Pioneer PL-Z94 User manual

@) PIONEER’
The Art of Entertainment
Service
CAL ETTIED|
STEREO TURNTABLE
PL-294 ...
PL-Z2570 ZEBM
PL-Z2470 ZEBM
¢ Refer to the service manual ARP1478, PL-Z91/ZEBM type.
©@ This manual is applicable to the PL-Z94/ZEBM, PL-Z570/ZEBM and PL-Z470/ZEBM types.
@ These products are components of systems. As to the system composition, refer to the applicable system
manuals.
PIONEER ELECTRONIC CORPORATION 4-1, Meguro t-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 505 Cochrane Drive, Markham, Ontario L3R 8E3 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Keetbergiaan 1, 2740 Beveren, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1990

'PL-Z94, PL-2570, PL-Z470
NOTES:
¢ Parts without part number cannot be supplied.
e Parts marked by “@®” are not always kept in stock. Their delivery time may be longer than usual or they may
be unavailable.
© The A\ 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.
The PL-Z94/ZEBM, PL-Z570/ZEBM and PL-Z470/ZEBM types are the same as the PL-Z91/ZEBM type
with the exception of the following sections.
io Part No.
Maik ~ Symbol: & Description PL-Z91/ZEBM PL-Z94/ZEBM PL-Z570/ZEBM | PL-z47o/zepm | Remarks
Sub-panel assembly Non supply Non supply Non supply Non supply
Name plate Non supply Non supply
Speed button PAC1226 PAC1226 PAC1436 PAC1436
EV button PAC1227 PAC1227 PAC1437 PAC1437
S/S button PAC1228 PAC1423
Cut botton PAC1469
Front name plate Non supply Non supply
Front name plate assembly PEA1138 PEA1137
Insulator PEB1155 PEB1155
Insulator assembly PXA1370 PXA1370
Arm assembly PPD1027 PPD1027 PPD1027
Cut rod Non supply Non supply
Size rod Non supply Non supply
S/S rod Non supply Non supply
Protector(R) PHA1045 PHA1045 PHA1082 PHA1082
Protector(L) PHA1046 PHA1046 PHA1083 PHA1083
Turn table PNR1025 PNR1037 PNR1037 PNR1037
Button stopper F PBK1038 PBK1038
Button stopper R PBK1037 PBK1037
Packing case PHG1163 PHG1599 PHG1604 PHG1603
Panel PNW1294 PNW1292 PNW1493 PNW1734
Start lever Non supply Non supply
PU plate assembly PXA1109 PXA1109
PU plate(B) assembly PXA1114 PXA1114
Note: The PU plate(B) assembly (PXA1114) is the same as that of PL-Z81/ZEBM which is shown with PL-Z91/ZEBM in the
service manual ARP1478.
The Sub-panel assembly of PL-Z570/ZEBM type is the same as that of PL-Z91/ZEBM type.
The Sub-panel assmeblies of PL-294/ZEBM and PL-Z470/ZEBM types are the same as the sub-panel
assembly of PL-Z91/ZEBM with the exception of the following sections.
Part No.
Mark ipti
* opimbel® Dercnpties PL-Z91/ZEBM PL-294/ZEBM PL-2470/ZEBM
Select lever spring PBH1053
Reset plate spring PBH1054
Select lever PBH1096
Index cam PNW1296
Reset plate PNW1312
Selector PNW1313
Drive plate assembly PXA1110 PXA1112 PXA1112
Note: The Drive plate assembly (PXA1112) is the same as that of PL-Z81/ZEBM which is shown with PL-Z91/ZEBM in the
service manual ARP1478.

