Philips MCM-2050 Service Manual

Micro music system

MCM2050/05/12

CONTENTS

Version Variation.............................................................................2-1

Block diagram................................................................................3-1

Wiring diagram ..............................................................................3-2

LCD + DC + MP3 + KEY board

Circuit diagram ..........................................................................4-1

Layout diagram..................................................................4-2 4-3

MAIN board

Circuit diagram .........................................................................5-1

Layout diagram..................................................................5-2..5-3

5-1..1-1............................................................noitacificepslacinhceT

Exploded view diagram .................................................................6-1

©

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Published by LZ1129 Service Audio Subject to modification

Version 1.0

3142 785 36560

TECHNICAL SPECIFICATION

6

GENERAL DESCRIPTION

Micro Hi-Fi System with PLL Tuner , CD-MP3, USB 10W * 2

MP3 LINK , Remote Control

X

7

LIFETIME : 7 Years

Class Tuner Supply + Amplifier Loudspeaker Boxes Clock MP3 LINKCDUSB

XX

IX

X

III

II X X

8 10

SAFETY requirements

Version Safety EMC

Page 9 4,5 4

/12/05/

79

EN55013IEC60065

RADIATION / IMMUNITY requirments ( EMC )

ALL climates : + 5 Dregree till + 35 Degree

MODERATE climates : + N.A till N.A Degree

CLIMATIC requirements

PERFORMANCE CLASSES

POWER SUPPLY MAINS ( A.C. )

100/240 Vac(AC/DC Adaptor) Version /12/05/79

Voltage Selection NO

Frequency 60/50Hz

POWER CONSUMER

MCM2050/12/05/79

( DEMO mode " OFF " ) , NOM. A, INPUT

Stadby :

@ 1/8 Prated , NOM. A, INPUT

Maximum : /

Q and R according to Product Division Rules

Quality : 0.4 % ( Major ) 1.5 % ( Mirror )

Reliability : 2.0 % ( C 42 )

ECO Power mode : /

Tested according to General Test Instruction refer to PHILIPS standary ( UAN -D1591 )

Measured according to PHILIPS standary ( UAN - L1059 ) unless other wise stated

All not mentioned date, please refer to PHILIPS standary ( XUW - 0010 - jun 2001)

1-1

1-2

: :

:

TECHNIAL DESCRIPTION

Total power 20W, matching LOUDSPEAKER of 2 x6 R. TWO INPUT SOURCE, ( Digital Sound Control )

GENERAL PART

Standby Mode Indicator : LCD display Clock active, LED backlight turn ON

OUTPUT stage Protection : Yes Temperature : YES Shorcircuit : Yes

LoudSpeaker D.C. Protection : Yes.

INDICATORS

Hum ( Volume Minimun - ) < 0.5

ECO Mode Indiicator : NC

ELECTRICAL DATA

dB

N/A Residual Noise ( Volume Minium ) 0.06

µW

DSC : ON/OFF Channel Differencer at -46dB 3

DBB ON/OFF

N/A Signal / Noise ( weighted ) ı 55

µW

VAC : N/A Channel Separation ( at 1 kHz ) ı 35 dB

SIS :

Tuner FM MODE 75KZH /(CD -6dB) Line Out ( Left / Right ) N.A

dB

INTERCONNECTS

Input Sensitity(

±

2 dB)rated ouput power at 1 kHz and 10kHz.

Line Output Voltage ( *1 )

WOOX :

TAPE NC Headphone 700mV+/-1dB, RL = 32˟

CD / USB 0 dB track ( Audio Disc 1, Trk 35 ) Subwoofer Out N.A

AUX IN NC Booster Out N.A

MP3 Link Nor: 500mV Lim: 350mV ~ 800mV CD 0dB Digital Coaxial Out N.A

OUTPUT POWER ( * 1 )

At THD = 10% (Measured with 20Hz-22KHz filter),

Power output ( RMS ) channel 10W*2 +/-1dB (1*)

LOUDSPEAKER ( BOXES ) Please to package document of Speaker Box Assy

Rated Impedance

: 6 Ohms at Bass driver,

( *1 ) Electrical parameters are to be measuremend at specker terminals across 6 Ohm load ( pure resistor )

with rated input signal in AUX mode; DSC OFF mode with DBB OFF

IS off unless specified otherwise

Remarks :Radio Power output ( RMS ) Limit:-3dB

TECHNICAL SPECIFICATION

Set DSC to Flat mode

Adjust volume to obtain 500mW across 6 ohm load at R/L speaker ouput

The 500mW will be used as 0dB reference

AUDIO SIGNAL PROCESSING

Micro Hi-Fi System with PLL Tuner ,USB, CD-MP3, 10W/ TWO channel Universal Class D Power Amplifier

1 ) DSC ( Digital Sound Control )

Input sinewave 500mV at 1kHz to R/L channel of MP3 Link socket

Tabel 1a ( Tolerance ± 3dB )

Frequency

DSC Modes with DBB Off VOL=20

10KHZ

100HZ DSC ON DSC OFF

2 ) DBB ( Dynamic Bass Boot )

Play CD testing signal of 1KHZ

Set DSC to OFF mode and switch off DBB

Adjust volume level will be as "18"

