Technics SLPS 50 Service Manual

Page 1

ORDER NO. AD900101208

Service Manual

MW DIGlT/IL

DIGITAL AUDIO

SL-P333 MECHANISM SERIES (SIWD113-32A)

ISPECIFICATIONS

I Audlo

No. ol channels 2 (lelt and right, stereo)
Frequency response 2720,000 Hzt0.5 dB
Output voltage 2 V (at 0 dB)
Dynamic range 96 dB
SIN ratio 103 dB

Total harmonic distortion
Harmonic distortion

0.003% (1 kHz. 0 dB)
0.002%(1 kHz, 0 dB)

Wow and flutter Below measurable limit
DA converter MASH (4 DAC)
Output impedance Approx. i kn
Load impedance More than 10 k0

Headphone output level 15 mW max. 320 (adjustable)

'MASH

oMASH (Multi- Stage Noise S_haping) is an effective over-
sampling D/A conversion technique which realizes a high
S/N ratio and needs no highly complex manufacturing
processes such as a laser trimming.

oMASH is a trademark of MT (Nippon Telegraph and
Telephone Corporation).

Technics

Compact Disc Player

SI.- PS5O

Color
Area
Country
Code Area Color
(E) Continental Europe. (K)

(EB) Great Britain, (K)

(EG) FR. Germany 8t Italy. (K)

(GC) Third Flegion. (K)

(GN) Oceania. (K)
I Pickup
Wavelength 780 nm
I General

Power supply
For Great Britain and Oceania: ACSOISOHZ, 240V
For Continental Europe and F.Fi. Germany & Italy: AC 50/60Hz, 220V
For others: AC 50/60 Hz. 110VII27V1220V/240V
Power consumption it W
Dlmensions(WxHXD) 430x126.5x332 5 mm
Weight 5.2 kg

SpeCIlications subject to change without nolice.
Weight and dimensions shown are approximate,

Matsushila Electric Industrial Co., Ltd.
Central PO. Box 288, Osaka 530-91, Japan

Page 2

L-PSSO

ICONTENTS

PLACEMENT ..
ACCESSORIES
PRECAUTION OF LASER DIODE
LOCATION OF CONTROLS .
CONNECTIONS ..................
HANDLING PRECAUTIONS FOR OPTICAL PICKUP .
INSTRUCTIONS FOR TRAVERSE OIL .
DISASSEMBLY INSTRUCTIONS .......
MEASUREMENTS AND ADJUSTMENTS
TERMINAL FUNCTION OF ICS .

l PLACEMENT

The optical pickup is secured to prevent damage during transport.
Be sure to release it before use.

(With inclination not to
damage the optical output

terminal) / 7 , Lock shaft Pull to unlock.
I (in the locked
' condition)

Note:

When carrying this unit. be
sure to remove the compact
disc from inside the unit, and
press the lock shaft to secure
the optical pickup.

(Make sure to place the unit
with the rear panel facing
downward.)

Soft cloth or similar material
(to prevent scratches)

BLOCK DIAGRAM .....
SCHEMATIC DIAGRAM
PRINTED CIRCUIT BOARDS
WIRING CONNECTION DIAGRAM
INlTERNAI. CONNECTION 0F FL ..
TROUBLESHOOTING GUIDE . . ~43

REPLACEMENT PARTS LIST . ~47
EXPLODIED VIEWS ........... . ~50
RESIS-TORS a CAFACITORS 51 52

PACKING

Notes of - lacement

I This unit is a precision instrument. Be sure to place it on a
flat surtace.
l Avoid places such as the tollowlng:
ONear any equipment or device that generates strong magnetism.
OOn any heat-generating equipment or device, or in any place
where the temperature is high (35°C or higher).
OExtremely cold places (5°C or below).
ONear a tuner or TV (it may cause noise in the broadcast, or
disturbance of the TV picture.)
I When carrying or storing the unltV handle it with care so it is
not subjected to any strong bumps.
Always remove the disc before storing the unit for any period of
time.
I To avoid problems due to vibration.
000 not place a book or similar object under this unit.
ODo not route the connection cables (of this or other units) across
the operation panel, across the top, or under the unit.

