Seeburg 7800, Service Manual

Page: 33 / 87

Service
Manual '41 Models 7800, 7850, 8800 and 9800
have approximately 1/3211
(no
more)
space between t
h
e
end
of
the pin in the transmission clutch
(Fig. 4, N e . 1509)
end t
h
e pin in
t
h
e
turntable
worm gear shaft.
Now loosen the T r
a n
s
m
i
ss
ion
Clutch Release Lever again and
sl
i
d e
lt a
lo
n
g
the shaft until it
i
s in line with the heed
of the
screw on the
Caro Shatt Cl
u
t
c
h
.
Throwout Pawl (Fig.
4,
N
o . 1077) ;
then
ti
g
ht
e
n
the
screw on
the Re­
lease Lever just
en
o u gh
so �s to
hold its position on
the
shaft
but not so
tight
es to
lock 1 t ,
The angle of the
lever on
the
sheft should be such that when
the throwout pawl is brought up
ageJ.nst
it
approximately i/16 " of
tts upper
edge
will be
under
the
horizontal flet pert of
the
lever.
When
i n
this
p
os i
tion, t
i
g
h
t
e n
the lo ck i n g screw on the Re l e
a
se
Lever.
In
tightening the screws
which hold the levers to
the
sh
a
f
t a proper screwdrl ve:r.·
should
be u
se
d to set
the screws up
ti
g
h
t
and
the
lock
nuts should
be
t i g
ht
e
n
e
d 'Iii
t
h
a w
r
e
n c
h while
�he
screws
are held
with a screw­
d
r i
v
er.
1 3 .
SOUllO E�UIPMEHT
A . SOUND
EQUIPMENT
APP.ARENTLY
"DEAD11
Note whether the light
fuse
(Fig.
10,
!tem
15; F
i
g . 13,
Item
15;
Fi
g
.
16, Ite�
15)
on
the
amplifier is blown.
It it is
blown, replace it with a 2-1/2
ampere fuse (No.
F-7846) .
Before
re
p
le
c
i
n
g
,
test for shorts in
the
l i g
h
t c
i
rc
u
it
s
.
Mal<e certain that. t.here is a
se
p
e
r
e
ti
o
n
bet•11een
the contai:?t
p
o
in
t
s of
the
pickup shorting
switch (f'ig.
6.A,
No.
6005-l.) .
Check
t o see
1.f
t
he needle
is making conta
ct
wit..lt the
rec­
ord.
�lith the
ins
t ru
m
e
n t on, the
turntable rotating, the volume
c
o
ntr
o
l on
full,
and the pickup
s
h o
r
ti
n
g
switch
in
open position,
remove
the
6J5GT tube
(
i
'
i
g
.
10,
t
t
e
m 02;
13,
I
t
e
m
52; Fig.
16,
Item
nearest
the socket
marked np.u.1'f .A
loud click
should be h
e
ar
d.
It
no click
is
heard, the trouble
will be in
the
a
mp
li f
i
er which should be checked
by a
competent sound or
radio re-
26
pair
ma
n
.
I f e l o u d
click is
heard when the tube nearest the
socket. marked
t•p. ll. 11 is
r
e
!ll
o
v e:
d
,
then
the t
r ou
bl
e nrny
be
i
n
the
p
i
c
k
u p shorting
Sl'litch, the
pick­
up wires, er
th
e
pickup itself.
B. DISTORTED TONfi
�UALI'l"Y
Remove the needle
and check
1.ts point under a g
oo
d
light.
Sometime s a
n
e
ed
l
e
that has
w
o
r
n
badlY 'll:lll
still pletY some rec­
ords, but will f a i l to enter
pr
op
er
l
y
the
more n�rrow
gr
oo
v
e
s
ot
others. A
needle
in
t
h
is
con­
dition will ceuse poor � u
a
lit y
reproduction and should, of
course, be repla ced.
The n.eedle s
c
r
ew
may n o
t be
t
i
g
h
t enough .
Mal<e
ce
r ·
t
a
i
n
that the rec­
ords are still Jn
f
airl y good
condition. This
is very
impor­
tant, for t:t.e
reproducti.or. of
m
u
s
i
c will still be poor ii" the
record
is
b
e
dl y ?101·n, or
dei'ec­
ti
ve, ever,
though
the entire
sound
equipment is
in
per!'ect
working order.