Pioneer PL-100 User manual

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Servicec Manual
STEREO TURNTABLE
L-1I00
L-IOOX
Y PIONEER

MODEL PL-100 COMES IN SEVEN VERSIONS DISTINGUISHED AS FOLLOWS:
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AC 220V — 240V United kingdom model (with cartridge)
AC 220V — 240V Oceania model (with cartridge)
AC 110-120/220-240V (switchable) General export model (with cartridge)
© This service manual is applicable to the PL-100/WE, WB, WP, PL-100X/WE, WB. For servicing of the
other types, please refer to the additional service manual.
CONTENTS
:. “SPECIFICATIONS: .4.c5:05.06 ee aes aoe ea 3 8. EXPLODED VIEWS
2:-
‘PANEL
FACILIMNES®
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3.
DISASSEMBLY
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15
3.1
Panel
and
Base
Plate
................
4
9.
SCHEMATIC
DIAGRAM,
P.C.
BOARDS
3.2.
Arm Base
and
Sub-Panel..............
5
a
DISS
RANE
Apacer
4.
MECHANISM
DESCRIPTION
.............
6
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TPAC
MASE,
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16
5.
ADJUSTMENT
9.2
Schematic
Diagram
............+4-:
17
5.1
Auto-return
Adjustment
...........--
8
9.3.
P.C.
Boards
Connection
Diagram
.......
18
5.2
F.G.
Motor
Adjustment
.............-
8
10;
"PACKING
5
iat
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te
hcetacte
teats
19
5.3. Arm-elevation
Adjustment
............
8
6. TROUBLE SHOOTING
6.1 Auto-return Does not Work ........... 9
6.2 Return is Fast (Return at 1mm Pitch)..... 10
7. PRECAUTIONS FOR REASSEMBLY
7.1. Areas That Require Lubrication ....... 10
7.2. Precautions for Attachment of Parts
and Reassembly ..........-20.0e00085 11

1. SPECIFICATIONS
Motor and Turntable
Drive SYStOM) «26-2 con 8S eae Pe eS Ge Sk Pa ee es Belt-drive
IEQNON 5 oe) Sos Sk he wal oe Se ws ie Og Wak a aes FG servo motor
Turntable Platter .....2.. 310mm diam. aluminum alloy die-cast
BOGGS oso he ee we Oe & Be Se Bae Oat eS 33-1/3 and 45rpm
Speed Control Range..............00 202 ee eevee +2%
Wowand Flutter .............. Less than 0.045% (WRMS)
Signai-to-Noise Ratio. ............ More than 70dB (DIN-B)
(with Pioneer cartridge model PC-135)
Tonearm
MV DG <5 .t5, (eee RO SRS ee Static-balance type, S-shaped pipe arm
Effective Arm Length .......... Re Nig cet ag. te aa ah os wy Rapa 221mm
OVGEINANIO: .- & oa See oe ee 5. Se be ee, BAS Bea S hee 15.5mm
Usable Cartridge Weight ............ 4g (min.} to 9g (max.)
Subfunctions
Auto-return mechanism, Anti-skating force control, Stylus pressure
direct-readout counterweight, Cueing device, Strobe light ,Free stop
hinges
Semiconductors
Platter/Rubber platter mat
Speed checking window
a) SPEED SELECTOR BUTTON
45 .... When this button is depressed, the platter will
rotate at 45rpm. Depress for playing 45rpm
records, singles or EP’s.
33 .... When this button is set to the released position,
the platter will rotate at 33-1/3rpm. Release
for playing 33-1/3rpm records like LP’s.
(2) SPEED ADJUSTMENT KNOB
Turn this knob when finely adjusting the speed of the
platter. The speed of platter will increase when the knob
is turned to the left in the direction of “+: it will de-
crease when turned to the right in the direction of *—”,
PL-100
Miscellaneous
Power Requirements:
WE,WB,WP models ......... AC 220—240V ~, 50, 60Hz
Power Consumption ............0...002..0 00-544 4WwW
Dimensions ............... 420(W) x 96(H) x 365(D) mm
16-1/2(W) x 3-13/16(H) x 14-3/8(D) in.
WeIQNE -6 oo oie So SRR Se Re SE ... 5.2kg/11 Ib 80z
PC-110/I! Specifications
WV OO SS -n och ee ke a eS Ri a ae a Moving magnet type
SEVIS: 05 ods ta8: hs Bees ech etc at ad 0.5 mil diamond (PN-110/I!)
Output Voltage..... 3.5mV (1kHz, 50mm/s Peak velocity, LAT)
Tracking Force ............... 1.59 to 2.59 (proper 2.2g)
Frequency Response .................. 15 to 25, OO0Hz
Recommended Load............... 50k2 +170 ~ 300pF
Accessories
EP AGsptet 6 osc. 6 tg tng fh kk & Oho el ee ae Peeks 1
Operating Instructions (French and German
furnished on model forWE) ...................... 1
NOTE:
Specifications and design subject to possible modification without
notice, due to improvements.
Anti-skate knob
3) ARM-ELEVATION LEVER
UP(¥): When this fever is set to this potion, the
tonearm will rise. Set it to UP before record
play and when you want to stop ncord play
while a track is being played or ashen you
want to change over to a different track.
DOWN (¥): When the lever is set to this pojtion the
tonearm will be lowered. If itis set to
DOWN for record play, the tonearm will be
lowered onto the surface of the record, and
play will begin.

