Tube Complements - Emerson 614 Service Manual

Emerson Radio
1. GENERAL
Model 648B is a wide-band video receiver,
providing direct view high-definition pictures on
a ten-inch electro-magnetic deflection kinescope.
This model incorporates several design features
including Expan-Scope, Built-In-Antenna, Auto­
matic Gain Control, Inter-carrier Sound, Auto­
matic Frequency Control and a Transformer
Power Supply.
2. EXPAN-SCOPE
The Expan-Scope incorporates a remote switch with a 20 foot extension cord which enables the viewer to either
watch a normal picture or one which is expanded both vertically and horizontally so that the center of the picture is
enlarged. This unit is plugged into the expan-scope jack in the rear of the chassis. (See Fig. 1)
The horizontal expansion is accomplished by inserting condenser (C-78) in series with the horizontal deflection
yoke and opening the horizontal width coil (L -6). The vertical expansion is accomplished by raising the plate voltage
of the vertical amplifier. This is done by shorting resistor (R-105). To improve vertical linearity (R-102) is also shorted.
CABINET PARTS LIST— (MODEL 648B)
PART NO.
140335
Cabinet— Bakelite
410805
Mask
450041S Knob— Off-Volume
450044 Knob-— Fine Tuning
450045 Knob— Contrast and Brightness
Knob— Selector
45005 IS
505040 Connector Plug— Speaker
Selector Escutcheon
520103
Back
5601UB
580689 Twin Conductor Lead (1 10 ")
583206 Line Cord
Plug and Cable— (Speaker)
^85056
Safety Glass
635023
180066
Speaker— ( 6 ")
TUBE COMPLEMENTS—(CHASSIS 120110-E)
TUBE
SYMBOL
TYPE
V I 6AG5
V2 6AG5
6AU6
V3
6AL5
V4
6AU6
V5
V6 12AU7
V7 6AU6
6AU6
V8
6T8
V9
V10 6V6GT
6SN7GT
V l l
V 12 6AL5
6SN7GT
V 13
6SN7GT
V 14
12AU7
V 15
6K6GT
V l6
6BG6G
V 17
1B3GT
V 18
6W 4G T
V19
10BP4
V25
6J6
V27
6 AG 5
V28
5U4G
V29
24
Model 648B
DESCRIPTION
FUNCTION
First video i-f amplifier
Second video i-f amplifier
Third video i-f amplifier
Video detector and AGC
First video amplifier
Second video amplifier; second
sync amplifier
Sound i-f amplifier
Sound limiter
Sound disc, and audio amp.
Audio output
Hor. phase invert.; horizontal
control,Cd.c. amp.)
Hor. phase det. (sync disc.)
Hor. oscillator and discharge
Vert, oscillator and discharge
Sync sep. and d.c. restorer;
first sync amplifier
Vertical output
Horizontal output
High-voltage rectifier
Horizontal damper
Kinescope
Oscillator ?md converter
R-f amplifier
Low-voltage rectifier
Scanned by mbear2k - Jan 20121/17
Model 648B uses chassis 120110E and is
housed in a plastic cabinet.
It should be noted that the tuner assembly
part number listed for chassis 120110E is not
the same as the tuner part number listed for
chassis 120110B. These tuners are identical elec­
trically, the only variation being mechanical.
Alignment procedure, circuit description and
general information, will be the same as that
given for Model 614 using chassis 120110B.
Fig. 1 —Operating Controls
PARTS LIST
SYMBOL PART NO.
C-5 928006 1,500 mmf Ceramic, 400v
C-6 928006 1,500 mmf Ceramic, 400v
.005 mf Circ. Ceramic, 400v
C-7 928109
C-8 928006 1,500 mmf Ceramic, 400v
910015 270 mmf Mica, 400v
C-9
C-10 928006 1,500 mmf Ceramic, 400v
928006 1,500 mmf Ceramic, 400v
C -ll
C-12 910015 270 mmf Mica, 400v
928006 1,500 mmf Ceramic, 400v
C-13
C-14 928006 1,500 mmf Ceramic, 400v
C-15 910290 30 mmf Mica, ± 10%
C-16 923062 .05 mf Paper, 400v
C-17 928006 1,500 mmf Ceramic, 400v
C-18 922025 .047 mf Paper molded,
922025 .047 mf Paper molded,
C-19
922008 .1 mf Paper molded,
C-20
C-21 Pt. of C-39 10 mf Electrolytic, 450v
922015 .01 mf Paper molded,
C-22
(Continued, on page 2 7 )
DESCRIPTION
± 2 0 % , 400v
± 2 0 % , 400v
± 2 0 % , 400v
± 2 0 % , 400v