Seeburg 7800, Руководство по обслуживанию

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Service Manual '41 Models 7800, 7850, 8800 and 9800
� . I H S T R U C T I O N S F O R I H S T A L LA T I O H
O F W I R E D R E H O T E S P E A K ER
These instructions concern
the remote speaker and the
speal�er volume control box for
1941 Symphonolas. A total of
three speakers, incl�ding the
speaker in the Symphonola, may
be connected to these Symphon­
olas.
The speaker control box is
mou_�ted on the inside of the ex­
tra speaker cabi.net for packing
purposes only. It should be re­
moved and mounted on the bottom
of the amplifier shelf with the
control key 2-7 /8" from the left
hand wall (when viewing the Sym­
phonola from the rear) on Models
8800 and 9800.
On
Hodels 7800
and 7850, it should be mounted
on the right hand wall (when
viewing the Symphonola from the
rear) with the control key
6-1/211 below the top of the
mechanism mounting shelf.
A
plate which covers the hole for
the control key must be removed
for access to the control key of
the speaker control box.
When connecting the speaker
control box for use. with the re­
mote speaker, the following pro­
cedure is advised:
1. Remove the g1•een dummy
plug (Fig. 10, Item 10;
Fig. 13, Item 10; Fig.
16, Item 10) from the
amplifier.
2. Insert the plug from
the speaker control box
into either one of the
1 3
two 7-prong speaker
sockets (Fig. 10, Items
11 and 12; Fig. 13,
Items 11 and 12; Fig. 16,
Items 11 and 12) .
3.
Insert the plug from the
remote speaker into
either one of the
7-prong sockets in the
control box.
4. Se� the link on the
speaker im
f
edance match­
ing panel Fig. 10,
Item lo; Fig. 13, Item
lo; Fig. 16, Item 13) to
correspond with #he
TOT�L number of speakers
in use.
There are six positions on
the key switch control in the
speaker control box. When t.. he
control is in the full counter­
clockwise position, the gl'eatest
amount of speaker energy reaches
the $ymphonola speaker. When the
control is turned
to
the full
clockwise position, the external
remote spea�ers receive the
greatest amount of energy. When
the control is in the third posi­
tion, turning in a clockwise
position from the left, the en­
ergy reaching the Syntphonola and
external speakers is approximate­
ly the same.
The regular instrument
volume control (Fig.
11,
Item 3;
Fig. 14, Item 3; Fig. 17, Item 3)
is used
to
set the overall volume
level desired.