Philips MCM279 User manual

MCM279
Service AIDS & CD playability ...........................1-1...1-4
Specifications ................................................................2
Connection & Controls ...................................................3
Disassembly Instructions ...............................................4
Block & Wiring diagrams ................................................5
MAIN BOARD ................................................................6
KEY & USB JACK BOARD ............................................7
POWER & AMP BOARD ................................................8
EXPLODE DIAGRAM .....................................................9
SERVICE PARTLIST ....................................................10
FACTORY PARTLIST ...................................................11
3141 785 32152
2

1-1
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
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
SERVICE AIDS
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.
ESD
CLASS 1
LASER PRODUCT
GB
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 !.
Lead free

Set remains closed!
Standard repair procedure
N
Y
Play a CD
for at least 10 minutes
Y
playability
ok ?
N
playability
ok ?
add Info for customer
"SET OK"
playability
ok ?
Y
N
check playability
N
Y
playability
ok ?
check playability
check playability
EYE-Pattern
ok ?
N
Y
check "EYE-Pattern"
replace CD Drive
Laser current
ok ?
N
Y
check Laser current
CD Drive offsets
ok ?
N
Y
check CD Drive offsets
clean the lens
check playability
return set
Customer complaint
"CD related problem"
return set
return set
replace CD Drive
return set
replace CD Drive
return set
replace Signal Processor
return set
"fast" lens cleaning
1
2
3
4
5
6
7
For flap loaders (= access to CD drive possible)
cleaning method 4is recommended
1- 7For description - see following pages
CD PLAYABILITY CHECK
1-2

1
PLAYABILITY CHECK
For sets which are compatible with CD-RW discs
use CD-RW Printed Audio Disc....................7104 099 96611
TR 3 (Fingerprint)
TR 8 (600µ Black dot) maximum at 01:00
• playback of these two tracks without audible disturbance
playing time for: Fingerprint ≥10seconds
Black dot from 00:50 to 01:10
• jump forward/backward (search) within a reasonable time
For all other sets
use CD-DA SBC 444A..................................4822 397 30245
TR 14 (600µ Black dot) maximum at 01:15
TR 19 (Fingerprint)
TR 10 (1000µ wedge)
• playback of all these tracks without audible disturbance
playing time for: 1000µ wedge ≥10seconds
Fingerprint ≥10seconds
Black dot from 01:05 to 01:25
• jump forward/backward (search) within a reasonable time
2
CUSTOMER INFORMATION
It is proposed to add an addendum sheet to the set which
informs the customer that the set has been checked
carefully - but no fault was found.
The problem was obviously caused by a scratched, dirty or
copy-protected CD. In case problems remain, the customer
is requested to contact the workshop directly.
The lens cleaning (method 3) should be mentioned in the
addendum sheet.
The final wording in national language as well as the printing
is under responsibility of the Regional Service Organizations.
3
FAST LENS CLEANING (dry brush)
Use lens cleaning CD
SBC AC300...........................................9082 100 00043
Insert the lens cleaning CD, press PLAY and follow the
voice guide´s instructions on the CD.
4
LIQUID LENS CLEANING
Because the material of the lens is synthetic and coated
with a special anti-reflectivity layer, cleaning must be done
with a non-aggressive cleaning fluid. It is advised to use
“Cleaning Solvent B4-No2”, available with codenumber
4822 389 10026.
The actuator is a very precise mechanical component and
may not be damaged in order to guarantee its full function.
Clean the lens gently (don’t press too hard) with a soft and
clean cotton bud moistened with the special lens cleaner.
The direction of cleaning must be in the way as indicated in
the picture below.
Before touching the lens it is advised to clean the
surface of the lens by blowing clean air over it.
This to avoid that little particles make scratches on
the lens.
CD PLAYABILITY CHECK
1-3

