Seeburg LS 1 - Simplified Write in Circuit

SERVICE I\,IANUAL
t0.22
SELECT-O-MATIC
PHONOGRAPH,
Model LSI
Page 15
Figure 8 shows rhe writeio circuit that
is used to
generare
the
electical pulse that
"selects"
a
toroid.
The
lUl contact of the subtract
solenoid in the UDPU6 is the
ttigger switch that
provides a
discharge
path for
the wrirein
capacitor,
C3114. The letter
and
number switches
dire ct the pulse to the
appropriate toroid.
l
d-L
Irsorr,ri
-l
3
a
L,
IO SELECTEO UTiAEF
FRO SELECIED NU SER
TO
SELECIEO
L''TER
(a3',
IiOf
SELECTED IETTER
L_l
NOTE: Alr contact! .hown
wlth
ZERO CREDITS
on th.
ohonocreph
snd the mechanlsm at REST POSITION.
r€3ror
cR:Jro
1.,T
t
.1^ rro\h
t
13;f
crr2 *
+ c3rr5
or MFDf
-r.oruFo.
Figure
8. Simplified
Vritein C.ircuit.