Seeburg 7800, Service Manual

Page: 32 / 87

Service Manual '41 Modela 7800, 7850. 8000 and 9800
"Burrs1t or nflats" on the
turntable spindle No. 1121, Fig.
6A, and the varying surfaces may
also produce the wa�bling tone.
These burrs should be polished
off to �llow free movement of the
spindle
in
the bearing.
The teeth in the fiber gear
No.
l528A,
Fig. SA, should b e
properly 11worn in'' . By applying
pressure to the fiber gear, push­
ing it in the direction of the
worm gear, it is possible to wear
down objectionable points in the
gear. The Pr€ssure should
be
ap­
plied w.i. th a soft smooth material
preferably
a
block of wood; it
should be just enough to slow up
the motor slightly and should be
a�911ed for about one minute.
The small retaining yoke No,
1024
which holds up the fiber
gear hub should be free when the
turntable i s in the playing posi­
tion.
1 1 .
SLOW R E C O R O START
Occasionally the music
sounds a s though the turntable
started rotating too slo•.lfly.
This
is
invariably caused by a
tight clutch spring (Fig. 4, ltem
1815) .
The clutch is too rigid
a.."Yld
when it first engages the turn­
table drive gear (Fi g .
6,
Item
1528A) it rotates the turntable
ahead of t..he point of engagement.
While it coasts, the music starts
playing
and
it sounds as though
the turntable is runni.."'lg at slow
speed.
The clutch then catches
up with the turntable and it con­
tinue� to be normal.
This can be remedied by re­
ducing the tension of the clutch
spring.
A
small screw-driver
should b e used to push the em­
bedded end of the spring back,
1m,1inding it
and
causing i t to
have less tension.
I 2, A D J lJ S H I E H T 0 F S Y M P ll O H O L A
CLUTCH T H
ROW
OUT
L EV E R S
This adjustment consists es­
sentially in properly aligning
the two levers 6C, Item
1052 and Item on the re­
set shaft ( f ig . SD, Item 1511) .
Before
starti.11€
any adjustments
be sure that the turntable is
in
the playing posl tlon with the
bronze roller in the lowest part
of the cam.
�lso be certain the trans­
mission clutch and pin (Fig.
4,
No. 1509) is flush with the end
of the shaft. In early models of
Symphonolas this clutch body was
fastened with setscrews. Next be
sure that the collar holds the
25
fork against the casting when the
pin is a t the bottom of the slot
in the worm gear .
The Clutch Retaining Lever
(Fig. 6C, No. 1052) is the first
to be permanently set. Bowe•rer,
first take the Transmission Clutch
Release Lever (Fig.
6C,
No.
1507)
and tighten it on the shaft
in
approximately a vertical position.
Now place the retaining lever up
against the Yoke bar {being care­
ful it does not rub against the
inside of the Yoke (Fig. 6D, N o .
1
5
0
8)
and then holding i t there
with your thumb, draw· back on the
Clutcf\ Release Lever until you