Philips AJ-3980 Service manual
CD Clock Radio
AJ 3980
all versions
Handling Chip Components and Safety ..........................1 - 1
Technical Specification & Service tools...........................2 - 1
Service Measurement......................................................2 - 2
Connections and controls.......................................3 - 1..3 - 3
Instructions for use .................................................3 - 4..3 - 5
Disassembly Diagram......................................................4 - 1
Block Diagram .................................................................5 - 1
Wiring Diagram................................................................6 - 1
Tuner Board
Circuit diagram ..........................................................7 - 1
Layout diagram ..........................................................7 - 2
Main Board
Circuit diagram
CPU part.................................................................8 - 1
CD part ...................................................................8 - 2
Vol-Power part........................................................8 - 3
LCD/DC-Power part................................................8 - 4
Layout diagram .................................................8 - 5..8 - 8
Exploded view - cabinet...................................................9 - 1
Mechanical partslist .........................................................9 - 1
Electrical partslist ...............................................10 - 1..10 - 2
© 3140 785 32500
Published by LX 0322 Service Audio Printed in The Netherlands Subject to modification
TABLE OF CONTENTS
©
Copyright 2001 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.
CLASS 1
LASER PRODUCT
HANDLING CHIP COMPONENTS
1 - 1
© WARNING
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.
©
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
f
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
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.
d
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.
ESD
SAFETY
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.
ñ
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
i
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
©
DANGER: 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.
∂ Advarsel !
Usynlig laserstråling ved åbning når sikkerhedsafbrydere
er ude af funktion. Undgå udsaettelse for stråling.
CLASS 1
LASER PRODUCT
ß Varoitus !
Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen !
©
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.
f
"Pour votre sécurite, ces documents doivent être utilisés par
des spécialistes agréés, seuls habilités à réparer votre
appareil en panne".
GENERAL
Mains voltage :
-/00
-/00/05
-/00/05
230 V
:
-/05 230-240 V
:
-/17
-/17
120 V
Mains frequency :
: 50 Hz
:
-/17 : 60 Hz
Power consumption :
AMPLIFIER
Output power mains : 2 x 1 W
Residual noise : 60nW (volume minimum)
Channel difference : 3dB typ. at 500mW
Hum & noise : < 1.4 (Vol.max.-20dB)
TUNER - FM SECTION
Tuning range : 87.5 - 108 MHz
IF frequency : 10.7 MHz
Sensitivity : < 14dBµV at 26dB
Selectivity(stereo) : > 43.5dBµV at 46dB
IF rejection 90MHz : > 50 dB
Image rejection 106MHz : > 20 dB
S/N ratio (A-Weighted)
(input:5mV,75kHz dev)
:> 45 dB
Overall distortion
(40µV 75kHz 4mV i/p)
:7 %
TUNER - MW SECTION
Tuning range : 531 - 1602 kHz
: 530 - 1700 kHz
IF frequency : 450 kHz
Sensitivity : < 72dBµV/m at 26dB
Selectivity S9 : 16 dB
:
IF rejection 24 dB
:
Image rejection 28 dB
< 2 W typ.
Frequency response :
>
>
>
COMPACT DISC
:
SNR unwtd. > 50 dB
:
> 2 g
0dB typ. at 125Hz
Frequency response : ±3dB at 10kHz
Channel difference : < 3 dB
0.2% typ.
Crosstalk
1 kHz : > 30 dB
Crosstalk
10 kHz : > 30 dB
:
THD (1kHz,0dB)
THD (10kHz,0dB) : < 3%
Shock resistance
±Z axis
:
> 3 g
±X or ±Y axis
2 - 1
SERVICE TOOLS
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
anti-static table mat
large 1200x650x1.25mm 4822 466 10953
small 600x650x1.25m 4822 466 10958
anti-static wristband
4822 395 10223
connection box (3 press stud connections, 1MΩ) 4822 320 11307
extendible cable (2m, 2MΩ, to connect wristband to connection box) 4822 320 11305
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
TECHANICAL SPECIFICATIONS
2 - 2
SERVICE MEASUREMENT
Tuner SW
RF Generator
e.g. PM5326
Aerial replacement
DUT
Capacitor
Ri=50Ω
R=50Ω
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
S/N and distortion meter
e.g. Sound Technology ST1700B
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).
Tuner AM (MW,LW)
RF Generator
e.g. PM5326
Ri=50Ω
DUT
Frame aerial
e.g. 7122 707 89001
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
S/N and distortion meter
e.g. Sound Technology ST1700B
To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday´s cage.
CD
Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3)
L.P.F. = 13
th
order filter 4822 395 30204
DUT
L
R
Low pass filter 22kHz
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
3 - 1
6
7
8
9
0
!
