Philips MCB146 User manual

Version 1.0
MCB146
3141 785 32640
Micro Hi-Fi System
-/05
Published by LX 0815 Service Audio Subject to modification
© Copyright 2008 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
�
Technical specification ..................................................................1-2
Version variation... ........................................................................1-2
Service measurement setup..........................................................1-3
Service aids .................................................................................1-4
Instructions on CD playability ...............................................2-1.. 2-2
Disassembly diagram............ ........................................................3-1
Block diagram................................................................................4-1
Wiring diagram ..............................................................................4-2
Main board
Circuit diagram ..................................................................5-1..5-3
Layout diagram..................................................................5-3..5-4
MCU board
Circuit diagram .........................................................................6-1
Layout diagram.........................................................................6-2
Exploded view diagram .................................................................7-1
Mechanical parts list......................................................................7-2
Electrical parts list...................................................................8-1..8-2

AMPLIFIER
Output power ........................................... 2 x 2W RMS
Signal-to-noise ratio .......................... ≥60 dBA (IEC)
Frequency response ....................... 125 – 16000 Hz
Impedance loudspeakers ........................................... 8Ω
CD PLAYER
Frequency range ............................... 125 – 16000 Hz
Signal-to-noise ratio ............................................ 65 dBA
TUNER
FM wave range ................................... 87.5 – 108 MHz
Sensitivity
– FM 26 dB sensitivity .......................................... 20 µV
Total harmonic distortion..................................... ≤5%
SPEAKERS
Bass reflex system
Dimensions (w x h x d) . 134 x 230 x 152 (mm)
GENERAL INFORMATION
AC Power ..................................... 220 – 230 V / 50 Hz
Dimensions (w x h x d) .. 148 x 233 x 216 (mm)
Weight (with/without speakers) ..................................
......................................................... approx. 3.65 / 1.53 kg
Power consumption
Active .......................................................................... 15 W
Standby .................................................................... < 4 W
Specifications and external appearance are
subject to change without notice.
TECHNICAL SPECIFICATION
1 - 2
Type /Versions:
Features
Board in used:
MCB146
Service policy
DISPLAY BOARD
MAIN BOARD
* TIPS : C -- Component Lever Repair.
M -- Module Lever Repair
√-- Used
/05 /12 /55 89/16/85/
Feature diffrence
RDS & DAB
VOLTAGE SELECTOR
ECO STANDBY - DARK √
Type /Versions:
MCB146
/05 /12 /55 89/16/85/
VERSION VARIATION
39/
39/
C
C
√

1-3
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 met
e
e.g. Sound Technology ST170
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=50:
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=50:
Tuner FM
MEASUREMENT SETUP

1-4
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!
N
Y
Play a CD
for at least 10 minutes
Y
playability
ok ?
N
playability
ok ?
add Info for customer
"SET OK"
check playability
N
Y
playability
ok ?
check playability
check playability
return set
Customer complaint
"CD related problem"
"fast" lens cleaning
1
2
3For flap loaders (= access to CD drive possible)
cleaning method 4is recommended
INSTRUCTIONS ON CD PLAYABILITY
2 - 1
Exchange CDM
1-4For description - see following pages

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.
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
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.
INSTRUCTIONS ON CD PLAYABILITY
2 - 2

DISASSEMBLY DIAGRAM VIEW
3 - 1 3 - 1

SET BLOCK DIAGRAM
4 - 1 4 - 1

MCU
SET WIRING DIAGRAM
4 - 2 4- 2

5 - 15 - 1
CIRCUIT DIAGRAM - MAIN BOARD
CD PART

CIRCUIT DIAGRAM - MAIN BOARD
AMP & POWER SUPPLY PART
5 - 2 5 - 2

CIRCUIT DIAGRAM - MAIN BOARD
TUNER PART
5 - 3 5 - 3

5 - 3 5 - 3
LAYOUT DIAGARM - MAIN BOARD
COMPONENT SIDE VIEW

5 - 4
LAYOUT DIAGARM - MAIN BOARD
COPPER SIDE VIEW
5 - 4

CIRCUIT DIAGRAM - MCU BOARD
6 - 1 6 - 1

LAYOUT DIAGARM - MCU BOARD
6 - 2 6 - 2

EXPLODED VIEW DIAGRAM
7 - 1 7 - 1

7 - 2
MECHANICAL PARTSLIST
81 994000005398 CD MECHANISM DA11B3VF
101 996510013796 LCD BRACKET
102 996510008372 LCD LIGHT GUIDE
114 994000003674 CD DOOR SPRING
201 996510008373 FRONT CABINET
202 996510013802 REAR CABINET
203 996510006656 CD TRAY
204 996510013803 AC CORD BRACKET
205 996510008374 CD DOOR
206 996500039787 LASER COVER (FOR SANYO CD)
207 996510013804 DBB BUTTON COVER
208 996510013807 SOURCE BUTTON COVER
209 996510013808 PLAY BUTTON COVER
210 996510013810 STOP BUTTON COVER
211 996510013805 VOL COSMETI COVER
212 996510013806 VOL BUTTON COVER
213 994000001295 DAMPER GEAR ASS'Y
214 996510013809 PROGRAM/REPEAT BUTTON
215 996510008376 CASS DOOR BOGUS
216 996510006662 POWER BUTTON
217 996510013811 PRESET BUTTON
218 996510013812 DISPLAY LENS
D001 996510013795 LCD DISPLAY
J001 994000004487 16P FFC 1MM L=170MM
J002 996510013800 11P FFC.1.25mm L=100mm
J005 996510013801 FM ANT BALANCE CABLE 1x2+1m
J008 996510006841 15P FFC 1mm L260mm
J011 !996510000859 AC CORD BS APP 2M (to UK)
T001 !996510006839 TRANSFORMER EI48 230V
ACCESSORIES
J012 996510000910 FM ANT SMF-01T-1.3 L=1.1M
M002 996510013799 DAB MODULE VERICE
SPK 996510013798 SPK BOX ASSY (inclu.L&R)
6 996510013797 REMOTE CONTROL
Note: Only these parts mentioned in the list ar
e
normal service parts
.
CORD !996510000909 AC CORD VDE APP 2M (to Switzerland)