I ACCESSORIES
- AC power supply I Stereo connection
cord ..................... 1 cable .................... 1
SJA187: (E, EG) (SJP2249-3)

SJA193 ; (EB)
SJA173: (GN)
RJA0004: (GC)

- Remote control - Batteries ................. 2
transmitter ............... t (UM-ANE/QS)
(RAK-SLSOOQW)

Page 11

SL-PSSO

Rel. No. Rat. No.

15 16 Removal of the optical pickup

Removal ot the loading motot

Procedure - Procedure
1-»7-~11-> 0 187411»
12-45 12->14->16

Reler to the handling precautions tor
optical pickup and Instructions lor
traverse oil (See page 7).

1. Remove the 2 screws (0, 0).
2. Unsolder the 2 terminals and the 2
screws (9, 0).

Drive belt

Brush terminal

Loading motor

. Remove the drive belt.

. Remove the 2 screws (0. 0).

. Release the 2 claws.

. Unsolder the 2 terminals of the lead wire
of the loading motor.

Caution: Take care not to touch the brush
terminal.

ame-5

Rel. No.

17 Removal of the spindle motor

Procedure
1a648H9
a 11->17

1. Loosen the screw(0) by using a 1.27mm
allen wrench and remove the turntable.
2. Remove the 2 screws (0, 9).

Caution:

1. Turntable height adjustment is
necessary any time the turntable or
spindle motor is replaced.

2. The (+) terminal of the spindle motor is
indicated by the red mark.

V -Spindle motor

(+) Terminal

Adjustment of turntable height Fled mark

1. Insert a 0.9mm clearance gauge
(RZZO297) between the turntable and
loading base as shown right.

2. Tighten the turntable set-screw by using
a1.27mm allen wrench.

Turntable

Caution: 0.9mm clearance
Refer to turntable height adjustment (see 0'9" gauge (20297)
page 13). j

Spindle motor

_11,

Page 25

SL-PSS

I SCH EMATIC DIAGRAM (Parts list on pages 44, 4s, 51, 52.)

(This schematic diagram may be modified at any time with development of new technology.)

Notes:

0 S1

0 S2

' $101, 102

- $601

0 8602

I 5603

0 $604

0 $605

- 5606

0 $607

' $608

- 5609

0 8610

I 8611 .

' $612~814, :
e17, 319
~521, 624,
626, 627,
632, 633

0 5618

' 5625
0 S631
' $637
' $639

: Power switch In on position.

: Voltage selector switch. ([60] area only.)
: Disc holder Open/close detection switch.
: Tape side select (side A/B) switch.

: Search (va search) switch.

Program (program) switch.

: Tape length (tape length) switch.

Peak level search (peak search) switch.

: Display on/off (display onloff) switch.
: Recall (recall) switch.

: Search (44 search) switch.

: Just time (just time) switch.

: Time mode select (time made) switch.
' Clear (Clear) switch.

Numeric (0~IO) switches.
5612: 1, $613: 5, $614: 9, 8617: 0,
8619: 2, $620: 6, $621: 10, $624: >10,
3626: 3, $627: 7, $632: 4, $633: 8

Disc holder open/close (A open/close)
switch.

: Stop (I stop) switch.

: Pause (II pause) switch.

. Play (> play) switch.

: Auto cue (auto cue) switch.

0 The voltage value and waveforms are the reference voltage
of this unit measured by DC electronic voltmeter (high
Impedance) and oscilloscope on the basis of chassis.
Accordingly, there may arise some error in voltage values
and waveforms depending upon the internal impedance of
the tester or the measuring unit.

* The parenthesized are the values of voltage generated
during playlng (Test disc 1 kHz, L+ R, OdB), others are
voltage values in stop mode,

. Important safety notice:

Components identified by A mark have special

characteristics important for safety. When replacing any

of these components, use only manufacturers specified
parts.

0 - < > - 1.. < > --z Positive voltage lines and
negative voltage lines.

audio signal lines.

Caution!

IC and LSI are sensitive to static electricity,

Secondary trouble can be prevented by taking care during
repair.

0 Cover the parts boxes made of plastics with aluminum foil.

- Ground the soldering iron.
- Put a conductive mat on the work table.
0 Do not touch the pins of IC or LSI with fingers directly.

0 TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES

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