Philips MCM277 User manual

GB
CLASS 1
LASER PRODUCT
COMPACT
DIGITAL AUDIO
Service
Service
Service
Service
Service
MCM277/05/12/98
©Copyright 2010 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 SL1020 Service Audio Printed in The Netherlands Subject to modification
Micro System
3141 785 32376
Version 1.6
ServiceManual
From week 0913 onwards, ALI solution(decode IC) has been adopted
to replace ROHM solution(decode IC), accordingly new Main Board &
Display/MCU Board & AC Power Board, etc. were used to match with
new solution.
.
Please refer chapter 1 to 9 for sets produced before week 0913 and
chapter 10 & chapter 15 for changed contents for sets produced in or
after week 0913.
Ali solution starting S/N: EF2A0913000001.

1-2
/12 /98
xxxniRDC/nixuA
Line Out
Video Out
Surround Out
Subwoofer Out
Power Booster Out
Digital Out
Digital in
Matrix Surround
xxSDR
xxsweN
Dolby Pro Logic (DPL)
Incredible Surround
Karaoke Features
Voltage Selector
ECO Power Standby (LCD Display Off) x x
USB Direct
Type /Versions: MCM277
Features
in used:
x
/05
x x x x
VERSION VARIATIONS
Type /Versions:
Board in used:
MCM277
Service policy
MAIN BOARD
CD/MCU BOARD
HEADPHONE JACK BOARD
AC POWER BOARD
KEY BOARD
* TIPS : C -- Component Lever Repair.
M -- Module Lever Repair
-- Used
C
M
/05 /12 /55 89/16/85/
Feature diffrence
C
M
DISPLAY BOARD
C
C
C
C
C
C
C
C
C
C
C
C
C
C
TUNER BOARD MMM
x

1-3
SPECIFICATIONS
GENERAL:
Mains voltage : 127/240V -15%+10% Switchable for /98
120V ±10% for /37
230V ±10% for /05/12
Mains frequency : 50/60Hz
Clock accuracy : < 4 seconds per day
Dimension centre unit :194(W)x269(H)x90(D) (mm)
Power consumption
Active : 20W
Standby :< 5.5W (DEMO mode)
ECO Power Standby : < 0.5W for /05/12/37
TUNER:
FM
Tuning range : 87.5-108MHz
Grid : 50kHz for /98/12/05
100kHz for /98/55/37
IF frequency : 10.7MHz ±20kHz
Aerial input : 75 Ωcoaxial /05/12/98
300 Ωfor /37
Sensitivity at 26dB S/N : < 22µf
Selectivity at 300kHz bandwidth : > 25dB
Image rejection : > 25dB [> 75dB]
Distortion at RF=1mV, dev. 75kHz : < 3%
-3dB Limiting point : < 23.5dBf
Crosstalk at RF=1mV, dev. 40kHz : > 18dB
MW
Tuning range : 531-1602kHz for /05/12/55/98
530-1700kHz for /37/98
Grid : 9kHz for /05/12/55/98
10kHz for /37/98
IF frequency : 450kHz ±1kHz
Aerial input : Frame aerial 18.1µH
Sensitivity at 26dB S/N : < 4.4mV/M
Selectivity at 300kHz bandwidth : > 18dB
IF rejection : > 45dB
Image rejection : > 28dB
Distortion at RF=50mV, M=80% : < 5%
AMPLIFIER:
Output power
L & R : 2 x 5.0W (4Ω, 1kHz, 10% THD)
Frequency response within -3dB : 50Hz-16kHz
Digital Sound Control (DSC) : Jazz / Rock / Pop / Classic
Input sensitivity
Aux in (at 1kHz) : 500mV at 600 Ω
Output sensitivity
Headphone output at 32 Ω:10mW ±2dB (Max. vol.)
COMPACT DISC:
Frequency response within ±3dB : 125Hz - 16kHz
Output level (in Vrms) : 500mV, Zout = 100Ω
Signal/Noise ratio (A-weighted) : > 76dB
Distortion at 1kHz : < 0.02%
Channel unbalance (-40dB) : < ±2dB
Channel separation at 1kHz : > 30dB
Emphasis : 15/50 µS (switched
automatically by CD10)
THD Noise(1kHz,500mW) : < 1.0%
[....] Values indicated are for /05/12 only.
MP3-CD Bit Rate : 8-320 kbps
WMA-CD Bit Rate
Sampling Rate : 8, 11.025, 12, 16, 22.05,
24, 32, 44.1, 48 kHz
Format
: 64-192 kbps
: ISO9660, Joliet,UDF
IF rejection : > 60B [> 80dB]
:2x 4.5W (4Ω, 1kHz, 10% THD) /98
:2x 4.5W (FTC Power, 4Ω, 1kHz, 10% THD
63Hz-12.5kHz) /37
Dynamic Bass Boost (DBB) : ON / OFF
USB : Host
Signal/Noise ratio (unw.) : > 65dB
Volume attenuation(1kHz) : > 60dB
ID3 : V1 tag/V2 2.0/V2 3.0
MP3 CD WMA:
MP3 : MPEG 1 (ISO/IEC 11172-3)
Layer3
Language Support : English

