Philips MC-M350/21 User manual

GB
CLASS 1
LASER PRODUCT
Service
Service
Service
Service
Service
MC-M350/21/22/25
TABLE OF CONTENTS Page
Location of PCBs & Version Variations ......................1-2
Technical Specifications .............................................1-3
Measurement setup....................................................1-4
Service Aids, Safety Instruction, etc...........................1-5
Preparations & Controls .............................................1-7
Disassembly Instructions............................................... 2
Set Block diagram .........................................................3
Set Wiring diagram ........................................................4
Key Board ......................................................................5
Power Board ..................................................................6
Tuner Board ...................................................................7
MCU & CD Board ..........................................................8
Diode & Connection Boards...........................................9
Main Board ..................................................................10
Set Mechanical Exploded View & Parts List ............... 11
©Copyright 2002 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.
Published by SL 0325 Service Audio Printed in The Netherlands Subject to modification
Micro System
3140 785 32550
Version 1.0
ServiceManual

1-2
LOCATIONOFPRINTEDCIRCUITBOARDS
VERSION VARIATIONS
MAIN BOARD
TUNERBOARD
POWER BOARD
MCU& CD
BOARD

KEY
BOARD
DIODE
BOARD
Type/Versions MC-M350
Features &
Board in used
RDS function
Aux Input
ECO Standby
Digital Coaxial Out x
x
x
x
x
Subwoofer Out
Line Out
Headphone Out
/21 /25
x
x
/22
AC Voltage Selector x
Non-Cenelec Tuner
Cenelec Tuner xx
x

x
xx

1-3
SPECIFICATIONS
GENERAL:
Mains voltage
/21 : 120V / 230V ±15%
Switchable
/22/25 : 230V ±10%
Mains frequency
/21 : 50/60Hz
/22/25 : 50Hz
Power consumption
/22/25 : < 1W at ECO Standby
: < 9W at Standby
(DEMO mode off)
: 53W at Active
Clock accuracy : < 4 seconds per day
Dimension centre unit : 155 x 220 x 270mm
TUNER:
FM
Tuning range : 87.5-108MHz
IF frequency : 10.7MHz ±20kHz
Aerial input : 75ΩCoaxial
Sensitivity at 26dB S/N : < 22dBf
Selectivity at S9/300kHz : > 33dB
IF Rejection : > 60dB
Image Rejection : > 20dB
Distortion at RF=1mV, dev. 75kHz : < 3%
-3dB Limiting point : < 23.5dB
Crosstalk at RF=1mV, dev. 40kHz : > 26dB
Modulation Hum : > 45dB
AM Suppression I/P: 48~82dBf : > 25dB
AM (MW)
Tuning range
/21/22/25 : 531-1602kHz
/21 : 530-1700kHz
Grid /21 : 9kHz / 10kHz
/22/25 : 9kHz
IF frequency : 450kHz ±1kHz
Aerial input : Frame aerial 18.1µH
Sensitivity at 26dB S/N : < 3.25mV/M
Selectivity at S9/300kHz : > 15dB
AGC Figure of Merit : > 25dB
IF rejection : > 24dB
Image rejection : > 20dB
Distortion at RF=50mV, m=80% : < 5%
Mudulation Hum with REC or : > 40dB
Spurious Response Rejection : > 28dB
LW (Only for /22/25 )
Tuning range : 153-279kHz
Grid : 3kHz
IF frequency : 450kHz ±1kHz
Aerial input : Frame aerial 18.1µH
Maximum Sensitivity : < 1.5mV/M
Sensitivity at 26dB S/N : < 6.0mV/M
Selectivity at S9/300kHz : > 24dB
IF rejection : > 26dB
Image rejection : > 20dB
Distortion I/P:5~50mV : < 5%
Modulation Hum with REC on : > 40dB
AMPLIFIER:
Output power (6Ω, 1kHz, 10% THD) : 30W
Frequency response within -3dB : 60Hz-14kHz
Digital Sound Control (DSC) : Optimal,Classic,Jazz,
Rock
DBB : ON/OFF
Incredible Surround (IS) : ON/OFF
Input sensitivity (±3dB) for Rated Output Power at 1kHz
Aux in : 500mV; Rs=600Ω
Tuner in : FM67.5kHz, AM80%Modulation
CD in : -6dB track
Tape in : 250nWb/m
Output sensitivity
Headphone output at 32Ω:15mW ±2dB
CASSETTE RECORDER:
Number of track : 2 Tracks (Stereo)
Tape speed : 4.76 cm/sec ±2%
Wow and flutter : < 0.4% DIN
Fast-wind/Rewind time C60 : 130 sec
Bias system : 78kHz ±10kHz
Rec/Pb freq. response within 8dB : 80Hz - 10kHz
Signal to Noise Ratio (A-weighted) : ≥48dBA
Distortion 250nWb/m : < 5%
Channel Difference at overall : < 4dB
COMPACT DISC:
Frequency response within ±3dB : 63Hz - 14kHz
Output level (in Vrms) : 500mV, Zout = 100Ω
Signal/Noise ratio (A-weighted): > 62dBA
Distortion at 1kHz : < 0.02%
Channel unbalance at 1kHz : ≤2dB
Channel separation at 1kHz : > 30dB
Emphasis : 15/50 µS (switched
automatically)
THD Noise(1kHz) : 1.00%
Outband Attenuation : > 20dB for Freq. > 40kHz
MP3 - CD :
Bit rates : 32K - 320Kps
Sampling rates : 32KHz/44.1KHz/48KHz

