Pioneer PL-560 User manual

c/Manual
Service
motor
QuartzPLL DIRECT DRIVE 2
FULL AUTOMATIC TURNTABLE
PL=-560
Y PIONEER

For details of operation of the mechanism and electronic circuitry of
the PL-560, refer to the manuals listed below.
1. Operation of mechanism .............. PL-520
2. Operating principle of phono-motor ..... PL-630
MODEL PL-560 COMES IN FIVE VERSIONS DISTINGUISHED AS FOLLOWS:
Voltage Remarks
120V only Canada model (without cartridge) ;
120V only U.S.A. model (without cartridge)
220V and 240V (switchable) Europe or Oceania model (without cartridge)
110V, 120V, 220V and 240V (switchable) General export model (without cartridge)
110V, 120V, 220V and 240V (switchable) U.S. Military model (within cartridge)
@ This service manual is applicable to the PL-560/KUT, KCT. For servicing of the other types La
please refer to the additional service manuals.
CONTENTS
To SPECIFICATIONS: 4.4545 uae aie eee teu oe 3
2. FRONT PANEL FACILITIES ............. 4
BS: PARTS. LOCATION § x6 ih beta cous, devadce aac 6
4: DISASSEMBLY 2: dvd parhtraceck untae eadee 6 |
5.
MECHANISM
ADJUSTMENT
.............
8
|
6. ELECTRIC ADJUSTMENTS .............. 10
7. EXPLODED VIEWS
TiV> “AGADINO: ahaiglac Seay ede te oe ees 11
dia. Bottom Plate... ace-tas.e oe 8 ee eee se 8s 12
7.3. Arm Base ...... Bi to Ue silcths oh deathecal iB te Maat 13
7A. Soulb Parte). 4..0000. 2 vas bese Fe Sas 15
So PACKING: <o-64 084.0040 Vee see es we tae ea 16
9. SCHEMATIC DIAGRAM, P.C. BOARD
PATTERNS AND PARTS LIST
9.1 Schematic Diagram ..............205- 18
9.2 P.C. Board Connection Diagram ........ 20
9.3. Drive Control Assembly (PWG-017) ...... 23
9.4 Control Assembly (PWX-028) .......... 24
9.5 Oscillator Assembly (PWX-022) ........ 25
9.6 Power Supply Assembly ............-. 26
10. D.D. MOTOR EXPLODED VIEW ........... 27

1. SPECIFICATIONS
Motor and Turntable
DEWE- SV SION ag th. Lt See alee aes ie Direct-drive
MOO 0 & a. Rae aGala etter me Quartz PLL Hall motor
Turntable Platter. . . 320mm diam. aluminum alloy die-cast
Moment of Inertia... .. 280kg-cm? (including platter mat)
SHECUS a5. ge ee ewes Poe Oe 33-1/3 and 45rpm
Speed Control Range.....................2. -£6%
Wow and Flutter........... Less than 0.025% (WRMS)
Signal-to-Noise Ratio. ........ More than 73dB (DIN-B)
(with Pioneer cartridge model PC-400)
Rotational Characteristics
Build-up Time ...... Within 120° rotation at 33-1/3rpm
Speed Deviation ................. Less than 0.002%
Speed vs. Load Characteristics... . Stable up to 200 grams
drag load
Speed Drift ....... Less than 0.00008%/h at 33-1/3 rpm
Less than 0.00003%/ degree temp. change at 33-1/3rpm
Tonearm
Type........00% Static-balance type, S-shaped pipe arm
Pffective Atm Length ics wy aed Gis oo eke s 221mm
Over han sy ooo aioe SAA lola bp oat ed 15.5mm
Usable Cartridge Weight....... 4g (min.) to 10g (max.)
Subfunctions
Full auto mechanism
Anti-skating force control
Stylus pressure direct-readout counter weight
PL-560
Cueing device
Strobe light
Pitch indicator
Free stop hinges
Semiconductors
Ne ein a. ig Se oe. 4 aS es wa Renita eee wae 4
UP AMSISUONS a deed a: See aokegote gk gigas Sc e892 dete ge oa teas -
DI OUCS 3 oo. Fb te aor ay Klein eee Seek ee 5
Fiat ClCINGO bse gins 3S ot avert: Glencwin Ei: em yee Oe 3
Accessories
EON AD LOR a8 geet? et Are cant Wer we eodca kn Sah obey we sad 4 1
DCECW UMINEY 4. 20e cat tay casts Seki Se Hechinger eg oe Bek 1
Cartridge mounting screws ...........0000 0000s 6
Cartridge mounting NUTS. as a4.6)s c0ewawe Ye Ge LER Y A Z
Cartridge mounting washers ..............-00006 2
Operating 1NStructions 4.04 ys oh es BE Bo SS ]
Miscellaneous
Power Requirements ............... AC 120V, 60Hz
Power CONSUMDIION: 503.4 9a 4 64 Sete ewe BA 12W
Dimensions ........... 440(W) x 145(H) x 365(D)mm
17-15/16(W) x 5-11/16(H) x 14-3/8(D) in.
WING. sutatat c Sipty aap guste ade ret As 10.5kg/23lb 2 oz
NOTE:
Specifications and design subject to possible modification
without notice, due to improvements.