1-4
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
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

1-5
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
1-6
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
1-7

1-8
PREPARATIONS AND CONTROLS
Preparation
Setting the clock
After connecting MCM275 to the power supply,
set the clock first.
1
Press and hold STANDBY-ON/ ECO
POWER to switch the set to Standby mode
The display shows the set time
-- --:-- -- flashes by default if you have not set
the clock
2
In the standby mode, press and hold DISPLAY/
CLOCK on the remote control
SET CLOCK scrolls on the display
24 HR or 12 HR appears for the initial
clock setting. To select 24-hour clock or
12-hour clock,
On the remote control, press VOLUME +/-
once or more (or turn VOLUME on the
set)
On the remote control, press DISPLAY/
CLOCK to confirm
The hours digits start flashing
3
Hold down or press VOLUME +/- repeatedly
to set the hours (or turn VOLUME on the
set)
4
Press DISPLAY/CLOCK to confirm
The minutes digits start flashing
5
Hold down or press VOLUME +/- repeatedly
to set the minutes (or turn VOLUME on the
set)
6
Press DISPLAY/CLOCK to confirm
– To exit without storing the clock setting press
STOP 9
Helpful hints:
– The clock setting will be erased when the system
is disconnected from the power supply.
– The set will exit from the clock setting mode if
no button is pressed within 90 seconds.
–To set the clock automatically by using a time
signal which is broadcast together with the RDS
signal see chapter RDS: Automatic clock
setting via RDS.
USB
/
Using the remote control
IMPORTANT!
– Remove the
protective plastic tab
before using the
remote control.
– Always point the
remote control directly
towards IR area.
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
).
To replace the remote controls’
battery
C
R
2
0
2
5
L
I
T
H
I
U
M
2
3
1
CAUTION!
–Remove the battery if it is exhausted
or will not be used for a long time.
–Batteries contain chemical substances,
so they should be disposed of properly.
1
Press and hold 1 as indicated.
2
Simultaneously, pull the battery tray at 4.
3
Remove the old battery and put a new CR2025
battery in place.
4
Put back the battery tray.
1
2
3
!
9
@
0
#
7
6
5
4
8
%
$