PIONGCER
The future of sound and vision.
hd Wer
ORDER NO.
ARP1478
STEREO TURNTABLE
L291 zea
L=Z2831 cco
©
This
service
manual
is
applicable
to
the
PL-Z291/ZEBM
and
PL-Z81/ZEBM
types.
CONTENTS
1,
SPECIFICATIONS
1.0.00...
00
cece
eee
eens
2
7.
P.C.
BOARDS
CONNECTION
DIAGRAM
....
13
2.
PANEL
FACILITIES
.........000ceeeeeee
Z
8.
ELECTRICAL
PARTS
LIST..........-05-
14
SIPRORING
4c
eta
doe
meee
Se
ada
an
eas
ks
3
9.
PRECAUTIONS
FOR
REASSEMBLY
.......
15
DISASSEMBLY
eit
do
hd
seine
dt
eneee
as
4:
40;
ADIUSTMENTS:
.uiceccusdons
i
dawed
ease
19
5,
EXPLODED
VIEWS..........
000000
ee
eee
6
REGOAGE®
ox
cckimow
saute
tyme
arin:
21
6.
SCHEMATIC
DIAGRAM
..............0--
12
PMISTE
co
ay
cud
adara
tena
Rees
Pee
23
PIONEER
ELECTRONIC
CORPORATION
=
4-1,
Meguro
1-Chome,
Meguro-ku,
Tokyo
153,
Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER
ELECTRONICS
OF
CANADA,
INC.
505
Cochrane
Drive,
Markham,
Ontario
LR
8E3
Canada
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgium
PIONEER
ELECTRONICS
AUSTRALIA
PTY.
LTD.
178-184
Boundary
Road,
Braeside,
Victoria
3195,
Australia
TEL:
[03]
580-9911
MO
©
JAN.
1988
Printed
in
Japan

od eS Md ee — |
1. SPECIFICATION
Turntable: PL-Z91/PL-Z81 Other
Motor,
Platter
Dimensions
---1+----e
360W
x
90H
x
350.5Dimm)
Motor Typer screener cence trees DC servo motor Weight
Drive Method ---:--:--::c tees trt etter eteteeteey belt drive PL-Z91
Ete) >1 >): ee 33-1/3, 45 RPM PL-Z81
Speed Variation ------------ 0.07% WRMS (JIS +0.10% WTD)
Peak (DIN) Accessories
SIN Ratio s--1-:-ereerreet erect eee tee eee tere es 68 dB (DIN-B) EP Adaptor <-1-ceecceccesceceeeeeeneeeeecenneenee serene neneerneteneerenes 1
edt: 4 (-) ee 295mm dia., aluminum die-cast
Specifications and design subject to possible modifications
Tonearm without notice due to improvement.
A]: : Dynamic-balance type, straight tonearm
Installed Cartridge
Type o's. Chiara gp bin i wiblel ciate alee 22's nine ba-elele See Tin OURS SSIES Sle'b Bis'd Sietto'd be So OF Sawa CTS MM type
Replacement Stylus bbe RN AW RDS HSE ae hn tee aoe ba CUTE Woe SHEERS © PN— 210
Stylus Pubid.onie, $09 NONE. vie Siete a nieiete bee Se STS Sel Bee BUEG Hassel Pere 0.6 mil diamond
Output voltage 2.5mV (1kHz, 3.54cm/s, Lat. peak)
Tracking Force ---:--+-:--0::rerreeer rere eeeees 2-—3.0g {optimum 2.5g)
Frequency Response -++:-0+----se- ee reeerr terres 20Hz to 20,000Hz
Load Resistance ee ee ECCT TELE Ce PT Te EE TOE LE TEE ee A7kQ
Cartridge Weight ECON TT TT ETEN SES CCE EET EEC TE PUTT TST ETT PTET eee 4g
2. PANEL FACILITIES
(PL-Z81 is not equipped | |
with
this
switch.)
64)
6) 63
49)

