Infinity-EntraSubTwo-sub-sm 电路图 维修手册.pdf

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1、 ENTRA SUB TWO POWERED SUBWOOFER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev 1 4/2003 Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . .2 DETAILED SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 CONTROLS and CONNECTIONS . . . . . . . . . . . . . . . . . . . . . .5 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 MECHANICAL/PACKAGING PARTS LIST . . . . . . . . . . . . . . . . . . . . .8

3、 EXPLODED VIEW/SERVICE ACCESS . . . . . . . . . . . . . . . . . . . . .9 TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . .10 TECH TIP INFTT2003-02. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 PCB DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . .14 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . .20 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . .24 SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 Do

5、wnloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 5 ENTRA SUB TWO Entra Sub Two Frequency Response:28Hz 150Hz (3dB) Maximum Amplifier Output:250 watts RMS (20Hz 150Hz 500 watts peak with no more than 0.1% THD) Crossover Frequencies:50Hz 150Hz, 24dB/octave,continuously variable High-P

6、ass Frequency:150Hz (Speaker-Level Output Only) Driver:12 C.M.M.D. Dimensions (H x W x D):17 x 15-3/8 x 19-3/8 (432mm x 391mm x 492mm) Weight:47 lb (21.4kg) Infinity continually strives to update and improve existing products,as well as create new ones.The specifications and construction details in

7、this and related Infinity publications are therefore subject to change without notice. SPECIFICATIONS Entra Sub Two Downloaded from www.M manuals search engine RadioFans.CN 收音机爱 好者资料库 INFINITY ENTRA SUB TWO150W Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotes US 120vac/60HzYes108-132

8、120VrmsNormal Operation EU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS required ParameterSpecificationUnit QA Test LimitsConditionsNotes Amp Section Type (Class AB, D, other)Dn/an/a Load Impedance (speaker)4Ohmsn/aNominal Rated Output Power (120VAC150Watts135Domestic version only 120 VAC-6

9、0 Hz Rated Output Power (230VAC150Watts130EU Version only 230 VAC-50 Hz THD Rated Power0.3%122K filter140 Watts THD 1 Watt0.1%0.522K filter DC Offset10mV-DC30Amplifier output Damping factor50DF35Measured at amplifier board Measured at the speaker cable. 150 Watts THD LP1KHzLFE input driven only HP s

10、peaker out connector200Hz 10Speaker input driven - 4 Ohms 100Hz 10Speaker input driven - 8 Ohms Limiter THD at Max. Output Power5 T 1M ? (NO LOAD) Resistance from V+ (C6 P+) to V- (C8 P-) gradually Fully CHARGED should read 10k ? Resistance from V+ (C6 P+) to S+ (SPK O/P) should read 1M? Resistance

11、from V- (C8 P-) to S+ (SPK O/P) should read 1M ? 2. Power UpLED RED With a 5mV signal to Low level input, LED should change to GREEN -Voltage measurements (DVM) OP AMP LEDP-U4(1)P-U4(7) RED0Vrms11.84VDC GREEN7.13Vrms-12.93VDC 3. D.C. Operation -Voltage measurements (DVM) on CLASS D POWER AMP Between

12、V+Q4(E)Q1(C)Q10(C)U7(1)U7(2)U7(4)U7(6)U7(7)U7(8) And This Point GNDV-GNDGNDGNDGNDGNDGNDGNDGND Get this Reading 71.7V0V-71.7V0V-71.7V-71.5V-71.2V0V0V4.65V 4. Check Switching Frequency ? Oscilloscope - USE THE PROBE TIP TO U6(7) TO GND ? Reading 100kHz +/-10%,24Vp-p B. Pre Amp Section Line Level Input

13、 Sensitivity -Set upTurn level, XOVER FREQ POT Fully CW and LFE switch off Generator Set at 200mV50Hz Signal to Line level input Entra Sub Two Downloaded from www.M manuals search engine - Voltage measurements OP AMP U2(1)U2(14)U2(8)U3(7)U3(1)U3(14)U3(8)U5(7)U5(1) SPEAKER O/P 306.9mV461mV460mV658mV6

14、28mV598mV2.326V2.02V3.57V23.33V 2. High Level Input Sensitivity -Set upTurn level, XOVER FREQ POT Fully CW and LFE switch off Set Generator at 1.3V50Hz Signal to High level input -Voltage measurements 15.3V at speaker output 3. Low-Pass -Set upSet Generator at 200 mV100Hz Signal to Line level input

15、Measure voltage at S+ speaker output -Voltage measurement XOVER FREQ. SettingOutput CW14.03V CCW4.8V 4. LFE -Set upSet Generator at 200mV200Hz Signal to Line level input Measure voltage at S+ speaker output LFE switch SettingOutput Normal6V LFE18.32V See flow chart next page for diagnostics. Entra S

16、ub Two Downloaded from www.M manuals search engine ENTRA SUB II POWER MODULE TESTING FLOW CHART CAUTION : SPEAKER OUTPUT IS FLOATING AND IS NOT PROTECTED AGAINST A SHORT TO GROUND. ALL TEST INSTRUMENTS CONNECTED TO THE OUTPUT MUST BE FLOATING. ATTACH THE SCOPE PROBE TIP TO S - and REFERENCE LEAD TO

17、S+. (A 10mV signal may need from the input to trigger the Switch turn on) no no yes yes no no yes yes no no yes yes no no yes yes START Check +/-15V-MOD +/-15V voltage at U 6(8),U6(4) Discharge C37, Check fuse transformer, L4, rectifier, C6 and C8 Use scope to check switching frequency U6(7) 100KHz

