philips_sq20 电路图.pdf

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1、RadioFans.CN 收音机爱 好者资料库 Philips Communication & Security Systems Supply Centre Breda Customer Support The Netherlands COPYRIGHT (c) Philips Electronics N.V. 1994 Printed in the Netherlands RadioFans.CN 收音机爱 好者资料库 Supply Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 199

2、4 - 1 - CONTENTS CHAPTER DESCRIPTION PAGE 1INTRODUCTION 3 1.1 GENERAL 3 1.2 THE SQ20 RANGE 3 2TECHNICAL DATA 4 3INSTALLATION INSTRUCTIONS 4 4CHECKING AND ADJUSTING 5 5CIRCUIT DESCRIPTION 6 5.1 DIFFERENCE BETWEEN THE SEVERAL OUTPUT-STAGES6 6 SPARE PARTS7 6.1 RECOMMENDED SPARE-PARTS TOTAL SQ 20 SERIES

3、 8 6.2 SPARE-PARTS, LISTED PER TYPE-NUMBERS 9 6.2.1 LBB 1227/009 6.2.2 LBB 1228/009 6.2.3 LBB 1229/0010 6.2.4 LBB 1230/0011 6.2.5 LBB 1231/0012 6.2.6 LBB 1232/0013 6.2.7 LBB 1233/0014 6.2.8 LBB 1234/0015 6.2.9 LBB 1235/0016 6.2.10 LBB 1236/0017 6.2.11 LBB 1237/0018 6.2.12 LBB 1238/0019 6.2.13 LBB 12

4、40/0020 RadioFans.CN 收音机爱 好者资料库 SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 733 2441614 February 1994 - 2 - CONTENTS (contd) 7DRAWINGS 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

5、 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, -1232/0

6、0, -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、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-O

8、UT 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 Supply Centre

9、 BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 3 - 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, comb

10、ined 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: SI 4822 861 05012 LBB 1229/00 Tuner-unit: SM 4822 733 24416 LBB 1230/00 P

11、re-Mixing Amplifier: : “ “ LBB 1231/00 30 Watt Mixing Amplifier: : “ “ LBB 1232/00 60 Watt Mixing Amplifier: : “ “ LBB 1233/00 120 Watt Mixing Amplifier: : “ “ LBB 1234/00 60 Watt Booster Amplifier: : “ “ LBB 1235/00 120 Watt Booster Amplifier: : “ “ LBB 1236/00 System Pre-Amplifier: SI 4822 861 050

12、19 LBB 1237/00 60 Watt System Amplifier: SM 4822 733 24416 LBB 1238/00 120 Watt System Amplifier: : “ “ LBB 1239/00 Mounting-brackets: “ “ LBB 1240/00 240 Watt Booster Amplifier: SI 4822 861 05039 Note: SM - Service manual SI - Service information All relevant service information for the products ca

13、n be found in the bulletins listed above. Not included in this manual are the callstation(s) LBB 9427/10, LBB 9527/10 and LBB 9527/60. The LBB 9427/10, and the new colour-item LBB 9527/10, are described within service manual: 4822 733 24437. The LBB 9527/60 is described within a service information:

14、 4822 861 05002. This Service Manual is intended to provide all necessary information to carry out corrective maintenance according to agreed policies. Spare parts are defined accordingly. In general this means repair on sub assembly level. Component level repair can only be allowed where it can be

15、carried out on a cost-effective way. SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 733 2441614 February 1994 - 4 - 2 TECHNICAL DATA Figure 2.1 upto and including 2.4 give all relevant data for SQ20 products. For products for which service information is released through SIs this inf

16、ormation can be found in chapter 8. 3 INSTALLATION INSTRUCTIONS - Opening the amplifier Access can be gained to the inner side of the amplifier by removing the top cover. Care should be taken not to lose the toothed washers which are fitted underneath the screws. For safety reasons these washers are

17、 required to electrically bond the top cover to the earthed chassis of the amplifier. And must therefore always be fitted. Warning !: Before removing the cover, disconnect the amplifier from the mains supply by removing the mains plug! - 19” Rack Mounting The range of SQ20 system amplifiers have bee

