Philips MCM2050/05/12 Service Manual
Version 1.0
3142 785 36560
Micro music system
Published by LZ1129 Service Audio Subject to modification
©
Copyright 2011 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
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.
CONTENTS
5-1..1-1............................................................noitacificepslacinhceT
Version Variation.............................................................................2-1
Block diagram................................................................................3-1
Wiring diagram ..............................................................................3-2
LCD + DC + MP3 + KEY board
Layout diagram..................................................................4-2 4-3
MAIN board
Circuit diagram .........................................................................5-1
Layout diagram..................................................................5-2..5-3
Exploded view diagram .................................................................6-1
Circuit diagram ..........................................................................4-1
MCM2050/05/12
TECHNICAL SPECIFICATION
1-1
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)
1-2
TECHNICAL SPECIFICATION
:
:
:
:
:
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
1-3
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
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
1-4
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. /
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
1RRI7LPHU6HWWLQJV : 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
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