Philips MC-127 Service Manual

CD playback Compact design Micro Hi-Fi System

MC127

-/05/12

CONTENTS

Technical specification and disassembly diagrams..........................1

Service and safety instructions.........................................................2

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

Wiring diagram ..............................................................................4-1

DISPLAY+ MAIN+ TUNER+ LINE IN board

Circuit diagram...................................................................5-1..5-3

Layout diagram .........................................................................5-4

Power board

Circuit diagram .........................................................................6-1

Layout diagram .........................................................................6-2

Exploded view diagram .................................................................7-1

Revision list ...................................................................................8-1

©

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 SW 1125 Service Audio Subject to modification

Version 1.0

3141 785 36420

General description: MC127- PORTABLE CD SOUNDMACHINE TUNER

LIFETIME : 5 YEARS (ACC. TO UAN-D1611) PERFORMANCE CLASSES :

TUNER

SUPPLY,

AMPLIFIER

I x x x 3

II x 4

III 5

SAFETY REQUIREMENTS:

IEC 60065:2001(SEVENTH EDITION)+AI:2005------SAFETY

RADIATION, IMMUNITY REQUIREMENTS: (EMC)

EN55013:2001+A1:2003+A2:2006;EN55020:2007 EN61000-3-2:2006+A2:2009;EN61000-3-3:2008 EN61000-4-5:2006; EN61000-4-11:2004

CLIMATIC REQUIREMENTS: (acc. to UAN-D1590) All climates: -10 °C till +50 °C (Functional); Set has to be pre-conditioned for 2 hour, except CD function 8 For all measurements: 25 °C 9

POWER SUPPLY: MAINS (AC) operation DC (int. or ext.) operation / Backup Buffer

Voltage

Battery type: 10

selection: Selection:

See table below

Frequency: External DC: No 12

POWER CONSUMPTION:

Standby: Less than ＜1W Maximum: 12W Maximum: 14

General:

Q and R according to production division rules : Q < 1% (Major), Q < 4% (Minor) Measured according to: R < 3% (CE52)

DERIVED VERSIONS: APPROBATION

Versio

n

93

Voltage on

typeplate

240V, 50Hz

REMARKS:

SPEAKER

BOXES

RECORDER CLOCK CD DCC TELEPHONE

Standby: 13

Tolerance Frequency Tuner

10%

(216V – 264V);

50Hz

FM,

REC.

PLAYER

6

7

11

UK

15

16

1 2

TUNER PART

TECHNICAL description:

2011-04-01

1

2

3

CDSM WITH

MC127

SET SPECIFICATION

(circuitry) FM (active components) FM

RF

SI4704 SI4704

1

IF Detector Decoder

SI4704 SI4704

SI4704

GENERAL part:

WAVE RANGE TOLERANCES TUNING

FM 87.5MHz - 0.3 MHz

108MHz + 0.5 MHz 9

10

AERIAL:

FM telescope - 540 mm 12

FM wire : N/A Execution - Rotational 180° 13

INDICATORS:

Pointer stroke: Execution pointer: 14 Knob indication over: Field Strength: 15

ELECTRICAL DATA:

AM: nom. limit FM:

wave range Sensitivity for

18 24 55 122dB 22 20 50 111dB

FM

nom. lim.

31

μV/m

unit

REMARKS:

SUPPLY, AF-AMPLIFIER & LOUDSPEAKER (Boxes) PART:

TECHNICAL description:

2011-04-01

1

2

3

QD

noise limited sensitivity

50mW

dBμV/m

dBf

μV

CDSM WITH

MC127

-3dB limiting point Amplification reserve AFC holding range Distortion (RF 1mV, Δf 67.5kHz) Stereo -46dB quieting

Cross-talk (RF 1mV, Δf 40kHz, 1kHz) IF

(26dB)

Image

rejectio

n

IF

rejectio

n

dBf dB dB dB

large

signal

f f

mV/m

SET SPECIFICATION

1MHz 6

1MHz 7

nom.