PL-Z91, PL-Z81
@2 EP adaptor 62) PLAY/STOP switch (only PL-Z91)
Platter
shaft
Press
this
switch
when
starting
auto
play
or
when
stopping
play.
Platter mat mares
Platter
Be
sure
to
press
the
switch
firmly
when
starting
playback;
if
not
pressed firmly, the platter may rotate without the tonearm mov-
Dust cover ing.
@ Arm rest 63) CUT switch (only PL-Z81)
4) Tonearm Press this switch when stopping play.
Cartridge 64 ARM ELEVATION switch
Use the switch for manual play.
SPEED
switch
¢
Use
the
switch
to
suspend
record
play
temporarily.
¢ Use the switch when changing the tracks during actual
Set this switch in accordance with the speed of the record.
33:
For
33-1/3
45:
play.
(PROS
FSERI
ES
Soe
PRs
erty
Teeeress
{UP]:
The
tonearm
rises
(the
stylus
moves
away
from
the
i
=
record).
@
CISG
SIZE
switch
{only
PL-291)
[DOWN]:
The
tonearm
descends
(the
stylus
is
lowered
onto
Set
this
switch
in
accordance
with
the
size
of
the
record.
the
record).
30: For 30 cm LP records. 17: For 17 cm EP records.
3. PACKING
Parts List of Packing (PL-Z91 and PL-Z81)
Mark No. Part No. Description
1, PEB1059 Turntable sheet
2. PRH1007 Operating instructions
3. PNV1008 Dust cover
4. PHA1045 Protector (R)
5. PHA1046 Protector (L)
6. PEC1002 45 adaptor
7. PHG1163 Packing case (For PL-Z91)
PHG1158 Packing case (For PL-Z81)
8. PNR1020 Turntable
51. Mirror mat
52, Vinyl bag

eo) aS be Fe rd —
4. DISASSEMBLY
PU lead wires
Solder iron
Dust cover
Tonearm assembly
Turntable sheet assembly
Turntable platter
@
SW P.C. board assembly
Mechanism assembly
(Sub-panel assembly}
Under base

Mechanism Assembly (Sub-panel Assembly)
and Motor
. Rotate the turntable platter to disengage the me-
chanism.
). Fix the tonearm to the arm rest. (Be sure to
cover the stylus with the stylus cover.)
. Remove the turntable sheet assembly and then
the turntable platter.
. Close the dust cover, turn the turntable upside
down, and place it on a soft surface, e.g., a work
bench covered with soft cloth (for product
protection).
. Remove the five screws labeled (D, and remove
the under base.
. Remove the five screws labeled @) and one
screw labeled (@), and remove the lead con-
nected to the microswitch. This operation will
release the mechanism assembly.
. Remove the two screws labeled @) to remove
the motor assembly.
PL-Z91,PL-Z81
.Remove the mechanism assembly from the
Tonearm assembly
panel.
.Unsolder
and
disconnect
the
PU
leads
(arm
leads)
from
the
PU
printed
circuit
board.
.
Remove
the
AS
spring
from
the
PU
plate
as-
sembly.
.
Remove
the
screw
labeled
(),
and
remove
the
PU
plate
assembly
from
the
tonearm
assembly.
. Remove the R clip.
.
Place
the
turntable
on
one
of
its
sides,
remove
the
arm
clamp,
and
gently
pull
out
the
tonearm
assembly
from
the
panel.