LF Generator
e.g. PM5110
Recorder
Use Universal Test Cassette CrO2 SBC419 4822 397 30069
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
L
R
DUT
or Universal Test Cassette Fe SBC420 4822 397 30071
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
L
R
DUT
CD
Use Audio Signal Disc
(replaces test disc 3) SBC429 4822 397 30184
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.
Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).
RF Generator
e.g. PM5326
Ri=50Ω
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
Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).
Ri=50Ω
Tuner FM
MEASUREMENT SETUP
1-4

1-5
SERVICE AIDS
Service Tools:
Universal Torx driver holder .................................. 4822 395 91019
Torx bit T10 150mm ............................................. 4822 395 50456
Torx driver set T6 - T20......................................... 4822 395 50145
Torx driver T10 extended ...................................... 4822 395 50423
Cassette:
SBC419 Test cassette CrO2................................. 4822 397 30069
SBC420 Test cassette Fe ..................................... 4822 397 30071
MTT150 Dolby level 200nWb/M............................ 4822 397 30271
Compact Disc:
SBC426/426A Test disc 5 + 5A ............................ 4822 397 30096
SBC442 Audio Burn-in Test disc 1kHz ................. 4822 397 30155
SBC429 Audio Signals disc .................................. 4822 397 30184
Dolby Pro-logic Test Disc...................................... 4822 395 10216
ESD Equipment:
Anti-static table mat - large 1200x650x1.25mm ... 4822 466 10953
Anti-static table mat - small 600x650x1.25mm..... 4822 466 10958
Anti-static wristband .............................................. 4822 395 10223
Connector box (1MΩ)............................................ 4822 320 11307
Extension cable
(to connect wristband to conn. box).................. 4822 320 11305
Connecting cable
(to connect table mat to conn. box) .................. 4822 320 11306
Earth cable (to connect product to mat or box) .... 4822 320 11308
Complete kit ESD3
(combining all above products)......................... 4822 320 10671
Wristband tester .................................................... 4822 344 13999
HANDLING CHIP COMPONENTS

