Panasonic rx ds 28 service manual

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ORDER NO M0980305302

Service Manual

Portable Stereo CD System

*MASH

martian misc maplnfi

COMPACT

DIGITAL AUDIO /fi

TAPE DECK : SG20 MECHANISM SERIES

Radio Cassette

RX-DSZB

CD SECTION : RAEO1522-M TRAVERSE DECK SERIES

I Specifications

I Radio
Frequency Range
FM 87.5 - 108 MHZ(50 kHZ steps)
AM 522 ~ 1629 kHz(9 kHz steps)
Intermediate Frequency
FM 10.7 MHZ
AM 459 kHZ
Sensitivity
FM 20 dB/50 mW
AM 48 dB/m/SO mW

I TAPE RECORDER
Track system

Recording System

Tape Speed

Erasing System

4 track, 2 channel, stereo
AC bias

4.8 cm/s

Magnet (Multi pole)

Colour
(K) Black Type
Area
Suffix for
Model No. Area Colour
(E) Europe
(EB) Great Britain (K)
(EG) Germany and ltaly
* MASH is a trademark of NTT.
I CD PLAYER
Sampling frequency 44.1 kHz
Decoding 16 - bit linear

Beam source Semiconductor laser (wavelength; 780 nm)
No. of channels 2 channel; stereo
Wow and flutter less than possible measured data
Digital filter 4fs

DIA converter MASH (1 bit DAC)

I General
Power requirement
AC 230-240V, 50 Hz
Power consumption: 48W
Battery 12 V (Eight RZOILRZO, D, UM~1 batteries)

0 Do not use rechargeable type batteries
Memory back-up for

Monitor System Variable sound monitor computer 6V (Four "AA size, UM-3,Ft6/LR6 batteries)
Frequency range (Normal position) 60 » 14000 Hz ' Do not use rechargeable type batteries
Speakers 10 cm 5.4 o x 2

Notes : Jacks
Specifications are subject to change without notice. Output Phones: 3.5 mm stereo (16 - 32 Q )
Weight and dimensions are approximate. Dimensions (W x H xD) 500 x 146 x 263 mm
Weight 4.0 kg without batteries

A WARNING

This service information is designed for experiense 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 protessional 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 Electronics (3) Pte. Ltd.
All rights reserved. Unauthorized copying and
distribution is a violation of law.

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RX-D828

I Contents

PAGE PAGE
HANDLING PRECAUTIONS FOR TRAVERSE DECK 2 PRINTED CIRCUIT BOARD ........................................ 25 ~ 29
ACCESSORIES .......................................... 2 TROUBLESHOOTING GUIDE 30
PRECAUTION OF LASER DIODE 3 MECHANISM PARTS LOCATION (RAA0919) 31
CAUTION FOR AC MAIN LEAD 4 MECHANISM PARTS L|ST............ 32
LOCATION OF CONTROLS 5 LOADING MECHANISM PART LIST 32
LISTENING TO CDs ............ 6 LOADING MECHANISM PARTS LOCATION. 33
OPERATION CHECKS ............................ 7 ~ 10 CABINET PARTS LOCATION 34
MEASUREMENTS AND ADJUSTMENTS 11 REPLACEMENT PARTS LIST 35 ~ 36
TERMINAL GUIDE OF IC's, TRANSISTORS AND DIODES 12 RESISTORS & CAPACITORS... 37 ~ 39
TERMINAL FUNCTION OF IC's .................................. 12 ~ 14 PACKING MATERIALS & ACCESSORIES . 40
WIRING CONNECTION DIAGRAM 15 PACKAGING ............................................ 40
SCHEMATIC DIAGRAM ................ 16 ~ 24

I Handling Precautions For Traverse Deck

The laser diode in the traverse deck (optical pickup) may break down due to potential

difference caused by static electricity of clothes or human body. \fiflab': 935
So. be carelul of electrostatic breakdown during repair of the traverse deck (optical ( ° "0 urn) .
pickup). Optical pickup

Lens (Do not touch)

- Handling oi traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity as it is ex-
tremely sensitive to electrical shock. Fig.2

2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted E a
into the flexible board (FPC board). 3 t . . ._
When removing or connecting the short pin, finish the job in as short time as |\
possible.

3. Take care not to apply excessive stress to the flexible board (FPO board).

4. Do not turn the variable resistor (laser power adjustment). It has already been
adjusted.

FPC
Handle it carefully)
Shading plrt

Be sure to shon this portion
(Use the shortan pin or clip)

- Grounding for electrostatic breakdown prevention

1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where the traverse
deck (optical pickup) is placed, and ground the sheet.

Caution :
The static electricity of your clothes will not be grounded through the wrist strap. Iron plate ermine metals
So, take care not to let your clothes touch the traverse deck (optical pickup). WM may

4 D Remote control transmitter 1 pc.
(For United Kinngm JA0733) (For others) (EUR545552)