Seeburg 7800, Service Manual

Page: 28 / 87

Service
M.;snual '41 Modela
7800, 7850, 8800 and 9800
line with the selector pawl
springs, the adjustment can be
greatly simpliried by bending the
helix roller mounting stud (Fig.
6A; W o . 1222) slightly upward
or
do11nward u.11til the proper align­
ment of t.he roller with t.he
selector pawl spring is a tt a ined .
5 .
TURHTA8lE DOES HOT F U H C T I O H
PROPERLY
A.
TUnNTABLE
FAILS TO RISE TO
PLAYI
N
G POSITION
If the turntable fails to
rise to the playing position,
there may be i.nsuf ficient or
faulty lubrication on the turn­
table spindle bearings. Use
SAE-10 oil.
DO NOT
USE a light
sewing machine oil.
Foreign obstacles such as
dust
or
grit m�y enter the turn­
table bearings and cause the
sha.ft
to bind. Dtrt and .foreign
matter' may
b
e
removed from the
turntable spindle as follows:
With the turntable
in
i
t
s upper­
most position and the motor cut
off� by means of the main switch,
flood generously will oil, �ov­
ing the turntable up and dol'IU
with the .fingers, and
wipe
off
with a clean clo t h . Repeat this
operation until the shaft and
bearings are clean. Re-oil
lightly with No.
Sl.E-10
oil.
If the turntable lift
springs (Fig. SA, No.
1009)
are
too weak, replace with new
springs from the factory.
I t i s possible that the
�urntable gears may be meshed
too tightly. There should be
slight play betw·een the teeth of'
the turntable worm gear
(l<'tg.
4,
N o . l528A) and steel l'lorm (l''ig.
4,
No.
1022) .
�he
transn1ission
i i
casing (Fig.
4,
No.
1040)
con­
taining tne steel worm assembly
can be moved
away
from the turn­
table worm gear
(Fig. 4,
N
o
.
1528A) to allow about
.•IJ05"
play
between the teeth of the gears.
B .
TURNTABLE DOES NOT ROTA�?,
\i,'HEN IN PLAYING POl:>ITION
The
t
urn
ta
b le clutch (Fig.
4, wo.
1014)
in the lower end of
the t ur n t
a
b
l
e soindle should
have
a
slight
siippage
to absorb
the
jar as it engages with the
clutch pin underneath the turn­
table gear (No.
1
5
2
8 11
)
•
If th is
clutch
is
too
loose it will not
drive the
turntable. In
this
event,
the clutch spring (No.
1S15)
should be replaced.
The turntable clutch (Fig.
4, No.
1014)
should engage the
pin underneath the turntable
gear (Fig. SA, No.
1528A) .
With
the turntable in the raised posi­
tion, the turntable elevating
cam (No.
100€)
should be clear ot
tl1e cam roller (Fig.
6A ,
N o .
1016) so that the turntable
clutch will engage the clutch pin
in the turntable gear.
It the
turntable elevating cam does not
stop in the correct playing posi­
tion, it
ca. �
be slightly adjusted
by means of the adjusting screw
on
the clutch release pawl
(No.
1077)
�
o
un
t e d
on
the turntable
elevating cam
(Fie.
4 ,
N
o.
lOOS) .