1-6
GB
WARNING
All ICs and many other semi-conductors 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 wrist wrap with resistance.
Keep components and tools also at this
potential.
F
ATTENTION
Tous les IC et beaucoup d’autres
semi-conducteurs sont sensibles aux
décharges statiques (ESD).
Leur longévité pourrait être considérablement
écourtée par le fait qu’aucune précaution n’est
prise à leur manipulation.
Lors de réparations, s’assurer de bien être relié
au même potentiel que la masse de l’appareil et
enfiler 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.
ESD
D
WARNUNG
Alle ICs und viele andere Halbleiter sind
empfindlich gegenüber elektrostatischen
Entladungen (ESD).
Unsorgfältige Behandlung im Reparaturfall kan
die Lebensdauer drastisch reduzieren.
Veranlassen Sie, dass Sie im Reparaturfall über
ein Pulsarmband mit Widerstand verbunden
sind mit dem gleichen Potential wie die Masse
des Gerätes.
Bauteile und Hilfsmittel auch auf dieses gleiche
Potential halten.
NL
WAARSCHUWING
Alle IC’s en vele andere halfgeleiders zijn
gevoelig voor electrostatische ontladingen
(ESD).
Onzorgvuldig behandelen tijdens reparatie kan
de levensduur drastisch doen verminderen.
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 riparazioni occorre quindi essere
collegato allo stesso potenziale che quello della
massa dell’apparecchio tramite un braccialetto
a resistenza.
Assicurarsi che i componenti e anche gli utensili
con quali si lavora siano anche a questo
potenziale.
“Pour votre sécurité, ces documents
doivent être utilisés par des spécia-
listesagréés,seulshabilitésàréparer
votre appareil en panne”.
GB
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used.
NL
Veiligheidsbepalingen vereisen, dat het apparaat bij reparatie in
zijn oorspronkelijke toestand wordt teruggebracht en dat onderdelen,
identiek aan de gespecificeerde, worden toegepast.
F
Les normes de sécurité exigent que l’appareil soit remis à l’état
d’origine et que soient utiliséés les piéces de rechange identiques
à celles spécifiées.
D
Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu
beachten. Der Original zustand des Geräts darf nicht verändert werden;
für Reparaturen sind Original-Ersatzteile zu verwenden.
I
Le norme di sicurezza esigono che l’apparecchio venga rimesso
nelle condizioni originali e che siano utilizzati i pezzi di ricambio
identici a quelli specificati.
"After servicing and before returning set to customer perform a
leakage current measurement test from all exposed metal parts to
earth ground to assure no shock hazard exist. The leakage current
must not exceed 0.5mA."
CLASS 1
LASER PRODUCT
3122 110 03420
GB
Warning !
Invisible laser radiation when open.
Avoid direct exposure to beam.
S
Varning !
Osynlig laserstrålning när apparaten är öppnad och spärren
är urkopplad. Betrakta ej strålen.
SF
Varoitus !
Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen!
DK Advarse !
Usynlig laserstråling ved åbning når sikkerhedsafbrydere er
ude af funktion. Undgå udsaettelse for stråling.

PREPARATIONS AND CONTROLS
1-7
Preparations
speaker
(right) speaker
(left)
AC power cord
AM loop 
antenna
FM wire antenna
A
B
C
Rear connections
The type plate is located at the rear of the
system.
APower
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).
BAntennas 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
For better FM stereo reception, connect an
outdoor FM antenna to the FM AERIAL (FM
ANTENNA) terminal.
C
Speakers Connection
Front Speakers
Connect the speaker wires to the SPEAKERS
terminals, right speaker to "RIGHT" and left
speaker to "LEFT", colored (marked) wire to
"+" and black (unmarked) wire to "-".
Fully insert the stripped portion 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.
Optional connection
The optional equipment and connecting cords
are not supplied. Refer to the operating
instructions of the connected equipment for
details.
Connecting other equipment to your
system
Connect the audio left and right OUT terminals
of a TV,VCR, Laser Disc player, DVD player or
CD Recorder to the AUX terminals.
Note:
– If you are connecting equipment with a mono
output (a single audio out terminal), connect it to
the AUX left terminal. Alternatively, you can use a
“single to double” cinch cable (the output sound still
remain mono).
Before using the remote control
1
Pull out the plastic protective sheet.
2
Select the source you wish to control by
pressing one of the source select keys on the
remote control (for example CD,TUNER).
3
Then select the desired function (for example
,,).
Replacing battery (lithium
CR2025) into the remote control
1
Pull out the knob
A
slightly to the left.
2
Pull out the battery compartment
B
.
3
Replace a new battery and fully insert the
battery compartment back to the original
position.
plastic
protective
sheet
CAUTION!
Batteries contain chemical substances, s o
they should be disposed off properly.
A
C
R
2
0
2
5
L
I
T
H
I
U
M
B

