Pioneer PL-2 User manual

Te,
Setvice
PALEY ET
REPAIR
&
ADJUSTMENTS
ORDER
NO.
ART-713-0
STEREO TURNTABLE
L-2_
PL-120
MODEL
PL-2
COMES
IN
SIX
VERSIONS
DISTINGUISHED
AS
FOLLOWS:
Voltage Remarks
120V
only
U.S.A.
model
(Without
cartridge)
120V
only
Canada
model
(Without
cartridge)
—
WE
220V
—
240V
Europe
model
220V
—
240V
United
kingdom
model
220V
—
240V
Oceania
model
110V—120V/220V—240V
(Switchable)
General
export
model
MODEL
PL-120(which
is
minor
change
in
design
from
PL-2)
COMES
IN
FOUR
VERSIONS
DISTINGUISHED
AS
FOLLOWS:
220V
—
240V
Europe
mode!
220V
—
240V
United
kingdom
model
220V
—
240V
Oceania
model
110V—120V/220V—240V
(Switchable)
General
export
model
=
This
is
the
service
manual
for
model
PL-2/KUT.
For
servicing
of
the
other
types,
please
refer
to
the
additional
service
manual.
=
Ce
manuel
d‘instruction
se
refére
au
mode
de
réglage,
en
francais.
=
Estemanual
de
servicio
trata
del
método
de
ajuste
escrito
en
espanol.
PIONEER ELECTRONIC CORPORATION! 4-1. Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
U.S. PIONEER ELECTRONICS CORPORATION 6&5 Oxford Orive, Moonachie, New Jersey 07074, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Luithagen-Haven 9, 2030 Antwerp, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
FU © APR. 1981 Pint sed in Japan

a
For
the
circuit
and
mechanism
descriptions,
please
refer
to
the
supplement
of
model
PL-7
service
manual
(ART-768).
CONTENTS
1, SPECIFICATIONS .2%.cex weds 4 be eee wes 2
2. FRONT PANEL FACILITIES.............. 3
Gs: DISASSEMBLY se ssnak ing. eS soceare. geet et ots 4
4. TROUBLESHOOTING ..............0005. 6
5. PRECAUTIONS FOR REASSEMBLY......... 8
6. ELECTRICAL PARTS LIST.............. 10
7. P.C. BOARD CONNECTION DIAGRAM...... 11
1. SPECIFICATIONS
Motor and Turntable
Drive SystOm 6.446 Se Pewee Ee we Hw SH le Belt-drive
WONG siege Bog eae Se Ay ee 8 Ok Bok See ees DC motor
Turntable Piatter ....... 310mm diam. aluminum alloy die-cast
DP RCGS x 8s Cader ab A ae ey le be ae SE eck 3d 33-1/3 and 45rpm
Wow and Flutter .............. Less than 0.05% (WRMS)
Signal-to-Noise Ratio. .........2... More than 68dB (DIN-B)
(with Pioneer cartridge model PC-220)
Tonearm
MEY cs Sth a So ct tees ae 3s Static-balance type, Straight pipe arm
Effective Arm Length ............,.....004. 221mm
OVOCIVANG e253 i eh, ed ee eee ee es Ge Ot eo es 15.5mm
Usable Cartridge Weight ...... . 3a (min.) to 8g (max.)
Subfunctions
Auto-return mechanism, Anti-skating force contro!, Stylus pressure
direct-readout counterweight, Cueing device, Free stop hinges
8. SCHEMATIC DIAGRAM ................ 12
9. EXPLODED VIEWS ....6.40 625 coi bees 14
TO APACKING:s.2. 22 5 dh ace a) & dard, & dee oe & Oh St 18
1d: ADJUSTMENTS £54 c wea sd BES aas DAs ¥ 19
REGULAGE 5k caaacie eee oe ecey aet 22
PSUISTE ieee oa ee ko ele ee als 23
Miscellaneous
Power Requirements.................. AC120V, 6OHz
Power Consumption 2 4.66 3066 Ge ers BA ER SL ES Su 3W
Dimensions .............., 420(W) X 108(H) X 367(D)mm
16-1/2(W) x 4-1/4(H) X 14-7/16(D)in.
WV SIE cs oes sa, Ses ee ee, Bt ae eo i Ge dee he Ge 5.1kg/11 tb 4 oz
Accessories
EP AGapIer: a. 2 a: fos: whle eh ete ea OMe eb Oe Oe A a ik 1
Operating Instructions... ......000...0. 20.0000 2 eee. 1
NOTE:
Specifications and design subject to possible modification without
notice, due to improvements.