3. DISASSEMBLY
3.1 PANEL AND BASE PLATE
1. Undo the 4 screws @ securing the insulator case.
2.Move the tonearm across to the center, and
raise the panel a little.
3. Disconnect the circuit board connector (2-Pin).
Base plate
Float spring (GRE)
Float spring
_§
Insulator case _& “
(VLT)
° &
0
Float spring
Damper rubber ! I
Float spring
(BLK) S-
(VLT) :
~ 0
Fig. 3-1 Remove the panel and base plate
EME HR EEA REE,

3.2 ARM BASE AND SUB-PANEL
1. Undo the 5 screws @ securing the arm base.
2. Undo the 2 screws @ securing the sub-panel.
3. Undo the 3 screws © securing the center shaft.
Arm base
Tonearm
assy
Base plate
Fig. 3-2 Remove the arm base and sub-panel
PL-100

4. MECHANISM DESCRIPTION
PL-100 MECHANISM OPERATING
The PL-100 is equipped with auto-return only.
Fig. 4-1 shows the PL-100 in the stationary state
with the tonearm back in the arm rest.
Gear A
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Fig. 4-1 Mechanical parts name
* Start of Play Lever A
1. When the tonearm is moved across to the disc,
the PU plate located below in the arm base is
also moved.
2. Lever A is moved over by pin A connected to
this PU plate, resulting in lever B being un-
locked (Fig. 4-3).
3. At the same time that lever B is unlocked, the
microswitch is turned on (power on), and the
motor commences to rotate (Fig. 4-3).
Pin A
Microswitch
Fig. 4-3 Start of play
* AUTO-RETURN DETECTION
1.When the stylus nears the center shaft, pin B
contacts plate A (Fig. 4-4).
2. Plate A pushes plate C by an amount directly
proportional to the amount of movement of
ee, He the tonearm (Fig. 4-5).
Figen erent 3.Plate D atop plate C is moved toward gear B
by the movement of plate C.
pant Ricithe ARERR,

Fig. 4-5 Auto-return detection 2
Gear B
Plate D
Dav.
W/ Ce
» CE
Fig. 4-6 Auto-return detection 3
Gear B
feces q| Gear A
Yi. >. Plate D
ya
/ Del
SA
Fig. 4-7 Auto-return detection 4
PL-100
4.The front end of plate D moves approximately
O.lmm when the stylus is advanced 1mm
toward the center shaft by one revolution of
the record.
5.The tooth of gear B has the dimensional dif-
ference shown in Fig. 4-6.
6.Plate D is pushed back by this dimensional
difference at a stylus movement of within 1mm
per revolution of the record.
7.When the stylus enters the lead-out groove in
the record at the end of the performance, it is
moved 4mm toward the center shaft by one
revolution of the record.
8.The end of plate D contacts the protruding
section of gear B (Fig. 4-7).
9. Gear B and gear A are engaged, and gear A is
turned by rotation of the turntable.
* AUTO-RETURN
1. Gear A and B are engaged each other by the
auto-return detector and gear A consequently
is turned in the counter-clockwise direction.
2. Plate B is then shifted across towards the tone-
arm due to the groove in the underneath of gear
A.
3.The edge of plate B pushes against lever C to
force the arm elevation upwards.
4. Plate B continues to shift across to push- against
pin B on the PU plate, thereby returning the
tonearm back to the arm rest.
o. At this stage plate B commences to return to-
ward the center shaft guided by the groove in
gear A.
Gear B
Gear A
ig
eet RRR
Fig. 4-8 Auto-return 1
6. When the edge of plate B separates frorm lever
C, the arm elevation is lowered to drop the
tonearm back into the arm rest.
7.And at the same time that the tonearm is
returned to the arm rest, pin A returns Jever A
back to the stationary state.