18、n designed for both tabletop and 19” rack mounting. Two mounting brackets (LBB 1239/00) can be ordered when rack mounting is required. To attach the mounting brackets, first remove the top cover as described. Locate the two screw holes provided for at both sides of the amplifier. Using the also adde

19、d screws, firmly mount the brackets to the amplifier. CAUTION !: SQ20 amplifiers are not suitable for any surveillance application with e.g. 20kHz. It is essential that the SQ 20 products are used within the specified temperature range. The maximum permissible temperature is + 45C. Care has to be ta

20、ken that when they are mounted within a 19” cabinet the air inside the 19” cabinet never exceeds the above mentioned maximum temperature. Supply Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 5 - - Mains connections and earthing The system amplifiers are supplied

21、 ready for use on 220 V a.c. mains. They are adjustable for use on 110 V, 127 V, 220 V 230 V and 240 V by resoldering the brown wire onto the appropriate tag on the mains transformer (T). The protective shield on the mains transformer should never be removed. Care should be taken to ensure that the

22、wire is hooked in, and firmly soldered onto the tag. A non restoring thermal fuse, located in the mains transformer, will disconnect the mains supply, should the mains transformer overheat. CAUTION: The amplifier must be tapped for the correct mains voltage, as described, before connecting it to the

23、 mains supply. On delivery the amplifier is supplied with a 2m long 3-core mains lead, terminated at one end with a 2 pole mains plug with earth contacts, and at the other end with a C.E.E connector. In some countries it may be necessary to replace the mains plug with one of a local standard type. A

24、 replacement plug must be wired as follows: Earth - green/yellow Neutral - blue Live - brown WARNING !:This amplifier must be powered via an earthed mains outlet WARNING !: This fusable link operates on the primary winding of the mains transformer, and although the mains indicator LED may be off the

25、 full mains supply voltage is still present inside the amplifier. 4 CHECKING AND ADJUSTING See Instructions for use which are always included in the same package as the product. SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 733 2441614 February 1994 - 6 - 5 CIRCUIT-DESCRIPTION Detai

26、led circuit descriptions are not included in this manual. The used technique for this amplifiers in combination with the selected spare parts makes this not necessary. The knowledge of the workshop- engineer should be at the required level. 5.1DIFFERENCE BETWEEN THE SEVERAL OUTPUT-STAGES: AMPLIFIER-

27、MODEL 30W 60W 120W MIXING- LBB 1231/001232/001233/00 BOOSTER- LBB 1234/001235/00 SYSTEM- LBB 1237/001238/00 ITEM 30W 60W 120W R150, R156 -4,7 R155, R158 -1,5k R149, R166 470 1k 1,5k R144 4,7 k5,6kQ5,6k C201 4700uF6800uF4700uF C207 4700uF F201 F 5AF 8AF 10A F202 F 10A F001 T 1AT 1,6AT 2,5A R501 330 1

28、80 100 ALL 5W Supply Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 7 - 6 SPARE-PARTS General: The spare-parts, as indicated in the following lists, are selected components / sub assemblies. The spare-parts are available from Philips Consumer Service. The mention

29、ed spare-parts, used within the several products of the SQ20 range, are NOT listed with the so-called pos. numbers. Instead of, we have used the commercial code number of the component. E.g. Transistor Q302 which has a commercial indicator C458 is listed as “transistor C458 NPN with a 5322. number-,

30、 and NOT as “pos. Q302”, with a 5322. number. SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 733 2441614 February 1994 - 8 - 6.1RECOMMENDED SPARE-PARTS TOTAL SQ 20 SERIES: Tuner PCB assy. (LBB 1229-1236-1237-1238) 5322 214 11157 Tuner-Meter 5322 344 50118 Battery connector 5322 265 3