2. FRONT PANEL FACILITIES
@ CUT BUTTON
Push this button to stop the record play. When pushed,
the tonearm will rise and return to the arm rest. The
power to the turntable will then be switched off and a few
seconds later, the platter will stop rotating.
NOTE:
If the REPEAT button is pushed, the tonearm will
return to the arm rest and then move across again to the
record.
(@ REPEAT BUTTON
Push this button when you want to listen to the same
record again. Press the button once more to release.
NOTE:
All you have to do for repeat play is to press the
REPEAT button. There is no need to push the START
button again.
@) START BUTTON
The
power
to
the
turntable
is
turned
on
and
the
platter
starts
to
rotate
when
this
button
is
depressed.
@ SPEED SELECT SWITCH
45 .... When this switch is depressed, the platter will
rotate at 45rpm. Depress for playing 45rpm
records, singles or EP’s.
33 .... When this switch is set to the released position,
the platter will rotate at 33-1/3rpm. Release for
playing 33-1/3rpm records like LP’s.
(6) QUARTZ LOCK SWITCH/PITCH CONTROL
KNOB
@ When the Quartz LOCK switch is pushed downward,
the Quartz PLL will actuate and the strobe light comes
on. Normally use it in this position.
The turntable will rotate at the precisely rated speed
according to the SPEED SELECT switch.
@ When the Quartz LOCK switch is pulled upward, the
Quartz PLL will be released and the strobe light goes
off and pitch meter lamp will light up.
If the PITCH CONTROL knob is turned at this
position, the rotating speed of the turntable will be
adjusted up to 6% faster or slower than its rated speed.
If the knob is turned in the (+) direction, the turntable
rotates faster, and if the knob is turned in the (—)
direction, the turntable rotates slower than its rated
speed. The variation of the rotating speed can be read
out on the PITCH METER.
(Refer to “PITCH CONTROL”)
Dust ee \
\ies
Rubber platter mat
Platter
PITCH CONTROL
In normal circumstances, the platter rotates at the
rated speed when the Quartz LOCK switch is kept at
ON. If you want to vary the speed, set this switch to
OFF and turn the PITCH CONTROL knob. If the
platter rotates faster than its rated speed, the musical
intervals of the reproduced sound will be come
higher, and if it rotates slower, they will become
lower.
Nowadays, there are slight variations in the orchestra
and other tuning sounds recorded on discs. Further-
more, pianos and other musical instruments for the
home are tuned to high international standards and
so there are slight discrepancies in the musical
intervals when practicing on the piano along with a
record. This turntable features a pitch control which
allows you to compensate for the slight variations in
the musical intervals by making the platter rotate up
to 6% faster or slower than its rated speed. The com-
pensation can be checked by ear. An adjustment of
+6% is equivalent to about a semitone. |