2. FRONT PANEL FACILITIES
fox
X = “~
X S, ee \
co a
\ Se
~
\
12)
a)
(j—
e/
(1) SPEED switch |
Set this switch in accordance with the speed of the re-
cord which is to be played.
[33] (depressed position): For 33-1/3 rpm records
[45] (released position): For 45 rpm records
(2)Cartridge
(3) Headshell
(4) Tonearm
(5) ARM ELEVATION lever
Operate this lever when starting record play or when
temporarily suspending play.
(6) ANTI-SKATE control
This
is
rotated
when
performing
the
anti-skating
adjust-
ment.
6)
ae
S)
(4)
(3)
Q)
(7) Arm rest
This serves to hold and clamp the tonearm. When
moving the tonearm, release the clamp.
Tracking force adjustment weight
This is used when adjusting the tracking force.
(9) Platter
(0) Platter mounting shaft
(1) Rubber mat
(2 EP adapter
This
is
used
when
playing
records
without
a
‘‘middle.”
43) Cabinet
(4) Dust cover

3. DISASSEMBLY
3.1 PANEL AND BASE
In removing the panel, follow the below listed
steps in the order given. Using any unnecessary
force will result in bending the springs or damaging
other parts.
Panel removal steps
1. Remove the headshell and weight assembly,
and the weight shaft assembly.
The weight shaft assembly is removed by
loosening screw (Hexagone socket screw)
and the headshell by loosening screw @.
2. Lift off the turntable platter.
Turntable
platter
oe
;
Pane!
Motor assembly;
CO ~1 OS
Dust cov
Y er
. Loosen insulator attachment screws @ and
remove the insulator. (Do not mix the color-
coded float springs. They must be replaced
with their original insulators during reassemb-
ly.)
. Remove the rear panel PU cord strain relief.
. Lift the front section of the panel (operating
controls) very slightly
. Unplug the 2p connector.
. Completely remove the PU cord fromthe panel.
. Taking care not to damage the tonearm,
remove it from the panel. (Hold the tonearm
steady.)
Weight assembly
®
Screw.
a Rubber bush
oa Weight shaft assembly
we
Control mechanism
Fig. 3-1 Disassembly

3.2 TONEARM
1. Disconnect the tonearm lead wires from the
PU board (See Fig. 3-2).
Note that some of the lead wires have been
soldered to the PU board, and must be discon-
nected with care.
2. Loosen the set screw @ with a screwdriver to
remove the PU plate under the arm base
(See Fig. 3-3).
3. Undo the screw @ securing the tonearm to the
arm
base
(See
Fig.
3-3).
3.3 TONEARM SECTION
Remove the tonearm section by taking out the
three arm base attachment screws @ and one
ground wire securing screws @.
3.4 CONTROL MECHANISM SECTION
After the tonearm section has been removed,
loosen the three control mechanism attachment
screws @ and remove the assembly.
Tomearm
Screwdriver
3.5 PANEL AND BASE REASSEMBLY
1. Attach the PU cord stopper.
2. Attach the insulators. (Make certain the color-
coded float springs are attached to the correct
insulators.)
3. Attach the weight shaft assembly.
Tonearm
lead wires
PU board Red
Fig. 3-2 Disconnect the tonearm lead wires
_S-@
_ (Hexagone socket screw)
~ (2 PU plate
Fig. 3-3 Remote tonearm

4. TROUBLESHOOTING
Use the following directions to find the cause of
each type of breakdown. Improper adjustment
units should be completely readjusted.
# AUTO-RETURN DOES NOT WORK
Change in starting position adyjust-
ment.
Starting plate does not follow the N
signal plate.
YES
YES
After starting, incomplete reset of the
signal plate. (See section 1)
YES
The inner areas of records can not
be tracked.
YES
Looseness in the PU plate attach-
ment.
Section 1
After performing the return operation, if the
curved
section
of
the
signal
plate
and
curved
sect-
ion
of
the
starting
plate
are
not
in
contact
with
surfaces
(A)
and
(B)
respectively
of
the
cam,
reset
will
be
incomplete
and
the
starting
position
will
be
late.
As
a
result,
the
return
function
may
not
operate
at
times.
In
this
case,
bend
the
signal
plate
C)so
that
dimension
A)
is
0.5mm
or
larger.
6
NO
Inner diameter of the starting plate
hole is small.
2 Too much grease between the signal
hole is small.
Protrusions on the caulk section of
the starting plate hole.
Not enough grease between the
starting plate and signal plate.
NO
The
curved
section
of
the
signal
plate is deformed.
PU cord is touching the PU plate.
Arm lead wire is caught on something.
Operator of the detection lever is
not smooth.
Signal plate
Cam
Fig.
4-1
Incomplete
reset
of
starting
and
signal
plates.

