Philips MC-150 Service manual

Micro System

Version 1.0



MC150/21/22/25

Handling chip components ............................................................1-1

Technical specification...................................................................2-1

Service tools..................................................................................2-1

Service measurement setup..........................................................2-2

Connections and controls......................................................3-1...3-2

Disassembly diagram ....................................................................4-1

Pin description of ICs.............................................................4-2...4-4

Set block diagram..........................................................................5-1

Set wiring diagram.........................................................................5-2

LCD BOARD

circuit diagram ..........................................................................6-1

layout diagram..........................................................................6-2

HEADPHONE BOARD

circuit diagram ..........................................................................6-1

layout diagram..........................................................................6-2

KEY BOARD

circuit diagram ..........................................................................6-1

layout diagram..........................................................................6-2

POWER BOARD

circuit diagram ..........................................................................6-1

layout diagram..........................................................................6-3

CD BOARD

circuit diagram ..........................................................................7-1

layout diagram..........................................................................7-2

MAIN BOARD

circuit diagram - power amplifier...............................................8-1

circuit diagram - tuner...............................................................8-2

layout diagram - component side..............................................8-3

layout diagram - SMD side .......................................................8-4

Exploded view (main set)...............................................................9-1

Mechanical partslist.....................................................................10-1

Electrical partslist.........................................................................10-1

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 SL 0430 Service Audio Printed in The Netherlands Subject to modification

CLASS 1

LASER PRODUCT

1 - 1

All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wristband with resistance. Keep components and tools at this potential.

f ATTENTION

Tous les IC et beaucoup d´autres semi-conducteurs sont sensibles aux décharges statiques (ESD). Leur longévite pourrait être considérablement écourtée par le fait qu´aucune précaution nést prise à leur manipulation. Lors de réparations, s´assurer de bien être relié au même potentiel que la masse de l´appareil et enfileer le bracelet serti d´une résistance de sécurité. Veiller à ce que les composants ainsi que les outils que l´on utilise soient également à ce potentiel.

d WARNUNG

Alle ICs und viele andere Halbleiter sind empfindlich gegenüber elektrostatischen Entladungen (ESD). Unsorgfältige Behandlung im Reparaturfall kann die Lebensdauer drastisch reduzieren. Sorgen Sie dafür, daß Sie im Reparaturfall über ein Pulsarmband mit Widerstand mit dem Massepotential des Gerätes verbunden sind. Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem Potential.

ñ WAARSCHUWING

Alle IC´s en vele andere halfgeleiders zijn gevoelig voor electrostatische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen vermindern. Zorg ervoor dat u tijdens reparatie via een polsband met weerstand verbonden bent met hetzelfde potentiaal als de massa van het apparaat. Houd componenten en hulpmiddelen ook op ditzelfde potentiaal.

i AVVERTIMENTO

Tutti IC e parecchi semi-conduttori sono sensibili alle scariche statiche (ESD). La loro longevità potrebbe essere fortemente ridatta in caso di non osservazione della più grande cauzione alla loro manipolazione. Durante le riparationi occorre quindi essere collegato allo stesso potenziale che quello della massa delápparecchio tramite un braccialetto a resistenza. Assicurarsi che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale.

Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used. Safety components are marked by the symbol

Le norme di sicurezza estigono che l´apparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambiago identici a quelli specificati. Componenty di sicurezza sono marcati con

Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkeliijke toestand wordt teruggebracht en dat onderdelen, identiek aan de gespecificeerde, worden toegepast. De Veiligheidsonderdelen zijn aangeduid met het symbool

s Varning !

Osynlig laserstrålning när apparaten är öppnad och spärren är urkopplad. Betrakta ej strålen.

∂ Advarsel !

Usynlig laserstråling ved åbning når sikkerhedsafbrydere er ude af funktion. Undgå udsaettelse for stråling.

ß Varoitus !

Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina näkymättömälle laserisäteilylle. Älä katso säteeseen !

"Pour votre sécurite, ces documents doivent être utilisés par des spécialistes agréés, seuls habilités à réparer votre appareil en panne".

ESD

SAFETY

Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu beachten. Der Originalzustand des Gerätes darf nicht verändert werden. Für Reparaturen sind Originalersatzteile zu verwenden. Sicherheitsbauteile sind durch das Symbol markiert.

Les normes de sécurité exigent que l`appareil soit remis à l`état d`origine et que soient utilisées les pièces de rechange identiques à celles spécifiées. Les composants de sécurité sont marqués

CLASS 1

LASER PRODUCT

DANGER: Invisible laser radiation when open.

