Philips aj 3920 service manual

Page 1

CD Clock Radio AJ3920l00/o1/oel17

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erviceManua

COMM

CONTENT PAGE @ngg

DIGITAL AUDIO
Safely 1
Connections and Controls 2
Specifications 2
Disassembly Diagram 8
Block Diagram 4
Wiring Diagram 5
Measure Setup 6
Service Test Programme 6
Tuner Board (FM/AM) 7
Tuner Board (FM/MW/LW) 8
Tuner Board (FM/AM/JAP) 9
Radio Alignment 10
CD Alignment 10
Combi Board - Layout diagram 11
- Circuit diagram 12
Exploded View Diagram - Cabinet 13
Electrical Partslist 14 - 16

Annex: RCD 1.30

CLASS 1

LASER PRODUCT

Mama-w

Published by Philips Consumer Electronics Printed in the Netherlands ©Copyright reserved Subiect to modificalion 4322 725 25392

2% PHILIPS

PCS 84 740

Page 2

HANDLING CHIP COMPONENTS

GENERAL Disuouurma unuunm;
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PRECAUTIONS
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WARNING ESD WAARSCHUWING

All 1c: and many other sermccnoucims are SUSCeOIlDlE to
eleclroslatit mscm'ges iESDj Careless handling durmg
repair can reduce inc dVaSIlCaiiy

When repairing make sure that you aleconnecled wt: 9 a
same poieniiai as the mg or lhe set vra a W151 wrap wrln
resistance Keep components and tools at this potential

(9 ATTENTION

Toai ies IC 21 beaucoup a aulles semlrcclriducleui : )nl
sensrbtes aux decharges slathues (ESD) Leur iahgevfir
pcurraii eire considérablement ecounee par la Iall qu'aunune
précaullon nest prise a leur manipulation

Lots de réparzticns s'assurer do men élre rellé au moms
pole'thtl Que ia masse Ge l'appaleil 21 erlnieer le bracelet
it"! C um Vésrsldrlce DB securlle

V6 i:i ; Ce que les composants ainsi que les outils ous- l on
utilise soienl égalemen! a co potenliel

Satery regulations require that the set be restored to its
Unglnai condition and that parts which are identical wrih
those speciiied be used

Bei jeaer Reparatur sins are gellenuen Slchelheilsvorr
schrilten 1U beachten Der Olignaizusland des Gerates
clan nichl veranoerl warden Fur Reparatuven sind Origrialr
arsaizleie zu verwenden

® Varning !
Osyniig lasers ping "at apparaien at oppnad ooh sparren
ar urxapptaa Eelrakta ejslraien

Pour van-a secunle, 065 documents doiveni étre uliiisés par
des Spécialsles agrées seuls nabiiités a repairer voire
appareil on marine

CS 58 912

A
A

WARNUNG

Alle 1c: um Vlele andere Haiblevo ilnd emplindhch
gegenuberelektrostatischen Ewn ngen (ESDj
UnsorgtalligP, Benandiung 1th Fri. 1 llurtall kann (he

Lebensdauer drasnscn reduzleren,

Sargon sis datur daB sie im Reparatunaii uber gin Puls
afmbafld ml! Widerstano "Vii oern MEESEDOIeflHai 085

Gerates verounden sind

Hail?" Sue Bauleiie und Hiltsmlltet ebenlaiis aui diesem

Poletlial

Le norrre or Siculezza esttgoho one i'apparaccno venga
rimesso neiie CORdtllom originzli 2 Che Siann uttitZZalli
pezZi m lliamblaga Identicr a men specmcari

Les normes dc seems, exigent auei appareil sort rarnls
al etal d orrgme el que scram ullilSeES les places do

rechange denliques a belles spéclhées

Adva rsel !

Al e iC's en vele aarm-r haitgeleidars zijn gevoatig voor
electrostatiscrie unit n wan lESD)

Onzorgvuldig beh de iijdens reparatie kart de ievensduur
orasnscn ooen V9! ' imvm. Zorg ervcor dal u lijcens reua/atle
via to n polsbani' r '31 weerstnnd verbmulon bent met heuelide
pole 1 mi 1S1 ma '3 var her apparaai

Houd Componuiilen all huipmiqaeien ooh up dilzellde potentiaal

(D AVVERTIMENTO

Tutti ic e parocchi semi conduttori sono senSibiltalle scariche
Stallone (ESD).

