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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Apply grease to the elevation cam and sliding
section of the raising shaft to decrease the burden
when operated.
Elevation cam
Fig. 9-5 Elevation cam section
9.2 PRECAUTIONS FOR ATTACHMENT
OF PARTS AND REASSEMBLY
@ Cam Assembly Attachment
The cam assembly is attached by letting the
lock plate go in the direction @) as shown in Fig.
9-6.
Driving plate
Locker plate
Sub-panel base
Fig. 9-6 Cam assembly attachment
@ Arm Base Attachment
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locker
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lever
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tion
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verify
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arm
rest
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check
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PU
plate
shaft
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in
the
position
shown
in
Fig.
9-7.
PU plate shaft fool ;
Switch lever
Switch locker
Fig. 9-7 Arm base attachment
@ PU Plate Assembly Attachment
The PU plate assembly is attached by pushing
the PU plate bearing section against the arm
rotating shaft fixing nut.
The attachment direction is matched to the
center of the support line as shown in Fig. 9-8
(tone arm position on the arm rest).
PU plate assembly
Panel mark
”\\ (aligned center)
PU plate
Fig. 9-8 PU plate attachment
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@ Arm Elevation Height Adjustment
1. Turn the arm elevation lever up to raise the
tone arm.
2. Adjust the screw so that stylus is 23 mm above
the panel. When the adjustment screw is turned
counterclockwise, the stylus lowers.
10.3 MOTOR ADJUSTMENTS
Place the record player on blocks as shown in
Fig. 10-3 and adjust the motor from the under base.
1. Turn the arm elevation lever up to raise the
arm.
2.Place a strobo sheet on the turntable, move
the arm to the turntable side, and rotate the
turntable.
3. Adjust semifixed resistors VR1 and VR2 of
the motor ass’y so the strobo of the strobo
sheet appears to the static.
4. First adjust VR2 for 33 1/3 rpm and then ad-
just VR1 for 45 rpm.
Screw driver
Screw driver
Fig. 10-3 Motor adjustment
17

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Cuando
el
retorno
automatico
se
produce
demasiado
rapido
o
demasiado
tarde,
efectuar
los
ajustes
siguientes.
1.
Comprobar
la
posicién
de
descenso
de
la
aguja.
Si
la
aguja
no
desciende
en
la
posicién
correcta,
ajustar
la
posicién
de
descenso.
2.
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el
interruptor
de
elevacién
del
brazo
en
la
posicion
UP
y
girar
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tornillo
de
ajuste
de
retorno
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brazo
fonocaptor
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interior
al
maximo.
4.
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se
giran
lentamente
los
tornillos
de
Fig.
10-2
Réglage
de
relevage
du
bras
de
lecture
ajuste
de
retorno
automatico
hacia
la
derecha,
el
brazo
fonocaptor
emplezara
a
moverse
hacia
el
interior.
5.
Dejar
de
girar
el
tornillo
de
ajuste
en
el
punto
Tournevis
1
O.
AJ
USTE
10.1
AJUSTE
DE
RETORNO
AUTOMATICO
y
amas
e
Ajuste
de
la
posicién
de
retorno
automatico
sii
3k
in
ses
sf
-
VRI
en
el
que
haya
un
espacio
de
32mm
entre
la
45
tr/min
aguja
de
la
capsula
y
el
eje
central.
(Fig.
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ee
Moteur
6.
Después
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ajuste,
compronar
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Ja
operacion
de retorno automatico se efectie correcta-
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aguja sea la correcta.
Tournevis
Fig. 10-3 Réglage du moteru
Fig. 10-1 Ajuste de retorno automatico
19

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PL-450/KC
11. FOR PL-450/KC, R AND WEM TYPES
11.1 PL-450/KC TYPE
Model PL-450/KC type is the same as the PL-450/KU type with the exception of following sections.
MISCELLANEOUS PARTS
Symbol & Description
Power supply assembly XWR-047 XWR-048
PU cord assembly PXB-345 PXB-333
Packing case PHH-123 PHH-134
Parts List
Power Supply Assembly (XWR-048)
SEMICONDUCTORS
Mark Symbol & Description Part No.
* D1 PCX-010
(SIRBA10)
CAPACITORS
Mark Symbol & Description Part No.
C1 CKDYF 103Z 50
C2 CEA 221M 25L
TRANSFORMER
Mark Symbol! & Description Part No.
A\ & Power transformer (120V) PTT-168
21

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11.2 PL-450/R, WEM AND WB TYPES
PL-450/R, WEM, WB
Model PL-450/R, WEM and WB types are the same as the PL-450/KU type with the exception of follow-
ing sections.
MISCELLANEOUS PARTS
Part No.
Mark Symbol & Description KU type
A | Power supply assembly XWR-047
A AC power cord PDG-023
A AC power cord assembly Nee fan
PU cord assembly PXB-345
A\ *& *® | Line voltage selector
selector)
Panel PNY-151
Operating instructions (English) PRB-256
Operating instructions (Spanish)
Operating instructions
(English/German/French/Italian)
Screw 3 x 10 (For line voltage rare IPZ30P100EMC
R type WEM type - WB type Remarks
XWR-046 XWR-044
PDG-028 PDG-037
XWR-044
sle'sse eis PDF-212
PXB-333 PXB-333 PXB-333
PSB-011
PNY-152 PNY-151 PNY-151
PRB-256 aye PRB-256
PRC-008
PRE-023
Packing case PHH-123 PHH-122 PHH-122 PHH-122
Parts List
For
R
type
For
WEM,
WB
types
Power
Supply
Assembly
(XWR-046)
Power
Supply
Assembly
(WXR-044)
SEMICONDUCTORS SEMICONDUCTORS
Mark Symbol & Description Part No. Mark Symbol & Description Part No.
*
D1
PCX-010
*
D1
PCX-010
(S1RBA10) (S1RBA10)
CAPACITORS
CAPACITORS Mark Symbol & Description Part No.
Mark Symbol & Description Part No. C1 CKDYE 1032 50
ct CKDYF 103Z 50 C2 eeAeetMeot
C2 CEA 221M 25L
OTHERS
OTHERS Mark Symbo! & Description Part No.
Mark Symbol & Description Part No. A. Power transformer PTT-169
A. ® > Power transformer PTT-170 (220V ~ 240Vv)
(110V ~ 120V, 220V ~ 240V)
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