PL-Z91, PL-Z81
5. EXPLODED VIEW
5.1 EXTERIOR
NOTES:
e Parts without part number cannot be supplied.
e The A
placing, be sure to use parts of identical designation.
e For your Parts Stock Control, the fast moving items are indicated with the marks ®**® and *.
** GENERALLY MOVES FASTER THAN *
This classification shall be adjusted by each distributor because it depends on model number, temperature, humidity, ete.
e Parts marked by ““@” are not always kept in stock. Their delivery time may be longer than usual or they may be un-
available.
Parts List of Exterior
Mark No. Part No. Description
1. PXA1106 PU cord assembly
2. CKDYF103Z50 Ceramic capasistor
* 3, PPD1016 Arm assembly
4. PEB1059 Turntable sheet
wk 5. PEB1060 Belt
6. PNR1020 Turntable
7. PBA-112 Screw
8. PEB1063 Rubber
9. PBK1033 R clip
* 10, PNW1289 Arm rest
11, PBF-020 Washer
12, PBH1044 AS spring
13, PBH1046 EV spring
14, PNW1290 EV sheet
15. IPC30P100FMC Screw
16. PBH1050 EV lever spring
17, PBH1051 Elevation cam spring
18. PED-051 Washer
19. PNW1309 Elevation cam
20. PXT1017 EV plate spring (D) unit
21. WT31D054D050 Washer
22. PXA1109 PU plate assembly
(PL-Z91 only)
23, PXA1114 PU plate (B) assembly
(PL-Z81 only)
24. PMD40PO080FMC Screw (PL-Z81 only)
25. WC40FMC Washer
26. YS40FBT Washer
27. IPC30P100FMC Screw
28. IPC30P290FMC Screw
29. PBK1038 Button stopper F
(PL-Z91 only)
30. PBK1037 Button stopper R
(PL-Z81 only)
31. PSZ30PO60FMC Screw
32. PNV1008 Dust cover
33. PXA1108 Hinge assembly
35. PEB1061 Insulator
36. YP40FBK Nut
Mark
37.
38.
39.
40.
41.
42.
43.
44,
45.
46.
101.
102.
103.
104.
105.
106.
107,
108.
109.
110.
111,
112.
113.
114.
115.
No.
mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when re-
Part No. Description
BPZ26P120FZK Screw
PAM1156 Front name plate (For PL-Z91)
PAM1155 Front name plate (For PL-Z81)
PNW1294 Panel (For PL-Z91)
PNW1292 Panel (For PL-Z81)
PAC1226 Speed button
PAC1227 EV button
PAC1228 S/S button
PEC1002 45 adaptor
PYY 1047 Motor assembly
PNW1319 Stylus cover
PXV1004 Cartridge
SW P.C. board assembly
Sub-panel assembly
PU plate spring
Screw (PL-Z91 only)
PU plate (A)
PU plate (B)
PU spring washer
EV rod
Size rod (PL-Z91 only)
S/S rod (PL-Z91 only)
Cut rod (PL-Z81 only)
S/S spring
Rubber
Under base
Start lever

yo,
,
.
——
|
z
|
i
A
-
:
-
7
-

5.2 SUB-PANEL ASSEMBLY (PL-2Z91)
Parts
List
of
Sub-panel
(PL-Z91
and
PL-Z81)
A ke
14.
15,
16.
17.
18.
PBH1040
PBH1053
PBH1054
PNB1096
PNB1098
PNW1296
PNW1301
PNW1312
PNW1313
PNW1314
PSF-023
PSZ30PO60FMC
PXA1110
PXA1112
PBH-224
PBK-038
PSZ30P100FMC
PXA1111
PYY1046
Description Mark No. Part No
Lock spring 101.
Sélect levér spring 102,
(PL-Z91 only) 103.
Reset plate spring 104,
(PL-Z91 only) 105.
Select lever (PL-Z91 only) 106.
Detector lever 107.
Index cam (PL-Z91 only) 108.
Switch locker 109,
Reset plate (PL-Z91 only) 110.
Selector (PL-Z91 only)
Switéh lever
Microswitch (POWER, $1)
Screw
Drive plate assembly
(For PL-Z91)
Drive plate assembly
(For PL-Z81)
Start plate spring
Click plate spring
Serew
Shaft assembly
Cam assembly
Description
Starting plate
Signal plate
Sub-panel
Start lever (PL-Z91 only)
EV cam
Lead-in ratch
Drive plate unit
Start plate