1-9
PREPARATIONS AND CONTROLS
Controls
1
STANDBY-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
2
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
3
IR
–sensor for the infrared remote control
Helpful hints: Always point the remote control
towards this sensor.
4
PUSH OPEN
– push to unfold or fold the control panel
5
CD OPEN • CLOSE 0
– opens/closes the CD door
6
CD door
7
VOLUME
–adjusts the volume level
–Clock/Timer: adjusts the hours and minutes
8
nn
nn
n
– 3.5 mm headphone socket
Helpful hints:
– Adjust the volume to a moderate level
before you plug in the headphones.
– Connecting headphones will switch off the
speakers.
9
ALBUM/ 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
–Tu ner : tunes to radio stations
6
–CD/USB: starts or pauses playback
0
DBB (Dynamic Bass Boost)
– turns the bass enhancement on/off
!
DSC (Digital Sound Control)
–selects predefined sound settings: ROCK,
JAZZ, POP, CLASSIC
@
PROGRAM
–CD/USB: programs tracks
– Tuner: programs preset radio stations
#
STOP
–CD/USB: stops playback; erase a program
$
AUX-IN
– connects to the AUDIO OUT jack on the
external appliance
%
– jack for the external USB mass storage device
Remote control
7
8
1
%
$
@
!
9
0
#
2
4
5
6
3
USB
/
AUX
– selects the audio input from an additional
connected appliance
–In standby or Eco Power mode:: switches the
set on and selects the audio input from an
additional connected appliance
3VOLUME +/-
–adjusts the volume level
–Clock/Timer: adjusts the hours and minutes
4TIMER
–displays the timer setting
–switches the timer on/off
–enters the timer setting mode (press and hold
for more than 2 seconds)
5SLEEP
–set the sleep timer
6MUTE
– switches the sound off temporarily
7RDS/NEWS
–Tun er : selects RDS (Radio Data System)
information
–CD/USB/AUX: activates/deactivates news
8SHUFFLE
– selects random playback
9REPEAT
–selects continuous playback
0DSC (Digital Sound Control)
–selects predefined sound settings: ROCK,
JAZZ, POP, CLASSIC
!DBB (Dynamic Bass Boost)
–turns the bass enhancement on/off
@PROGRAM
–CD/USB: programs tracks
–Tu ne r : programs preset radio stations
#DISPLAY/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: switches between clock
display and playback
display
–MP3/WMA files: displays disc information
during playback
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
).
1BB
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)
2Source buttons
USB
–selects USB source
–In standby or Eco Power mode:: switches the
set on and selects USB source.
CD
–selects CD source
–In standby or 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 or Eco Power mode:: switches the
set on and selects TUNER source
Controls

1-10
CONTROLS & INSTALLATIONS
$4 /¢
–CD/USB: skips or searches CD tracks
backwards/forwards
–Tuner: tunes to radio stations
ALBUM/ PRESET 3 /4
–CD/USB: selects the next/previous album (for
MP3/WMA only)
–TUNER: selects a preset radio station
ÉÅ
–CD/USB: starts or pauses playback
9
–CD/USB: stops playback; erase a program
%OPEN • CLOSEç
– opens/closes the CD door
Controls Installation
Placing MCM275
With the detachable stand and by-packed wall
mounting kit , MCM275 allows you to place it in
two ways: on desktops with stand or on
walls without stand.
Mounting stand onto the set
MCM275 is equipped with a stand. To mount
the stand onto the set,
1Put MCM275 on a flat and firm surface, rear side
facing up
2As shown, align the stand to the slots at set’s
bottom, 4 FRONT facing down
PRESS
FRONT
FRONT
PRESS
3Push the stand down into the slots
When the stand is in place, you will hear a
click
See Appendix: How to mount your
MCM275 onto walls to learn more about
wall mounting.
Mounting MCM275 onto walls
Installation
MW loop
antenna
Speaker
(left)
Speaker
(right)
FM wire
antenna
AC power cord
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
1Assemble the loop antenna as shown:

1-11
CONTROLS & INSTALLATIONS
Installation
2
Fit the plug of the loop antenna to AM (MW)
ANTENNA as shown below
3
Adjust the position of the antenna for optimal
reception (as far away as possible from the TV,
VCR or other radiation sources)
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.
1
Extend the wire antenna and fit it to FM
ANTENNA as shown below
AM
ANTENNA
Or
Insert the loop antenna into the slot on the set
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 .
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 device’s stored music through the
powerful speakers of Hi-Fi system.
1
Check you have unfolded the control panel
2
Insert the USB device’s USB plug into the socket
on the set ‘s foldable control panel
2
Move the antenna in different positions for
optimal reception (as far away as possible from
the TV,VCR or other radiation sources)
3
Fix the antenna’s end to the wall
Connecting an additional
appliance
Connecting a USB device or memory
card
or
for the devices with USB cable:
a. Insert one plug of the USB cable (not
supplied) to the socket on the set ‘s
foldable control panel
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 set ‘s foldable control panel
Installation
Using AC power
1
Make sure all the connections have been made
before switching on the power supply
2
Connect the AC power cord to the wall socket.
This switches on the power supply
When MCM275 is switched to standby, it is still
consuming some power. To disconnect the
system from the power supply completely,
remove the power plug from the wall
socket.
The type plate is located on the rear of the
set.
For users in the U.K.: please follow the
instructions.
Warning!
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).
This product complies with the radio
interference requirements of the European
Community.
CAUTION
Visible and invisible laser radiation. If the
cover is open, do not look at the beam.
High voltage! Do not open.You run the risk
of getting an electric shock.
The machine does not contain any user-
serviceable parts.
Modification of the product could result in
hazardous radiation of EMC or other
unsafe operation.
4
Select AUX mode on the set
Helpful hints:
–Always refer to the owner’s manual of other
equipment for complete connection.
Connecting a non-USB device
It is possible to use an additional appliance, e.g.
TV,VCR or CD recorder with the set. On
MCM275, you can playback music from an
external source.
1
Follow the Step 1 under Connecting a USB
device or memory card
2
Insert one plug of the audio cable (not supplied)
to the socket AUX IN on the set ‘s foldable
control panel
3
Connect the other end of the audio cable to the
AUDIO OUT terminal of the additional
appliance

English
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 Philips for
help.
“NO DISC” is displayed.
Some files on the USB device are not
displayed.
Radio reception is poor.
The system does not react when buttons
are pressed.
Sound cannot be heard or is of poor
quality.
The left and right sound outputs are
reversed.
Problem Solution
Insert a disc.
Wait until the moisture condensation at the lens
has cleared.
Replace or clean the disc, see “Maintenance”.
Use a finalised CD-RW or a correct MP3/WMA
-CD format disc.
Check if the number of folders exceeds 99 or
the number of titles exceeds 999
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 yourTV or VCR.
Remove and reconnect the AC power plug and
switch on the system again.
Adjust the volume.
Disconnect the headphones.
Check that the speakers are connected correctly.
Check if the stripped speaker wire is clamped.
Make sure the MP3-CD was recorded within
32~256 kbps bit rate with sampling frequencies
at 48 kHz, 44.1 kHz or 32 kHz.
Check the speaker connections and location.
The remote control does not function
properly.
The timer is not working.
The Clock/Timer setting is erased.
Select the source (CD or TUNER, for example)
before pressing the function button (ÉÅ,í,
ë).
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.
Check the set is switched off
Set the clock correctly.
Press TIMER to switch on the timer.
Power has been interrupted or the power cord
has been disconnected. Reset the clock/timer.
Troubleshooting
1-12
TROUBLESHOOTING