20 26 dBf

0 -4 dB

-

1 7 %

48 52

25 20 dB

limit

29 30

2 3 4

5

8

16 17 18 19 20 21 22 23

24

25 26 27

28

Power supply Tone Control AF-Amplifier Loudspeaker Active

components Passive components 4 GENERAL part: Aux in jack type Ø 3.5mm 5 Loudspeaker filter, high pass None 6 Loudspeaker filter, low pass None 7 Power stage protection Temperature – YES; Short circuit – YES 8 Public address No 9

INDICATORS:

Output power or VU-meter No 11 Frequency response No 12 Low power (battery) No

14

UTC8227 1

2 X 8Ω, 2W

3

13

ELECTRICAL DATA:

TONE/EQUALIZER/DBB DSC Balance control No 15 Mechanical noise (ISO 1996) 16 Noise overall (ISO) 17

Channel difference at -46dB Type: < 3 dB 18

Hum (vol.max.-20dB to vol.min.) Limit: 2mV 19 Residual noise(volume min) Limit: 2mV 20 DBB on (Vol.max.-20dB): 100Hz, +6dB

(±2dB) w.r.t. 1kHz at DBB on

DBB off (Vol.max.-20dB): 100Hz, -2dB

(±2dB) w.r.t. 1kHz at DBB on

Input sens.:Nom. 500 mV 23

for 50mW Limit: 600 mV 24

Line outp.: Nom. mV 25

voltage Limit: mV 26

OUTPUT POWER: Mains operation: D=10% 28

Music power (MPO) / (PMPO): (acc. to DIN45324) 29 Short term maximum output power: - (acc. to IEC 60268-15) 30 Long term maximum output power: - (acc. to IEC 60268-15) 31 Headphone output voltage/power: n.a. 32 Bandwidth FTC – 1dB at: n.a. (acc. to FTC/16/1/D/432) 33 Bandwidth DIN – 3dB at: - (acc. to IEC 60268-15) 34 Frequency response at Vol. max – 20dB: LOUDSPEAKER (output):

Low pass crossover frequency: - kHz tolerance: Hz 36 High pass crossover frequency: - kHz tolerance: Hz 37 Short term maximum output power: - W (acc. to IEC 60268-15) 38 Long term maximum output power: - W (acc. to IEC 60268-15) 39 Frequency response at: - Hz kHz 41

REMARKS:

27 : Measured in Tuner mode; 28: CD or Tape mode.

DBB has no dynamic, fixed to

6dB

22

2 X 1W 8Ω

typ. 60Hz to 20kHz (±

3dB)

Limit: -1dB 27

35

21

42

2011-04-01

1

2

3

CDSM WITH

MC127

SET SPECIFICATION

TAPE function: (ECO-MTF-PA-SD-MS (FE) Module)

General description:

3 5

6 7

Mechanical specification:

8

1 2

4

10 11 12 13 14 15 16 17 18 19

Indicators:

Recording level No 21 Play back level No 22 Tape counter No 23

Electrical data:

Bias system FM/AM 24 RIF switch No 25 Erase system FM/AM 26 Erasing damping 27 Channel separation (IEC1) 28 Track separation (IEC1) 29 Frequency response (PB) 30 SNR 250nWb/m 31 Signal/hiss 250nWb/m 32 Signal/hum 250nWb/m 33 Channel difference (PB) 34 Distortion 250nWb/m 35 ALC attack time 36 ALC release time 37 Crosstalk Between forward to reverse track 38 REMARKS: 31: * not according to PQR clause 18.5 class I 31: ** Chromium performance not fulfilled

Amplification Reserve for Tape = 1dB ±2dB

20

9

39

For details, please see specification SH-190 of ECO-MTF-PA-SD (3140 117 14890).

CD-PART

Technical description:

Input Output Motor/control Logic control 1

: ( CD MECHAISM-DA11B3VF)(SANYO) 5

2011-04-01

1

2

3

CDSM WITH

MC127

SET SPECIFICATION

Active components MMSA9258(Mitsu

mi) Passive components Signal processing HF-preamplifier Active components SC9614 SC9614 SC9640 5 Passive components

Indicators/Display/Keys:

Display: Digits LCD for Track No. display 7 Keys: one 4-position slider switch, 6 tact switches on unit, 6 for CD -: Play, Stop, Previous/Search down,

Next/Search up, Program/Program review, CD-modes (Repeat/Shuffle)

Playability: (acc. To AR 30-05-239) Limit Typical Testdisc 9

Wedge Eccentric

Fingerprint No audible defect TNO 11of Subchassis 8A 12 Black dot Skew 0.6mm No audible defect TNO 1,6 of 0.6mm skew (7104 099

Bad HF track No audible defect TNO 8 of Subchassis 8A 15 Heavy fingerprint No track

Playback position Horizontal, Normal position (Set is located on a flat surface, floor) 17

- Playback of above mentioned tracks possible without track loss or audible defects. 18

- Double black dot, max. diameter, thin/thick disk is according to PQR or AR 30-05-239)

- This unit can playback (only) CD-R or CD-RW discs. For performance specification, please refer to module specification of CD99 (3103 308 52190) Shock resistance: (acc. to AR 13-A6-CD-068)