@
%
1
2
3
4
5
#
$
^
&
1
REPEAT ALARM
BRIGHTNESS CONTROL
SLEEP TIMER
WAKE
-
UP TRACK
CD
RADIO
TIME
/
ALARM
DAILY ALARM
RESET
VOLUME
PUSH TO OPEN
CD/ RADIO
OFF
2
TIME
ALARM 1
ALARM 2
SET AL
1
HOUR
TIME SET
MINUTE
SET AL
2
AL
1
TIME
PM
PRESET
3
CONNECTIONS AND CONTROLS
3 - 2
CD
CD
TIME
AL
2
REPEAT ALARM
BRIGHTNESS CONTROL
SLEEP TIMER
WAKE
-
UP TRACK
CD
RADIO
TIME
/
ALARM
DAILY ALARM
RESET
VOLUME
CD/ RADIO
OFF
BAND
RADIO
FM
TUNING
PRESET
1
2
3
4
5
RADIO
TIME
AL
2
PM
REPEA
T ALARM
BRIGHTNESS CONTR
OL
SLEEP TIMER
WAKE
-
UP TRACK
CD
RADIO
TIME
/
ALARM
DAILY ALARM
RESET
VOLUME
CD/ RADIO
OFF
5
6
SLEEP TIMER
BAND
RADIO
FM
TUNING
PRESET
1
2
3
4
5
TIME
AL
2
PM
AL
1
TIME
SLEEP
REPEA
T ALARM
BRIGHTNESS CONTROL
SLEEP TIMER
WAKE
-
UP TRACK
CD
RADIO
TIME
/
ALARM
DAIL
Y ALARM
RESET
VOLUME
CD/ RADIO
OFF
7
X
8
9
CONNECTIONS AND CONTROLS
3 - 3
CD /RADIO
OFF
CONNECTIONS AND CONTROLS
radio /
In the standby mode, press ALARM 1 / ALARM 2
to select the alarm mode. Check the respective
icon appears in the display: CD
This can be useful when for example you need to be
SETTING THE ALARM TIME
woken up at a different time during the week and at the
weekend.
1.
This enables
.
.
buzzer
CD playback from the first track as your alarm call.
Either press briefly:
• ALARM 1 once for CD alarm
radio / buzzer
• ALARM 2 once or more for
alarm.
Press SET AL 1 or SET AL 2 to activate the alarm
setting mode.
2.
Press HOUR/ MINUTE to adjust the hours and
=The current alarm time display flashes.
3.
minutes respectively.
the display will increase the hours / minutes
rapidly and continuously.
adjust the time slowly.4.Press SET AL 1 or SET AL 2 again when you
have reached the correct time.
Alarm time display
=You will hear a double beep to confirm the time setting.
dim
➟
• With your finger held down on HOUR/ MINUTE,
• Press HOUR/ MINUTE briefly and repeatedly to
VOLUME,
/
+
AL2 TIME = 6:20
AL 1 TIME = 7:45,
If you have set both alarms, the standby alarm time
display will show the alarm time which is ready to go
off first, according to the current clock time.
E.g. if current clock time = 7:30
the standby alarm display shows the alarm time, 7:45.
GENTLE WAKE VOLUME
A sure way of getting up in the mornings, the gentle
wake volume for the alarm begins from a fixed gentle
maximum volume is uo : 25.
volume (10) and gradually increases to a maximum
higher setting of ( 25.)
• The default low volume is uo : 10, and the
• During the alarm call, if you press
the volume stops automatically getting louder.
3 minutes, you will
after
medium
➟
bright
SETTING THE CLOCK AND ALARM TIMES
MEMORY BACKUP
alarm and radio presets to be stored for up to 3
minutes when there is a power interruption e.g. AC
power failure. The complete CD clock radio and display
The memory backup conveniently allows your clock,
- starts / pauses CD playback
will be switched off. As soon as the power supply
- skips to the next / previous CD tracks
- fast search within a track
- stops CD playback
/
CD:
CONTROLS/ INSTALLATION
need to re-enter the clock and alarm time settings.
returns, the display will indicate the correct time.
/ (up / down)
Radio:
TUNING
CONNECTING HEADPHONES
• If power supply returns
to select / store a radio preset station
5 -
-
tunes to radio stations automatically/ manually
-
PRESET 1
BAND - selects waveband (FM/AM).
ALARM 1
$
DISPLAY BRIGHTNESS
and gently fades in and out whenever you press a touch
screen control.
Connect headphones with a 3.5 mm plug into the p jack.
alarm
- selects CD
In the dim / medium setting, the backlight is interactive
=The built-in speaker will now be muted on the set.