PREPARATIONS AND CONTROLS
1-8
0
!
@
9
3
*
&
^
%
5
4
6
2
#
$
2
3
1
9
6
4
5
7
8
Controls
Controls on the system and
remote control
1
Display
– shows the status of the system.
2
PROG/ REV
for CD/MP3-CD ...... programmes tracks and
reviews the programme.
for TUNER .................. programmes tuner stations
manually or automatically.
for TAPE ........................ sets tape reverse modes
3
CLOCK SET • RDS /
for CLOCK ................. set the clock function.
for CD/MP3-CD ...... starts or interrupts CD
playback
for TAPE ........................ starts the tape playback
for TUNER .................. displays RDS information
4
Mode Selection
VOLUME (-/+)
–adjusts the volume level.
–on the system only - adjusts the hour and minutes
for the clock/ timer functions.
PRESET/ TITLE/ TIMER SET / (on
the remote control ¡/ ™ )
for TUNER .................. selects a preset radio station.
for CD ........................... skips to the beginning of a
current track/previous/ later
track
for MP3-CD ............... to select previous/ next title
for Timer ( only) to set timer under standby
SEARCH/ ALBUM/ TUNE /(on the
remote control 11 / 22)
for TUNER .................. Tune to a station
for CD ........................... to search backward or
forward.
for MP3-CD ............... select previous/ next album.
for TAPE ........................ fast rewind/ wind tape
STOP 9
........................................... stops CD/ MP3-CD
playback or erase a CD
programme.
........................................... stops tape playback/
recording.
REC ......................... starts recording.
5
SOURCE
– selects the respective sound source for CD/
TUNER/ TAPE /AUX.
– switches on the system.
6
DISPLAY-BAND (on the remote control
DISPLAY A/B)
for TUNER .................. change the tuner radio
band.(FM/ MW/ LW)
for CD/MP3-CD...... change the CD display
mode
for TAPE ........................ switches tape direction
7
iR SENSOR
–infrared sensor for remote control.
8
ECO POWER indicator
9
STANDBY ON2
– switches the system to standby.
0
PHONES – connects to headphone.
!
- open/ close the cassette door.
@
CD OPEN
– open the CD door.
#
INTERACTIVE SOUND controls:
DBB .................... (Dynamic Bass Boost) enhances
the bass.
DSC ..................... (Digital Sound Control) selects
sound characteristics: CLASSIC/
JAZZ/ ROCK/ OPTIMAL.
INCREDIBLE SURR.
(IS) ....................... creates a super-enhanced stereo
effect.
$
REPEAT
– repeats a track/ CD programme/ entire CD.
%
SHUFFLE
–plays CD tracks in random order.
^
MUTE
–interrupts and resumes sound reproduction.
&
SLEEP
–activates/deactivates or selects the sleeper time.
*
TIMER ON / OFF
– activates/deactivates the timer function.
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 ,,).

PREPARATIONS AND CONTROLS
1-9
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:
1
Remove fuse cover and fuse.
2
Fix new fuse which should be a BS1362 5 Amp,
A.S.T.A. or BSI approved type.
3
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 earth
terminal in the plug, marked E (or e) or
coloured green (or green and yellow).
Before replacing the plug cover, make certain
that the cord grip is clamped over the sheath
of the lead - not simply over the two wires.
Copyright in the U.K.
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 MC-M350 Philips
risponde alle prescrizioni dell’art. 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.

1-10
TROUBLESHOOTING
Cleaning the Cabinet
Use a soft cloth slightly moistened with a mild
detergent solution. Do not use a solution
containing alcohol, spirits, ammonia or abrasives.
Cleaning Discs
When a disc becomes dirty,
clean it with a cleaning cloth.
Wipe the disc from the centre
out.
Do not use solvents such as
benzene, thinner, commercially
available cleaners, or antistatic
spray intended for analogue records.
Cleaning the disc lens
After prolonged use, dirt or dust may
accumulate at the disc lens.To ensure good
playback quality, clean the disc lens with Philips
CD Lens Cleaner or any commercially available
cleaner. Follow the instructions supplied with
cleaner.
Cleaning the Heads and the Ta pe Paths
To ensure good recording and playback quality,
clean the heads A, the capstan(s) B, and
pressure roller(s) Cafter every 50 hours of
tape operation.
Caution: Do not rotate the heads during
cleaning.
Use a cotton swab slightly moistened with
cleaning fluid or alcohol.
You can also clean the heads by playing a
cleaning tape once.
Demagnetising the heads
Use a demagnetising tape available at your
dealer.
Maintenance
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 center.
Problem Solution
CD OPERATION
“NO DISC”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.
Troubleshooting
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.
“CHECK TAPE”is displayed. – Apply a piece of adhesive tape over the missing
tab space.
The tape deck door cannot open. – Remove and reconnect the AC power plug and
switch on the system again.
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 (,, ).
– Reduce the distance between the remote control
and the system.
–Insert the battery with its polarities
(+/– signs) aligned as indicated.
– Replace the battery.
–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 ON / OFF 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.
Troubleshooting