La loro longevita potrebbe essere lortcmenle Ildalta in casu a:
non ossemzrone delta piu grands cauz.one alla lore
mampuiazone Durante le ripar Jlll occuire quinoi essere
co - 5.11 aiio Slesso poll) to queilo delia massa
oelapparecchio tramile uh oraccialetto a leSlSIetlZB.
Asstcurarst one 1 component: 0 anche 9i. Uleflslii con quail Si
lavora siario anche a QUSSIO DOIEUZlaiE

V91 -7,bepal4ngen vereisen oatiieiaoparaaiin zijn
1 irspronkeiijke ioesiand wnrai leruggeolachl en dal
underdyeni roeniiex aan de geSDECitheetdej women
toegepast

Varoitus !

Usyniig laserstr'aling ved éDriirlg nar sikkevhedsatmydere er Avatussa lailleessa ja suajaluklluksen ohitenaessa oiei ailtiina

mm: at tunktton unuga udsaeneise torsiranng

nakymattdmaiie iaserisateilylle Ara Katso saleeseen i

CON NECTIONS AND CONTROLS

a; ALARM l
@TlME

FUNCTION C6)
BUTTONS

HEADPHONE ii"
SOCKET 0

CD STOP/OFF la
(3 REPEAT

ALARM

CONTROLS

(t) WAKE UP TRACK

® OPEN/CLOSE
@ TUNING

® VOLUME

@ BAND SELECT

® WAKE UP TRACK:

- to display the CD wake-up track number for
ALARM 1 or ALARM 2

, to change the CD wake-up track number
for ALARM 1 or ALARM 2

(2) TIME:
- to adjust the time of the clock
- to resume to the clock display

@ ALARM 1

- to display the alarm time of ALARM 1
- to set alarm time 1,

- to enable/disable ALARM 1

® ALARM 2

- to display the alarm time of ALARM 2

- to set alarm time 1

- to enable/disable ALARM 2

@ Dbl m

- to select a next or previous track in CD play
mode

, to search forward or backward in CDpIay
mode

~ to adjust the TIME or the ALARM TIME
setting

~ to select a wake-up track

- to adjust the buzzer tone number

© FUNCTlON BUTTONS
BUZZER
>to select the buzzer tone for ALARM 1 or
ALARM 2
~to set ALARM 1 or ALARM 2 to buzzer
alarm mode

RADIO
-to go to radio mode

-to set ALARM 1 or ALARM 2 to radio alarm

mode
CD
-to go to CD mode
-to set ALARM 1or ALARM 2 to CD alarm
mode
BRIGHTNESS
-to change the brightness of the LCD
display illumination
SLUMBER
-to switch slumber function on/ott
- to set slumber time
-to display remaining slumber time
ALARM RESET
- To stop the active alarm for 24 hours
(7, HEADPHONE SOCKET R
Q9 CD STOP/OFF
- to switch off CD
to switch off radio
to disable ALARM lor ALARM 2
to reset the wake-up track to track 1 for
ALARM 1 orALARM 2

® REPEAT ALARM
- to swrtch off the alarm temporarily

BAND SELECT - to select the waveband
® VOLUME , to adjust the sound level
@ TUNING » tor station selection

® OPEN/CLOSE - to open and close the CD-
door

SPECIFICATIONS

GENERAL

Mains voltage

Mains frequency

Power consumption
Output power
Dimension (Wx H x D)
Weight

COMPACT DISC

Frequency response
Signal/hiss ratio
Distortion

Channel difference
Channel crosstalk
Laser wavelength
Laser light power

-/00 :

-I01

406 :
»/17 :
-/00 :
401/06 :
-/17 :

iSdB :

attKHz
at 1KH2 :
at1KHz :

TUNER - FM section

Tuning range

IF frequency
Sensitivity
Selectivity

IF rejection
Image rejection
AM suppression
Stereo separation

-/06 E

1KHz .3

TUNER - AM section

Tuning range
IF frequency
Sensitivity
Selectivity

IF rejection

Image rejection

MW :
-I17 .
LW :

: 468 :5Hz
MW '
LW :
MW :
LW :
MW :
LW :
MW :
LW :

230V
120/230V
100V
120V
50Hz
50/60Hz
BOHz
20W

2 x 0.5W
315x 229 x 87mm
1 .7Kg

30 - 16KHz
> 80dB

< 0.5%

> 2dB

> 50dB

780 1 ZOnm
< 0.3mW

87.35 -108.25MHZ
76.1 - 89.9MHZ
10.7MHZ

< ZZdBf at 26dB S/N

> ZOdE at SOOKHZ B.W.
> SOdB

> ZOdB

> 25dB

> 20115

512 » 1635KHZ
530 - 1710KHZ
147 - 291KHZ

< AOOOuV/m at 20dl3 S/N
< SOOOuV/m at ZOdB SIN
> 16GB
> 20dl3
> 24dB
> 27GB
> 28dB
> 30GB

22

PCS 84 741