After servicing and before returning the set to customer perform a leakage current measurement test from all exposed metal parts to earth ground, to assure no shock hazard exists. The leakage current must not exceed 0.5mA.

AVOID DIRECT EXPOSURE TO BEAM.

HANDLING CHIP COMPONENTS

2 - 1

SERVICE TOOLS

TORX T10 screwdriver with shaftlength 150mm.........................................4822 395 50423

TORX screwdriver set SBC 163...............................................................4822 295 50145

Audio signal disc SBC 429........

..............................................................4822 397 30184

Playability test disc SBC 444...................................................................4822 397 30245

Test disc 5 (disc without errors ) + Test disc 5A (disc with dropout errors, black spots and fingerprints)

SBC 426/426A.....................................................................4822 397 30096

Burn in test disc (65 min. 1kHz signal at -30 dB level without “pause”)

.....4822 397 30155

Universal test cassette Fe SBC 420

........................................................4822 397 30071

anti-static table mat large 1200x650x1.25mm 4822 466 10953

small 600x650x1.25mm 4822 466 10958

anti-static wristband 4822 395 10223 connection box (3 press stud connections, 1MΩ)

4822 320 11307 4822 320 11305

extendible cable (2m, 2MΩ, to connect wristband to connection box) connecting cable (3m, 2MΩ, to connect table mat to connection box) 4822 320 11306 earth cable (1MΩ, to connect any product to mat or to connection box) 4822 320 11308 KIT ESD3 (combining all 6 prior products - small table mat) 4822 310 10671 wristband tester 4822 344 13999

AVAILABLE ESD PROTECTION EQUIPMENT

TECHNICAL SPECIFICATIONS

GENERAL

Mains voltage -/21

-/22/25

: 110 - 127 / 220 - 240V

230V ± 10%

Mains frequency

-/22/25

: 50 / 60 Hz Switchable

50 Hz

Battery

remote

:3 V (R6 x 2)

Power consumption

normal :

Standby

:< 3 W

Dimension (W x H x D)

: 156 x 222 x 216 mm

Weight (without speakers)

: 2.95 Kg

AMPLIFIER

Output power mains : 2 x 5 W RMS Speaker impedance

:2 x 3 ohm

Frequency response within ±3dB

: 60 Hz - 14 kHz

TUNER - FM SECTION

: 87.5 - 108 MHz

IF frequency

: 10.7 MHz ± 0.02 MHz

Sensitivity

< 22 dBf at 26dB S/N

Selectivity

300kHz : 40 dB

IF rejection

: 65 dB

Image rejection

:> 20 dB

Distortion at RF1mV, Dev. 75kHz

:< 3%

TUNER - AM SECTION

Tuning range MW 531 - 1602 kHz

IF frequency

450 kHz ± 1 kHz

Sensitivity

≥ 18 dB S9 / 300kHz

IF rejection

:> 24 dB

Distortion at RF=50mV, M=80%

:< 5%

Image rejection ratio

:> 20 dB

AUDIO CASSETTE RECORDER

Frequency response : 80 - 10000 Hz (8dB) Wow & flutter : ≤ 0.48 % JIS Tape speed : 4.76 cm/s ± 3 % Fast wind/Rewind C60 :

< 130 s

S/N ratio (unw.) Ferro : 36 dB

DISC PLAYER

Frequency response : 63Hz - 14kHz < ±3dB S/N ratio (A-wght.) : > 62 dBA Total harmonic distortion : < 1.5 %

Channel separation 1 kHz : 35 dB Channel unbalance : < ± 2 dB

Clock accuracy

15 W < 4 seconds per day

Dynamic Bass Boost

: DBB1, DBB2, Off

Headphone output at 32Ω : 15mW ± 2dB (Max Vol.)

Grid

Grid -/22/25: 9kHz

-3 dB Limiting Point

:< 23.5 µV

Crosstalk at RF1mV, Dev. 40kHz

:> 26 dB

:> 35 dB for Freq > 40kHz : 15/50 µS

Outband attentuation Emphasis

Bias system : 73 kHz ± 10 Channel separation 1kHz:> 18 dB Channel difference at overall

≤ 4 dB

≤

Normal

-/21 :

-/22/25

Tuning range :

50kHz/100kHz

-/21

50kHz

-/22/25

530 - 1700 kHz

-/21

-/21: 9kHz/10kHz

2 - 2

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

DUT

RF Generator

e.g. PM5326

S/N and distortion meter

e.g. Sound Technology ST1700B

Tuner SW

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).

Ri=50Ω

Aerial replacement

Capacitor

R=50Ω

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

DUT

S/N and distortion meter

e.g. Sound Technology ST1700B

Frame aerial

e.g. 7122 707 89001

Tuner AM (MW,LW)

To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday«s cage.