5
EYE-PATTERN SIGNAL – JITTER MEASUREMENT
Measure the signal on the input of the Signal processor
using an analog oscilloscope. Please find the exact
measuring point in your Service Manual.
See below examples of the signal. Amplitude should read at
least 700mVpp using SBC444A.
good
bad
If the oscilloscope shows a signal like the ‘bad’ one, and/or
the amplitude decreases within 1 minute - the CD drive has
to be replaced.
6
CD DRIVE – LASER CURRENT MEASUREMENT
The laser current can be measured as a voltage drop on a
resistor. The resistor is marked in every Service Manual.
The value depends on the type of CD drive.
typical value most probably defect
VAMxxxx : 150-230mV ≥350mV
MCDxx : 170-230mV ≥300mV
DA1x : 210-250mV ≥350mV
DA2x : 175-200mV ≥250mV
Use SBC444A (CD-DA) for measurement.
7
CD DRIVE – OFFSET MEASUREMENT
The photodiodes of the CD-drive may have an offset. These
offsets have to be compensated by the signal processor.
High offsets can lead to poor playability of some CDs
(skipping tracks).
To measure the offset values, start the Service Test
Program - section “Focus Test” without a CD.
The offsets can be measured with a DC Millivoltmeter
directly on the connector (see drawing below). Pin
numbering varies from drive to drive.
The values from diode A-D should read 0±10mV.
Diodes E and F are less critical.
If one of the offsets is higher than ±10mV the CD drive has
to be replaced. Otherwise replace the Signal Processor.
Sanyo DA12T3
CD Drive
A
A
F
C
B
E
C
D
E
VCC
B
VREF
F
D
9
10
11
12
13
14
15
16
1800
+5V_HF
VrefCD10
A
D
E
B
C
F
GND 8
E
D
A
B
C
F
Laser power control
100n
2878
470n
2876
3821
1R
1K
3823
2880
33p
+5V
BC807-40
7879
3817
47R
3820
4R7
47R
3819
1n
2879
2877
47u
1
8
4
7811-A
LM358D 3
2
10K
3822
47R
3818
2841
100n
47n
2869
+5V_HF
LASER DIODE
U >250mV
->Laser damaged !
4,6V
3V
3,3V
3,9V
2V
0,17V
0,17V
Sanyo
DA12T3
HF-Amplifier
D3
D2
D1
Drive detection
680R
3905
3903
3K3
BC847B
7877
47n
2818
1K5
3902
5
7
4
2
1
6
3
64
8
9
10
11
470R
3893
+3.3V
2K2
3908
10K
3923
BC847B
7878
BC847B
7876 4n7
2813
3896
100R
220u
2885
2881
560p
47n
2887
560R
3901
2883
470n
2817
4u7
3n3
2814
3898
220R
3895
27K
470n 2884
+3.3V
3909
820R
3907
100R
3920
33K
3897
2882
82p
3K3
3904
2K7
3899
3906
470R
+5V_HF
HFIN
VrefCD10
100p
2815
2816
22n
LDON
to 3826,3827
VREF GE
VDDA1
VRIN
VSSA1
ISLICE
LDON
D1
D2
D3
D4
HFIN
HFREF
IREF
CD_DA: 0V / CD_RW: 3V
Σ(A-D)
800mVpp
TB = 0.5µs/div
EYE-PATTERN
1,8V
1,2V
2,4V
2,6V
0,65V
CD PLAYABILITY CHECK
1-4

2 - 1
AMPLIFIER
Output power ................................................ 30 W RMS
Signal-to-noise ratio ....................................... ≥65 dBA
Frequency response ............. 100 – 18kHz, ± 3 dB
Input sensitivity AUX ....................... 0.5 V (max. 1 V)
Impedance loudspeakers ..................................... ≥6 Ω
Impedance headphones .................... 32 Ω-1000 Ω
..................................................................................... <15mW
CD PLAYER
Frequency range ....................................... 100 – 18kHz
Signal-to-noise ratio ............................................ 65 dBA
TUNER
FM wave range ................................... 87.5 – 108 MHz
MW wave range ................................ 531 – 1602 kHz
Number of presets ........................................................ 40
Antenna
FM .................................................................... 75 Ωwire
MW ......................................................... Loop antenna
SPEAKERS
Bass reflex system
Dimensions (w x h x d) .. 158 x 250x 185 (mm)
GENERAL INFORMATION
AC Power .......................... 110 – 240V, 50 Hz/60Hz
Dimensions (w x h x d, with/without the stand)
............... 211 x 250 x 160/211 x 250 x 126 (mm)
Weight(with/without speakers) ......... 3.7 / 1.33 kg
Standby power consumption ............................<2 W
Eco power standby ............................................... <1 W
Specifications and external appearance are
subject to change without notice.
USB ......................................................................... V2.0/ V1.1
......................................... support MP3 and WMA files
Number of albums/ folders ................ maximum 99
Number of tracks/titles ...................... maximum 999
USB PLAYER