PL-560
| RECORD SIZE SELECTOR
This selector selects the size of the record for automatic
play and also selects manual play.
\ Fonesin 17. 7” .... For the automatic play of 17cm (7-inch)
LP and EP records.
= ANTI-SKATE knob 25 NOs aoe For the automatic play of 25cm (10-inch)
Arm elevater LP records.
geil BOT 2 ee eis For the automatic play of 30cm (12-inch)
WY LP records.
MANUAL ... For the manual play of records.
NOTE:
The tonearm will not be actuated when the RECORD
SIZE
selector
is
at
the
MANUAL
position
for
play, even if the START button and the REPEAT
button are pushed.
ARM ELEVATION LEVER
This lever controls the ascent and descent of the tonearm.
BIUP) ices The tonearm rises.
Y(DOWN) ... The tonearm descends gently.
Set to this position for auto play, auto
repeat and other automatic operations.
NOTE:
When the ARM ELEVATION lever is set to the UP
position for automatic play, the tonearm will move over
as far as the lead-in groove on the record but it will not
descend and the record will therefore not be played.
PITCH METER ARM REST
When the Quartz LOCK switch is set to OFF, the pitch The arm rest supports the tonearm when it is not being
meter lamp will light up, and the variation in the rota- used. Set the tonearm on its rest when it is not playing
tional speed of the platter in respect to its rating (33-1/3 records. Clamp it into position if you don’t have any
or 45rpm) can be read out on the meter. immediate plans to play records (see Figure).
hy
Releasing the arm Securing the arm clamp
clamp
STROBE LIGHT
When the Quartz LOCK is set to ON, this light comes on
and lights stroboscopically. Then, the turntable rotates at
its rated speed and so the strobe dots remain stationary.

3. PARTS LOCATION
Plate-L Plate-R
PNW-338 PNW-339
Main weight assembly
PXA-708
Power transformer
PTT-053 (KUT) Tonearm assembly
PTT-054 (KCT) PPD-577
Meter assembly
PAW-003
Knob
PAA-035
Cabinet Push button knob
~PMM-159 PAD-039
Power supply assembly
PWR-044 (KUT)
PWR-045 (KCT)
Headshell assembly
PXA-693
Oscillator assembly
PWX-022
4. DISASSEMBLY
® Tone arm
Remove the arm base from the cabinet while
refer-ring to the disassembly drawing on Page 11.
1. Unsolder the leads coming out from the tone
arm.
2. Remove the P.U. plate by loosening the two
mounting screws.
3. Loosen the tone arm fixing screws using a
hexagonal wrench, and then remove the tone
arm.

PL-560
@ Foot spring
Remove the spring stopper using a screwdriver,
as shown in the diagram.
Fig. B
® Timing motor
. Remove the sub-panel.
.
Remove
the
cam
from
the
shaft
of
the
gear
motor.
3.
Using
cutting
pliers,
cut
off
the
aluminium
rivets
securing
the
gear
motor.
4.
When
reinstalling
the
gear
motor,
use
two
N3
nuts
and
PSA8x8
screw
in
place
of
the
rivets
cut
off
in
3.
above.
Ne
Fig. C
Fig. E