PL-Z81
5.3 SUB-PANEL ASSEMBLY (PL-Z81)

| PL-Z91,PL-Z81
6. SCHEMATIC DIAGRAM
$1 A S1: POWER
PSF -023
SW P.C. BOARD ASSEMBLY
| VR1: SPEED ADJ. 45rpm |
VRTB6VS472
VR2: SPEED ADJ. 33-1/3rpm_ ss}
VRTB6VS472
VR1 VR2
4.7K
,
| Ee
PU CORD ASSEMBLY
PXA1106
DC 11.3V
MOTOR ASSEMBLY
PYY 1047
1. RESISTORS:
Indicated
in
2,
1/8W
&
1/4W,
£5%
tolerance
unless
otherwise
SWITCHES:
noted k; kQ, M; MQ, (F); £1%, (G); +2%, (K); +10%, (M); S1: POWER ON-OFF
+20% tolerance $2: SPEED 33-1/3 rpm — 45 rpm
2. CAPACITORS: The underlined indicates the switch position,
Indicated in capacity (uF)/voltage (V) unless otherwise noted
p; pF. Indication without voltage is 50V except electrolytic
capacitor.
3. VOLTAGE, CURRENT:
1]; DC voltage (V) at no input signal
Value in ( ) is DC voltage at rated power.
mA; DC current at no input signal
4. OTHERS:
m@® ; Signal route.
@ ; Adjusting point.
The A 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.
* marked capacitors and resistors have parts numbers,
This is the basic schematic diagram, but the actual circuit may
vary due to improvements in design.

“PL-Z91,
PL-Z81
7. P.C. BOARDS CONNECTION DIAGRAM
| WHITE
BLUE = —===={_ > ROUT
ue = {08> f0uT,
PU CORD ASSEMBLY
PXA1106
SW P.C. BOARD ASSEMBLY
Wade S1: POWER
SS oo ol
4
WHITE
BLACK
ie ToS
2 2
3 3
(4 (ets
MOTOR ASSEMBLY
PYY 1047

PL-Z91, PL-Z81
8. ELECTRICAL PARTS LIST
NOTES:
Parts without part number cannot be supplied.
Parts marked by “®” are not always kept in stock. Their delivery time may be longer than usual or they may be unavail-
able.
© The A\ 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.
¢ For your parts Stock Control, the fast moving items are indicated with the marks * * and *.
* * GENERALLY MOVES FASTER THAN *
This classification shall be adjusted by each distributor because it depends on model number, temperature, humidity, etc.
© When ordering resistors, first convert resistance values into code form as shown in the following examples.
Ex. 1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J =
5%, and K = 10%). :
5602 56 X 10! DOL wetie hina: RDI4APSB OOS
47kQ 47 X 107 BIB oe ccduasuer teil Sette RDI4PS@OOS
0.52 ORD ss esesaast beet erence RN2HO BOK
12 OND siren eseses ib yeices tegen ath ached RSIPOUO kK
Ex. 2 When there are 3 effective digits (such as in high precision metal film resistors).
S.62KQ S62 X10! —— SO DD caeeecccscscscscsesesees RNIASRO BO F
Miscellaneous Parts SW P.C. Board Assembly
Mark Symbol & Description Part No. SWITCH
SW P.C, board assembly _ Mark Symbol & Description Part No.
PU cord assembly PXA1106 Se a ke ed
kk Motor assembly PYY1047 xk $2 Slide switch (SPEED) PSH1006
PU Cord Assembly (PXA1106) RESISTORS
CAPACITOR Mark Symbol & Description Part No.
Mark Symbol & Description Part No. * VR1,VR2_ Semi-Fixed resistor VRTB6VS472
C1 Ceramic capacitor CKDYF103Z50

