Luxman PD-375 - Full-Auto Mechanism Operation and Diagrams; Explanation of Full-Auto Mechanism; PB-1373 Block Diagram

PD-3
EXPLANATION ABOUT FULL-AUTO MECHANISM
(1) Normal (Power SW ON only in Play)
Only NAND Gate input 12 is different between 33 r.p.m. and 45 r.p.m.
(2
Rees
Put on START/CUT Button
NAND Gate output 10 shall be OV, and TRO1 and AC motor shall be ON.
As soon as AC motor has been ON, SW 10 shall rotate until TRO1 becomes OFF
after SW 10 on the cam at the final stage has again turned over and the cam
at the final stage has turned over half.
=
Ww
Record End
As inside most diameters of LP and EP Groovesare different each other,
operation is also different (Its change can be done by individual r.p.m.)
33 L.peM.
When the slit of Rester Lever comes into Sensor Assembly and the photo
transistor becomes ON by L.E.D. light, NAND Gate output 11 shall be ON and
ACG motor Shall begin to rotate.
45 Y.pem.
When the slit of Rester Lever comes into Sensor Assembly with a photo
transistor's being ON and the tonearm reaches the inside most with the
slit's shutting off L.E.D. light and eventually the photo transistor's
being OFF, NAND Gate output 10 shall be OV and AC motor begins to rotate.
(On this occassion when the tonearm returns, the slit of Rester Lever again
passes through Sensor Assembly and the above mentioned signal shall be input.
However, it is not directly related since AC motor is in operation by SW 10.)
(4) Repeat
When the tonearm returns to the armrest in REPEAT mode, 12V shall be loaded
to the 6P connector by SW 11 and same operation shall be made as in case of
pressing START/CUT button.
REMARKS: As mentioned above be careful for any light from outside to come
especially into Sensor Assembly when you are repairing since this
fll-auto mechanism is optical one.
PB-1373 BLOCK DIAGRAM
=— tae VDS ON
=
vDS
on
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L
i
ee
MAIN
CAM
GE
ee
Q12
SENSOR
ASS
VDS OFF sw) 3. ~
Swo3 | {
Swot
|
AC
MOTOR
START/CUT SW\
e [J DC 12V
r
“Iv.D.S.
'
MAIN
MOTOR Cae Bei
. ent
REPEAT
i
Ol
|
Swo7
AUTO FUNCTION Sw
AUTOUFT OFF°_ ae
eons
2
TONE ARM POSITION
DETECTING SW