5. MECHANISM ADJUSTMENT
Prior to making any adjustments, check that the
PU plate shaft is located in the center of the cut
out section of the sub panel (as shown in Fig. 1
below).
Cut out section of =
sub panel
PU plate shaft
Fig. 1
Tonearm Descent Positions
The tonearm descent positions may be adjusted
by turning the adjustment screws located in the
panel holes at the base of the tonearm pivot (see
Fig. 2 ).
When turned clockwise .. the descent position is
center.
When turned counter clockwise ...............
the descent position is
moved outwards.
This is quite a simple operation when a test
record is used.
For 80cm records ...... tonearm descent should
occur in the 304 to 319
count range.
For 25cm records ...... tonearm descent should
occur in the 252 to 267
count range.
For 17cm records ...... tonearm descent should
occur in the 173 to 184
count range.
ey,
Tonearm descent position ~
adjustment screws
The tonearm must be
returned to the arm rest
to provide access to
these screws.
Fig. 2-a
Turn adjustment screw in the
counter clockwise direction
Turn adjustment screw
in the clockwise direction
OD D
Ss
oo
ed
AAA
Descent position
too far inside
Descent position
too far outside
Fig. 2-b
When Tonearm Fails to Return
1. Adjust the stopper angle so that it makes
contact with the return lever pin (Fig. 3).
Return lever
Stopper angle
Fig. 3
Arm Elevation Adjustment
1. Leave the tonearm in the up position, and
adjust the height of the arm elevation sheet so
that the gap between stylus tip and record
surface is about 10mm. (Fig. 4).
Arm elevation sheet
Fig. 4

Auto Return Lift Off Position
First check that the turntable pin (attached to
the turntable) has not been bent over. Strighten
out if necessary.
1. Tonearm lifts off too soon.
Unscrew the screw in the tip of the PU plate
by a suitable amount (Fig. 5).
2. Tonearm too slow in lifting off
Screw the PU plate tip screw in further (Fig.
5).
Screw in tip of PU plate Sending plate
Screw driver
Fig. 5
Faulty Tonearm Movement
If the tonearm is interfered with, or halted
altogether during the lead in operation, tighten up
the screw shown in Fig. 6.
NOTE:
This adjustment screw should be made neither too tight
nor too loose.
Q
eee
Bracket = <—
Nut
Plate spring Operations plate
Fig. 6
Shorting Switch
Adjust the switch mounting screw so that the
gap between contacts during play is 0.5mm (Fig.
7).
Screw dirver
Spring mounting screw
(for adjustment)
—-
Fig. 7
PL-560

6. ELECTRIC ADJUSTMENTS
6.1 SPEED ADJUSTMENT WHEN QUARTZ
LOCK IS OFF
1. Put the quartz lock off.
2. Turn the ADJUST knob on the control panel to
the mechanical center position.
3. Insert a screwdriver through the small hole in
the baseplate of the player, and turn the semi-
fixed speed adjustment potentiometer VR: until
the strobe pattern on the turntable becomes
stationary.
6.2 ADJUSTMENT OF D.D. MOTOR
OPERATING POINT
@ Adjustment Conditions
Connect the SP and TP23 terminals of PWG-017
to each input of a double image oscilloscope
(synchroscope). Put the turntable in the Quartz
Lock ON condition, and then start it up.
® Method of Adjustment
1. Observe the output waveforms from SP and
TP23 (Fig. 8). (Two output pulses from terminal
TP23 will correspond with one pulse from
terminal SP.
2. Adjust the semi-fixed resistor in the control
circuit assembly (PWG-017) so that the rising
part of the pulse which comes out of terminal
TP23 fits into the middle of the pulse which is
generated at terminal SP. For 33-1/3 rpm, adjust
VR21. For 45 rpm adjust VR22.
Waveform
at TP23 terminal
Waveform
at SP terminal
Fig. 8
10
6.3 METER ADJUSTMENT
ds
Adjustment Conditions
Connect a frequency counter between the TP1
and Gnd terminals of the oscillator assembly
(PWX-022).
. Turn the speed adjust knob to its mechanical
center.
3. Put the Quartz Lock off.
. Adjust VR3
Adjustment
. Put the speed selector button in the ‘45”
position.
. Turn VR in the oscillator assembly (PWX-022)
until the reading on the frequency counter
becomes 750.0Hz.
. Turn VRz2 in the control assembly (PWX-028)
until the meter reading becomes zero.
. Put the speed selector button in the “33”
position, and turn VR: until the meter reading
becomes zero.
. Turn the speed adjust knob until the reading
on the frequency counter becomes 795Hz
(750Hz +6%).
so that the meter indication
becomes +6%.