8.Plate B continues to move toward the center
shaft and pushes against pin C on lever B. Lever
B thus switches the microswitch off (power
off), and is then locked by lever A, thereby
bringing a complete operation cycle to an end.
5. ADJUSTMENT
9.1 AUTO-RETURN ADJUSTMENT
1.Turn the auto return adjustment screw full
around clockwise.
2. Move the tonearm right across toward the
center.
3.When the auto return adjustment screw is
turned back a little at a time counter clockwise,
the tonearm will commence to return to the
outer circumference.
4.Stop turning the adjustment screw once the
stylus tip is 383mm away from the center shaft.
5. Once the above adjustment procedure has been
completed check that the tonearm returns auto-
matically as designed.
5.2 F.G. MOTOR ADJUSTMENT
1. Turn the power on and start the turntable plat-
ter rotating.
2. Turn the speed adjustment knob around to the
mechanically center position.
3. Adjust VR2 and VR83 in the motor assembly
so that the stroboscope appears to be stationary.
Again this adjustment is performed from below.
4. Adjust VR2 for 33rpm speed, and VR3 for
45rpm. |
5.3 ARM-ELEVATION ADJUSTMENT
To proceed with the elevation sheet height
adjustment, insert the hexagonal wrench (for 3
mm) into the hole at the front of the EV sheet and
rotate it clockwise to reduce the height and coun-
ter-clockwise to increase the height. The height
of the stylus tip from the record surface is 7
+2 mm.
Fig. 4-9 Auto-return detection 2
_ river
3
wy
Fig. 5-2 Motor adjustment
Elevation sheet
Fig.
5-3
Arm-elevation
adjustment

PL-100
6. TROUBLE SHOOTING
Use the following directions to find the cause
of each type of breakdown. Improperly adjusted
units should be completely readjusted.
6-1 AUTO-RETURN DOES NOT WORK
START
Change in starting position adjust-
ment.
Plate
D
does
not
follow
the
plate
C
After starting, incomplete reset of
the plate C. See @ Too much grease between the plate
C and the gear A.
The curved section of the plate C
is deformed. Inner diameter of the plate D bear-
ing is small.
The inner areas of records can not
be tracked. Protrusions on the caulk section
of the plate D bearing.
Arm lead wire is caught on some-
thing.
Not enough grease between the
plate D and plate C.
PU cord is touching the PU plate.
Looseness in the PU plate attach-
ment.
PU plate is touching the leaf spring
(plate D)
Operation of the plate A is not
smooth.
Procedure for Dealing with item @
After performing the return operation, if the
curved section of the plate C and curved section
of the plate D are not in contact with surfaces
and (B) respectively of the cam, reset will be | select
incomplete and the starting position will be late. Gear A 0.5mm
As a result, the return function may not operate
at times. In this case, bend the plate C C) so that Fig. 1-6 Incomplete plate D and plate C.
dimension A is 0.5mm or larger.

6.2 RETURN IS FAST (RETURN AT 1mm PITCH)
Protrusions on the pinion gear sec-
tion. See @
Procedure for Dealing with Item @
If there are rough areas of plastic protruding
from the @) section of the protruding section of
the pinion gear, the return function may operate
at a pitch of only 1mm. In this case, remove the
plastic protrusions completely (Fig. 6-2).
Gear B
(pinion gear)
protruding
section
Fig. 6-2 Elimination of pinion
gear protrusions.
7. PRECAUTIONS FOR REASSEMBLY
Follow these directions and precautions when
reassembling a unit after completing repairs. Be
sure to lubricate as required, make no mistakes
when attaching parts, and avoid all other careless
mistakes that may be the cause of trouble later on.
7.1
AREAS
THAT
REQUIRE
LUBRICATION
NOTE:
Types of lubricants and areas where they are used are
listed in table 1.
Table 1
Type of Oil Areas used
|
Silicon Oil #50000 raising shaft
GYA-008 all other areas
Lubrication points are specified for oils other
than GYA-008. Never use a different type of oil.
® Cam Section
Apply oil to the heart-shaped grooved section
(rear side of the cam) and lock plate sliding section
in order to minimize wear on the sliding section
and the burden on the mechanism.
@ Driving Plate Assembly
Decrease the burden on the mechanism and the
wear on the sliding section.
sides, top, and bottom surfaces
(sliding section of auto-stop
mechanism)
sides surface
(sliding section of
auto-stop mechanism)
top and side
(sliding section of
auto-stop mechanism)
EV cam side surface
(sliding section of elevation cam)
Fig. 7-1 Driving panel assembly section Switch Locker
Section
10
® Switch Locker Section
Apply oil to the switch locker (opening) and
sub-panel base sliding section to decrease the
burden on the mechanism.
When applying oil to the opening (shaft hole),
do not apply any oil 2—3mm from the bottom
surface. If oil is applied 2—3mm within the
bottom surface, it may come out the bottom and
go between the switch lever and sub-panel base
causing the switch lever to operate ineffectively.
switch locker
Fig. 7-2 Switch locker section
e EV Lever Unit Section
Apply oil to the sliding sections of leaf spring
(A) and EV lever unit to decrease the burden on
the mechanism.
leaf spring (A)
sliding section
EV lever unit
EV lever unit
sliding section
Fig. 7-3 EV lever unit section