2-1 2-1
DISMANTLING INSTRUCTIONS
1) Press the 2 juts and pull out the Stand as shown in figure
1.
2) Loosen 5 screws A and 6 screws B to remove the Rear
Cabinet as shown in figure 2.
3) Loosen 3 screws C to remove the SP & ANT Jack Board
as shown in figure 3.
4) Loosen 5 screws D to remove the Power Module as
shown in figure 3.
Dismantling the Rear Portion and PCBs
Figure 3
Figure 2
Dismantling the Rear Portion and PCBs
5) Loosen 2 screws E to remove the Bracket Jack Board as
shown in Figure 4.
6) Loosen 3 screws F to remove the Main Board as shown
in figure 5.
Figure 4
Figure 5
Figure 1
Dismantling of the Display Lens & the Volume knob
1) Use a flat head screw driver to give a push in the direction
as shown in figure 6.
Figure 6
2) Place two small screw drivers in between the front cabinet
& knob to give more leverage in pulling out the Volume
Knob as shown in figure 7.
Figure 7

2-2 2-2
Service pos A
Note: After re-assembly, it is very important to ensure all
wires are routed properly to ensure that they do not
touch/obstruct all moving parts.
Dismantling of the CD Module & CD Door Carrier
1) Loosen 5 screws J mounting the Key Board to the Front
Cabinet to remove the Key Board as shown in figure 8.
2) Loosen 4 screws H and 3 screws G to CD Module as
shown in figure 8.
3) Loosen 2 screws I to remove the Servo Motor Mechanism
as shown in figure 8.
Figure 8
4) Loosen 4 screws K to remove the Right CD Door Carrier
and 4 screws L to remove the Left CD Door Carrier as
shown in figure 9.
Figure 9
Service pos B

3-1 3-1
SERVICE TEST PROGRAM
Various
other Tests
Activated with
ACTION
TEST
Disconnect
mains cord
LEAVE SERVICE
TEST PROGRAM
9 to Exit
EEPROM CLEAR A test pattern will be sent to the EEPROM.
"EEP CLR" is displayed while the erase processing.
Caution! All presets from the customer will be lost!!
Y
N
Y
N
N
PREV
Button pressed?
PREV
Button pressed?
PREV
Button pressed?
DISPLAY
TEST
Display shows Figure 1
All display flags on.
Display shows alternate
segment display from SEG0
to SEG64.
Y
Y
N
9
Button pressed?
No Display shows
Y
N
Y
N
N
DBB
Button pressed?
DBB
Button pressed?
DBB
Button pressed?
ADC
TEST
Display shows "ADC1 Value"
for ADC1
Display shows "ADC2 Value"
for ADC2
Y
Y
N
9
Button pressed?
ADC Test is used for checking the
ADC inputs to the microprocessor.
The display shows an ADC value
between 0 and 255 for an input
signal between 0 and 5V.
Display shows "ADC3 Value"
for ADC3
(Input Line - Door switch status)
Y
Y
N
N
Display shows
Table 1
KEY
TEST
Button pressed?
9
Button pressed?
Display shows the
MCU version
"MCU-Vyy"
(Main menu)
V refers to Version
yy refers to Software version number of the uProcessor
(counting up from 01 to 99)
To enter Service
Testprogram hold
PLAY & Door Open/Close
buttons depressed while
plugging mainscord in.
*Door switch is ignored →CD door can be opened.
(Input Line - Rotary volume)
(Input Line - ioNTC Heat
detection for transformer)
Y
N
DBB
Button pressed?
Display shows "ADC0 Value"
for ADC0
(Input Line - For key scanning)
N
DBB
Button pressed?
Y
Display shows "ADC4 Value"
for ADC4
(Input Line - Version detection)
Figure 1
PROGRAM
NEXT
Key test table
KeyNr Setkey KeyNr Setkey KeyNr Set key
0 CD 10 RDS 20 PROGRAM
1 AUX 11
21 SHUFFLE
2 TUNER 12 CLOCK/DISPLAY 22 NULL
3 SOURCE 13 ALBUM + SLEEP
4 STANDBY/ON 14 ALBUM - TIMER
5 OPEN/CLOSE 15 SKIP PREV 25 DBB
6 VOLUME DOWN 16 SKIP NEXT 26 DSC
7 VOLUME UP 17 NULL 27 MUTE
8 NULL 18 NULL 28 USB
9 NULL 19 REPEAT
23
24
Table 1