# RETURN IS FAST (RETURN AT 1mm PITCH)
Protrusions on the pinion gear section
(See Section 2)
Section 2
If there are rough areas of plastic protruding
from the ‘A) 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. 4-2).
Pinion gear
protruding
section
Fig. 4-2 Elimination of pinion gear protrusions
# MOTOR DOES NOT ROTATE
2P connector is not attached.
Connector is not properly installed.
=» MOTOR DOES NOT STOP
The switch lever and switch locker
are not locking (See section 3).
Section 3
In order to turn the power OFF, the PU plate
shaft touches surface (A) of the switch locker
pushing it over so it locks with the switch lever
turning the microswitch OFF (Fig. 4-3). If
the amount of push on the switch locker is insuf- A
ficient, it can not lock with the switch lever.
With the tonearm locked in the arm rest, as shown
The installation location of the PU
plate is incorrect.
PU plate
Switch
locker
in figure 4-4, attach the PU plate precisely mid- Sitch lever
way between the first and second points from the
arm base scale mark counting away from you. Fig. 4-3 Adjustment of switch lot er
Arm base
scale mark
Fig. 4-4 Adjustment PU plate

5. 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.
5.1 AREAS THAT REQUIRE LUBRICATION
NOTE:
Types of lubricants and areas where they are used are
listed in table 1.
Table 1
Areas used Type of Oil
raising shaft
—_
all other areas
Silicon Oi! #100000
(GEM-002)
GYA-008
Lubrication points are specified for oils other
than GYA-008. Never use a different type of oil.
e 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.
e 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)
EV cam side surface
(sliding section of elevation cam)
Fig. 5-1 Driving panel assembly section
© 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. 5-2 Switch locker section
e EV Lever Unit Section
Apply
oil
to
the
sliding
section
of
leaf
spring
(A)
and
EV
lever
unit
to
decrease
the
burden
on
the
mechanism.
Leaf spring (A)
S</ sliding section
a
aN
ie
EV lever unit
EV lever unit
sliding section
Fig. 5-3 EV lever unit section
e Elevation Cam Section
Apply oil to the elevation cam and sliding sec-
tion of the raising shaft to decrease the burden
when operated.
Elevation cam
Fig. 5-4 Elevation cam section
e EV Sheet Section
Apply
oil
to
the
raising
shaft
and
sliding
section
of
the
bearing
to
assure
stability
in
the
eJevation
lowering
speed.

Apply all around
at a width of 1mm
Half of the grooved
section
EV sheet assembly
Fig. 5-5 EV sheet section
5.2 PRECAUTIONS FOR ATTACHMENT OF
PARTS AND REASSEMBLY
e Motor Attachment
When installing the motor, set the cam in the
mechanism stop location and verify that the
starting plate section B does not protrude be-
yond surface A of the cam. If the motor is at-
tached with the starting plate section B protrud-
ing, the starting plate may be deformed, the motor
pinion gear may be scratched, and the return
function may be damaged.
Signal plate Ss.
Starting plate OS
Fig. 5-6 Motor attachment
e PU Plate Attachment
Push the PU plate into place so that the PU
plate bearing section touches the revolution shaft
attachment nut. Installation direction is as shown
in figure 5-7. Note that there is a difference be-
tween auto-return and fully automatic models.
Arm base
scale mark
Fig. 5-7 PU plate attachment
e AS Knob Attachment
When installing the AS knob, put the AS knob
rib against the AS knob revolution control stopper
(attached to the arm base) and affix with the
screw. As the stopper may break, be sure to press
the AS knob down firmly when installing it.
Stopper
‘
Cae
Fig. 5-8 AS knob attachment
e Arm Base Attachment
When attaching the arm base section to the
mechanism section, put the mechanism section
switch locker and switch lever in the locked posi-
tion and verify that the tonearm is in the arm rest
location. Also be sure to put the manual elevation
lever in the up position and check that the PU
plate shaft is in the position shown in figure 5-9.
Switch lever — switch locker
Fig. 5-9 Arm base attachement
e Wiring the Connector
When attaching the wires to the 2P connector
from the microswitch, bend the lead wires from
the connector housing as shown in figure 5-10
before attaching.
Lead wires
|
Connector
housing
Fig. 5-10 Start lever unit attachment
6. ELECTRICAL PARTS LIST
NOTES:
e Parts without part number cannot be supplied.
e The /\ mark found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of identical
designation.
e For your Parts Stock Control, the fast moving items are indicated with the
marks k** and * .
*x%* GENERALLY MOVES FASTER THAN *
This classification shall be adjusted by each distributor because it depends on model
number, temperature, humidity, etc.
POWER SUPPLY ASSEMBLY (PWR-062)
Mark Part No. Symbol & Description
A\ PCL-040 C1 Capacitor
CEA 221M 25L C2
* PCX-010 D1
(WLO2)
A & PTT-123 Power transformer
(120V)
10

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