Seeburg 7800, Service Manual

Page: 14 / 87

Service Manual •41 Models
7800, 7850, 8800
and
9800
The small 2 contact polarized
socket (Fig. 10, Item
7;
Fig.
13,
Item
7)
supplies
6
volts for the
electrical selector a nd upper
pilaster lights on the Model
8800
and
9800
Symphonolas. These
lights are o n when the main swi tell
(Fig.
11,
Item l; Fig.
14,
Item
1)
is in the "on" position.
The
4
contact socket (Ftg.
10, ttem Fig.
13,
Item
6;
Fig.
16,
Item supplies
117
volts
to the primary of the lighting
transformer (Fig.
1,
Item
11;
Fig. 2, Item 17; Fig.
3,
ltem
13)
••
The power to this transformer is
controlled by the light switch
(Fig.
11,
Item 2; Fig. 14, Item 2;
Fig. 17; Item 2) . V.'hen this
switch i s in the <iown position,
all lights energized by the light­
ing transformer are on continu­
ously. With the S\l'itch in the
middle position, the above lights
are off at all times. With the
switch
in
the up position, these
lights are on only when the motor
control relay contacts are
closed. The
4
contact socket
(Fig.
16,
Item
6)
on Models
7800
and
7850
also supplies 117 volts
to the program lights. These
lights are on a s long a s the main
switch (Fig.
17,
Item
1)
is in
the 11on1' position.
The small
5
contact socket
(Fig. 16, Item
7)
on Model
7800
supplies 25 volts to the magazine
magnet through the coin switches.
C.
FUSES
ON
.Jl.MPLIFIER
There are two fuse recepta­
cles ( Fig. 10, Items 14 and
16;
Fig.
13,
Items
14 ond 1
6
; Fig. 161
Items
14
and
16)
on the amplifier.
The fuse (Fig. 10, Item
15;
Fig.
13,
Item
15;
Fig.
16,
Item
15)
in
the covered receptacle (Fig. 10,
Item 14; Fig.
13,
Item 14; Fig.
16,
Item
14)
is a 2-1/2 ampere
cartridge type light fuse . The
fuse (Fig. 10, Item
17;
Fig.
13,
Item
17;
Fig.
16,
Item
1
7
) in the
sc:·ew type socket (Fig.
10,
Item
16;
Fig.
13,
Item
16;
Fig.
16,
Item
16)
is a 2-l/2 ampere non­
tamperable type fuse for the Sym­
phonola motor. It i s very impor­
tant that a blown fuse be replaced
with one of the correct value.
3,
E L E C T R I CAL
SELECTOR
A . GBNERAL
The Electrical Selector
supplements the mechanical
selector; it is an electrical
device located on the front o!
the sy�phonola at which selec­
tions are made. Two models of
the Electrical Selector differ­
ing in mechanical arrangement of
parts are discussed
in
this
manual. One is the type
E
selector which is almost identi­
cal to the
1940
selector except
the operating voltage is 25
vol ts. The other is the type
C
selector which has the same
5
electrical characteristics as
the type
B
out differs in that
it consists of two comoonents
-­
the S.A-6Z Switch Assembly (Fig.
23) and the
PB-6Z
Relay Box
(Fig. 24) -- which are inter­
connected by means of a Selector
Cable.
The Electrical Selector
works
in
conjunction with the
Solenoid Drum (Fig. 25) to con­
trol the rear helix of the Sym­
phonola Chassis a nd effect the
desired selection. The primary
!unctions
of
the mechanism in
the electrical selector are
(1)