31、0875 Mains switch 5322 277 11136 Mains inlet 5322 265 30876 Thermistor SDT 09 5322 116 30414 Mains transformer (LBB 1227-1229-1230) 5322 146 10331 Mains transformer PT-SQ20-30W 5322 140 60291 Output transformer 30 W 5322 146 10327 Mains transformer PT-SQ20-60W 5322 146 10332 Output transformer 60 W

32、5322 146 10333 Mains transformer PT-SQ20-120W 5322 146 10334 Output transformer 120 W 5322 140 60332 Mains transformer (LBB 1236) 5322 148 20024 Output transformer 240 W (OT-SQ20-240W) 5322 140 10481 Transistor C485 NPN 5322 130 62667 Transistor A673 PNP 4822 130 41412 Operational amplifier LF 353 5

33、322 209 81395 Operational amplifier LM 324 4822 209 80587 Integrated circuit BA 6144 4822 209 73037 Integrated circuit NJM 386 D 5322 209 72458 Diode 1 N 60 Germanium 4822 130 80562 Diode 1 N4148 (BAW 62) 4822 130 30613 Power-transistor C3281 5322 130 62673 Pre-amplifier integrated circuit OQ 0703 5

34、322 209 63972 Fan-motor 5322 361 10598 Fuses: F 0,5 A 4822 070 35001 T 0,5 A 4822 070 15001 T 1,0 A 4822 070 31002 T 1,6A 4822 070 31602 T 2,0 A 4822 070 32002 T 2,5 A 4822 070 32502 T 3,15 A 4822 070 33152 F 5,0 A 5322 253 40055 T 5,0 A 4822 070 35002 F 8,0 A 5322 253 40034 F 10 A 4822 070 61003 Ha

35、ndgrip (2 pcs. incl. screws) 5322 498 50319 Supply Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 9 - 6.2SPARE-PARTS listed per type-number: 6.2.1SPARE-PARTS LBB 1227/00 SQ-20 UNIVERSAL PRE-AMPLIFIER P.C.B assy. (27-1) 5322 214 91079 P.C.B assy. (27-2) 5322 214 9

36、1081 P.C.B assy. (27-3) 5322 214 91082 Mains transformer 5322 146 10331 Mains switch 5322 277 11136 Mains inlet 5322 265 30876 Rotary switch 5322 273 80347 Knob (volume) 5322 414 30152 Knob (tone control) 5322 414 30183 Handgrip (2 pcs. incl. screws) 5322 498 50319 6.2.2SPARE-PARTS LBB 1228/00 SQ-20

37、 CASSETTE UNIT P.C.B assy. (SQ20 28-1) 5322 214 11226 Integrated circuit (U2) TA 7668 BP 4822 209 71873 Front panel 5322 447 50154 Complete cassette player (commercial item)LBB 1228/50 19” mounting brackets (commercial item)LBB 1239/00 SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 7

38、33 2441614 February 1994 - 10 - 6.2.3SPARE-PARTS LBB 1229/00 SQ-20 TUNER-UNIT Tuner PCB assy. 5322 214 11157 Tuner-Meter 5322 344 50118 Tuner channel-selector switch 5322 210 10424 Loudspeaker 5322 240 40196 Mains transformer (PT-SQ20-PM) 5322 146 10331 Mains switch 5322 277 11136 Mains inlet 5322 2

39、65 30876 Fuse (5A) 5322 253 40055 Battery connector 5322 265 30875 Potentiometer (50K) 5322 101 11138 Transistor C485 NPN 5322 130 62667 Transistor A673 PNP 4822 130 41412 Operational amplifier LF 353 5322 209 81395 Integrated circuit BA 6144 4822 209 73037 Integrated circuit NJM 386 D 5322 209 7245

40、8 Diode 1 N 60 Germanium 4822 130 80562 Diode BAW 62 4822 130 30613 Diode 1N4148 4822 130 30621 Front panel 5322 447 50146 Handgrip (2pcs. incl. screws) 5322 498 50319 Knob (14) 5322 414 30183 Jack-plug (PJ-202 NP) 5322 265 20515 Phone jack (HT J064-03) 5322 267 10273 Phone jack 5322 267 10276 Suppl