4-1 4-1
SET BLOCK DIAGRAM
DAYANG M93BGP-BF
IC302
W27C512-45Z
IC103
UR11
IC300
468D
IC601
IC301 AP34063A
IC100 IC501
IC102
IC401
IC801
IC701
BR24L02F-WE2
IC504
BR24L02F-WE2
IC104
CF91D
E01J

5-1 5-1
SET WIRING DIAGRAM

6-1 6-1
MAIN BOARD
TABLE OF CONTENTS
Internal IC Diagram ............................................... 6-1 to 6-5
Main Board(5757) Layout Top View ................................ 6-6
Main Board(5757) Layout Bottom View .......................... 6-7
Circuit Diagram - Main Board(5757) ............................... 6-8
Main Board(5762) Layout Top View ................................ 6-9
Main Board(5762) Layout Bottom View ........................ 6-10
Circuit Diagram - Main Board(5762) ............................. 6-11
HP Jack Board ............................................................... 6-12
Electrical Parts List ........................................................ 6-13
BLOCK DIAGRAM - RDS/RBDS PRE-PROCESSOR
SAA6588T
BLOCK DIAGRAM
MGK535
10 k"
10 k"
470
k"
57 kHz
8th ORDER
BAND-PASS
PAUSE
DETECTOR
MULTI-PATH
DETECTOR
CLOCKED
COMPARATOR
SIGNAL QUALITY
DETECTOR
RDS/RDBS
DEMODULATOR
INTERFACE
REGISTER
POWER
SUPPLY
AND RESET
TEST
CONTROL
C10
C9 100 nF
DAVN data
available pause output
multi-path output
8
71918
11
2
9
10
VNICTUOCS DDD
560 pF
OSCILLATOR
AND CLOCK
I2C-BUS SLAVE
TRANSCEIVER I2C-BUS
RDS/RDBS
DECODER
multiplex
input
audio
inputs
level
input
4
4
SAA6588
TCON MRO
100
nF
C6
100 nF
C8
C11
C2 C3
20
14 13 16
R3
R2
2.2 nF
330 pF
LVIN
VDDA
AFIN
MPX
C7 2.2 嘕F
0.47 嘕F 0.47 嘕F
C1
31
OSCI
5
Q1
nh4.332
MHz
n = 1 to 4
OSCO
4
R1
C5 82 pF
C4
47 pF
1 k"
MAD
12
VSSD
6
R4
Vref
VSSA
1715
5
5 V
5 V
PSWN MPTH SDA SCL

BLOCK DIAGRAM - POWER AMPLIFIER
TDA1517
6-2 6-2
PINNING
SYMBOL PIN DESCRIPTION
MRO 1 mXOWLSDWKUHFWL¿HURXWSXW
MPTH 2 mXOWLSDWKGHWHFWRURXWSXW
TCON 3 WHVWFRQWUROLQSXWSLQ
OSCO 4 RVFLOODWRURXWSXW
OSCI 5 RVFLOODWRULQSXW
VSSD 6digital gURXQG0V)
VDDD 7digital supply vROWDJH5V)
DAVN 8 data availabOHRXWSXWDFWLve LOW)
SDA 9 I2C-bus serial data I/O
SCL 10 I2C-bus serLDOFORcNLQSXW
PSWN 11 pause sZLWFKRXWSXWDFWLve LOW)
MAD 12 slavHDGGUHVV/6%LQSXW
AFIN 13 DXGLRVLJQDOLQSXW
VDDA 14 DQDORJVXSSO\vROWDJH5V)
VSSA 15 DQDORJgURXQG0V)
MPX 16 multiple[LQSXWVLJQDO
Vref 17 refHUHQFHvROWDJHRXWSXW
SCOUT 18 EDQGSDVV¿OWHURXWSXW
CIN 19 FRPSDrDWRULQSXW
LVI N 20 l evHOLQSXW
SYMBOL PIN DESCRIPTION
MRO
MPTH
TCON
OSCO
OSCI
VSSD
VDDD
SDA
SCL
LVIN
CIN
SCOUT
Vref
VSSA
VDDA
MPX
AFIN
MAD
1
2
3
4
5
6
7
8
9
10 11
12
20
19
18
17
16
15
14
13
MGK534
DAVN
PSWN
SAA6588T
PIN DESCRIPTION - RDS/RBDS PRE-PROCESSOR
SAA6588T
BLOCK DIAGRAM
mute/stand-by
switch input
MLC351
output 1
15 k
15 k
x 1
VA
stand-by
switch
VP
mute
switch
stand-by
reference
voltage
18 k
18 k
2
k
60
k
mute switch Cm
power stage
4
8
mute switch
VA
VA
Cm
2
k
60
k
power stage
6
275
SGND
signal
ground
PGND
output 2
non-inverting
input 1
non-inverting
input 2 9
supply voltage
ripple rejection
output
3
1
TDA1517
mute
reference
voltage
input
reference
voltage
VP
power
ground
(substrate)