Connection
Connection
3 - 1
CONNECTION AND CONTROLS
Rear connections
Warning: –Never make or change connections with the mains supply switched on. –Install your set near the AC outlet and where the AC power plug can be reached easily.
ASpeaker connections
Use the supplied speakers only. Using other speakers can damage the set or the sound quality will be negatively affected.
●Connect the cable of the left speaker to LEFT
(red and black) and the cable of the right speaker to RIGHT (red and black) as follows: a. Press the clip of the red terminal and fully insert the stripped portion of the colored (or marked) speaker cable into the socket, then release the clip b. Press the clip of the black terminal and fully insert the stripped portion of the black (or unmarked) speaker cable into the socket, then release the clip
BAntenna connections
MW antenna Connect the supplied MW loop antenna to the “AM aerial” terminal. Adjust the position of the antenna for optimal reception.
6
9
FM antenna The wire antenna supplied can only be used to receive nearby stations. For better reception we recommend using a cable antenna system or an outdoor antenna.
1Extend the wire antenna and fit it to FM
ANTENNA as shown below
Note: If you are using a cable antenna system or an outdoor antenna, fit the antenna plug, instead of the wire antenna, to FM ANTENNA .
2Move the antenna in different positions for
optimal reception (as far away as possible from the TV,VCR or other radiation sources)
3Fix the antenna’s end to the wall.
Helpful hints: –To receive optimal radio reception, put the main unit and the antennas as far away as possible from the power adaptor.
Connecting an additional appliance
Connecting a USB device or memory card
By connecting a USB mass storage device (including USB flash memory, USB flash players or memory cards) to the Hi-Fi system, you can enjoy the music stored on the external device through the powerful speakers of Hi-Fi system.
1Insert the USB device’s USB plug into the socket
on the front panel of the main set.
Or, for the devices with USB cable: a. Insert one plug of the USB cable (not supplied) to the socket on the front
panel of the main set. b. Insert the other plug of the USB cable to the USB output terminal of the USB device. Or,
for the memory card:
a. Insert the memory card into a card reader (not supplied). b. Use a USB cable (not supplied) to connect the card reader to the socket .
on the front panel of the main set.
Connecting a non-USB device
It is possible to use an additional appliance, e.g. TV,VCR or CD recorder with the set. On MCM279, you can playback music from an external source.
1Insert one plug of the audio cable (not supplied)
to the socket AUX IN at the rear panel of the
main set.
2Connect the other end of the audio cable to the
AUDIO OUT terminal of the additional appliance.
3Select AUX mode on the set.
Helpful hints: –Always refer to the owner’s manual of other
equipment for complete connection.
●Position the antenna as far as possible from a TV,
VCR or other radiation source.

3 - 2
CONNECTION AND CONTROLS
Controls
Controls
4mm
MICRO SYSTEM MCM279
WMA-MP3-CD/CD-R/CD-RW CO MPATIBLE
VOLUMEPROGRAM
DISPLAY/CLOCK
ALBUM/PRESET
SOURCE STOP
DSC
DBB
STANDBY-ON
ECO POWER
OPEN/CLOSE
IR
3
4
5
2
1
6
8
7
9
0
!
@
Controls on the set (illustrations
on page 3)
1
– jack for the external USB mass storage device
2PROGRAM
–CD/USB: programs tracks – Tuner: programs preset radio stations
3VOLUME
–adjusts the volume level –Clock/Timer: adjusts the hours and minutes
4DISPLAY/CLOCK
–Clock:
- displays the set time
- In standby mode: enters the clock setting mode
(press and hold for more than 2 seconds)
–TUNER/Audio CD/AUX: switches between
clock display and playback display
–MP3/WMA files: displays disc information
during playback
5ALBUM/ PRESET + /-
–CD/USB: selects albums (for MP3/WMA only) –TUNER: selects a preset radio station
4 /¢
–CD/USB: skips or searches CD tracks/titles
backwards/forwards
–Tuner: tunes to radio stations
ÉÅ
–CD/USB: starts or pauses playback
6IR
– sensor for the infrared remote control Helpful hints: Always point the remote control
towards this sensor.
7DSC (Digital Sound Control)
–selects predefined sound settings: ROCK,
JAZZ, POP, CLASSIC, OFF
8STANDBY-ON/ ECO POWER
– press briefly to switch the set on or off (standby/
ECO POWER);
–In standby or Eco Power mode: press and
hold to toggle between Standby and ECO POWER mode (power-saving mode)
–Red indicator: lights up red when the set is
switched to ECO POWER mode
9OPEN/CLOSE 0
–opens/closes the CD door.
0DBB (Dynamic Bass Boost)
–turns the bass enhancement on/off
!SOURCE
–selects sound source CD, USB,TUNER, or
AUX
–In standby or Eco Power mode: switches the
set on and selects sound source CD, USB, TUNER or AUX
@STOP
–CD/USB: stops playback; erase a program