RF Generator

e.g. PM5326

Ri=50Ω

Low pass filter 22kHz

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

S/N and distortion meter

e.g. Sound Technology ST1700B

DUT

Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) L.P.F. = 13

order filter 4822 395 30204

PREP ARATIONS AND CONTROLS

Preparations

Rear connections

The type plate is located at the rear of the

system.

For users in the U.K.: please follow the

instructions .

Power

Before connecting the AC power cord to the

wall outlet, ensure that all other connections

have been made.

WARNING!

–For optimal performance, use only the

original power cable.

–Never make or change any connections

with the power switched on.

To avoid overheating of the system

, a safety

circuit has been built in. Therefore, your

system may switch to Standby mode

automatically under extreme conditions. If

this happens, let the system cool down

before reusing it (not available for all versions).

Antennas Connection

Connect the supplied AM loop antenna and FM

antenna to the respective terminals. Adjust the

position of the antenna for optimal reception.

AM Antenna

● Position the antenna as far as possible from a TV,

VCR or other radiation source.

Preparations

FM Antenna

● Extend coil antenna at the back of the unit fully

for optimum reception.

Speakers Connection

Front Speakers

Connect the speaker wires to the SPEAKERS

terminals, right speaker to "RIGHT" and left

speaker to "LEFT", coloured (marked) wire to

"+" and black (unmarked) wire to "-".

● Fully insert the stripped por tion of the speaker

wire into the terminal as shown.

Notes:

–For optimal sound performance, use the

supplied speakers.

– Do not connect more than one speaker to any

one pair of

speaker terminals.

– Do not connect speakers with an impedance

lower than the speakers supplied. Please refer to

the SPECIFICATIONS section of this manual.

Before using the remote control

Pull out the plastic protective sheet.

Select the source you wish to control by

pressing one of the source select keys on the

remote control (for example CD, TUNER).

Then select the desired function (for example

É, í, ë).

REPEAT

SHUFFLE

SLEEP

VOL

Replacing battery (lithium

CR2025) into the remote control

Pull out the knob

slightly to the right.

Pull out the battery compar tment

Replace a new battery and fully inser t the

battery compar tment back to the original

position.

CAUTION!

Batteries contain chemical substances, s o

they should be disposed off properly.

PUSH

PULL

3-1

PREP ARATIONS AND CONTROLS

Controls

Controls on the system and

remote control

STANDBY-ON / y

–switches the system to standby/on.

SOURCE (CD/ TUNER/ TAPE)

–switches on the system.

– selects the respective sound source for CD/ FM/

MW/ TAPE.

DBB1 / DBB2 (DBB)

–(Dynamic Bass Boost) enhances the bass.

Display

– shows the status of the system.

Mode Selection

STOP 9

for CD ................. stops CD playback or erase a

CD program.

PLAY•PAUSE ÉÅ

for CD ................. starts or pauses CD playback.

¡1 / 2™ / à TUNE á (í /ë)

for CD ................. skips to the beginning of a

current track/previous/ next

track.

fast searches back and forward

within a track/CD.

for Tuner ............. tunes to radio stations.

................................. selects a preset radio station.

Ta pe Deck Operation

RECORD 0 ....... starts recording.

PLAY 2 ................. starts playback.

à / á ............... fast rewinds/forwards the tape.

STOP•OPEN ... stops the tape; opens the tape

compartment.

PA US E ................... pauses recording or playback.

VOLUME 3 / 4 (VOL 3 / 4 )

– adjusts volume level.

– adjusts the hours and minutes for clock/ timer

functions.

iR SENSOR

– infrared sensor for remote control.

TIMER / CLOCK

– activates/deactivates or sets the timer function.

– sets the clock function.

–views the clock time.

REPEAT / SHUFFLE

– repeats a track/CD program/ entire CD.

–plays CD tracks in random order.

PROGRAM (PROG)

for CD .................programs tracks and reviews the

program.

for Tuner ............. programs tuner stations manually

or automatically.

– connect headphones.

OPEN•CLOSE

– opens/closes the CD door.

MUTE

–switches playback sound off and on.

SLEEP

– activates/deactivates or selects the sleeper time.

Notes for remote control:

– First select the source you wish to control

by pressing one of the source select keys on

the remote control (for example CD ,

TUNER).

– Then select the desired function (for

example

3-2

PREP ARATIONS AND CONTROLS

Important notes for users in the

U.K.

Mains plug

This apparatus is fitted with an approved 13

Amp plug. To change a fuse in this type of plug

proceed as follows:

Remove fuse cover and fuse.