6-3 6-3
PINNING
NOITPIRCSEDNIPLOBMYS
"1tupnignitrevni-non11VNI
dnuorglangis2DNGS
tuptuonoitcejerelppiregatlovylppus3RRVS
1tuptuo41TUO
dnuorgrewop5DNGP
2tuptuo62TUO
VP7supply voltage
tupnihctiwsybdnats/etum8SS/M
"2tupnignitrevni-non92VNI
Pin configuration for SOT110-1 and
SOT352-1.
handbook, halfpage
MLC352
1
2
3
4
5
6
7
8
9
P
V
OUT2
SGND
INV1
INV2
TDA1517
OUT1
M/SS
SVRR
PGND
PIN DESCRIPTION - POWER AMPLIFIER
TDA1517
.This text is here in
BLOCK DIAGRAM
PRESCALER
PROGRAMMABLE
COUNTER
STABILIZER
WINDOW
DETECTOR
LAST-STATION
MEMORY
AM/FM
INDICATOR
IN-LOCK
DETECTOR
FM
DETECTOR
PILOT
DETECTOR
CHARGE
PUMP
MULTIPLEXER
CRYSTAL
OSCILLATOR
SHIFT REGISTER
FM
FRONT-END
FM
OSCILLATOR
FM IF2
FM IF1
FM
MIXER
SEQUENTIAL
CIRCUIT
STATUS
REGISTER
AM
FRONT-END
AM
OSCILLATOR
AM
DETECTOR
V/I
CONVERTER
AM
MIXER
AM
IF AGC
AFC
hard mute level
PLL
DECODER
MATRIX
SDS
MUTE
up
down level
RFGND
DATA
BUS-CLOCK
WRITE-ENABLE
FM-RFI
VSTAB(A)
VSTAB(B)
AM-RFI
XTAL
RIPPLE
25
23
1 26 30 31
2
AGC
AM-IFI/O2
AM-MIXERAMOSC
AM-IFI1
640 41 36 44 822
32 20 19 13 15 14
9
12 24 16
181739 37 333535
38
43 42 28 27 29
34
7
21
10 11 4
MO/ST
AFRO MUTE
AFC(n) AFC(p) AFC
VCO LFI PILFIL
AFLO
stereo
stereo
mono
38 kHz 19 kHz
FM-IFI1 FM-IFI2
FM-IFO1
FM-MIXER
FMOSC
FM-RFO
VCC1
VDDD
TEA5757;
TEA5759
FM
AM
DGND
P1 P0
TUNE RFGND
MPXI
AFO
VCC2
IFGND FSIFMDEM
MHA111
BLOCK DIAGRAM - SELF TUNED RADIO
TEA5757