Technics SLPG 420 A Service Manual

Page 1

ORDER NO. M3920302062

ervice Manual

. comma Compact Disc Player
Alfie, SL-PG420A
Colour

mulli-slsqe noise shaping

(K) Black Type

Area

3:23:10; Area Colour
(E) Continental Europe.
(EB) Great Britain. (K)
(EG) FR. Germany & Italy.

mom PCB)
REP Issue-rt

7 we)

SPECIFICATIONS _. 96:5 WeSZG-P
~25

I Audio I Genera 'L'X i 13C 3 I OCH 036.163
Nb. of channels 2 (left and right, stereo) Power Suvplyfifi AC 50/60 Hz 230 V-24O V

. Frequency response 2-20,!300 Hz, :05 :15 Power consumption 10 W
Output voltage . 2 V (at 0 dB) Dimensions (WXHXD) 430x103x283 mm
Dynamic range 96 dB Weight 3.6 kg
SIN ratio 100 dB
Harmonic distortion 0.003% (1 kHz, 0 (38) Note:
Total harmonic distortion 000594: (1 kHZI 0 63) Specifications are subject to change without notice.
Wow and flutter Below measurable limit Weight and dimensions are approximate.
DA converter MASH (4 BAD)
Output impedance Approx. 6000
Load impedance More than 10 kfl . T . . , .
Headphone amp! level 15 mw max 320 (adjustable) eohnlcs (or Panasonic) developed the world s first MASH

type DAC and ADC. MASH technology was invented by
l Pickup NTI (LSI Labs).
. Wavelength 730 "m 0 X MASH is a trademark of Nl'l'.
CO NTENTS-
- Page
PLACEMENT ............ SCHEMATIC DIAGRAM .................................................. 19~24
. CLEANING OF LENS. TERMINAL GUIDE 0F IC'S,

ACCESSORIES. TRANSISTORS AND DIODES ........................................ 24
PRECAUTION O PRINTED CIRCUIT BOARDS ......... . 25~28
LOCATION OF CONTROLS . WIRING CONNECTION DIAGRAM . 29
CONNECTIONS ................. REPLACEMENT PARTS LIST.

EXPLODED VIEWS
RESISTORS & CAP
PACKING
TROUBLESHOOTING GUIDE ......................................... 38~40

DISASSEMBLY INSTRUCTIONS.
CHECKING OF THE SERVO P.C.
MEASUREMENTS AND ADJUSTMENTS
TERMINAL FUNCTION OF ICS.
BLOCK DIAGRAM...
INTERNAL CONNEC

* TECHNICAL INFORMATION
a: This technical information Is located on pp 49~56 oi the SL- PJ46A
Service Manual (Order No. AD8902036CZ)
. Therefore. refer to that Service Manual.

TeChnics

Page 2

SL-PG420A

I PLACEMENT

Before placement

Two transport security devices are secured to prevent the optical
pickup from damage during transport.
Be sure to release them before use.

Notes of placement

I This unit is a precision instrument. Be sure to place it on a
flat surface.
I Avoid places such as the following:

nNear any equipment or device that generates strong magnetism

LOCKED Tum® RELEASED OOn any heat-generating equipment or device, or in any place
/_\ o where the temperature is high (35°C or higher).
a I tExtremely cold places (5°C or below).
:> --- d> _ - » INear a tuner or TV (It may cause noise in the broadcast, or
v Pull I o disturbance of the TV picture.)

® out I When carrying or storing the unit, handle it with care so
that it is not subjected to any strong bumps.

Always remove the compact 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.

0Do not route the connection cables (of this or other units) across
the operation panel, across the top, or under the unit.

insert them here after removing.
Turn clockwise by 90" to secure
them.

Soft cloth or similar material (to
prevent scratches)

J - ..

Note:

When transporting the unit, be sure tozrernove the compact disc
from inside the unit. And replace the transport security devices
again following the reverse order not todamage the optical pickup.

ICLEANING OF LENS

If the lens is stained causing sound skip or operation Cautions:

failure, open the top cover by pressing the open 0 Do not directly apply the cleaner solution to the

button, and clean the lens. lens. Do not apply too much solution to the cotton
rod or otherwise the solution will flow into the player.

. Wipe the lens carefully. Do not give too much stress
to the lens or otherwise it may scratch the lens or
cause optical pickup trouble.

- If the solution should be too much applied, wipe the
lens with a dry cotton rod.

0 To remove dust or dirt

Blow the lens with the blower provided in the cleaning
kit to remove dust or dirt.

Lens cleaning kit (Part No. : SZZP1038C)

Dust or dirt .. Fingerprint

' To remove fingerprint

If the blower is not enough, moisten the cotton rod
with the lens cleaner solution and wipe the lens with
it from center of the lens to outside.

I ACCESSORIES

' AC power supply cord... 1 pc. IStereo connection cable. 1 pc. 0 Remote control transmitter
[HJAOOie-K (E, EG)]
SJA193 (EB)

- Batteries .
Use two UM-4,
""AAA (R03) size
(1.5V) batteries.

(SJP2249-3) (EUR64798) ................. 1 pc.

' Note: Configuration of Ac power supply cord differs according to area.

_2_