Controls Controls
3 - 3
CONNECTION AND CONTROLS
Remote control AUX
–selects the audio input from an additional
connected appliance
–In standby/Eco-power mode: switches the set
on and selects the audio input from an additional connected appliance
3SLEEP
–set the sleep timer
4MUTE
– switches the sound off temporarily
5à/ á
–CD/USB: skips or searches CD tracks
backwards/forwards
–Tuner: tunes to radio stations
3 /4
–CD/USB: selects the next/previous album (for
MP3/WMA only)
–Tuner: selects a preset station
ÉÅ
–CD/USB: starts or pauses playback.
6USB DEL
–deletes one file or all files stored on the external
USB device.
7VOL +/-
–adjusts the volume level –Clock/Timer: adjusts the hours and minutes
8REPEAT
–selects continuous playback
9SHUFFLE
–selects random playback
0PROG
–CD/USB: programs tracks – Tuner: programs preset radio stations
!RDS/NEWS
– Tuner: selects RDS (Radio Data System)
information
– CD/USB/AUX: activates/deactivates news
@TIMER
– enters the timer setting mode (press and hold
for more than 2 seconds)
#CLOCK
–Clock: - displays the set time
- In standby mode: enters the clock
setting mode (press and hold for more than 2 seconds)
–TUNER/Audio CD/AUX: switches between
clock display and playback display
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
ÉÅ
,
í
,
ë
).
B
B
BB
B press briefly to switch the set on or off (standby/
ECO POWER); In standby or Eco Power mode: press and hold to toggle between Standby and ECO POWER mode (power-saving mode) Source buttons
USB selects USB source
In standby/Eco-power mode: switches the set
on and selects USB source. CD selects CD source
In standby/Eco-power mode: switches the set
on and selects CD source.
TUNER selects TUNER source and toggles between the wavebands: FM and MW In standby/Eco-power mode: switches the set
on and selects TUNER source
1 2 3 4$
@ # ^ (
5
6 7 8 9 0 !
*
) ¡
%
™
&
$DISPLAY
–MP3/WMA files: displays disc information
during playback
%TIMER ON/OFF
–switches the timer on/off
^USB REC
–USB: copies one file or all files of a disc to an
external portable USB storage device/MP3 player.
&0
–opens/closes the CD door.
*í/
ë
–CD/USB: selects previous/next track
(9
–CD/USB: stops playback; erase a program
)Numeric keypad (0-9)
–selects track or station number
¡DSC (Digital Sound Control)
–selects predefined sound settings: ROCK,
JAZZ, POP, CLASSIC, OFF
™DBB (Dynamic Bass Boost)
–turns the bass enhancement on/off
Placing MCM279
MCM279 is supplied with a stand, you may attach or detach the stand to/from the main set.
Mounting the stand onto the set
1Locate the bottom of the main unit and find the
slot, then slide the stand in the slot until it stops, as indicated in the figure below.