18、+/-10% , 24Vp-p Check Q4(E) TO V- = 0V D.C. Power up with no signal input LED RED OK OK OK OK OK OK OK OK Check MUTE(+8V) and Q24,Q25,Q26 Use scope to check O/P U7(6) and GND 143Vp-p square wave shown Check L2,L3,C71,C72, C73,C74 I/P:10mv/50HZ Check +15V/SW Q4(E) TO V- =15V Replace Q18,Q22 CLASS D A

19、MP OK END Check U7,Q16,Q17, Q20,Q21,R87, D26,D35,C64 Check FB1,FB2,C45, C50,C60,C63, R81,R82 Check U7(1) = -58.3V Check MUTE(-12.9V), And Q24,Q25,Q26 Resistance check (no load) between V+ V-, V+ O/P,V- O/P and O/P to GND is 10K Entra Sub Two Downloaded from www.M manuals search engine 13 TECH TIPSTE

20、CH TIPS Troubleshooting tips and solutions to common service problems For model: Entra Sub Two TIP# INFTT2003-02 Subject: Replacing MOSFETS Q18, Q22 In the event you need to replace MOSFET transistors Q18 or Q22 as part of a repair, it is important to use ONLY the Infinity part# FE106401110 or only

21、the brands: International Rectifier, or Fairchild. Replace both Q18 and Q22 MOSFETs in the circuit, even if only one seems to be damaged. Do NOT mix DIP,DRIVERPN:IR2111 8PIN (IR)1U7 054-000100-100SMD DIODEPN:ES1D 200V 1A TAPING5D5,26,29,33,38 054-001002-100SMD ZENER DIODEPN:BZX84C10 10V SOT-23 TAPIN

22、G1D35 054-001501-100SMD ZENER DIODEPN:BZX84C15 15V SOT-23 TAPING3D6,7,9 054-007200-100SMD ICPN:TL072CDR SO-8 TAPING (TI)3U5,6,1 054-007400-100SMD IC;(OP-Amp)PN:TL074CDR TAPING (TI)2U2,3 054-033904-100SMD TransistorPN:MMBT3904LT1 SOT23 TAPING7Q11,14,13,5,8,25,9 054-033906-100SMD TransistorPN:MMBT3906

23、LT1 SOT23 TAPING4Q6,10,12,15 054-045580-100SMD IC;(OP-Amp)PN:NJM4558M-TE3 DMP-8 TAPING1U4 054-050601-100SMD ZENER DIODEPN:BZX84C5V6 5.6V SOT-23 TAPIN3D24,36,37 054-211400-100SMD Transistor (NPN)PN:DTC114EK SMT3 TAPING (ROHM 1Q7 054-414803-100SMD DIODEPN:LL4148 TAPING (Wishay)12D1-4,8,27,28,30-32,34,

24、39, 054-540100-100SMD Transistor (PNP)PN:MMBT5401 LT1 SOT-23 TAPING3Q20,24,26 Entra Sub Two Downloaded from www.M manuals search engine Part NumberDescriptionQtyReference Designator Miscellaneous 025-010300-000Thermo SwitchTSE-103 K L:50mm1TH1 041-115001-000BEAD COILYT-109111L5 042-010053-003XfmrYT-

25、10616-41 043-300101-000INDUCTOR30uH YT-100331L2 043-324300-000INDUCTOR324uH YT-107781L4 043-560200-000INDUCTOR56uH YT-107791L1 043-700101-000TOROIDAL INDUCTOR70uH YT-106821L3 044-100100-000SMD FERRITE BEADPN:321611 600R/100MHz 12062FB1,FB2 050-505200-001LEDPN:LT-2402-211 061-020000-000Knob20 x15m/m

26、UL94V-0 BLK1 061-314002-000Strain ReliefP/N SB4F-21 061-400014-000RUBBER FOOTID:6.2 OD:11.5 t=2mm BLK1 061-700044-000Mica13x18mm TO-220 No Hole1 063-010012-000BracketP/N:TRK-11 063-321101-000Panel322x105.7x15mm BLK ABS-94V01 063-531808-000Bucket322x105.7x146.5mm BLK (94VO)1 072-010007-000RCA Housing

27、SCJ-1020 2P(G) WHT,RED1CONN1 072-060170-000B.P.B.P.2BP/IP,BP/OP 073-032088-600Heatsink58x32x70mm1 073-050001-000FUSE CLIPP/N:CFFH12061 074-020018-000Rocker SwitchRF1003-BB4-01 074-030002-000TOGGLE SWP/N L1012SW5,SW6 074-300018-000RELAYPN:943-1C-48D1K1 093-105202-300FUSE:UL GSL(2AG)FUSE:2A,250V,5*20m

28、m1F1 Entra Sub Two Downloaded from www.M manuals search engine 24 Integrated Circuit Diagrams OPAMP, QUAD TL074CDR U2, 3 OPAMP, DUAL TL072CDR SO-8, NJM4558M-TE3 U1, 4-6 IR2111 HALF-BRIDGE DRIVER U7 2 Base 3 Collector 1 Emitter 1 2 3 2N2907A, 2N5401 Q1, 19, 23 2 Base 3 Collector 1 Emitter 1 2 3 MPSW0

29、6RLRA, MPSW56RLRAMPQ, MPS2222ARLRA, 2N5551 Q2, 16, 3, 21, 19, 23, 17 MOSFET IRF640 Q18, 22 TIP31C Q4 MMBT3904LTI SOT23, MMBT3906LTI SOT23, DTC114EK SMT3, MMBT5401 LTI, MMBT5551 LTI Q11, 14, 13, 5, 8, 9, 6, 10, 12, 15, 7, 20, 24, 26, 25 BEVEL 1. G 2. D 3. S 123 BCE Entra Sub Two Downloaded from www.M manuals search engine Entra Sub Two Downloaded from www.M manuals search engine Entra Sub Two Downloaded from www.M manuals search engine