Tabel 2 ( Tolerance ± 3dB )

Frequency DBB OFF DBB ON

Signal to Noise Ratio ( 0dB,1kHz ) >= 60dBA ( A - weighted )

( 100 - 16,000 Hz ) >= 55dBA ( A - weighted )

Frequency Response ( 5dB+/- 3dB ), reference 1kHz 100Hz - 16kHz

THD + Noise ( 0dB, 1Khz ) <= 0.3 5

Channel Crosstalk ( 100Hz - 16,000 Hz ) >= 35 dB

( 0 dB, 1 KHz ) >= 40 dB

Output Resistance < = 1.5 kOhm

Output Voltage RL = 33 k ohm ( )dB, 1 Khz ) 830mVrms +/- 1.5dB

Channel Unbalance < = +/- 3 dB

GENERAL PART

Measurement are directly done at the connector on CDC board

Description Specification

TECHNIAL DESCRIPTION

USB

See also SH 190 USB Audio Module (300605)

Measurment are directly done at the coonector on the board

1-3

TECHNIAL DESCRIPTION

CD + MP3 - Part Specifications

CD mechnism refer to Philips standard specification

Measurement are directly done at the connector on CDC board

GENERAL PART

Description

Extern

Nom Lim Unit

Ohms

Output Voltage - Unloaded ( 0dB , 1 kHz ) No 0.5 ± 1 Vrms

Output Resistance No < 100

dB

Frequency Response ( 125 Hz - 16 kHz ) No 5 ± 3 dB

Channel Unbalance No < ± 2

dB

Signal to Noise Ratio ( A - weighted ) Yes 65 55 dBA

Signal to Noise Ratio ( Unweighted ) Yes 60 50

dB

Crosstalk ( 125Hz to 16kHz ) No 36

30 dB

Crosstalk ( 1kHz ) Yes 65 55

nW

Emphasis - / / /

Hum & Noise ( *1 ) No 400 500

TECHNICAL SPECIFICATION

THD (1KHz, 0dB) 2% 3% 500mV 1KHz input

Crosstalk (different source, 1KHz) 60dB 50dB 500mV input

/

Frequency response (5+/-3dB)

SNR wtd. dBA / /

150mV input

50dB 500mV 1KHz input

SNR wtd. dBA 62dBA 57dBA 500mV 1KHz input

SNR unwtd. 60dB

/ /

100 to 10KHz (overall)

AUX IN Part

/

Crosstalk (different source, 10KHz) / / /

Crosstalk (different source, 1KHz)

TECHNIAL DESCRIPTION

MP3 Link

MP3 Link Part

Crosstalk (different source, 10KHz) 45dB 35dB 500mV input

/ /

Nom. Limit Condition

Frequency response (-3dB) /

THD (1KHz, 0dB) / / /

/ /

L, R Channel Separation / / /

L, R Channel Separation 36dB 30dB 500mV input

SNR unwtd. /

1-4

TECHNIAL DESCRIPTION

TUNER using SI4705

GENERAL PART

WAVE RANGE TOLERANCE TUNING GRID

FM 87.5 - 108.00 MHz (12/05/79) Quartz Precision 50KHZ

NC

INDICATORS LCD DISPLAY

AERIAL

FM : 75 OHM ANT

MW : NC

ELECTRICAL DATA

A.M

Nom Limit Unit

F.M.

Nom Limit Unit

- 3 dB Limiting Point

: 17 23.5 dBf

Amplification Reverse

: 0 -4 dB

Amplification Reverse

/ / dB

Distortion ( RF 1mV, Frq Dev.75 kHz )

: 2 3 %

AGC Figure of Merit

/ / dB

Stereo - 46 dB Quieting

: 46 49 dBf

Distortion ( RF 50mV, M 80% )

/ /%

Crosstalk (RF1mV, Freq Dev.40kHz )

: 25 18 dB

IF

/ / kHz

IF

/ / MHz

/ //

Wave Range Noise Limited Sensitivity 26 dB

Search tuning

sensitivity dBf

IF Rejection

dB

///

Large Signal

Selectivity

S3 / S9 / 300kHz

dB

MW 600 kHz

Nom.

1500uV/M

MW 1400 kHz

Nom.

1500uV/M

/

Lim.

4000uV/M /

///

/ ///

Lim.

4000uV/M /

FM 98 MHz

Nom.

18dBf

/ 108 dBf 25

22 dBf

/ 116 dBf 30

Lim.

22dBf

35 dBf

TECHNICAL SPECIFICATION

Timer Setting : Clock and Timer

Timer Wakeup Mode : LAST SETTING (MODE)

TECHNIAL DESCRIPTION

SOFTWARE IMPLEMENTED CLOCK / TIMER FUNCTION WITH 75.000kHz QUARTZ OSCILLATOR.

GENERAL PART

1RRI7LPHU6HWWLQJV : 1 &ORFN$FFXUDF\ : Normal: 0.5 sec/day Limit : 1 sec/day

Remarks Time Setting : for 24hrs

Volume at Wakeup : Last Setting

,1',&$7256 'LVSOD\7\SH /&'

1-5