Pioneer PL-450 User manual

Y) PIONEER
Service
PIAZEVUEN
CIRCUIT & MECHANISM
DESCRIPTIONS
REPAIR & ADJUSTMENTS
STEREO TURNTABLE
L-450
PL-405
MODEL
PL-450
COMES
IN
FIVE
VERSIONS
DISTINGUISHED
AS
FOLLOWS:
Voltage Remarks
ORDER NO.
ARP-502-0
The photo shows the model PL-450.
AC 120V only U.S.A. model
AC 120V only Canada model
AC 220-240V European continent model
AC 220-240V United Kingdom model
AC 110-120, 220-240V (switchable) General export model
Voltage
AC 220-240V United Kingdom model
AC 110-120, 220-240V (switchable) General export model
"AC 120V only U.S.A model
AC 120V only Canada model
@ This service manual is applicable to the PL-450/KU type.
@ Both model PL-450 and PL-405 have the same basic mechanism and performance. The only difference is
in appearance.
® For servicing of the PL-450/KC, WEM, WB, R and PL-405/R, WB, KU, KC types, please see 21 ~ 30
page.
® Ce manuel d ‘instruction se rerére au mode de réglage en francais.
®@ Cste manual de servicio trata del método de ajuste escrito en espafiol.
PIONEER ELECTRONIC CORPORATION =~, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS [USA] INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
TEL: (B00) 421-1404, [phone] |
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgium TEL: 03/775:28:08
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
TEL: [(O3] 580-9911
FG © MAR. 1984 Printed in Japan

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2.
PANEL
FACILITIES
@ SPEED SWITCH
Set
this
switch
in
accordance
with
the
speed
of
the
record
which
is to
be
played.
[33]
(released
position):
[45]
(depressed
position):
@ TONEARM
@® ARM ELEVATION LEVER
For 33-1/3 rpm records.
For 45 rpm records.
Use the lever for record play.
Use
the
lever
to
suspend
record
play
temporarily.
Use
the
lever
when
changing
the
tracks
during
actual
play.
Lever in ““UP” position:
The
tonearm
rises
up,
lifting
the
stylus
off
the
record.
Lever in ‘‘DOWN” position:
The
tonearm
descends,
lowering
the
stylus
onto
the
record.
@ ARM REST
This
serves
to
hold
and
clamp
the
tonearm.
When
moving
the
tonearm,
release
the
clamp.
HEADSHELL
CARTRIDGE
(PC-250T)
PLATTER
PLATTER SHAFT
RUBBER MAT
EP ADAPTER
This
is
used
when
playing
records
without
a
“large
center
hole”.
@ CABINET
@ DUST COVER
©@OOQ9eE®@

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PwoN Re
. Turn on the turntable and free the mechanism.
. Fasten the tone arm to the arm rest.
. Remove the rubber sheet and turntable platter.
. Close the player hood and turn the palyer up-
side down and place it on a soft cloth so that
the player hood is not damaged.
. Remove the seven screws @, and remove the
bottom plate.
. Remove five screws @ and two screws @.
. Disconnect lead wire © .
The mechansim ass’y can be removed from the
panel.
. Using a soldering iron, disconnect the lead
wires @) from the motor.
Disconnect lead wire @) .
Remove the two screws @® , and remove the
motor.
See pages 14 ~ 16 for the parts installation and
assembly precautions.
@ Tone Arm
1. Remove the mechanism ass’y from the panel.
2. Using a soldering iron, disconnect the PU lead
wires (arm lead wires) from the PU terminal
board.
3. Remove the one screw @ , and remove the PU
palte ass’y from the tone arm.
4, Remove the R clip.
5.Tum the player onto its side, remove the
arm reset clamp, and remove the tone arm
from the panel.
@ Power Supply Ass’y
Remove the two screw @.
(Remove the two screw @ (only R model))

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6.
P.C.
BOARDS
CONNECTION
DIAGRAM
POWER SUPPLY Ass’y(XWR-047)
ACpower cord
PDG-023
AC 120V
60z
Si: MICRO SWITCH
(POWER)
PSF-023
MOTOR Ass’y PYY- 163
| VRI : SPEED ADJ45rpm
VR2 : SPEED ADJ33rpm
e
rep I
i ee
SPEED SELECTOR Ass’y
(XWS-022)
4
Se)
:
6
7.
SCHEMATIC
DIAGRAM
$1 F
POWER
SUPPLY
Ass’y
A
REEL
(XWR
-
047
)
[2
_
PSF
-023
A
A
ne
D1
PCX
-010
MOTOR
Assy
PYY-
163
eee
or
S1RBA10
ee
;
‘
,
VR:
SPEED
ADU
45
rpm
- eee
| VR2: SPEED ADJ 33rpm
|.
[35] tee reo
AC POWER CORD
'
PDG-023
!
BLK
t @ VRI 10k
A
tee
ce
Ee
eed
‘
——
$2:
SPEED
}
|
AC
120Vv
PSG-049
6OHz
4
'
33(1/3)
O
|
1.
RESISTORS:
!
(1
)—
Indicated in 2, %W, “eW. +5% tolerance unless otherwise noted k :k{2, 45 So 1
M : MQ, (F) > #1%, (G) : 22%, (K): + 10% (M); +20% tolerance ! 1
2.
CAPACITORS:
|
-
-
a=
:
Indicated
in
capacity
(1F)/voltage
(V)
unless
otherwise
noted
p
:
pF
E
ELEC
Ass
y
Indication
without
voltage
is
50V
except
electrolytic
capacitor.
(XWS-022
)
3. VOLTAGE
: DC voltage (V) at no input signal
LJ
:D€
voltage
(
put
sig
SWITCHES:
4.
OTHERS:
.
ep
Signal
route.
$1:
POWER
ON
~
OFF
@
:
Adjusting
point.
S2.:
SPEED
33V3
rpm
—
45rpm
The mark found on some component parts indicates the im-
portance
of
the
safety
factor
of
the
part.
Therefore,
when
replacing,
The
underlined
indicates
the
switch
position.
—
be sure to use parts of identical designation.
This
is
the
basic
schematic
diagram,
but
the
actual
circuit
may
vary
due
to
improvements
in
design.

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