- 3.5 mm jack for headphones
- switches CD alarm on/ off
p
%
There are 3 settings:
improves FM reception
-
Coil antenna
Power cord
^
INSTALLATION (see figure 2)
&
• Press REPEAT ALARM/ BRIGHTNESS CONTROL once or more.
AC Power Supply
(see figure 3)
In the standby mode, press TIME SET to activate
the clock setting mode.
Press HOUR / MINUTE to adjust the hours and
minutes respectively.
SETTING THE CLOCK TIME
The time is displayed using the 12 hour clock where the
Check if the power voltage, shown on the type plate
on the bottom of the set, corresponds to your
power supply. If it does not, consult your dealer or
1.
The current clock time in the main display flashes.
PM indicator lights up (on = PM, off = AM).
1.
=
2.
scrolls across the display continuously.
service center.2.Connect the plug to the wall outlet.
exit the demo mode, press any button on the
To
set.
...PH...IL..IPS
•
(see figure 3)
setting.
Press TIME SET again when you have reached the
display will increase the hours / minutes rapidly and
continuously.
•With your finger held down on HOUR / MINUTE, the
TIMER
SLEEP
RADIO
CD
Eg. TIME / ALARM
correct time.
adjust the time slowly.
You will hear a double beep to confirm the time
SETTING THE ALARM
3.
•Press HOUR / MINUTE briefly and repeatedly to
To disconnect the set completely from the power
3.
=
supply, withdraw the plug from the wall outlet.
Standby power consumption (clock mode)....1.5W
The serial and production number are located
on the bottom of the set.
Two different alarm times, ALARM 1 and ALARM 2
GENERAL
can be set in the CD / radio / buzzer
modes.
adjusts timer options for CD / radio
(see figure 1)
CONTROLS
English
1SLEEP TIMER -
- switches CD / radio on.
starts CD playback
2CD -
OFF
CD/RADIO
switches off CD / radio
TIME / ALARM
3RADIO - switches on radio
-
4
stops the active alarm for
programs your favorite CD
selects clock display
-
track for wake-up track alarm.
5WAKE-UP TRACK -
24 hours
6PUSH TO OPEN - push this corner to open CD door
7DAILY ALARM RESET -
BRIGHTNESS CONTROL
adjusts the volume
switches off the alarm for a 9 minute period
switches off timer function
changes the brightness of the display window
shows clock time and function status
briefly when respective function is in use
-
-
8+ / - VOLUME -
-
9REPEAT ALARM/
-
- shows radio frequency and CD track number
0Main display
- CD (AL 1 TIME), radio / buzzer
!Alarm time display - shows the alarm time and the
-
- switches radio / buzzer alarm on/ off
@ALARM 2
#Touch Screen Controls
selects radio / buzzer alarm
(AL 2 TIME)
chosen alarm activated:
controls appear when the radio / CD is switched on.
Clock controls shown in standby mode. The radio / CD
SET AL 1 - sets CD alarm time
HOUR - adjusts hour setting
TIME SET - sets clock time
MINUTE - adjusts minute setting
SET AL 2 - sets radio / buzzer alarm
3 - 4
–
If CD playback is paused for more than 15
minutes and no controls are pressed, the set
automatically goes to standby mode.
SELECTING A DIFFERENT TRACK DURING PLAYBACK
The track number appears briefly in the display when
you press
or
to skip tracks.
•
Press once or more to skip to the next track(s).
• Press more than once to skip to previous tracks
• Press once and playback will return to the
beginning of the current track.
FINDING A PASSAGE WITHIN A TRACK
1.
During playback, press and hold
or
=The CD is played at high speed and low volume;
the display will show 'Cd:' and your
current track number.2.Release or when you recognize the
passage you want.
=Normal CD playback and standby clock time
resumes.
RADIO RECEPTION (see figure 6)
1.
Press the RADIO button to switch on the radio.
=Radio touch screen controls appears throughout
radio operation
=The radio frequency and waveband appears in the
display for 10 seconds before reverting back to the
clock display.
2.
Press the BAND button to select your waveband
FM/AM.
3.
Tune to your station
manually
or
automatically
by using
/
(up / down).
To improve reception :
FM
: extend the coil antenna fully at the back of the
set for optimum reception.
AM
: uses a built-in antenna. Direct the antenna by
adjusting the position of your set.
4.
Adjust the sound using the
+ / -
VOLUME.
5.
To switch off the radio, press the TIME/ALARM
button.
TUNING TO A STATION (see figure 6)
Manual tuning:
1.
Press
/
briefly to find your station. Repeat
until you have found the desired station.
Automatic tuning:
• Press and hold
/
until the display
frequency starts to change frequency.
• When a station of sufficient strength has been
found, tuning will stop. Or you can stop the
automatic tuning search by pressing either
/
again. Repeat until you have found
the desired station.
