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Section 1.
GENERAL DESCRIPTION
1.
FACILITIES— Emerson Models 614, 637, 644,
and 647 are wide-band video receivers, providing di-
rect-view high-definition p.ctures on ten or
electro-magnetic deflection kinescopes.
corporate several design features including intercarrier
sound, AFC in the horizontal sync circuits, automatic
gain control, a series-type transformer power supply,
and internal antennas.
Models 614 and 637 employ Chassis 120110B;
Models 644 and 647 use Chassis 120113B. Both chassis
are basically alike; the latter is modified to accommo
date the larger kinescope, type 12LP4 or 12QP4.
Model 614 is housed in a plastic cabinet, and Model
637 is contained in a wooden cabinet; both are table
model receivers using a type 10BP4 picture tube.
Model 644 is housed in a table model cabinet; Model
647 uses a consolette-type of cabinet.
2.
SPECIFICATIONS—
a.
TUBE CO M PLEM E N TS: (Table 1).
N O T E : The tube complements of both chassis
are alike, except for the kinescope. Chassis 120113B
uses type 12LP4 kinescope; some chassis may be
equipped with a type 12QP4.
WOBBLE PLATE
LEVER
DEFLECTION YOKE
ON-OFF VOLUME
AND CONTRAST
AUDIO l-F
SECTION "
VERTICAL HOLD
BR IG H T N ESS -
AMD HORIZONTAL HOLD
tw elv e-in ch
All models in
LOW VQLTACE -
POWER SUPPLY
K IN E S C O P E
10 B P #
OR
I2 L P 4
SELECTO R AND
T
r
f i n e
u n i n g
Scanned by mbear2k - Jan 20121/17
Figure l - l — Front View of Chassis 12011 OB
TUBE
SYM BOL
TYPE
V I
First video i-f amplifier
6AG5
V 2
Second video i-f amplifier
1 6AG5
V3
6A U 6
Third video i-f amplifier
Video detector and AG C
V 4
6AL5
First video amplifier
6A U 6
V5
Second video amplifier; second
V 6
12AU 7
sync amplifier
Sound i-f amplifier
V 7
6A U 6
Sound limiter
V 8
6A U 6
Sound disc, and audio amp.
V 9
6T8
V10
6V 6G T
Audio output
V l l
6SN 7G T
Hor. phase invert.; horizontal
control (d.c. amp.)
Hor. phase det. (sync disc.)
V 12
6AL5
6S N 7G T
Hor. oscillator and discharge
V13
6S N 7G T
Vert, oscillator and discharge
V 14
V15
12AU 7
Sync sep. and d.c. restorer;
first sync,
V16
6K6GT
Vertical output
6BG6G
V I 7
Horizontal output
V18
1B3GT
High-voltage rectifier
6W 4G T
V19
Horizontal damper
jlOBP4* or
V25
Kinescope
112LP4 #
V 27
6J6
Oscillator and converter
V28
6AG5
R-f amplifier
V 29
5U4G
Low-voltage rectifier
* Chassis 120110B
# Chassis 120113B
PICTURE CENTERING
LEVER (FOCUS COIL} -
Emerson Radio
F U N C T IO N
amplifier
, HI0H VOLTAGE
POWER SUPPLY
VIDEO l-F
SECTION
TURRET
~ TUNER
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