Pioneer PL-550 Bedienungsanleitung
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MODELPL-550
COMESINTHREEVERSIONS
DISTINGUISHED
ASFOLLOWS:
This seruice
manual isapplicable to the PL-550/5, ST type. When
repairing the PL-550/HGT type please see the manual on pages
43-48.
Type Voltage Remarks
HGT 22OY and240V (Switchablel SEMKO (Sweden),
NEMKO (Norway),
DEMKO (Denmark)
and El (Finland)
approved
model without phono cartridge.
S1
10V,120V,22OVand240V
(Switchablel General
export modelwith phono cartridge
ST 11OV,
120V,22OV
and
240V
(Switchable) Generalexport model without phono cartridge
CONTENTS
1. SPECTFTCAT|ONS.... 4
2. PANELFACILITIES.. . 5
3. PARTS
LOCATIONS
.. .. 7
4. EXPLODED
VIEW 11
5. NOMENCLATURE
OFSCREW,
WASHERSAND
NUT . 16
6. SCHEMATIC
DIAGRAMS,
P.C.
BOARD
PATTERNS
ANDPARTS
LIST
6.1 Schematic
Diagram 17
6.2 DriveControl
Assembly
(PWG-008)
... 19
6.3 PowerSupplyAssembly
(PWR-822) 22
6.4 PositionalDetectorAssembly
(PWX-006) 24
7. PACKING 25
8. OPERATING
PRINCIPLESCIRCUITDESCRIPTION
8.1 BlockDiagram 27
8.2 MotorOperation 29
8.3 Waveforms 36
9. TROUBLESHOOTING
GUIDE
9.1 MotorDoes
NotRotate 37
9.2 MotorRun-away 38
9.3 MotorAlternates
Between
ForwardAnd ReverseRotation 39
9.4 Unstable
Rotation
NearRated
Speed 39
10. ADJUSTMENT
PROCEDURES 40
11. D.D
MOTOREXPLODED
VIEW
..
PL-550
Additional
Service
M'anual Enclosed
Herewith
PL-550X/ST differs from PL-550at the point of cabinet appearance;
it is black cabinet. Except packing case and cabinet all of compo-
nentsaresameas
PL-550.
J
1.SPECIFICATIONS
Motor and Turntable Semiconductors
Motor. ....QuartzPllHall motor lCs... 2
TurntabfePlatter
. .324mmdiam.
aluminum
alloy
die-cast Transistors g
Moment
of Inertia . . . 340kg.cm2
(including
platter
mat) Diodes 11
Speeds . . 33-113
and
45rpm Hall
elements 3
Speed
Control
Range
. . . . . . !6%o
Wow
andFlutter Lessthan
O.O2|yo
(WRMS) Accessories
Signal-to-Noise
Ratio More
than70dB
(D|N-B) 45rpm
Adaptor . . . . . . l
Overhang
gauge . 1
Rotational Characteristics Screwdriver 1
Build-up
Time . . . . . . Within24o"
rotation
at33-1l3rpm Sub
weight l
SpeedDeviation
. . . Lessthan
0.003% Cartridge
mounting
screws
(ST,
HGT
type) . 6
Speedvs.
Load
Characteristics.
. . . Stable
up
to 120
grams Cartridge
mountingnuts
(ST,
HGT
type) 2
drag
load Cartridge
mounting
washers
(ST,
HGT
type) 2
SpeedDrift . . Less
than
0.0003%
lh at 33-1
l3rpm Operating
instructions I _
Lessthan
0.00004%/degree
temp.
change
at33-1l3rpm Miscellaneous
Tonearm Power
Requirements
. . . .Ac 110-120-22o-240y
5ol60Hz
Type . Static-balance
type,
S-shaped
pipe
arm Power
Consumption . . . 5W
Effective
Arm Length . . . . 221mm Dimensions 490(W)
x 1S5(H)
x 390(D)mm
overhang . .
