• Document: Philips Communication & Security Systems Supply Centre Breda Customer Support The Netherlands
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Philips Communication & Security Systems Supply Centre Breda Customer Support The Netherlands COPYRIGHT (c) Philips Electronics N.V. 1994 Printed in the Netherlands Supply Centre Breda SQ 20 Amplifiers CONTENTS CHAPTER DESCRIPTION PAGE 1 INTRODUCTION 3 1.1 GENERAL 3 1.2 THE SQ20 RANGE 3 2 TECHNICAL DATA 4 3 INSTALLATION INSTRUCTIONS 4 4 CHECKING AND ADJUSTING 5 5 CIRCUIT DESCRIPTION 6 5.1 DIFFERENCE BETWEEN THE SEVERAL OUTPUT-STAGE’S 6 6 SPARE PARTS 7 6.1 RECOMMENDED SPARE-PARTS TOTAL SQ 20 SERIES 8 6.2 SPARE-PARTS, LISTED PER TYPE-NUMBERS 9 6.2.1 LBB 1227/00 9 6.2.2 LBB 1228/00 9 6.2.3 LBB 1229/00 10 6.2.4 LBB 1230/00 11 6.2.5 LBB 1231/00 12 6.2.6 LBB 1232/00 13 6.2.7 LBB 1233/00 14 6.2.8 LBB 1234/00 15 6.2.9 LBB 1235/00 16 6.2.10 LBB 1236/00 17 6.2.11 LBB 1237/00 18 6.2.12 LBB 1238/00 19 6.2.13 LBB 1240/00 20 Service documentation 4822 733 24416 14 February 1994 -1- SQ 20 Amplifiers Supply Centre Breda CONTENTS (cont’d) 7 DRAWINGS FIGURE: (as appendix) 7.1 LBB 1229/00 WIRING-DIAGRAM 7.2 LBB 1229/00 CIRCUIT-DIAGRAM PART 1 7.3 LBB 1229/00 CIRCUIT-DIAGRAM PART 2 7.4 LBB 1229/00 PRINTED CIRCUIT BOARD LAY-OUT 7.4.1 LBB 1230/00 CIRCUIT DIAGRAM PART 1 7.5 LBB 1230/00 CIRCUIT DIAGRAM PART 2 7.6 LBB 1230/00 PRINTED CIRCUIT BOARD LAY-OUT PART 1 7.7 LBB 1230/00 PRINTED CIRCUIT BOARD LAY-OUT PART 2 7.8 LBB 1231/00, -1232/00, -1233/00 CIRCUIT DIAGRAM PART 1 7.9 LBB 1231/00, -1232/00, -1233/00 CIRCUIT DIAGRAM PART 2 7.10 LBB 1231/00, LBB 1232/00, LBB 1233/00 PCB LAY-OUT PART 1 7.11 LBB 1231/00, LBB 1232/00, LBB 1233/00 PCB LAY-OUT PART 2 7.12 LBB 1234/00, LBB 1235/00 CIRCUIT DIAGRAM 7.13 LBB 1234/00, LBB 1235/00 PCB LAY-OUT 7.14 LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 1 7.15 LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 2 7.16 LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 3 7.17 LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 4 7.18 LBB 1237/00, LBB 1238/00 CIRCUIT DIAGRAM PART 5 7.19 LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 1 7.20 LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 2 7.21 LBB 1237/00, LBB 1238/00 PCB LAY-OUT PART 3 8. ADDITIONAL TYPE NUMBERS (SERVICE INFORMATION) 8.1 LBB 1227/00 UNIVERSAL PRE-AMPLIFIER 8.2 LBB 1228/00 CASSETTE UNIT 8.3 LBB 1236/00 SYSTEM PRE-AMPLIFIER 8.4 LBB 1240/00 240 W BOOSTER AMPLIFIER 9. GENERAL SERVICE INFORMATIONS SERVICE DOCUMENTATION 4822 733 24416 14 February 1994 -2- Supply Centre Breda SQ 20 Amplifiers 1 INTRODUCTION l.l. GENERAL The SQ20 range of high performance audio mixing, pre-mixing, booster and system amplifiers have been designed for use in a wide variety of Public Address environments. Ease of operation, combined with good service-accessibility have been optimised in their design. 1.2. THE SQ 20 RANGE The SQ20 range consists of the following products: LBB 1227/00 Universal Pre-Amplifier : SI 4822 861 05025 LBB 1228/00 Cassette Unit

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