=) k= Ne =) ek =
9. PRECAUTIONS FOR REASSEMBLY
If new parts have been used, follow these direc-
tions and precautions when reassembling a unit
after completing repairs. Also lubricate places
requiring lubrication. Incorrect mounting of parts
or neglecting lubrication may cause problems with
the mechanical section. Follow the procedures
properly.
9.1 PLACES THAT REQUIRE LUBRICATION
NOTE:
Types of lubricants and places where they are used are
listed in table 1.
Places used
EV cam section
all other places requiring lubrication
Lubrication points are specified for greases other
than GYA-008. Never use a different type of
greases.
e EV Cam Section
Apply grease 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)
Top and side
(Sliding section of
auto-stop mechanism)
EV cam side surface
{Sliding section of elevation cam)
Fig. 9-1 Driving plate assembly section
@ Switch Locker Section
Apply grease to the switch locker (hole) and
sub-panel base sliding section to decrease the
burden on the mechanism.
When applying grease to the hole (shaft hole),
do not apply any grease 2—3mm from the button
surface. If grease 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
wer
Fig. 9-2 Switch locker section
e EV Sheet Section
Apply
grease
to
the
elevation
shaft
and
sliding
section
of
the
bearing.
This
is
to
assure
stability
in
the
elevation
lower-
ing
speed.
Raising shaft __V
EV sheet assembly
Fig. 9-3 EV sheet section
e Elevation Cam Section
Apply GYA-008 grease to the elevation cam and
sliding section of the raising shaft to decrease the
burden when operated.
Also apply silicon oil #500000 to the hole. This
is to stabilize the elevation lowering speed.
Elevation cam
Fig. 9-4 Elevation cam section

© Index Cam Section (PL-Z91 only)
Apply grease to the index cam lower surface of
the hooked section to decrease the burden on the
mechanism.
N
\ZZ
SSS
oN
ASN SNS
Fig. 9-5 Index cam section
e Other Places to be Greased (PL-Z91 only)
e Reset Plate Section (PL-Z91 only)
Apply grease to the sub-panel base (shaft) and
sliding section of the reset plate to decrease the
burden on the mechanism.
5 Reset plate
Sub-panel base
Apply grease (GYA-008)
to shaft section
Fig. 9-6 Reset plate section
Enlarged view of parts A and B in Fig. 9-7
Fig. 9-7

PL-Z91,
PL-Z81
Detail of A and B in Fig. 9-8
e Other Places to be Greased (PL-Z81 only)
Fig. 9-8
9.2 PRECAUTIONS FOR ATTACHMENT e PU Plate Assembly Attachment
OF
PARTS
AND
REASSEMBLY
The
PU
plate
assembly
is
attached
with
screw
e Cam Assembly Attachment by pushing the PU plate bearing section against
The cam assembly is attached by letting the lock the arm rotating shaft fixing nut.
spring
go
in
the
direction
@)
as
shown
in
Fig.
9-9.
The
attachment
direction
is
matched
to
the
center of the support line as shown in Fig. 9-10.
(position the tonearm above the arm rest).
Panel mark
{aligned center)
PU plate
assembly
Fig.
9-9
Cam
assembly
attachment
Fig.
9-10
PU
plate
attachment

od ee a |
® Arm Base Attachment
When mounting the subpanel assembly to the unit
(panel), set the position of the switch locker in the
subpanel assembly and the switch lever so that the
microswitch (S1: for power on/off) is in the OFF
position. Also set the tonearm above the arm rest.
Set the arm elevator to UP. Then when the
subpanel is mounted, mount the PU plate shaft in
the position shown in Fig. 9-11.
‘ PU lead
a
ie ge HT wire
CEG
PU p.c board | = |
Fig. 9-11 Arm base attachment
3. MICROSWITCH LEAD WIRE STYLING
CONFIRMATION (PL-Z91 only)
When attaching the mechanism assembly to the
panel, be careful that the lead wires do not contact
the select lever as shown in Fig. 9-12. If the lead
wires contact the select lever, record size detection
will malfunction.
Mechanism wl
Microswitch lead wire Solace lever-unit
Fig. 9-12 Microswitch lead wire attachment
e Start Lever Unit Attachment (PL-Z91 only)
Attach the shaft section of the start lever unit
as shown in Fig. 9-13 so that it comes between the
reset plate and start plate.
Driving plate
assembly
Fig. 9-13 Start lever unit attachment
e Spindle Assembly Attachment (PL-Z91 only)
When installing the spindle assembly, 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 spindle assem-
bly is attached with the starting plate section (B)
protruding, the starting plate may be deformed,
the spindle assembly pinion gear may be scratched,
and the return function may be come disabled.
Signal plate
Fig. 9-14 Spindle assembly attachment
@ Installing the Cords (PL-Z91 only)
For the styling of the PU cord assembly and
other lead wiring, refer to Fig. 9-15.
‘—PU cord assembly
Fig. 9-15 Cords stringing