15.5mm l9-sl16(W)
x7-s116(H)
x ls-3ls(D)in.
UsableCartridgeWeight . 49
(min.)
to 14.59
(max.) Weight ,t2kgl26tb6oz
(For
cartridge
weighs
over9.5g,
attachthe
subweight)
Arm HeightAdjust Range t5mm lfLfri"trr"rs and designsubject to possibre
modification
.. without notice,
dueto improuements.
)uDTUnctlons
Anti-skating
force
control
Lateral
balancer
Stylu
s
pressure
direct-readout
counterweigh
t
Arm height
adjustingdevice
Cueing
device
Headshell
stand
Strobe
light
Free
stop
hinges
Insulator
feet
Furnished Cartridge (S type)
Type.. ...MovingmagnettypePC-550E/ll
Replacementstylus. ...PN-550E/ll
StylusTip ...0.3x0.7mildiamond
Output
Voltage. . . . 3mV
(at
1kHz,50mm/s
RMS)
Tracking
Force
. 1.0gto 1.8g
(proper
1.5g)
Frequency
Response 10to 30,000H2
2. PANELFACILITIES
HEADSHELLSTAND
Convenientstandfor storing
a sparecartridge.Aligh
headshell
guidepin with slot
of standandinsert.Avoid
storing
hereif theheadshellistoo largetoallow
thedust
cover
to be closed
fully. The45rpmadaptorcanalsobe
placed
here.
45RPMADAPTOR
Place
on centershaftwhen
playing
45 rpmrecords
(with
large
center
hole).
STROBE
LTGHT---- - '--
-.-'-'"',,*
Lightsto illuminate
stroboscope
when POWER/ARM
ELEVATIONlever
issetto ON.Thestroboscopeappears
to becomestationary
when the QuartzLOCK button is
set
to ON.
PLATTERMAT COVER ]
ARM REST -,--.- -"^.
- -
,
.
-.,,,
-.-.1
Supportsthetonearm.Gently
press
tonearmin direction
shown
by arrow
to clamp.
Be
sure
to clamp
whennot
playing
records.
""'Cf**
@-
PL-E'5cl
QUARTZ
LOCKBUTTON
Quartz
PLLsystem
functionswhenbutton
isdepressedto
ON. Platter
rotation
becomes
precisely
lockedto the
speedselectedbythe
SPEEDbuttons.
SPEEDADJ.CONTROL
Canbe usedto increaseordecreasethespeedwith respect
to theselectedrotation.Set
Quartz
LOCKbuttontoOFF
and
turn thiscontroltowardthe+ directionto increase
speed
(maximum
6%) and towardthe - direction
to
decreasespeed
(maxim
um6ok).
45RPMSPEED
BUTTON
Pressto play
45rpmrecords.
33RPM
SPEEDBUTT'ON
Pressto play
33-1
13
rpmrecords.
POWER/ARM
ELEVATTONLEVER
Combines
power
switchand
tonearmelevationswitch.
OFF..
ON-UP
DOWN
Poweriscutoff.
Power is turned on (platter
rotates).
Whenmovedfrom DOWN to this posi-
tion,thetonearmisraised.
Tonearm
is
gently
lowered.
o
3. PARTS
TOPVIEW
LOCATIONS
Cabinet
PMM-056
Headshell
stand
PNW.O73
PMM-062
(ST
type
ofPL-550X)
Plate
PAN-029
Control
panel
PXT.O98
Knob
(ANTI-SKATE)
PAA.O14
Headshell
assembly
PXA.630
BOTTOM
VIEW
Linevoltage
selector
PSB-001 Power
transformer
PTT,O14
D.D.
motor
PXtV-029
PL-E'5'O
Power
transformer
PTT.O,I4
.a.?
Power
supply
assembly
PWR,822
Drive
controlassembly
PWG.OO8
ii ',,'
tor
I
'*l
,t\* |
Neonlamp
PE
L.OIl
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