNER)
Replace
the
local
oscillator
tube
(V3).
Connect
a
lOOOMMFcapacitor
from
the
grid
ofthe
first
video
IF
Amp.
,
(V4)
to
chassis,
using
the
shortest
possible
leads.
The
sweep
generator
output
lead
should
be
terminated
willi
its
characteristic
impedance,
usually
50
ohms.
DUMMY
ANTENNA
Two
125SJ
carbon
res.
"
SWEEP
GENERATOR
COUPLING
Across
antenna
termin-
als
with
125S1
in
each
lead.
SWEEP
GENERATOR
FREQUENCY
213MC
(10MC
SWP)
207MC
(10MC
SWP)
201MC
(10MC
SWP)
195MC
(10MC
SWP)
189MC
(10MC
SWP)
183MC
(10MC
SWP)
177MC
(10MC
SWP)
85MC
(10MC
SWP)
79MC
(10MC
SWP)
69MC
(10MC
SWP)
63MC
(10MC
SWP)
57MC
(10MC
SWP)
MARKER
GENERATOR
FREQUENCY
211.
25MC
215.
75MC
205.25MC
209.75MC
199.25MC
203.75MC
193.25MC
197.
75MC
187.25MC
191.
75MC
181.25MC
185.75MC
175.25MC
179.
7
SMC
83.25MC
87.75MC
77.25MC
81.75MC
67.25MC
71.
75MC
61.
25MC
65.
75MC
55.
25MC
59.75MC
CHANNEL
13
12
11
10
9
8
7
6
5
4
3
2
CONNECT
SCOPE
Vert.
Amp.
thru
lOKf!
to
Point<^>
Low
side
to
chassis.
ADJUST
A16,
A17
A18,
A19
A20.A21,
A22.A23
REMARKS
Adjust
for
response
curve
similar
toFig4
with
markers
above
70%.
Check
for
response
curve
similar
toFig4.
If
markers
are
below
70%onany
channel
make
slight
adjustment
of
A16,A17,A18,A19,
with
channel
selector
setfor
that
channel.
Recheck
all
highband
channels
tosee
that
theyhave
not
been
seriously
effected.
Adjust
for
response
curve
similar
toFig4
with
markers
above70%.
Check
for
response
curve
similar
toFig4.
If
markers
are
below
70%onany
channel
make
slight
adjustment
of
A20,A21,
A22and
A23
with
channel
selector
setfor
that
channel.
Recheck
alllow
band
channels
tosee
that
.
they
have
not
been
seriously
effected.
RF
OSCILLATOR
CRCA
PAGE
6
•RUCTIONS
FORE
ATTEMPTING
ALIGNMENT
or
tube
(V20)
from
its
socket.
;vent
erroneous
indications.
Ifthesethasa
StandardCoiiTuner,
the
channel
switch
to
channel
13to
disable
the
local
oscillator.
Al,A2
Adjust
for
MINIMUM
deflection.
Adjust
for
maximum
deflection.
input
ofthe
oscilloscope
for
horizontaldeflection.
3NNECT
SCOPE
imp.
to-Point
side
to
chas-
5ENERATOR
AND
VTVM
A12.A13,
Check
for
response
curvesimilar
toFig
1.
If
necessary
retouch
Al
thru
A9lor
opti-
mum
response.
Adjust
for
maximumdeflection.
Adjust
for
zero
reading.
A
positive
and
negative
reading
will
be
obtained
on
either
side
of
the
correct
setting.
Adjust
for
maximum
deflection.
!ATOR
AND
OSCItLOSCOPE
lawtooth
voltage
in
scope
for
horizontaldeflection.
3NNECT
SCOPE
imp.
to
Point
•
side
to
imp.
to
Point
•
side
to
FUNER)
A12,A13,
A14.A15
A10,
All
Adjust
for
maximumamplitude
and
symmetry
asperFig2.
Adjust
Allso21.
25MC
occurs
at
center
of
crossover
lines
asperFig3.
Adjust
A10
for
maximumamplitude
and
straightness
of
crossover
lines.
Continuewith
step
13.
iis,using
the
shortest
possible
leads,
ance,
usually
50
ohms.
DNNECT
SCOPE
imp.
thru
i
Point^
le
to
chassis.
A16.A17
A18,A19
A20.A2],
A22.A23
Adjust
for
response
curve
similar
toFig4
with
markers
above70%.
Check
for
response
curve
similar
toFig4.
If
markers
are
below
70%onany
channel
makeslightadjustment
of
A16,
A17,A18,
A19,
with
channel
selector
setfor
that
channel.
Recheck
all
high
bandchannels
tosee
that
theyhave
not
been
seriously
effected.
Adjust
for
response
curve
similar
toFig4
with
markers
above70%.
Check
for
response
curve
similar
toFig4.
If
markers
are
below
70%onany
channel
make
slight
adjustment
of
A20,
A21,
A22and
A23
withchannel
selector
setfor
that
channel,
Recheck
alllow
bandchannels
tosee
that
.
theyhave
not
been
seriously
effected.
FIG
2
FIG.3
FIG.4
ALIGNMENT
RF
OSCILLATORALIGNMENTPOINTS
CRCA
TUNERJ
OSCILLATOR
DUMMY
ANTENNA
Twol25SJ
carbon
res.
SIGNAL
GENERATOR
COUPLING
Across
antenna
termin-
als
with
125SJ
in
each
lead.
SIGNAL
GENERATOR
FREQUENCY
215.75MC
(Unmod.)
209.75MC
203.75MC
197.75MC
191.
75MC
185.75MC
179.75MC
87.75MC
81.75MC
71.75MC
65.
75MC
59.75MC
CHANNEL
13
12
11
10
9
8
7
6
5
4
3
2
DC
Cc
WAVE
TRAP
i
Wave
traps
ASS
andA39are
used
for
specific
types
of
interfe
tuned
tothe
channelhaving
the
interference
set
fine
tuning
contr
in
the
picture
and
sound,
keeping
the
cores
at
approximately
the
ference.
RFAND
MIXER
A
Replace
the
channel
13
segment
ofthe
tuner
turret.
Th
e
sweep
generator
output
lead
should
be
terminated
with
itsc
DUMMY
ANTENNA
Two
125SJ
carbon
res.
SWEEP
GENERATOR
COUPLING
Across
antenna
termin-
als
with
125fi
in
each
lead.
SWEEP
GENERATOR
FREQUENCY
207MC
(10MC
SWP)
213MC
(10MC
SWP)
201MC
(10MC
SWP)
195MC
(10MC
SWP)
189MC
(10MC
SWP)
183MC
(10MC
SWP)
177MC
(10MC
SWP)
8
SMC
(10MC
SWP)
79MC
(IOMC
SWPJ_
69MC
(IOMC
SWP)
63MC
(IOMC
SWP)
57MC
(IOMC
SWP)
MARKER
GENERATOR
FREQUENCY
205.25MC
209.75MC
211.25MC
215.
75MC
199.
25MC
203.75MC
193.25MC
197.75MC
187.25MC
191.75MC
181.
25MC
185.
75MC
175.
25MC
179.75MC
83.
25MC
87.75MC
77.25MC
81.
75MC
67.
2
SMC
71.
75MC
61.25MC
65.75MC
55.25MC
59.75MC
easthe
channel
selector
switch
is
tun
DUMMY
ANTENNA
Two
125S!
carbon
res.
SIGNAL
GENERATOR
COUPLING
Across
antenna
termin-
als
with
125S2
in
each
lead.
SIGNAL
GENERATOR
FREQUENCY
215.75MC
(Unmod.)
DC
Co