Philips FWM-15 Service manual
GB
CLASS 1
LASER PRODUCT
COMPACT
DIGITAL AUDIO
Service Manual
Service
Service
Service
Service
Service
FWM15/21/22/25
TABLE OF CONTENTS
Page
Location of PCBs & Version variations ......................1-2
Technical Specifications .............................................1-3
Measurement setup....................................................1-4
Service Aids, Safety Instruction, etc...........................1-5
Preparations & Controls .............................................2-1
Disassembly Instructions & Service positions ...........3-1
Set Block diagram ......................................................4-1
Main Board.....................................................................6
ECO Power Board .........................................................7
Tape Mechanism............................................................ 9
3CDC-LC-MP3CD2002 ...............................................10
Set Mechanical Exploded view & parts list ................. 11
Electrical parts list ..................................... ................. 12
Revision list ............................ .................................... 13
©
Copyright 2005 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 LX 0535 Service Audio Printed in The Netherlands Subject to modification
MP3 3CDC Mini System
3141 785 30131
Version 1.1
1 - 2
LOCATION OF PRINTED CIRCUIT BOARDS
MP3
B
O
ARD
3C
B
MAIN
BO
A
RD
ECO POWER BO
VERSION VARIATION S:
Type /Versions: FWM15
Features &
Board
in used:
/21 /22
Incredible Surround
Karaoke
News
RDS
Rotary Encoder (volume control)
Jog Shuttle
Voltage Selector x
Aux Input
Digital Outp ut
Headphone So ck et x x
Line Output
Subwoofer Output
Surround Output
Matrix Surround Loudspeakers
Standby - Cloc k Disp la y x x
Standby - Dark
ECO Power Standby (Clock Display Off)
ECO6 Tuner Board - System Cenelec
ECO6 Tuner Board - System Non-Cenelec
x
DC
O
RD
A
MAIN B
ONE PCB
x
x
ARD
OA
Only for /22 versions
RD
1 - 3
GENERAL:
Mains voltag e :
230V ± 10% for /22/25
Mains frequency : 50/60Hz /21
Power consumption :
≤ 15W at Standby /21
≤ 0.5W at ECO Standby /22/25
30W Active /22/25
Clock accura cy : < 4 second s pe r da y
Dimension ce nt re uni t : 265 x 310 x 330mm
TUNER:
FM
Tuning range : 87.5-108MHz
Grid : 50kHz
IF frequency : 10.7MHz ± 20kHz
Aerial input : 75!& coaxial
Sensitivit y at 26d B S/N : < 22∝V
Selectivit y at 300 kHz ba nd wi dt h : > 25dB
Image rejection,98MHz : > 40dB /21
Distortion at RF =1 mV, dev. 75 kH z : < 3%
-3dB Limitin g po int : < 23.5∝V
Crosstalk at RF= 1mV, dev. 40 kH z : > 18dB
MW
Tuning range : 530-1700kHz /21
Grid : 10kHz /21
IF frequency : 450kHz ± 1kHz
Aerial input : Frame aerial, 18.1 ∝H
Sensitivit y at 26d B S/ N : < 4.4mV/M
Selectivity at 300kHz bandwidth : > 18dB
IF rejection : > 45dB
Image reject io n : > 28dB
Distortion at RF =50m V, m=80% : < 5%
AMPLIFIER:
Output power
1)
:2 x 10W RMS
Frequency response wit hin -3 dB : 50Hz-1 5k Hz
Dynamic Bass Boost : DBB1, DBB2, DBB3, DBB Off
2)
Digital Soun d Cont ro l : Jazz, Tec hn o, Opt im al , Ro ck
2)
Headphone ou tp ut at 32 W ::900mV ± 1dB (max Vol.)
CASSETTE RECORDER:
Number of trac k : 2 x 2 stereo
Tape speed : 4.76 cm/sec +2.5/-1.5
%
Wow and flutter : < 0.40% DIN
Fast-wind/rewind time C60 : 130 sec
Bias system : 75kHz ± 5kHz
Rec/Pb frequency response within 8dB : 80Hz - 10kHz
Signal to nois e rati o (A-weighted) :
≥ 48dBA
COMPACT DISC:
Measurement done at output conn. of the CDC module.
Frequency response wit hin ± 1.5dB: 20Hz - 20kHz
Output level (in Vrms) : 550mV, Z
out
= 100Ω
Signal/Noise ratio (A-weighted) : > 75dBA
Distortion at 1kHz : < 0.003%
Channel unbala nc e at 1kH z : ±1dB
Channel sepa ra tion at 1k Hz : > 60dB
De-emphasis : 0 or 15/50 mS (Switched by subcode
on the disc)
1)
4Ω, 1 kHz, 10% THD
2)
Frequency response in each setting is software controlled.
Weight (w/o speakers) : 4.6Kg
Frequency response : 80 - 12500Hz (8dB)
110-127V/220-240V Switchable for /21
25W Active /21
50Hz /22/25
≤ 11W at Standby /22/25
> 80dB /22/25
:531-1602kHz /22/25
:9kHz /22/25
Impedance headphones 32Ω--1000Ω
SPECIFICATIONS
MEASUREMENT SETUP
Tuner FM
1-4
Bandpass
LF Voltmeter
e.g. PM2534
RF Generator
e.g. PM5326
DUT
250Hz-15kHz
e.g. 7122 707 48001
Ri=50Ω
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).
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.
Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).
CD
Use Audio Signal Disc
(replaces test disc 3)
DUT
L
R
SBC429 4822 397 30184
S/N and distortion meter
e.g. Sound Technology ST1700B
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
Recorder
Use Universal Test Cassette CrO2 SBC419 4822 397 30069
or Universal Test Cassette Fe SBC420 4822 397 30071
LF Generator
e.g. PM5110
DUT
L
R
S/N and distortion meter
e.g. Sound Technology ST1700B
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
SERVICE AIDS
1-5
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
Cassette:
SBC419 Test cassette CrO2................................. 4822 397 30069
SBC420 Test cassette Fe ..................................... 4822 397 30071
MTT150 Dolby level 200nWb/M............................ 4822 397 30271
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
HANDLING CHIP COMPONENTS
ESD Equipment:
Anti-static table mat - large 1200x650x1.25mm ... 4822 466 10953
Anti-static table mat - small 600x650x1.25mm..... 4822 466 10958
Anti-static wristband .............................................. 4822 395 10223
Connector box (1MΩ)............................................ 4822 320 11307
Extension cable
(to connect wristband to conn. box).................. 4822 320 11305
Connecting cable
(to connect table mat to conn. box) .................. 4822 320 11306
Earth cable (to connect product to mat or box) .... 4822 320 11308
Complete kit ESD3
(combining all above products)......................... 4822 320 10671
Wristband tester .................................................... 4822 344 13999
WARNING
GB
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.
F
ATTENTION
Tous les IC et beaucoup d’autres
semi-conducteurs sont sensibles aux
décharges statiques (ESD).
Leur longévité pourrait être considérablement
écourtée par le fait qu’aucune précaution n’est
prise à leur manipulation.
Lors de réparations, s’assurer de bien être relié
au même potentiel que la masse de l’appareil et
enfiler 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.
1-6
ESD
D
WARNUNG
Alle ICs und viele andere Halbleiter sind
empfindlich gegenüber elektrostatischen
Entladungen (ESD).
Unsorgfältige Behandlung im Reparaturfall kan
die Lebensdauer drastisch reduzieren.
Veranlassen Sie, dass Sie im Reparaturfall über
ein Pulsarmband mit Widerstand verbunden
sind mit dem gleichen Potential wie die Masse
des Gerätes.
Bauteile und Hilfsmittel auch auf dieses gleiche
Potential halten.
WAARSCHUWING
NL
Alle IC’s en vele andere halfgeleiders zijn
gevoelig voor electrostatische ontladingen
(ESD).
Onzorgvuldig behandelen tijdens reparatie kan
de levensduur drastisch doen verminderen.
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 riparazioni occorre quindi essere
collegato allo stesso potenziale che quello della
massa dell’apparecchio tramite un braccialetto
a resistenza.
Assicurarsi che i componenti e anche gli utensili
con quali si lavora siano anche a questo
potenziale.
GB
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used.
NL
Veiligheidsbepalingen vereisen, dat het apparaat bij reparatie in
zijn oorspronkelijke toestand wordt teruggebracht en dat onderdelen,
identiek aan de gespecificeerde, worden toegepast.
F
Les normes de sécurité exigent que l’appareil soit remis à l’état
d’origine et que soient utiliséés les piéces de rechange identiques
à celles spécifiées.
D
Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu
beachten. Der Original zustand des Geräts darf nicht verändert werden;
für Reparaturen sind Original-Ersatzteile zu verwenden.
“Pour votre sécurité, ces documents
doivent être utilisés par des spécialistes agréés, seuls habilités à réparer
votre appareil en panne”.
CLASS 1
LASER PRODUCT
GB
Invisible laser radiation when open.
Avoid direct exposure to beam.
Osynlig laserstrålning när apparaten är öppnad och spärren
är urkopplad. Betrakta ej strålen.
Warning !
S
Varning !
3122 110 03420
I
Le norme di sicurezza esigono che l’apparecchio venga rimesso
nelle condizioni originali e che siano utilizzati i pezzi di ricambio
identici a quelli specificati.
"After servicing and before returning set to customer perform a
leakage current measurement test from all exposed metal parts to
earth ground to assure no shock hazard exist. The leakage current
must not exceed 0.5mA."
Varoitus !
SF
Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen!
DK Advarse !
Usynlig laserstråling ved åbning når sikkerhedsafbrydere er
ude af funktion. Undgå udsaettelse for stråling.
2 - 1
Preparations
Rear connections
The type plate is located at the rear of the
system.
For users in the U.K.: please follow the
instructions on page 2.
A Powe r
Before connecting the AC power cord to the
wall outlet, ensure that all other connections
have been made.
WARNING!
–For optimal performance, use only the
original power cable.
–Never make or change any connections
with the power switched on.
B Antennas Connection
Connect the supplied AM loop antenna and FM
antenna to the respective terminals. Adjust the
position of the antenna for optimal reception.
MW Antenna
Position the antenna as far as possible from a TV,
VCR or other radiation source.
Preparations
FM Antenna
For better FM stereo reception, connect an
outdoor FM antenna to the FM ANTENNA
terminal.
C Speakers Connection
Front Speakers
Connect the speaker wires to the SPEAKERS
terminals, right speaker to "R" and left speaker to
"L", coloured (marked) wire to "+" and black
(unmarked) wire to "-".
Fully insert the stripped portion of the speaker
wire into the terminal as shown.
Notes:
–For optimal sound performance, use the
supplied speakers.
–Do not connect more than one speaker to any
one pair of +/- speaker terminals.
–Do not connect speakers with impedance lower
than the speakers supplied. Please refer to the
SPECIFICATIONS section of this manual.
Inserting batteries into the
remote control
Insert two batteries type R03 or AAA (not
supplied) into the remote control with the
correct polarity as indicated by the "+" and
"-" symbols inside the battery compar tment.
CAUTION!
–Remove batteries if they are exhausted
or will not be used for a long time.
– Do not use old and new or different
types of batteries in combination.
– Batteries contain chemical substances, so
they should be disposed off properly.
2
1
PREPARATIONS AND CONTROLS
Fix the claw
to the slot
2 - 2
4
(
^
5
9
2
£
#
)°%
8
&
21365
7
0
!
9
8
4
$
%
&*^
@
#
CD1
CD2
CD3
™
PREP ARATIONS AND CONTROLS
Controls
Controls on the system and
remote control
1
STANDBY ON y
–to switch the system on or to standby mode.
2 TUNER (BAND)
–to select waveband : FM or MW.
TAPE (TAPE 1•2)
–to select tape mode.
3 ECO POWER
–to switch the system on or to Eco Power
standby mode.
4 CD 1/ CD 2/ CD 3 (CD 1/2/3)
–to select disc tray 1, 2 or 3.
5 DSC (DIGITAL SOUND CONTROL)
–to select the desired sound effect :
JAZZ, ROCK, TECHNO or OPTIMAL.
6 CD OPEN/CLOSE
–to open or close the disc tray.
7 DISC CHANGE
– to change disc(s).
8 DBB (DYNAMIC BASS BOOST)
–to select the desired bass boost level.
9 PROGRAM
for CD ................. to programme disc tracks.
for Tuner ............. to programme preset radio
stations.
for Clock ............ to select 12- or 24-hour clock
mode.
0 Ta pe deck 1 operation
â .......................... to star t recording.
É .......................... to star t playback.
à / á ............... to rewind or fast forward.
70 ........................ to stop playback/recording or to
open the tape door.
Å .......................... to interr upt playback or
recording.
! Ta pe deck 2 operation
É .......................... to star t playback.
à / á ............... to rewind or fast forward.
70 ........................ to stop playback or to open the
tape door.
Å .......................... to interr upt playback.
@ CLOCK•TIMER
–to view the clock, set the clock or set the timer.
# DIM
–to select different brightness for the display
screen : DIM 1, DIM 2, DIM 3 or DIM OFF.
$ n
–to connect headphones.
% MASTER VOLUME (VOL +/-)
–to increase or decrease the volume.
^ Mode Selection
PLAY•PAUSE ÉÅ
for CD/MP3-CD…to start or interrupt playback.
for Plug & Play…(on the system only) to initiate
and start plug & play mode.
SEARCH•TUNING à (ALBUM)
SEARCH•TUNING á (ALBUM)
for MP3-CD ..... to select previous/next album.
for CD ................. to search backward/forward.
for Tuner ............. to tune to a lower or higher
radio frequency.
for Clock ............ (on the system only) to set the
hour.
STOP•CLEAR / DEMO STOP 9
for CD/MP3-CD…to stop playback or to clear a
programme.
for Tuner ............. (on the system only) to stop
programming or to erase a
selected preset.
for Demo ........... (on the system only) to activate/
deactivate the demonstration.
for Clock ............ (on the system only) to exit clock
setting or cancel timer.
for Plug & Play…(on the system only) to exit plug
& play mode.
PREPARATIONS AND CONTROLS
2 - 3
PREV í / PRESET 4 (TITLE)
NEXT ë / PRESET3 (TITLE)
for MP3-CD .....to select previous/next title.
for CD ................. to skip to the beginning of the,
previous, or next track.
for Tuner ............. to select a preset radio station.
for Clock ............ (on the system only) to set the
minute.
& Display screen
– to view the current status of the system.
* Disc tray
( REPEAT
– to playback track(s)/disc(s)/programme
repeatedly.
) SHUFFLE
– to playback all available tracks/programme of the
current disc in random order.
° MUTE
– to interrupt or resume sound reproduction.
SLEEP
– to activate/deactivate or set the sleep timer.
£ B
– to switch the system to standby mode.
– to switch the system to Eco Power standby
mode.
Notes for remote control:
– First, select the source you wish to
control by pressing one of the source select
keys on the remote control (CD 1/2/3 or
TUNER, for example).
– Then select the desired function (
É
,
í
,
ë
, for example).
Controls
Important notes for users in the
U.K.
Mains plug
This apparatus is fitted with an approved 13
Amp plug. To change a fuse in this type of plug
proceed as follows:
1 Remove fuse cover and fuse.
2 Fix new fuse which should be a BS1362 5 Amp,
A.S.T.A. or BSI approved type.
3 Refit the fuse cover.
If the fitted plug is not suitable for your socket
outlets, it should be cut off and an appropriate
plug fitted in its place.
If the mains plug contains a fuse, this should
have a value of 5 Amp. If a plug without a fuse
is used, the fuse at the distribution board
should not be greater than 5 Amp.
Note: The severed plug must be disposed of to
avoid a possible shock hazard should it be
inserted into a 13 Amp socket elsewhere.
How to connect a plug
The wires in the mains lead are coloured with
the following code: blue = neutral (N),
brown = live (L).
As these colours may not correspond with the
colour markings identifying the terminals in
your plug, proceed as follows:
– Connect the blue wire to the terminal
marked N or coloured black.
– Connect the brown wire to the terminal
marked L or coloured red.
– Do not connect either wire to the ear th
terminal in the plug, marked E (or e) or
coloured green (or green and yellow).
Before replacing the plug cover, make certain
that the cord grip is clamped over the sheath
of the lead - not simply over the two wires.
Copyright in the U.K.
Recording and playback of material may
require consent. See Copyright Act 1956 and
The Performer’s Protection Acts 1958 to 1972.
Norge
Typeskilt finnes på apparatens underside.
Observer: Nettbryteren er sekundert
innkoplet. Den innebygde netdelen er
derfor ikke frakoplet nettet så lenge
apparatet er tilsluttet nettkontakten.
For å redusere faren for brann eller elektrisk
støt, skal apparatet ikke utsettes for regn eller
fuktighet.
Italia
DICHIARAZIONE DI CONFORMITA’
Si dichiara che l’apparecchio FWM15 Philips
risponde alle prescrizioni dell’ar t. 2 comma 1 del
D.M. 28 Agosto 1995 n. 548.
Fatto a Eindhoven
Philips Consumer Electronics
Philips, Glaslaan 2
5616 JB Eindhoven, The Nether lands
CAUTION
Use of controls or adjustments or
performance of procedures other than
herein may result in hazardous
radiation exposure or other unsafe
operation.
PREPARATIONS AND CONTROLS
2 - 4
Radio reception is poor.
Recording or playback cannot be made.
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.
The remote control does not function
properly.
The timer is not working.
Not all lighted buttons are showing light.
The Clock/Timer setting is erased.
The system displays features
automatically.
If the signal is too weak, adjust the antenna or
connect an external antenna for better
reception.
Increase the distance between the Mini HiFi
System and your TV or VCR.
Clean deck parts, see “Maintenance”.
Use only NORMAL (IEC I) tape.
Apply a piece of adhesive tape over the missing
tab space.
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.
Check the speaker connections and location.
Select the source (CD 1/2/3 or TUNER, for
example) before pressing the function button
(…,Ì,Î).
Reduce the distance between the remote
control and the system.
Insert the batteries with their polarities
(+/- signs) aligned as indicated.
Replace the batteries.
Point the remote control directly towards the IR
sensor.
Set the clock correctly.
Press and hold CLOCK•TIMER to switch on the
timer.
If recording or tape dubbing is in progress, stop
recording.
Press DIM to select DIM OFF display mode.
Power has been interr upted or the power cord
has been disconnected. Reset the clock/timer.
Press and hold «on the system to switch off
the demonstration.
Problem
Solution
Maintenance
Cleaning the Cabinet
Use a soft cloth slightly moistened with a mild
detergent solution. Do not use a solution
containing alcohol, spirits, ammonia or abrasives.
Cleaning Discs
When a disc becomes dirty,
clean it with a cleaning cloth.
Wipe the disc from the centre
out. Do not wipe in circular
motion.
Do not use solvents such as
benzene, thinner, commercially
available cleaners, or antistatic spray intended for
analogue records.
Cleaning the disc lens
After prolonged use, dirt or dust may
accumulate at the disc lens. To ensure good
playback quality, clean the disc lens with Philips
CD Lens Cleaner or any commercially available
cleaner. Follow the instructions supplied with
cleaner.
Cleaning the Heads and the Tape Paths
To ensure good recording and playback quality,
clean the heads
A and B, the capstan(s) C,
and pressure roller(s)
D after every 50 hours
of tape operation.
Use a cotton swab slightly moistened with
cleaning fluid or alcohol.
You also can clean the heads by playing a
cleaning tape once.
Demagnetising the heads
Use a demagnetising tape available at your
dealer.
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.
“DISC NOT FINALIZED” is displayed.
Insert a disc.
Check if the disc is inserted upside down.
Wait until the moisture condensation at the lens
has cleared.
Replace or clean the disc, see “Maintenance”.
Use a finalised CD-RW or CD-R.
Problem
Solution
Tr oubleshooting
MAINTENCE AND TROUBLESHOOTING
DISMANTLING INSTRUCTIONS
Dismantling of the Lens Cassette
1) Uncatch 4 catches along the edge of the Cassette door
(pos 5) as shown in figure 1 and 2 to remove the Lens
cassette (pos 2).
3-1 3-1
Figure 2: Left Cassette door
Figure 1
Dismantling the 3CDC Module
1) Loosen the 4 screws, slide Cover top (pos 30) towards the
rear and remove it upwards.
2) Loosen 3 screws slide the Panel right (pos 26) towards the
rear and remove it outwards. Do likewise for the Panel left
(pos 27).
3) Push the gear slowly towards the front as shown in figure
Figure 4
Dismantling of the Panel Rear
3 until the CDC tray starts to move out of the Front Cabinet
(pos 8). The CDC tray is now disengage and can be pulled
out completely.
1) Loosen 6 screws C on the Panel rear (pos 24).
2) Press the 2 catches C1 inwards and dismantle the Panel
rear by pulling it towards the rear.
4) Remove the Cover Tray (pos 29) as shown in figure 4.
5) Loosen 4 screws A to remove the CDC Module (pos 28) as
shown in figure 3.
A
A
A
C1
2
Pull Rear
Panel out
Turn the Gear towards the Front
till the CDC Tray starts to open
1
Press Inwards
Figure 3
Figure 5
3-2
Dismantling of the Front Panel and Bottom Panel assembly
1) Remove 8 screws D mounting the Front board.
2) Remove 1 screw E supporting the bracket, Combi board
(pos 33) to the Panel front (pos 8).
3) Remove 1 screw F (see figure 5) mounting the Mains
transformer body to the Panel Bottom (pos 25).
Note: Care must be taken not to damage the board
because of the heavy Mains transformer.
3-2
Service pos A
4) The Front and Combi boards together with the Mains
transformer can now be remove.
5) Loosen 6 screws G and eject both cassette doors to
remove the Tape mechanism (pos 12).
Note: During re-assembly of the Tape mechanism
and Front board care must be taken to ensure
the wires are properly dressed and not touching any moving parts on the Tape mechanism.
Figure 6
Figure 8
Figure 7
Note: After re-assembly, it is very important to ensure the
wires from the Tape mechanism are routed properly
to ensure that they do not touch/obstruct all moving
parts.
Service pos B
4 - 14 - 1
SET BLOCK DIAGRAM
6 - 16 - 1
MAIN BOARDS
TABLE OF CONTENTS
FTD Display pin connection .......................................... 6-1
Tape Adjustment & Mesurement ................................... 6-2
Tuner Adjustment T able ................................................. 6-2
Layout Diagram(casse,amplifier,mains part-/21)........... 6-3
Layout Diagram(casse,amplifier,mains part-/22)........... 6-5
Main Circuit.................................................................... 6-7
Tape Part Circuit
.............................................................
6-8
Front Part Ci rcuit ........................................................... 6-9
Layout Diagram(front part)..................... ....................... 6-10
Circuit Diagram(tuner part -/21).................................... 6-12
Circuit Diagram(tuner part -/22).................................... 6-15
TDA7468 & TMP87CN71 Internal Block diagram ....... 6-18
Electrical parts list........................................................ 6-19
FTD DISPLAY PIN CONNECTIONS
FTD DISPLAY PIN NO.
FUNCTION
3
4
2
G
3
5
1
G
3
6
-
3
7
-
3
8
-
3
9
F
2
3
3
3
G
3
1
5
G
3
0
6
G
2
9
7
G
2
8
8
G
3
2
4
G
2
6
10
G
2
5
11
G
2
4
12
G
2
3
-
2
7
9
G
2
2
-
2
1
-
2
0
P
1
1
9
P
2
1
8
P
3
1
7
P
4
1
6
P
5
1
4
P
7
1
3
P
8
1
2
P
9
1
1
P
10
1
5
P
6
1
0
P
11
9
P
12
8
P
13
7
P
14
6
P
15
5
P
16
4
-
3
-
2
-
1
F
1
4G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
10G
-
6G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
12G
B1
B2
B3
B4
B5
-
-
-
-
5G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
3G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
1G7G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
Col
Dp
-
8G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
9G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
11G
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
B11
B12
B13
-
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
2G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
B5
B4
B1
B2
B3
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B10
B9
B8
B7
B6
B13
B12
B11
B5
B4
B3
B2
B1
Col 1
(11G)
(12G)
a
k
h
f
b
j
Dp
n
g
m
p
e
c
r
d
(2G - 9G)
1G
2G
10G
11G
8G
9G
3G
4G
5G
6G
7G
12G 11G
VARICAP ALIGNMENT
FM RF
FM IF
VCO
AM IF
AM RF
3)
108MHz
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
87.5MHz
(65.81MHz)
279kHz
153kHz
1602kHz
531kHz
5130
check
5122
check
5123
check
8V ±0.2V
4.3V ±0.5V
(1.2V ±0.5V)
8V ±0.2V
1.1V ±0.4V
8V ±0.2V
1.1V ±0.4V
1494kHz
558kHz
560kHz 5102
1500kHz
5103198kHz
1494kHz
558kHz
560kHz
1500kHz
198kHz
2106
5102
2106
3142 152kHz ±1kHz
1)
98MHz
5112
MAX
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
LW
153 - 279kHz
MW
FM/MW/LW- version, 9kHz grid
531 - 1602kHz
1700kHz
530kHz
5123
check
8V ±0.2V
1.1V ±0.4V
1602kHz
531kHz
5123
check
6.9V ±0.2V
1.1V ±0.4V
108MHz
108MHz 2155
5131
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
FM
MW
LW
98MHz, 1mV
continuous wave
450kHz
connect pin 6 of
IC 7101 (AM Osc.)
with 3.3kΩ to Vcc
Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.
4
1
3
5
5
A
A
5119FM
10.7MHz, 45mV
continuous wave
2D
mod=1kHz
∆f=±22.5kHz
1)
If sensitivity of frequency counter is too low adjust to max. channel separation
(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)
Repeat
ECO6, Sys + PA with frame aerial, 070799
TUNER ADJUSTMENT TABLE
( ECO6 FM/MW- and FM/MW/LW - versions with AM-frame aerial )
∆f=±10kHz
VRF = 0.5mV
C
see
remark
2)
220R
100nF
36
IC 7101
220R
100nF
40
IC 7101
2141
shortcircuit
to block AFC
21
IC 7101
max.
symmetric
f
o
AM AFC
MW
C
continuous wave
VRF = 2mV
5111
5114
2
0 ± 2 mV DC
0 ± 3 mV DC
MW
4)
FM/MW/LW- and FM/MW-version
( 9kHz grid)
531 - 1602kHz
B
∆f = ±30kHz
V
RF
as low as
possible
max.
symmetric
f
o
MW
FM/AM-version, 10kHz grid
530 - 1700kHz
3)
For AM RF adjustments the original frame antenna has to be used !
2)
RC network serves for damping the IF-filter while adjusting the other one.
4)
MW has to be aligned before LW.
Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter
FM
87.5 - 108MHz
(65.81 - 74, 87.5 - 108MHz)
FM/MW-version, 9kHz grid
531 - 1602kHz
(as low as
possible)
TAPE ADJUSTMENTS & MEASUREMENTS
6-26-2
General
ADJUST
MOTOR SPEED
CASSETTE
SBC420
(4822 397 30071)
3150Hz
TEST
RECORDER
MODE
PLAY
deck A or B
CHECK
WOW & FLUTTER
ADJUST
AZIMUTH
Playback
SBC420
(4822 397 30071)
3150Hz
SBC420
(4822 397 30071)
10kHz
PLAY
deck A or B
PLAY deck A
PLAY deck B
MEASURE
ON
or
11 12
LEFT RIGHT
or
headphone socket
or
11 12
LEFT RIGHT
or
headphone socket
11 12
LEFT RIGHT
or
headphone socket
READ ON
frequency
counter
W&F-meter check only
mV-meter
or
oscilloscope
left hand screw
ADJUST
with to
3758
CHECK
PLAYBACK
FREQUENCY RESPONSE
(4822 397 30071)
SBC420
PLAY deck A
PLAY deck B
11 12
LEFT RIGHT
or
mV-meter Check limits see fig.1
3150Hz ±1%
≤0.4 % DIN or
≤0.35 % CCIR
max. output level
& left=right
Recording
PRE-ADJUST
BIAS
CHECK
OVERALL
FREQUENCY RESPONSE
Input signal: 3mV
100Hz, 250Hz, 1kHz,
10kHz
13
via or
CHECK
14
DISTORTION
Input signal: 300mV
1kHz
13
via or
14
Remark: If high frequencies are not within lower limit, decrease bias and re-measure.
If distortion is too high increase bias and re-measure.
level(dB)
FERRO
FERRO
RECORDED
CASSETTE
FERRO
RECORDED
CASSETTE
RECORD
RECORD
PLAY
RECORD
PLAY
11 12
LEFT RIGHT
11 12
LEFT RIGHT
8dB
250
80
6dB
4k
10k
figure. 1
8dB
f(Hz)
15
or
mV-meter
mV-meter check only limits see fig.2
5701
or
level(dB)
THD-meter check only ≤5%
8dB
(10dB HSD)
6dB
100
250
4k
figure. 2
8dB
(10dB HSD)
10k
14V
rms
(40Vpp)
adj. ECO MTF DD AS, 110399
f(Hz)
6 - 3 6 - 3
Tuner part (ECO6)
LAYOUT DIAGRAM - MAIN BOARD(only for -/21)
(CASSETTE,MAINS,AMPLIFIER PART)
6 - 46 - 4
LAYOUT DIAGRAM - MAIN BOARD(only for -/21)
(CASSETTE,MAINS,AMPLIFIER PART)
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