41、y Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 11 - 6.2.4SPARE-PARTS LBB 1230/00 SQ-20 PRE-MIXING AMPLIFIER PCB assy. (SQ20-3) 5322 214 11211 PCB assy. (SQ20-7) 5322 214 11212 Mains transformer PT SQ.20-PM 5322 146 10331 Main switch 5322 277 11136 Mains inlet 4

42、300-1002 5322 265 30876 Battery connector (incl. fuse) DT55A02W-02 5322 265 30875 Fuses: F 0,5 A 4822 070 35001 T 1 A 4822 070 31002 T 0,5 A 4822 070 15001 Potentiometer RK163111A152 5322 101 11139 Potentiometer RK163111R376 5322 101 11138 Transistor C485 NPN 5322 130 62667 Transistor A673 PNP 4822

43、130 41412 Operational amplifier LF 353 5322 209 81395 Integrated circuit BA 6144 4822 209 73037 Integrated circuit NJM 386 D 5322 209 72458 Diode 1 N 60 Germanium 4822 130 80562 Diode BAW 62 4822 130 30613 Diode 1N4148 4822 130 30621 Front panel 5322 447 50153 Handgrip (2 pcs. incl. screws) 5322 498

44、 50319 Knob ( 18) 5322 414 30152 Knob ( 14) 5322 414 30183 Jack plug PJ-202NP 5322 265 20515 Phone Jack HTJ064-03 5322 267 10273 DIN 5 pol DJ-005 5322 267 10272 SQ 20 AmplifiersSupply Centre Breda SERVICE DOCUMENTATION 4822 733 2441614 February 1994 - 12 - 6.2.5SPARE-PARTS LBB 1231/00 SQ-20 30 W MIX

45、ING AMPLIFIER PCB assy. Main 30W(SQ20-1) 5322 214 11213 PCB assy. Pre-input (SQ20-7) 5322 214 11212 PCB assy. Power supply (SQ20-2)5322 214 11218 Mains transformer 30W 5322 140 60291 Main switch 5322 277 11136 Mains inlet 5322 265 30876 Thermistor SDT 09 5322 116 30414 Battery conn. incl. fuse 5322

46、265 30875 Fuses: F 5,0 A 5322 253 40055 T 2,0 A 4822 070 32002 T 1,0 A 4822 070 31002 Output transformer 30 W 5322 146 10327 Potentiometer A152 5322 101 11139 Potentiometer R376 5322 101 11138 Transistor C485 NPN 5322 130 62667 Transistor D673 PNP4822 130 41412 Transistor D613E NPN 5322 130 62961 Tr

47、ansistor D667 NPN 5322 130 43371 Power-transistor C3281 5322 130 62673 Power-transistor 2SD718(0) 5322 130 62836 Pre-amplifier integrated circuit OQ 0703 5322 209 63972 Operational amplifier LF 353 5322 209 81395 Integrated circuit BA 6144 4822 209 73037 Integrated circuit NJM 386 D 5322 209 72458 D

48、iode 1 N 60 Germanium 4822 130 80562 Diode D 1502 5322 130 82533 Diode BAW 62 4822 130 30613 Diode 1N4148 4822 130 30621 Diode P600D 5322 130 82746 Front panel 5322 447 50144 Handgrip (2pcs. incl. screws) 5322 498 50319 Knob ( 18) 5322 414 30152 Knob ( 14) 5322 414 30183 Jack plug 5322 265 20515 5P

49、DIN 5322 267 10272 Phone Jack 5322 267 10273 Made-and-lock 6 pol. 5322 267 40995 Supply Centre BredaSQ 20 Amplifiers Service documentation 4822 733 2441614 February 1994 - 13 - 6.2.6SPARE-PARTS LBB 1232/00 SQ-20 60 W MIXING AMPLIFIER PCB assy. Main 60W (SQ20-1) 5322 214 11214 PCB assy. Pre-input (SQ20-7) 5322 214 11212 PCB assy. Power supply (SQ20-2) 5322 214 11219 Mains tra