Philips LX-700 Service manual
Service
Service
Digital A/V Surround Receiver
Service
Service
Service
LX700/21S/22S/25S
Service Manual
TABLE OF CONTENTS
Page
Location of PCBs............................................................. 1-2
Version Variations &Package .......................................... 1-2
Technical Specifications .................................................. 1-3
Measurement Setup ........................................................ 1-4
Service Aids ..................................................................... 1-5
ESD & Safety Instruction................................................. 1-6
System Setup & Controls .................................... 1-7 to 1-11
Troubleshooting ............................................................. 1-12
Repair Instructions.................................................2-1 to 2-2
Disassembly Instructions & Service Positions ...... 3-1 to 3-2
Set Block & Wiring Diagram ............................................... 4
Key / Power Switch Board.................................................. 5
Source + Phone / 6ch in Board .......................................... 6
Power Board ....................................................................... 7
Main Board ......................................................................... 8
Set Mechanical Exploded View & Parts list ....................... 9
PREPARED
DIGITAL
SURROUND
©
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.
Published by SL-ET0316 Service Audio Printed in The Netherlands Subject to modification
Version 1.0
GB
3140 785 32480
LOCATION OF PCB BOARDS
1-2
VERSION VARIATION:
Type/Versions
Features &
Board in used
RDS function
Grid Switch
Line Cord (Detachable)
Line Cord (Fixed)
AC Voltage (110V~127V / 220~240V)
AC Voltage (220V~240V)
AC Voltage Selector
LX700D
/21S /22S /25S
By software
x
x
x
LX700D LX700D
x
x
x
x
x
x
1-3
SPECIFICATIONS
AMPLIFIER SECTION
Power Output
- Stereo mode (DIN)................................................2 x 50 W
- Surround mode (1 kHz)............................50 W RMS/channel
Total Harmonic Distortion...........10 % at rated power (1 kHz)
Frequency Response .........................180 Hz-14 kHz/ 1 dB
Signal-to-Noise Ratio........................................> 65dB(CCIR)
Input Sensitivity...........................................................400 mV
TUNER SECTION
Tuning Range.................... FM 87.5 -108 MHz
.........................................MW 531 - 1602 kHz (9kHz steps)
/22S/25S
.........................................MW 530 - 1700 kHz (10kHz steps)
/21S
26 dB Quieting Sensitivity......................................FM 20 dB
26 dB Quieting Sensitivity..............................MW3260uV/m
Image Rejection Ratio...........................................FM 25 dB
................................................................................MW28 dB
IF Rejection Ratio..................................................FM 60 dB
................................................................................MW24 dB
Signal-to-Noise Ratio..............................................FM 55 dB
................................................................................MW35 dB
AM Suppression Ratio...........................................FM 30 dB
Harmonic Distortion...........................................FM Mono 3%
..........................................................................FM Stereo 3%
.....................................................................................MW5%
Frequency Response.....................FM 180 Hz-10kHz/ 6 dB
Stereo Separation.........................................FM 26 dB(1 kHz)
Stereo threshold..................................................FM 23.5 dB
MISCELLANEOUS / GENERAL SECTION
Power Supply Rating..................................220~240V/50 Hz
/22S/25S
...........110~127V/220~240V, 50 /60Hz
/21S
Power Consumption.................................................. 160 W
Dimensions (w x h x d)............... 435 mm x 58 mm x 362mm
Weight...........................................................................4.2 kg
IR REMOTE CONTROL
Effective Range.........................................................> 8 Meter
Number of Keys................................................................45
Battery (1.5V)............................................................AA x 2
SPEAKERS
Front Speakers / Surround speaker
System............................................................2-way shielded
Impedance/ ohm................................................................8Ω
Speaker drivers........................................3" woofer, flat tw
Dimensions (w x h x d)................... 89 mm x 270 mm x 41 mm
Weight.................................................................... 0.40 Kg
Center Speaker
System............................................................2-way shielded
Impedance/ ohm................................................................8Ω
Speaker drivers........................................3" woofer, flat tw
Dimensions (w x h x d)................286 mm x 95 mm x 67 mm
Weight.................................................................... 0.88 Kg
SUBWOOFER
Subwoofer (not magnetically shielded design)..............6.5"
Input power.....................................................100W (8Ω, DIN)
Dimensions (w x h x d)...............195 mm x 462 mm x 263 mm
Weight...................................................................... 5.5 Kg
MEASUREMENT SETUP
1-4
AC MILLIVOL TME TER
SIGNAL GENERATORAC
OUTPUT
AUTO DISTORTION METER
AM-FM STEREO SIGNAL
GENERATOR
INPUT OUTPUT
AM SECTION
OSCIL LOSCOPE
............
............
LOOP
AM LOOP ANT
LOAD 4 OHM
INPUT
RL
DUT
AC MILLIVOL TME TER
SIGNAL GENERATORAC
OUTPUT
AUTO DISTORTION METER
AM-FM STEREO SIGNAL
GENERATOR
INPUT OUTPUT
OSCIL LOSCOPE
............
............
FM SECTION
LOAD 4 OHM
INPUT
RL
DUT
AC MILLIVOL TME TER
SIGNAL GENERATORAC
OUTPUT
AUTO DISTORTION METER
DOLBY TEST METER
INPUT OUTPUT
AUX SECTION
OSCIL LOSCOPE
............
............
LOAD 4 OHM
.......
............
DUT
INPUT
.......
............
............
.......
............
.......
AC MILLIVOL TME TER
AUTO DISTORTION METER
DVD TEST DISC
DISC SECTION
OSCIL LOSCOPE
............
............
DUT
LOAD 4 OHM
.......
............
R L C SRSLSWR L C SRSLSW
INPUT
.......
............
............
.......
............
.......
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
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
Connectorbox (1MΩ) ..........................................4822 395 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”.
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."
Connections
+
B
B
1-7
NEODYMIUM RIBBON TWEETER
NEODYMIUM RIBBON TWEETER
HI-FREOUENCY
HI-FREOUENCY
.
+
SSUUB
+
+++
.
SSUUB
NEODYMIUM RIBBON TWEETER
HI-FREOUENCY
NEODYMIUM RIBBON TWEETER
HI-FREOUENCY
AC MAINS ~
IMPORTANT!
– Before connecting the AC power cord to the wall
outlet, ensure that all other connections have been
made.
–Never make or change any connections with the
power switched on.
– The type plate is located at the rear of the
system.
Connecting the speakers
Press up (or down) the speaker’s jack and fully inser t the
stripped portion of the speaker cable into the jack, then release.
12 mm
Before connecting the speakers:
● Mount the speakers onto the mini
speaker stands as shown in the illustration.
● Remove the protective cover only after
the connection and installation of
speakers are completed.
Connect the supplied speaker system
using the supplied speaker cable by
matching the colors of the jacks and
speaker cable.
Notes:
– Check the speaker cables are correctly
connected. Improper connections may damage the system due
to short-circuit.
–For optimal sound performance, use the supplied speakers.
– Do not connect more than one speaker to any one pair of
+/- speaker jacks.
– Do not connect speakers with impedance lower than the
speakers supplied. Please refer to the SPECIFICATION section
of this manual.
Speakers
Front Left (L)
Front Right (R)
Center
Surround (Rear) Left (L)
Surround (Rear) Right (R)
Passive Subwoofer
-
black
black
black
black
black
black
+
white
red
green
blue
grey
purple
1-8
j
Connections
Connecting antennas
MW Indoor Loop Antenna
Connect the supplied MW loop antenna to the MW
jack. Position the loop antenna to receive the clearest
sound.
(MW)
AM
FM Indoor Antenna
Connect the supplied FM antenna
to the FM jack. Move the antenna
in various directions until the
clearest signal is received.
Note:
– Keep the antenna as far away as
possible from the TV, VCR or any
radiation source to prevent unwanted noise.
FM Outdoor Antenna
For better FM reception, use a 75 ohm coaxial cable (not
supplied) to connect the system to an outdoor FM antenna
as shown.
Fix the claw
to the slot
Connecting from a DVD and
additional components
To listen to playback from your DVD or SACD player.
Option 1
6 CHANNEL-DVD/SACD IN
Use the supplied audio cables to connect the 6 CHANNELDVD/SACD IN jacks to the corresponding Multichannel
AUDIO OUT on your DVD or SACD player.
About 6 CHANNEL-DVD/SACD IN
The 6 CHANNEL-DVD/SACD IN can be used to connect
from a device with a built-in multichannel decoder (e.g.
Dolby, Digital, DTS, etc) and 6-channel output, i.e. a high
end DVD/SACD player
When using the 6 CHANNEL-DVD/SACD IN audio
input, the Receiver works as a multichannel amplifier. The
source reproduces surround sound and sends it to the
Receiver divided into the necessary channels. Therefore
the SURROUND button has no effect since the provided
signal is already multichannel.
From a source which is connected to the 6 CHANNEL-
DVD/SACD IN, audio input cannot be recorded.
OR
Option 2
DIGITAL IN
Connect the OPTICAL or COAXIAL jack to the
DIGITAL OUT jack on the DVD or SACD player. You
will need to set the Receiver’s digital input to the jack
you connected to (refer to “System Setup - Digital Input”)
Connecting additional components
For listening to the playback from other audio/ visual devices
through the Reveiver
● Connect the AUDIO IN (TV/AV or AUX) jacks to the
AUDIO OUT jacks on the TV, VCR or other audio/visual
device.
AM
(MW)
AND/OR
● Connect the DIGITAL IN ( OPTICAL or COAXIAL)
jack to the DIGITAL OUT jack on other audio/ visual
device. You will need to set the Receiver’s digital input to the
jack you connected to ( refer to “System Setup - Digital
Input”).
For recording to an external recording device
● Connect the AUDIO OUT jacks to the AUDIO IN jacks
on an analog recording device
.
AND/OR
● Connect the DIGITAL OUT jack to the DIGITAL IN
jack on a digital recording device. You can only mak
e a digital
recording from digital signal received from the DIGITAL
ack on this receiver.
IN
1-9
Connections Preparations
Notes:
– If the audio format of the digital input does not match
the capabilities of your Receiver, it will produce a strong
distorted sound or no sound at all
– Always refer to the instruction manual of the connedted
equipment to make an optimal connection
Recording from the digital output
It is possible to connect a digital recorder to the digital
output of the receiver. In this way, all signals coming from
the digital inputs can be recorded directly on the connected
audio recorder.
The receiver can be used to record digital sound audio
signal from DVD to CD-R.
Notes:
– Dolby Digital, DTS or MPEG signal are not possible to
record from this receiver.
– Digital recording is not possible when the digital source
material is copy-protected.
Inserting batteries into the
remote control
•
Open the battery
compartment.
•
Place the batteries in the
compartment with the correct
polarity as indicated by ‘+’ and
‘-’ symbols.
•
Close the cover.
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.
Setting up the surround sound
system
You must connect all the speakers and set up the system
properly in order to enjoy the Digital Cinema experience at
home (refer to “Connections - Connecting the speakers”).
You will have the feeling of being in the middle of the action
because sound is coming from everywhere around you. The
subwoofer can enhance the bass performance of your
system dramatically.
IMPORTANT!
Please sit at your usual listening position in order to
set up the speaker balance correctly.
Placing the speakers
To obtain
the best surround effect, place the speaker as
follows.
1 Place the front left and right speakers at equal distances
from the TV and at an angle of approximately 45 degrees
from the listening position.
2
Place the center speaker above or below the TV, so the
center channel’s sound is localized.
3
Place the surround speakers at normal listening ear level
facing each other or mounted on the wall.
4
Place the subwoofer on the floor near to the TV.
Notes:
–To avoid magnetic interference, do not position the front
speakers too close to your TV.
– If the rear surround speakers are installed farther away from
the listening position than the front and center speakers, it will
weaken the surround effect.
– All speakers should be securely installed to prevent accidents
and improve sound quality.
Switching on the system
1
After completing all the connections, connect the AC power
cord of the Receiver to the wall outlet. The system will go
into STANDBY mode.
2
Press STANDBY ON to switch on the last selected
source.
3
Rotate the SOURCE button or press TV/AV, DISC ,
TUNER or AUX on the remote control to select the
input source.
➜ The selected source will be displayed.
Functional Overview
p
+
+
Front and Rear panels
1 32 4
C
5 7 8 9 06
1
SURROUND
– to select multichannel surround(Dolby Digital, DTS,
Dolby Pro Logic or Dolby Pro Logic II) or stereo
sound effect.
2
TUNING S T
– to select the tuner frequency.
3
BASS
– to select bass adjustment mode.
4
TREBLE
– to select treble adjustment mode.
5
STANDBY ON y
– to switch between power on and standby mode.
6
DISPLAY SCREEN
– shows the status of the system.
1-10
7
PROGRAM
– in Tuner mode, to program MW/FM stations.
8
SOURCE
– to select the desired source or external input source
(TV/AV, DISC DI, DISC 6CH, TUNER or AUX).
9
VOLUME
– to adjust the master volume.
0
PHONE
– to connect headphones.
1 2 3 4 5
+
7 8 96
1
DIGITAL OUT
– connect to the digital inputs of an external audio
equipment.
– is active only when receiving input from DIGITAL IN
(Coaxial or Optical).
2
WOOFER LINE OUT
– connect to an active subwoofer (optional).
3
SPEAKERS
– connect to the front,center, surround and subwoofer
speakers.
4
DVD/SACD IN
– connect from the 6 channel output of a D
player.
5
AC POWER CORD
– connect to a standard AC outlet.
VD or SACD
.
+
.
6
MW / FM
– connect to the MW loop antenna or FM antenna
7
DIGITAL IN
– connect from audio equipment with digital (Coaxial or
Optical) audio output.
8
AUDIO IN (TV/AV, AUX)
– connect from the analog audio outputs of a TV or
other equipment.
9
AUDIO OUT
– connect to the analog audio inputs of an exter
recording device or amplif
Caution: Do not touch the inner
the rear panel. Electrostatic
ermanent damage to the unit.
ier.
discharge may cause
AC MAINS ~
nal
pins of the jacks on
DVD
1-11
Functional Overview
Remote control
1
2
DVD
3
4
5
6
7
8
9
0
!
¡
)
(
*
4
5
&
^
%
$
#
@
DRAMA, ACTION,SCI-FI,CLASSIC, JAZZ, ROCK or
DIGITAL.
@ SUBW +/-
– to adjust the subwoofer’s level.
REAR +/-
– to adjust the surround speakers’ level.
CENTER +/-
– to adjust the center speaker’s level.
TV +/-
– to adjust Philips’s television volume level.
#
SLEEP
– to set the sleep (auto-off) timer function.
$ DIM
– to select different brightness for the display screen.
%
MUTE
– to interrupt or resume sound reproduction.
^ NIGHT (Dolby Digital mode only)
– to optimise the dynamics of the sound output.
( VOL +/-
– to adjust the volume level.
) Numeric Keypad (0-9)
– to enter the number of a preset radio station.
¡ y
– to switch to standby mode.
Notes:
The following keys only operate for a Philips DVD
player. For details , please refer to a Philips DVD player
instruction manual.
Notes:
– The keys in the following list operate exclusively for this
Receiver only.
1 SOURCE
– to select the desired source (TV/AV, DISC, TUNER or
AUX).
4 1 2
– Press 1 /2 to select a preset radio station.
5 S / T
– in Tuner mode
frequency.
, to tune to a lower or higher radio
8 SURROUND
– to select m
Dolby ProLogic II) or stereo sound eff
ultichannel surround (Dolby Digital, DTS or
ect.
9 SOUND
– to select the various
soundfield effects:CONCERT,
2 DISC - DVD MENU
– to enter or exit the disc contents menu.
3 SYSTEM - DVD MENU
– to enter or exit the system menu bar.
6 ÉÅ
– to start or interrupt disc playback.
7 Ç
– to stop playing the disc.
0 REPEAT
– to repeat chapter, track or disc.
! REPEAT A-B
– to repeat a specific section on a disc.
& RESUME
– to continue disc playback after an interruption.
* OK
– to exit or confirm the selection.
1-12
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
solve a problem by following these hints, consult your dealer or service center.
Problem Solution
No power. – Check the connection to the AC power cord.
No sound or distorted sound – Check the connection to the speakers.
from speakers – Adjust the volume.
– Select the source you wish to listen to.
– If the muting is on, press the MUTE button.
– Replace the speaker cables.
No sound is heard from center or – Check the connections to the speakers.
rear speakers – Use the CENTER +/- or REAR +/- to adjust the volume level.
– Check the speaker settings are connect correctly.
No sound from subwoofer. –Check the connections to the subwoofer.
– Play the bass source.
Noise interfence – The unit is too close to a TV set or other electrical appliances, relocate the unit, or turn off
other appliances.
Sound cuts off during listening to – The positive and negative speaker cords may have short-circuited. Turn off the power and
music check the speaker cords.
– Turn off the power and turn it on again, then reduce the volume.
Sound from the left and right – Check that the left and right speakers are not positioned in reverse order.
speaker is reversed – Check the left and right speakers cables are not connected to the terminals in reverse
order.
Considerable noise in radio –Tune to the correct frequency.
broadcasts. – Connect the antenna.
– Route all connection cables away from the antenna terminals and wires.
– Fully extend the FM wire antenna. Position for best reception and secure to a wall.
– Connect an outdoor FM or MW antenna.
– Adjust the direction and position for best reception.
–Turn off the equipment causing the noise.
– Place the antenna far ther away from the equipment causing the noise.
emote control does not
The r
function. – Reduce the distance to the Receiver.
– Insert the mains plug into an outlet and press the main unit STANDY ON y button.
Can’t set NIGHT mode – Play a source with DOLBY DIGITAL 5.1 channel sound.
The display is dark – Press DIM again.
Low bass response – Check all speakers for correct polarity.
Can’t select DTS mode – Check the source’s sound output setting and turn on DTS output.
–Point the remote control at the remote sensor of the unit.
– Remove any possible obstacles.
– Replace the batteries with new ones.
– Check that the batteries are loaded correctly.
– Select a source (OPTIC
– Play a source with DTS sound.
– Select a OPTICAL or COAXIAL source connected by digital cable.
AL or COAXIAL) connected by digital cable correctly.
REPAIR INSTRUCTION
2-1 2-1
REPAIR INSTRUCTION
2-2 2-2
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