10. ADJUSTMENTS
10.1 MOTOR ADJUSTMENTS
Place the record player on blocks as shown in
Fig. 10-1 and adjust the motor from the under
base.
1.
2.
Turn the arm elevation lever up to raise the arm.
Place a strobo sheet on the turntable, move the
arm to the turntable side, and rotate the turn-
table.
. Adjust semifixed resistors VR1 and VR2 of the
motor assembly so the 33-1/3 rpm and 45 rpm
strobo of the strobo sheet appears to the static.
. First adjust VR1 for 45 rpm and then the adjust
VR2 for 33-1/3 rpm.
10.2 STYLUS LANDING POSITION
ADJUSTMENT (PL-Z91 only)
When the tonearm doesn’t land in the correct
position during automatic playback, adjust accord-
ing to the following procedure.
1.
2.
Place a 30cm record on the platter.
Press the START/STOP switch and start auto-
matic playback. Note the landing position of the
stylus. (How many mm to the inside or outside
compared to the proper landing position on the
platter.)
. Depress the START/STOP switch to return the
tonearm to the tonearm rest.
. Press the arm elevation switch to raise the stylus.
. With the adjustment hole visible, move the tone-
arm to the edge of the record by hand.
. Turn the adjustment screw with a small screw-
driver according to step 2 as follows:
@ When the stylus lands at the outside of the
record, turn the adjustment screw clockwise.
@ When the stylus lands on the proper position
toward the record center, turn the adjustment
screw counterclockwise. One half turn of the
adjustment screws moves the tonearm about
12mm.
. After adjustment, press the START/STOP
switch and check if the stylus landing point was
correctly adjusted.
If adjustment is incorrect, repeat steps 3 to 6.
Be careful not to damage the record and stylus
when making this adjustment.
=)
=)
=
ADJUSTMENT USING A TEST RECORD
(Landing position adjustment cannot be done
when the tonearm is on the record.)
30cm
landing
point
.....
Lands
between
count
306
and
313.
17cm
landing
point
.....
Lands
between
count
175
and
183.
33-1/3 rpm
Fig. 10-1 Motor adjustment
Small
Phillips screwdriver —_¢
Tonearm lands
Tonearm
lands
toward
L
Howard
outside
of
inside of record record
Crefr cre tr
Zee © |
—
. Ss
Adjustment hole
Fig. 10-2 Stylus landing point adjustment

, PL-Z91,PL-281
10.3 AUTO-RETURN POSITION ADJUSTMENT
When the auto-return position is too near or too
far, make the following adjustments.
1.
ae
Check the stylus landing position. If the stylus
does not land at the correct position, adjust the
landing position.
. Set the arm elevation switch to UP and turn the
auto-return adjustment screw fully counter-
clockwise.
. Move the tonearm as far as it will go toward the
center.
.When the auto-return adjustment screws is
turned slowly clockwise, the tonearm will begin
to move toward the center.
. Stop turning the adjustment screw at the point
at which there is a space of 32mm between the
stylus of the cartridge and the center shaft. (Fig.
10-3)
After adjustment, check that auto-return is per-
formed correctly and that the stylus landing
position is correct.
10.4 ARM ELEVATION HEIGHT
1.
2.
ADJUSTMENT
Press the arm elevation switch to move the arm
up.
Turn the height adjustment screw on the side of
the arm elevation unit with a Phillips screwdriver
so that the distance between the record and the
stylus is 742mm. The arm moves up when the
screw is turned counterclockwise.
Phillips screwdriver —e
Gi?
Fig. 10-4 Arm elevation adjustment