Fix new fuse which should be a BS1362 5 Amp,

A.S.T.A. or BSI approved type.

Refit the fuse cover.

If the fitted plug is not suitable for your socket

outlets, it should be cut off and an appropriate

plug fitted in its place.

If the mains plug contains a fuse, this should

have a value of 5 Amp. If a plug without a fuse

is used, the fuse at the distribution board

should not be greater than 5 Amp.

Note: The severed plug must be disposed of to

avoid a possible shock hazard should it be

inserted into a 13 Amp socket elsewhere.

How to connect a plug

The wires in the mains lead are coloured with

the following code: blue = neutral (N),

brown = live (L).

¶ As these colours may not correspond with the

colour markings identifying the terminals in

your plug, proceed as follows:

–Connect the blue wire to the terminal

marked N or coloured black.

–Connect the brown wire to the terminal

marked L or coloured red.

–Do not connect either wire to the ear th

terminal in the plug, marked E (or e) or

coloured green (or green and yellow).

Before replacing the plug cover, make cer tain

that the cord grip is clamped over the sheath

of the lead - not simply over the two wires.

Recording and playback of material may

require consent. See Copyright Act 1956 and

The Performer’s Protection Acts 1958 to 1972.

Norge

Typeskilt finnes på apparatens underside.

Observer: Nettbryteren er sekundert

innkoplet. Den innebygde netdelen er

derfor ikke frakoplet nettet så lenge

apparatet er tilsluttet nettkontakten.

For å redusere faren for brann eller elektrisk

støt, skal apparatet ikke utsettes for regn eller

fuktighet.

Italia

DICHIARAZIONE DI CONFORMITA ’

Si dichiara che l’apparecchio MC230, MC235

Philips risponde alle prescrizioni dell’ar t. 2

comma 1 del D.M. 28 Agosto 1995 n. 548.

Fatto a Eindhoven

Philips Consumer Electronics

Philips, Glaslaan 2

5616 JB Eindhoven, The Netherlands

CAUTION

Use of controls or adjustments or

performance of procedures other than

herein may result in hazardous

radiation exposure or other unsafe

operation.

VAROITUS

Muiden kuin tässä esitettyjen

toimintojen säädön tai asetusten

muutto saattaa altistaa vaaralliselle

säteilylle tai muille vaarallisille

toiminnoille.

3-3

PREP ARATIONS AND CONTROLS

Troubleshooting

WARNING

Under no circumstances should you try to repair the system yourself, as this will invalidate the

warranty. Do not open the system as there is a risk of electric shock.

If a fault occurs, first check the points listed below before taking the system for repair. If you

are unable to remedy a problem by following these hints, consult your dealer or service centre.

Problem Solution

CD OPERATION

“no cd” is displayed. –Insert a disc.

– Check if the disc is inserted upside down.

–Wait until the moisture condensation at the lens

has cleared.

– Replace or clean the disc, see “Maintenance”.

– Use a finalised CD-RW or CD-R.

RADIO RECEPTION

Radio reception is poor. – If the signal is too weak, adjust the antenna or

connect an external antenna for better reception.

–Increase the distance between the Micro HiFi

System and your TV or VCR.

TAPE OPERATION / RECORDING

Recording or playback cannot be made. –Clean deck parts, see “Maintenance”.

– Use only normal (IEC I) tape for recording.

– Apply a piece of adhesive tape over the missing

tab space.

GENERAL

The system does not react when buttons – Remove and reconnect the AC power plug and

are pressed. switch on the system again.

Sound cannot be heard or is of poor – Adjust the volume.

quality. –Disconnect the headphones.

– Check that the speakers are connected correctly.

– Check if the stripped speaker wire is clamped.

The left and right sound outputs are – Check the speaker connections and location.

reversed.

The remote control does not function – Select the source (CD or TUNER, for example)

properly. before pressing the function button (É,í,ë).

– Reduce the distance between the remote control

and the system.

–Insert the batteries with their polarities

(+/– signs) aligned as indicated.

–Replace the batteries.

–Point the remote control directly toward

IR sensor on the front of the system.

The timer is not working. – Set the clock correctly.

– Press TIMER to switch on the timer.

– If a recording is in progress, stop the recording.

The Clock/Timer setting is erased. –Power has been interrupted or the power cord

has been disconnected. Reset the clock/timer.

Tr oubleshooting

3-4

+ 16 hidden pages

Philips MC-150 Service manual

TABLE OF CONTENTS

TECHNICAL SPECIFICATIONS

PREP ARATIONS AND CONTROLS

Preparations

Controls

Troubleshooting