PRESET STATIONS (see figure 6)
Storing preset stations
You can program up to five radio stations for each band.
If you like, you can also replace a preset station with
another frequency. The current station will be indicated
by a square round the preset number in the display.
E.g.
1.
Tune to your desired station (see RADIO
RECEPTION).2.As soon as you have found your station, press and
hold a preset number 1-5. Release the number
when you hear a double beep confirming that the
station has now been set.
Selecting preset stations
• Select and press a preset number, 1-5.
SLEEP TIMER (see figure 7)
About SLEEP TIMER
This feature is a built-in timer device which enables
the set to be automatically switched off during CD /
radio playback, after a set period of time. There are
three timer options: 60 , 30 and 15 minutes.
Setting SLEEP TIMER
1.
Press the SLEEP TIMER button rapidly once or
more to select your timer options: 60 , 30 and 15
minutes.
=The display will show
S
SL:
and the timer options
briefly.
= appears when the timer is active.
2.
To cancel the timer, you can either press:
• TIME/ALARM
• REPEAT ALARM/
BRIGHTNESS CONTROL
CD /RADIO
OFF
1
CD /RADIO
OFF
CD / RADIO SLEEP TIMERALARM CD
SELECTING CD WAKE-UP ALARM MODE
You can program and select a CD track number
between 1-99, when the set is in the standby or radio
playback mode.
However, if the track number programmed does not
exist on your CD, the CD will start playback from the
first track during the alarm call.
1.
Set the alarm time for AL1 TIME.
2.
Insert a CD into the CD compartment.
3.
Press ALARM 1 to select CD alarm mode.
4.
Press WAKE-UP TRACK to activate favorite
track programming.
5.
Press or until the desired track number
is shown.6.Press WAKE-UP TRACK to confirm the selected
track number.
= The display returns to standby clock time.
7.
If you want to review your programmed track
number, press WAKE-UP TRACK.
IMPORTANT!
The buzzer alarm option will automatically
replace the CD alarm if you have:
–
inserted a CD incorrectly;
–
inserted a damaged CD;
–
forgotten to insert any CD;
–
not closed the CD door properly.
SWITCHING OFF THE ALARM (see figure 4)
There are three ways of switching off the alarm.
Unless you cancel the alarm completely, the DAILY
ALARM RESET option will be automatically select-
ed after 59 minutes, from the time your alarm time
first sounds.
DAILY ALARM RESET
If you want the alarm mode to be stopped
immediately but also wish to retain the same alarm
setting for the following day:
• Press and hold DAILY ALARM RESET
=You will hear a beep tone to confirm that the alarm
reset has been activated.
REPEAT ALARM
This will repeat your alarm call at 9 minute intervals.
• During the alarm call, press REPEAT ALARM/
BRIGHTNESS CONTROL.
• Repeat as often as desired.
= Your alarm mode indication
,,
will
flash throughout the time the repeat alarm is
active.
CANCELLING THE ALARM COMPLETELY
When an alarm is cancelled this is shown by the
selected alarm indication and symbol disappearing
from the display.
To cancel the set alarm time
before it goes off:
• Press ALARM 1 or ALARM 2 until the alarm icons
//
disappears from the display.
CD PLAYBACK (see figure 5)
1.
Insert a CD with the printed side facing up, and
close the door.2.Press the CD button to start playback.
=Display shows: 'Cd: --' and the total number of
tracks, then your current track number, before
returning to clock time
=CD touch screen controls appears throughout CD
operation.
Other possible CD indications before return-
ing to clock time:
=door is shown if the CD door is not closed.
=noCd is shown if no CD has been inserted /
inserted incorrectly.
=nFCd is shown if the CD-R(W) is non-finalized
=Err indicates a general error in operation of the set.
3.
Adjust the sound with
+/-
VOLUME.
4
To interrupt, press
= flashes.5.Press again to resume playback.
6.
Press to stop playback. Or press TIME /
ALARM to return to
standby mode.
CD /RADIO
OFF
CD
Helpful Tip :
If you want the alarm to wake you up, FIRST
CHECK:
-
you have disconnected the headphones.
-
radio alarm : make sure you have tuned
properly to a station.
Helpful Tip
During an alarm call/ repeat alarm, only the
DAILY ALARM RESET, REPEAT ALARM/ BRIGHT-
NESS CONTROL and ALARM 1 or ALARM 2 and
+
/ - VOLUME
controls on the set will operate.
Helpful Tip :
In the CD stop position, the CD touch screen
display remains active for 5 minutes.
• Press
to start playback again if you have
stopped briefly e.g. to change a CD.
INSTRUCTIONS FOR USE
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