Luxman PD-375 - Parts Lists; PB-1373-1 Parts List; PB-1373-2 Parts List; PB-1373-4 Parts List

—-D-375 |
P.C.B.ALIGNMENT
PROCEDURES
Set
voltage
for
adjustment
at
11.5
+0.1V
with
use
of
an
EP
disc
and
prevent
the
sensor
from
receiving
external
light.
1,
Adjustment
of
the
VRO2
(adjustment
of
the
hysteresis
in
schmidt
trigger
circuit).
a.
Make
preliminary
adjustment
of
the
VRO2
not
to
make
I.C.
No.4
"H"
from
"L"
when
the
sensor
is
open.
'
ae
Rester
ester
LED
Lever
LED
Lever
=
en
Ass!
Sensor
Ass'y
Fig.3
Sgr
veie
:
CLOSE
b.
Separate
output
of
the
sensor
as
per
the
Fig.4
below
and
put
a
variable
resistor
externally
to
give
output
of
the
sensor
voluntarily.
Photo
Transistor
LK B
Fig.4
ec.
Measure
"H"
of
output
of
the
sensor
(provided
to
be
V
)
at
the
foregoing
step
a
and give
voltage
of
(V
-0.8V)
at the
foregoing
step
b.
d. At the foregoing step c adjust the VRO2 to make I.C. No.4 "H" from "L".
e. Separate the external variable resistor.
2. adjustment of the VRO1
a.
Make
preliminary
adjustment
of
the
VRO1
not
to
make
1.C.
No.4
"L"
from
"H"
when
the
sensor
is
made close
from
open.
b.
Adjust
the
VRO1
until
I.C.
No.4
becomes
"L"
from
"H"
when
the
sensor
is
made
open
from
close.
At
this
time
read
out
output
of
the
sensor
and
adjust
the
VRO1
to
make
the
output
-0.6V
right
at
the
moment
when
I.C.
No.4
has
becomes
"L"
from
wytt
‘
ADJUSTMENT
OF
SW-O7
(Main
Cam
SW)
This
alignment
is
needed
in
the
"play"
mode
when
the
charge
lever
cannot
be
opened
sufficiently
or
the
lever is
going
to
shut
again
causing
irregular
noise
or
preventing
the
platter
from
turning
due
to
the
touch of
lever
shaft to
the
platter.
7™N
Main cam actuator
|
|
|
Main
cam
|
SW-07
ay --~
As the pivot of the main cam actuator is eccentric, you can change the timing of
the SW-07 by turning the pivot with a (-) screw driver.
Adjust the main cam actuator so that the motor can stop when the charge lever is
in the at most open status by pushing the V.D.S. on switch (SWO2).
However, as the pivot of main cam actuator plays the circular movement, there are
two points having the same timing between the main cam and main cam actuator.
7
Be
sure
of
choosing
the
very
position
which
pushes
the
SW-07
more
than
the
other.
After
adjustment,
do
not
forget
to
put
glue.