ELECTRICAL PARTSLIST
MAIN BOARD ASSEMBL
Y
D2 996510000323 SMD DIODE BAS316
D6 994000003938 RECTIFIER DIODE RL-202
D7 994000003938 RECTIFIER DIODE RL-202
D8 994000003938 RECTIFIER DIODE RL-202
D9 994000003938 RECTIFIER DIODE RL-202
IC1 996510006827 IC (SANYO) LA6541NHL-TE-L-E
IC2 996500039806 IC ET2314 (SOP28)
IC3 996510006828 IC (SANYO) LA9242M-MPB-E
IC4 996510006829 IC (SANYO) LC78602RE-8616
Q1 996510000315 SMD TRANSISTORS BC807-25
Q10 996510010910 TRANSISTOR ST8050C
Q11 994000004145 TRANSISTORS B772Y (160-320)
Q12 996510010292 SMD TRANSISTORS MMBT3904
Q13 996510000315 SMD TRANSISTORS BC807-25
Q14 996510003996 TRANSISTORS KTA1273
Q15 996510010910 TRANSISTOR ST8050C
Q19 996510010910 TRANSISTOR ST8050C
Q2 996510008369 TRANSISTORS MMBT8050D (SOT23)
Q21 996510010292 SMD TRANSISTORS MMBT3904
Q22 994000004145 TRANSISTORS B772Y (160-320)
Q25 996510010292 SMD TRANSISTORS MMBT3904
Q3 996510008369 TRANSISTORS MMBT8050D (SOT23)
Q4 996510008369 TRANSISTORS MMBT8050D (SOT23)
Q5 996510010292 SMD TRANSISTORS MMBT3904
Q5 996510010910 TRANSISTOR ST8050C
Q6 996510000315 SMD TRANSISTORS BC807-25
Q7 996510010292 SMD TRANSISTORS MMBT3904
Q9 994000004145 TRANSISTORS B772Y (160-320)
U101 994000003636 IC D8227 DIP
U2 994000000253 IC (SAMSUNG) KA7808
U201 994000000253 IC (SAMSUNG) KA7808
U202 994000002839 IC LM1117S-3.3
U203 996510013793 IC NCP803SN293T1G
U204 996510013794 IC XC6210A122 1.2V
U33 994000001357 IC LM78L05-AC
X1 994000004551 CRYSTAL 16.9344MHZ +-20PPM
S001 994000003093 CD DOOR SWITCH 1P1T DTS-03
J44 996500042462 FXDIND BEAD 100MHz 80R
CON3 996510005450 SPK JACK PT-22V11A
F1 !994000000586 GLASS FUSE W/LEAD 3.15A/250V
JACK1 994000004369 PHONE JACK TC38-063-05-0
JACK2 996510000889 PHONE JACK TC38-060-01 RING
L2 996500042462 FXDIND BEAD 100MHz 80R
L22 996510000885 CHOKE COIL 47UH W/PLASTIC TUBE
L23 996510000885 CHOKE COIL 47UH W/PLASTIC TUBE
L3 996500042462 FXDIND BEAD 100MHz 80R
8 - 1

ELECTRICAL PARTSLIST
MCU BOARD ASSEMBL
Y
D41 996500042438 LED LAMP 2x5x7mm (WHITE)
RE1 994000004367 OPTIC SENSER FM-6038TM2-5AN
SW1 996500042444 TACT SWITCH 6x6mm 4.3mm
SW10 996500042444 TACT SWITCH 6x6mm 4.3mm
SW11 996500042444 TACT SWITCH 6x6mm 4.3mm
SW12 996500042444 TACT SWITCH 6x6mm 4.3mm
SW13 996500042444 TACT SWITCH 6x6mm 4.3mm
SW2 996500042444 TACT SWITCH 6x6mm 4.3mm
SW3 996500042444 TACT SWITCH 6x6mm 4.3mm
SW4 996500042444 TACT SWITCH 6x6mm 4.3mm
SW5 996500042444 TACT SWITCH 6x6mm 4.3mm
SW6 996500042444 TACT SWITCH 6x6mm 4.3mm
SW7 996500042444 TACT SWITCH 6x6mm 4.3mm
SW8 996500042444 TACT SWITCH 6x6mm 4.3mm
SW9 996500042444 TACT SWITCH 6x6mm 4.3mm
XT1 996500039820 CRYSTAL 10MHz 49/US
XT2 996500042441 X'TAL 32.768KHZ -20PPM
Note: Only these parts mentioned in the list ar
e
normal service parts
.
8 - 2