Panasonic rx ds 18 service manual

Page 1

ORDER NO. MDSBO306702

, Service Manual

Portable Stereo CD System

DIGITAL AUDIO

TAPE SECTION: SG20 MECHANISM SERIES

CD SECTION : RAEO152Z TRAVERSE DECK SERIES

I Specifications

I Radio
Frequency range

0
AM:

intermediate frequency

87.50 - 108.00 MHz (50 kHz steps)
522 - 1629 MHz (9 kHz steps)

FM: . 10.7 MHz
AM: 459 kHz

Sensitivity
FM: 7.1 uV/0.5mw output (Max.)
AM: 100 pV/ml0.5mW output (Max.)

I CD player

. Sampling frequency: 441 kHz
Decoding: 16 bit linear

Beam source: Semiconductor laser (wavelength 780 nm)
No. of channels: 2 channel, stereo
Wow and flutter:

Less than possible measurement data

D/A converter: MASH (1 bit DAC)

Specifications are subject to change without notice.
Weight and dimensions are approximate.

Radio Cassette

RX-DS1 8

Colour
(K) ...... Black Type
Areas
E -------- Europe. and Russia.
EB ------ Great Britain.
EG ------ Europe.

*- MASH is a trademark of NTl'.

I Tape recorder
Track system:
Monitor system:

4 track, 2 channel, stereo

Variable sound monitor
Recording system: AC bias (100 kHz)
Erasing system: Multi Pole magnet
Frequency range Normal position: 60 > 14,000 Hz

I General
Speakers: 10 cm 6 52 x 2
Jacks
Output: PHONES: 3.5 mm stereo (16 e 32 £2 )
Power requirement .
AC: 230 - 240 V, 50 HZ

Power consumption: 16 W
Battery: 12 V (Eight R20/LR20, D, UM-1 batteries)
0 Do not use rechargeable type batteries.
Memory back-up for computer:
6V (Four RSILRG, AA, UM-3 batteries)
0 Do not use rechargeable type batteries.
Dimensions (W x H X D): 500 x 146 X 263 mm
Weight: 3.4 kg without batteries

A WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public. it

does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to

. service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Panasonic®

©1998 Matsushita Electric industrial C0,, Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation of law.

Page 2

RX-DS18

I Contents

Page Page
Accessories --------------------------------------------------------------- 2 Type Illustration of Ics Transistors and Diodes ------------- 18
Precaution of Laser Diode ~~~~~~~~~~~~~~~~~~~~~~ 2, 3 Schematic Diagram ~~~~~~~~~~~~~~~ -~ 19 ~ 26
Handling Precautions for Traverse Deck ~~~-3 Printed Circuit Board Diagram ~ -~ 27 ~ 30
Caution for AC Main Lead - ~~~-4 Wiring Connection Diagram ~
Location of Controls ~ 5 Block Diagram ------------
Listening to CDs 6, 7 Terminal Function of ICs ~~ 38 ~ 41
Changing the Sound Quality- 6 Measurements and Adjustments - 2, 43
Before Recording ------------- 8 Troubleshooting Guide ~~~~~~~~~~~ ~
Recording from Radio Broadcast 9 Cabinet Parts Location ~~~~~
Recordan from CD ------------------- ~~~9 Loading Unit Parts Location
Self-Check Display ----------------------------------------------------- 1o Mechanism Parts Location -
Operation Checks and Replacement Parts list ~

Main Component Replacement Procedures 1 1 - 18 Packaging
I Accessorl es
0 AC power cord ----------------------------------------------------- 1 pc. 0 Remote control transmitter (EUR646550) ------------------- 1 pc.

(RJA0019-2K) [E. EG areas]

(VJAO733) [EB area]

CAUTION:

THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

l Precaution of Laser Diode

This product utilizes a laser diode with the unit turned on, invisible laser radiation is emitted from the pick up lens.

CAUTION:

ACHTUNG:

Wave length: 780 nm
Maximum output radiation power from pick up: 100 uWNDE

Laser radiation from the pick up unit is safety level, but be sure the followings:

1. Do not disassemble the pick up unit, since radiation from exposed laser diode is dangerous.
2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.

8. Do not look at the focus lens using optical instruments.
4. Recommend not to lock at pick up lens for a long time.

Dieses produkt enihélt eine laserdiode. Im eingeschalteten zustand wird unsichtbare laserstrahlung von der lasereinheit

adgestrahit.
Wellenlénge: 780 nm
Maximale strahlungsleistung der Iaserlnhelt". 100 uWNDE

Die strahlung an der lasereinhelt ist ungefahnlch, wenn folgende punkte beachtet werden:

1. Die Iaserelnhelt nlcht zerlegen, da die strahlung an der frelgelegten laserdiode gefahrilch let.
2. Den werksseitig justierten einstellregler der laserelnreit nlcht verstellen.

3. Nicht mit optischen instrumenten in die fokussierlinse blicken.
4. Nicht fiber Iangere zeit in die iokusslerlinse blicken.