± Z axis ± X or Y axis

Acoustical noise:

Mode: Play/Pause 35 dBA max. (45 dbA in Search mode) 21 Mode: Jump (Next) 45 dBA max. 22 AUDIO part: (Measured with Audio Signals Disc-1, 7104 078 04911 on Speakers or Headphone socket with nom.

load)

Typ. Limit 23 Output level (TNO1) 24 SNR unwtd. 60 dB 48 dB 25 SNR wtd. dBA 65 dBA 57 dBA 26 Crosstalk (1kHz) 40 dB 26 dB 27 Crosstalk (10kHz) 30 dB 16 dB 28 Frequency response

Vol.max.–20dB (DBB on)

THD (1kHz, -6 dB) 0.2 % 2 % 30 THD (10 kHz, -20 dB) < 1 % < 3 % 31 Channel difference 2 dB 3 dB 32 Frequency accuracy - +/-0.5 % 33 De-emphasis

REMARKS:

3

6

500 μm 700 μm 150 μm 200 μm TNO 1,24 of 200μm disc

500 μm 600 μm

TNO 10 of Subchassis 8A 16

jumps/plops

5 G 19 5 G m 20

+9dB +3dB

15μs / 50μs Switchable via Subcode information

TNO 7,9 of SBC 444A (7104 099 24990) 10

24960)

TNO 13 of SBC 444A (7104 099 24990) 13

28260)

±2dB at 100Hz ±2dB at 10kHz

- Amplification reserve for CD = +2dB (±2dB); Ref. Level for CD is a 0dB track instead of a –6dB track.

SC9640 2

Servoprocessor

(7104 099

4

8

11

14

29

34

35

Feature Specification of MP3 CD

CODEC / COMPRESSION Format Compatibility

2011-04-01

1

2

3

CDSM WITH

MC127

SET SPECIFICATION

√

)

√

MP3 X

MPEG 2.5 X MP3 Pro X WMA X AAC X

Playback CAPACITY

Maximum number of

X

40

35

36 37 38 39

tracks per CD Maximum number of

X

41

albums per CD

DISC TYPE

CD-RW CD-R 8 cm 12 cm

DISC SIZE (MB

185 225 650 680 700

42 43 44 45

46 47 48 49 50

ISO-9660 + Joliet X Joliet X UDF (Direct CD from X ID3 X

Packet writing X

51 52 53 54

55

Multi-session CDDA X Multi-session MP3 X Closed session Open session Finalized disc Unfinalized disc

56 57 58 59 60 61

CDDA + MP3/WMA X MP3/WMA + CDDA X MP3/WMA + CDDA

X

62 63 64

+ MP3/WMA CDDA + MP3/WMA

X

65

+ CDDA Video + CDDA X

CDDA + Data X MP3/WMA + Data X

66 67 68

2011-04-01

2

1

CDSM WITH

MC127

3

SET SPECIFICATION

)

√

y

BITRATE (kbps

64 -192 X 8 – 320 X Variable X

Sampling RATE (kHz

8 X

11.025 X 12 X

16 X

22.05

24 X 32 X

44.1 X 48 X 96 X

UPGRADE ABILITY

MP3 X MP3 Pro X WMA X AAC X

SOUND

Single Channel Dual Channel Stereo & joint Stereo Intensity Stereo MS Stereo

LANGUAGE SUPPORT

English X Chinese X

Playlist Compatibilit

WinAmp X Realjukebox X MS Mediaplayer X MusicMatch X

X

70 71 72

73 74

75 76 77 78 79 80 81 82

83 84 85 86

87 88 89 90 91

92 93

94 95 96 97

2011-04-01

2

1

CDSM WITH

MC127

3

SET SPECIFICATION

e

MEASUREMENT SETUP

Tuner FM

2-1

Bandpass

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

DUT

250Hz-15kHz

e.g. 7122 707 48001

Ri=50:

S/N and distortion meter

e.g. Sound Technology ST1700B

Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).

Tuner AM (MW,LW)

RF Generator

e.g. PM5326

Ri=50:

DUT

Frame aerial

e.g. 7122 707 89001

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

S/N and distortion meter

e.g. Sound Technology ST1700B

To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday´s cage. Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).

CD

Use Audio Signal Disc (replaces test disc 3)

DUT

L

R

SBC429 4822 397 30184

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

-

Recorder

Use Universal Test Cassette CrO2 SBC419 4822 397 30069

or Universal Test Cassette

LF Generator

e.g. PM5110

Fe SBC420 4822 397 30071

DUT

L

R

S/N and distortion met

e.g. Sound Technology ST170

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter