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SURROUND RECEIVER

Service

TABLE OF CONTENTS
Page
Location Boards / System info.................................................. 1-2 Technical Specification .............................................................. 1-3 Service Tool / Measurement setup / Safety .............................. 1-4 Warning / Handling Chip components ...................................... 1-5 Abbreviations ............................................................................ 1-6 Instruction for Use ...................................................................... 2-1 Wiring diagram ......................................................................... 2-18 Block diagram ........................................................................... 3 4 Service Test program ............................................................... 5 Dismantling hints / Service positions ........................................ Front Board .............................................................................. 6 Tuner 95 diagram ...................................................................... 7A Dolby Pro Logic Board ............................................................. 8 Mains Board .............................................................................. 9 Mono Board .............................................................................. 10 Exploded view ........................................................................... 11 Partslist Exploded view ........................................................... 12 13 Electrical partslist Mono Board .................................................

Safety regulations require that the set be restored to its original condition and that parts which are indentical with those specified be used. Copyright 1995 Philips Consumer Electronics B.V. Eindhoven, The Netherlands

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All rights r e s e ~ e dNo part of this publication may be reproduced, stored in a retrieval . system or transmitled, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Published by MD 0009 Service Audio Printed in the Netherlands Subject to modification

3104 215 50040

PCS 102 412

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PHI LI PS

1-2

LOCATION OF PRINTED CIRCUIT BOARDS

- - -.
W..

~

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.. -_

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A-.

.

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IO Board
-

SYSTEM INFORMATION

Receiver MX740122 include : FR740100

Front speaker

Center speaker

Surround Speaker

2 x Home Cinema Speaker 60W

Home Cinema Center Speaker 60W

2 x Home Cinema Surround Speaker 60W

PCS 102 413

General
Mains voltage Mains frequency Power concumption Dimension Remote control : 230V : 50Hz :1 2W at stby : 138x435~350 mm : RC2526

Dolby Pro Logic
: Lt , Rt into Left, Right Stereo bypass from Dolby Pro Logic decoding : Lt , Rt into Left, Right, Center, Surround Dolby 3 Stereo decoding : Lt , Rt into Left, Center, Right Center phantom decoding : Lt , Rt into Left, Right, Surround (Phantom = no center speaker) Surround delay : variable (15 - 30 msec) : Large, smal, phantom Center mode Testtone

Amplifier
Output power Stereo mode (L+R) Surround mode L+R Center Surround Left+Right Distortion (5W) I ~ z k 40Hz - 20kHz: Headphone Output level :2x60W DIN (1kHz, 0,7%THD, 6Q) : 2x60W (1kHz, O,7%THD, 6Q) : 60W (IkHz, 0,7%THD, 6Q) : 2x60W (1 kHz, 0,7%THD, 6Q) : r 0,05% : 10.2% : 6,3mrn stereo jack with switch : 3V EMF, 60Q
: r -65dB : r -60dB

Tuner - (Tuner95)
RDS FM Tuning range : Only in 100

Crosstalk between source -1 kHz (1w) 250Hz - 10kHz Crosstalk between channels -1 kHz (1W) 250Hz - 1OkHz Frequency response Power stage protection Temperature

: r -55dB : r -50dB

IF frequency Aerial input Sensitivity at 26dB SIN Selectivity at 300kHz lmage rejection Distortion at RF=l mV,dev.75kHz -3dB Limiting point Crosstalk at RF=lmV,dev.40kHz MW Tuning range Grid IF frequency Aerial input Sensitivity at 26dB SIN Selectivity at 9kHz IF rejection lmage rejection Distortion at RF=50mV,m=80% LW only in 100 Tuning range Grid IF frequency Aerial input Sensitivity at 26dB SIN Selectivity at 9kHz IF rejection lmage rejection Distortion at RF=50mV.m=80%

10.7MHz f25kHz 75 Q coaxial 5 2pv t 55dB r 1OOdB 5 0,8% r2pv 235dB

: < 10Hz - 23OkHz (-ldB) : Shortcircuit : DC (Vout 21OV) for +I sec : Transformer (2140' Celcius) : Heatsink (t140° Celcius)

Audio Selector
Input sensitivity CD CDWAPE VCR
n /

6 C H I DVD Output level CDRrrAPE VCR Output level (variable) Center pre-out Subwoofer pre-out

: 250mV : 250mV : 250mV : 250mV : 250mV
: 250mV : 250mV

impedance impedance impedance impedance impedance

2 47kQ

47kQ 2 47kQ 2 47kQ 2 47kQ

: 531 - 1602kHz : 9kHz : 450kHz I kHz I : Frame aerial : < 1,5mVlrn : 2 23dB : 2 50dB : 2 33dB :<3%

impedance 5 1kQ impedance 5 1kQ

: 800mV : 800mV

impedance 2 1kQ impedance 5 1kQ

: 153 - 279kHz : 3kHz : 450kHz 11kHz : Frame aerial : <2,8mVIrn : 2 26dB : t 100dB : t 45dB : 13%dB

Tone controle
Loudness (volume r -20dB Ref: 1kHz=OdB) : 100Hz +6 dB : 10kHz +2,5 dB

Tone control (Ref: 1kHz=OdB) : Bass 100Hz -9dB i + 9 d B : Treble 10kHz -9dB i + 9 d B Hall DSC settings Personal Movie Speech Music Multimedia : Lt , Rt into Left, Surround, Right 100Hz O +4 - 4 +4 +7 1kHz O +2 +1 -1 +3 10kHz
O +4

dB dB dB dB dB

-2
+2 +6

PCS 102 414

SERVICE TOOL
Dolby Prologic Test Disc....... ....... ................4822 395 10216

MEASUREMENT SETUP
Tuner FM
DUT RF Generator e.g. - - - - -PM5326
--

Bandpass 250Hz-15kHz

LF Voltmeter

1

+
I N and distortion meter

Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).

Tuner AM (MW,L W)
Bandpass

LF Voltmeter
e.a. PM2534

RF Generator
DLiIçIOC

e,g. Sound Technology ST1700B

d j / ~ distortion meter and

1

To avoid atmospheric interference al1 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).

SAFETY

regdations 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

8
a

A

Les normes de sécurité exigent que I'appareil soit remis à l'état üorigine et que soient utilisées les pièces de rechange identiques à celles spécifiées. Les composants de sécurité sont marqués

a

a

Bei jeder Reparatur sind die geltenden Sicherheitsvorschriiten zu beachten. Der Originalzustanddes Gerates darf nicht veranderi werden. Für Reparaturen Sind Originalersatzteile zu vewenden. SicherheitsbauteileSind durch daç Symbol markiert.

A

SAFETY

@
Veiligheidsbepalingenvereisen, dat het apparaat in zijn oorspronkeliijketoestand wordt teruggebracht en da! onderdelen. identiek aan de gespecificeerde,worden toegepast. De Veiligheidsonderdelenzijn aangeduid met het symbool A

a
A

Le norme di sicurezza estigono che I'apparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambiago identici a quelli specificati. COmponentydi sicurezza 'On0 marcati con

a

PCS 69 733