4 - 1 4 - 1
DISASSEMBLY DIADRAMS
A. Remove stand
Rlease click and pull it out.
B. Remove Top Cabinet
Remove screws MP 3x10 - 6 pcs.
C. Remove Amplif ier board
C1: Remove screws 2 pcs.
C2: Remove screws 2 pcs.
C1
C1
D. Remove Main board
D1:Remove screws MP 3x10 - 3 pcs.
D2:Remove screws MP 3x10 - 3 pcs.
E. Remove Key board
E 1:Remove screws MP 2x8 - 8 pcs.
D2
D1
Then remove lens frame cosmetic top_right&left
Then remove lens frame cosmetic botom_right&left
E1
C2 C2
E1

5 - 1
5 - 1
SET BLOCK DIAGRAM

5 - 2 5 - 2
SET WIRING DIAGRAM

CIRCUIT DIAGRAM - MAIN BOARD - PART1
6-1 6-1

6 - 2 6 - 2
CIRCUIT DIAGRAM - MAIN BOARD - PART2

6 - 3
6 - 3
LAYOUT DIAGRAM - MAIN BOARD

7 - 1 7 - 1
KEY & USB JACK BOARD

8 - 1 8 - 1
CIRCUIT DIAGRAM -POWER & AMP BOARD

8 - 2
8 - 2
LAYOUT DIAGRAM - POWER & AMP BOARD

EXPLODE DIAGRAM
9-1 9-1

10-1
ACCESSORY PARTS
! 9940 000 02082
A
C CORD VDE 2C L=1.5M
! 9965 100 10439
A
C CORD VDE 1.83M (2.5A 250V) (only for /55)
9965 100 00308 FM ANT WIRE 75R L1.0M
! 9965 100 07794 SWITCHING POWER ADAPTOR 19V/4A
! 9965 100 10440
A
C ADAPTOR MCM279/55 19V/3.4A (only for /55)
9965 100 00134
A
M LOOP ANT 18.1uH 8
T
9965 100 07795 SPEAKER BOX FOR MCM279//00(for /55)
9965 100 10123 SPEAKER BOX FOR MCM279(for /12)
9965 100 07796 RC "PHILIPS" FOR MCM279
9965 100 07001 STAND PORTION OF MCM238/1
2
99651 000 0132 CONVERSION MAINS PLUG ADAPTOR (for /55)
ME
C
HNI
C
AL
&
MI
SC
ELLANE
O
U
S
PART
S
12 99651 000 9789 CABINET FRONT V1
2 9965 100 07777 LENS-SLIDE DOOR
71 9965 100 07778 CABINET REA
R
5 9965 100 07798 CARRIER - SLIDE DOOR -R
7 9965 100 07779 CARRIER - SLIDE DOOR -L
32 9965 100 07780 RACK BAR
13 9965 100 07781 LENS-CD AMBI LIGHT GUIDE
16 9965 100 06985 BUTTON POWER
47 9965 100 17133 BUTTON SET FUNCTION-A (W/OPEN)(/12)
51 9965 100 06983 BUTTON SET FUNCTION-
B
52 9965 100 06980 BRACKET PLAY BUTTON
50 99651 001 0192 BUTTON SET-NAVIGATION V1
14 9965 100 06981 COVER POWER BUTTON
6 99651 000 9788 DOOR CD - SLIDE V1
44 99651 000 9790 DOOR CD - ROTATED V1
17 9965 100 07784 GEAR-ROTATED DOOR RAC
K
19 9965 100 07785 GEAR-SLIDE DOO
R
46 9965 100 07786 CONTROL PANEL (for /12)
46 9965 100 07950 CONTROL PANEL (for /55)
1 9965 100 07787 COVER- ROTATED CD DOOR(for /12)
1 9965 100 07951 COVER- ROTATED CD DOOR (for /55)
4 9965 100 07788 FRAME-LCD CHROME
48 9965 100 06991 COVER PLAY BUTTON(for /12)
48 9940 000 04315 COVER PLAY BUTTON(for /55)
49 9965 100 06992 COVER NAVIGATION BUTTON(for /12
)
49 9940 000 04309 BUTTON FW/FF (for /55)
23 9940 000 04317 GEAR WHEEL A
22 9940 000 04318 GEAR WHEEL B
28 9940 000 04316 PULLEY SERVO MOTO
R
15 9965 100 07789 CUSHION CD MECHANISM
A
64 9940 000 04323 CD DAMPER (BLACK) 20DEG
65 9965 100 07790 CD DAMPER (BLACK) 30DEGREE
74 9965 100 07791 RUBBER FOOT FOR FRAME-COSMETI
C
18 9965 100 07792 SHAFT FOR MCM279
24 9940 000 04325 BELT MOTO
R