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Philips LX700/21S/22S/25S - User Manual

Philips LX700/21S/22S/25S
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LX700/21S/22S/25S
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
©
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
Digital A/V Surround Receiver
3140 785 32480
Version 1.0
PREPARED
DIGITAL
SURROUND
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Summary

LOCATION OF PCB BOARDS

VERSION VARIATION

Details on model variations, features like RDS, and voltage differences.

PRODUCT SPECIFICATIONS

AMPLIFIER SECTION

Details on power output, distortion, frequency response, and sensitivity.

TUNER SECTION

Specifies tuning range, sensitivity, and selectivity for AM/FM reception.

MISCELLANEOUS; GENERAL SECTION

Covers power supply ratings, consumption, dimensions, and weight.

IR REMOTE CONTROL

Provides information on remote control range, keys, and battery type.

SPEAKER SPECIFICATIONS

Lists specifications for front, center, and subwoofer speaker systems.

MEASUREMENT SETUP

AM SECTION TEST SETUP

Diagram illustrating test setup for AM signal measurements.

FM SECTION TEST SETUP

Diagram showing test setup for FM signal measurements.

AUX SECTION TEST SETUP

Diagram for testing auxiliary input signals.

DISC SECTION TEST SETUP

Diagram for testing disc playback functionality.

SERVICE AIDS AND HANDLING

SERVICE TOOLS

Lists specialized tools required for servicing the unit.

ESD EQUIPMENT AND PRECAUTIONS

Details essential equipment for handling electrostatic discharge.

COMPACT DISC TEST MEDIA

Lists specific test discs used for service procedures.

CHIP COMPONENT HANDLING

Provides guidelines for safely handling and mounting chip components.

SAFETY WARNINGS

ELECTROSTATIC DISCHARGE (ESD) WARNINGS

Crucial safety information regarding electrostatic discharge sensitivity.

GENERAL SAFETY REGULATIONS

Instructions to maintain original condition and use specified parts for safety.

CONNECTIONS GUIDE

CONNECTING SPEAKERS

Step-by-step guide for connecting speakers to the receiver.

CONNECTING ANTENNAS

Instructions for connecting MW and FM antennas for optimal reception.

CONNECTING EXTERNAL COMPONENTS

Guides for connecting audio/video sources and recording devices.

RECORDING DIGITAL OUTPUT

Information on how to record digital audio signals from the receiver.

OPERATION AND SETUP

INSERTING REMOTE CONTROL BATTERIES

Instructions for inserting batteries into the remote control.

SURROUND SOUND SYSTEM SETUP

Guidance on optimizing surround sound system configuration and speaker placement.

SYSTEM POWER ON PROCEDURE

Steps for powering on and selecting input sources for the system.

FUNCTIONAL OVERVIEW

FRONT AND REAR PANEL LAYOUT

Identifies and describes the controls and connectors on the receiver's front and rear panels.

REMOTE CONTROL FUNCTIONS

Detailed explanation of buttons and their functions on the remote control.

TROUBLESHOOTING

REPAIR INSTRUCTION

MAIN UNIT REPAIR CHART

Flowchart for diagnosing and repairing main unit faults.

DISASSEMBLY INSTRUCTIONS

MAIN BOARD DISASSEMBLY

Step-by-step guide for removing the main circuit board.

POWER BOARD DISASSEMBLY

Instructions for safely removing the power supply board.

SERVICE POSITIONS

SERVICE POSITION A

Illustration showing the unit in a service position for access.

SERVICE POSITION B

Second illustration of the unit in an alternative service position.

BLOCK DIAGRAM

WIRING DIAGRAM

KEY; POWER SW BOARD DETAILS

IC INTERNAL BLOCK DIAGRAM

Internal schematic of the IC used on the key/power switch board.

CIRCUIT DIAGRAM

Schematic representation of the key/power switch board circuitry.

PCB LAYOUT VIEW

Visual layout of components and traces on the PCB.

ELECTRICAL PARTS LIST

List of components used on the key/power switch board.

CIRCUIT DIAGRAMS

PCB LAYOUT VIEWS

KEY + POWER BOARD PARTS LIST

SOURCE + PHONE; 6 CH IN BOARD

SOURCE + PHONE CIRCUIT DIAGRAM

Schematic for the source and phone input board.

SOURCE + PHONE PCB LAYOUT

Component layout for the source and phone input board.

6 CH IN CIRCUIT DIAGRAM

Schematic for the 6-channel input board.

6 CH IN PCB LAYOUT

Component layout for the 6-channel input board.

SOURCE;PHONE;6 CH IN PARTS LIST

List of components for source, phone, and 6-channel input boards.

SOURCE + PHONE PCB CIRCUIT DIAGRAM

SOURCE + PHONE PCB LAYOUT

Component layout for the source and phone PCB.

6 CH IN PCB CIRCUIT DIAGRAM

6 CH IN PCB LAYOUT

Component layout for the 6-channel input PCB.

POWER BOARD DETAILS

POWER BOARD INTERNAL IC DIAGRAM

Internal schematic diagram of the ICs used on the power board.

POWER BOARD CIRCUIT DIAGRAM

Schematic of the power board's electrical circuits.

POWER BOARD PCB LAYOUT

Component placement and routing on the power board PCB.

POWER BOARD ELECTRICAL PARTS LIST

List of all components used on the power board.

POWER BOARD CIRCUIT DIAGRAM

POWER PCB LAYOUT

POWER BOARD PARTS LIST

MAIN BOARD DETAILS

MAIN BOARD INTERNAL IC DIAGRAM

Internal schematic of ICs used on the main board.

MAIN BOARD CIRCUIT DIAGRAM (TOP LEFT)

Schematic of the top-left section of the main board.

MAIN BOARD CIRCUIT DIAGRAM (TOP RIGHT)

Schematic of the top-right section of the main board.

MAIN BOARD CIRCUIT DIAGRAM (BOTTOM LEFT)

Schematic of the bottom-left section of the main board.

MAIN BOARD CIRCUIT DIAGRAM (BOTTOM RIGHT)

Schematic of the bottom-right section of the main board.

MAIN BOARD PCB LAYOUT (COMPONENT VIEW)

Component placement on the main board.

MAIN BOARD PCB LAYOUT (COPPERSIDE VIEW)

Copper layer layout of the main board.

MAIN BOARD ELECTRICAL PARTS LIST

Comprehensive list of components for the main board.

DIGITAL AUDIO PROCESSOR STA308

STA308 BLOCK DIAGRAM

Functional block diagram of the STA308 digital audio processor.

STA308 SIGNAL FLOW DIAGRAM

Diagram illustrating the signal flow through the STA308.

STA308 PIN CONNECTION

Pinout diagram for the STA308 processor.

STA308 PIN FUNCTION

Detailed description of each pin's function on the STA308.

OCTAL BUFFER; LINE DRIVER 74 HCT244

74 HCT244 FUNCTIONAL BLOCK DIAGRAM

Block diagram of the 74HCT244 octal buffer/line driver.

74 HCT244 PIN ASSIGNMENTS

Pin assignments for the 74HCT244 in PDIP package.

74 HCT244 PIN DESCRIPTION

Description of each pin for the 74HCT244.

MAIN BOARD ELECTRICAL PARTS LIST

EXPLODED DRAWING

MECHANICAL & ACCESSORIES PARTSLIST

Philips LX700/21S/22S/25S Specifications

General IconGeneral
TypeReceiver
Remote ControlYes
Frequency Response20Hz - 20kHz
Outputs1 x RCA, 1 x 3.5mm
Power Output2 x 50W (4Ω)
Input Impedance47kΩ

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