Klipsch-RW12-pwr-sm维修电路原理图.pdf

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1、 SERVICE MANUAL Subwoofer Amplifier Model: RW-12 Klipsch Inc. RadioFans.CN 收音机爱 好者资料库 1 CAUTION! Lethal voltages are present and exposed when cover is off of amplifier. Only qualified service technicians should attempt to repair this product. ? ? RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS SPECIFICA

2、TIONS .3 Model: RW-12 .3 THEORY OF OPERATION .4 INPUTS.4 SIGNAL CONDITIONING .4 OUTPUT.4 POWER SUPPLY.4 OTHER FEATURES.5 PARTS LISTS.6 SCHEMATIC DIAGRAMS.10 BLOCK DIAGRAM.13 3 SPECIFICATIONS Model: RW-12 Rated Power Output 340 Watts Continuous into 4 Maximum Power Output 825 Watts(peak) into 4 Frequ

3、ency Band-width 16 - 115Hz THD 1.0% 1 Watt 2.0% Rated Power 5.0% Maximum Power Signal to Noise 98dB or better 60 Hz Hum 15 minutes Low Pass Variable 40 - 120Hz with 24dB/Octave Slope Phase Control Variable 0 - 180 4 THEORY OF OPERATION RW-12 Amplifier INPUTS This amplifier utilizes two RCA connector

4、s(L the high frequency path U2D/U2A and the low frequency path consisting of U3C/U3A/U4D/U4C. U2D is a unity gain buffer stage and U2A is a High Pass filter tuned to approximately 55Hz. U3C is a limiter/compressor, U3A is a unity gain buffer, and U4D and U4C form a Band Pass filter with a bandwidth

5、of approximately 19 - 30Hz. The signals are summed back together at U4B which also provides additional gain. U4A is a variable phase control stage. OUTPUT The Power Amplifier(PA) section of this amplifier is a balanced bridge design. Signal splitter stages U100A and U100B feed pre-amps U100D and U10

6、0C which in turn feed the signal to the linear driver stages Q701-704, and Q707-710. The signal is then applied to the power output MOSFETs Q105/Q106, and Q111/Q112. The maximum output capability of the amplifier is determined primarily by the output transistor type, and the DC rail voltage/current

7、supplied by the power supply. The value of feedback resistors R126and R146 determine the gain of the PA section. Trimmer pots R714 and RP734 establish the DC offsets. POWER SUPPLY The RW-12 utilizes a high current switching power supply with proprietary output controller circuitry. This controller c

8、ircuitry tracks the input signal and continually adjusts the rail voltages to what is needed at the time. This creates a high efficiency amplifier since very little current is flowing when not needed. The power supply also supplies a highly regulated +/- 15Vdc for the op-amps. LIMITERS This amplifie

9、r contains Compressor/Limiter circuits for the purpose of controlling the signal so as not to drive the speakers beyond their physical limits. Op-amp stage U3B and JFET Q1 form an overall Compressor/Limiter which limits the output to the speakers to the rated power level. U3D and JFET Q2 form a Comp

10、ressor/Limiter in the low frequency path limiting the power output only below a specific frequency. In the RW-12 this frequency is approximately 30Hz. 5 OTHER FEATURES AUTO ON/OFF This amplifier features an automatic on/off circuit that allows the user to set up once and forget it. With the power sw

11、itch in the “AUTO” position, a switching circuit consisting of U1D, U5A, & U5B, senses an input signal. From this switching circuit, JFET Q100 on the power amp board is biased OFF which removes the grounding of the signal. For the protection of the speaker when the amplifier is first plugged in, the

12、re is a short delay before JFET Q100is biased OFF. The sensing circuit will bias Q100 ON after the input signal is absent for approximately 15 minutes or more which shorts the signal path to ground. With the power switch in the “ON” position the signal sensing circuit is bypassed and Q100 is always

13、turned OFF. A bi-color LED indicates the status of the amplifier at any given time. The LED will be GREEN when the control circuit is activated and RED when in sleep mode. RW-12 PARTS LIST PARTDESCRIPTIONKLIPSCH PT # POWER SUPPLY BOARD T400XFMR, POWER 100V HC TRAN ETD39 L402IND, CM CHOKE 1.8mH L200

14、IND, POWER 16T 19.2UH W/BOBBIN C430,C431,C433,C434NOT INSTALLED C200,C208CAP, CA 470PF 100V 5% C202CAP, CA 1000PF 100V 10% C204CAP, CA 2200P 100V 10% C205,C206,C209,C407,C421,C422,C424CAP, CA .1UF 50V 20% C207CAP, CA .01UF 100V 20% C413,C414,C435,C436CAP, C 1UF 100V 20% .2LS C417 (120V)CAP, CY1 1500

15、PF 250V 20% .4LS C417 (230V)CAP, CY1 4700PF 250V 20% .4LS C418,C419CAP, E 47UF 50V 20% 5MMLS C427,C428CAP, E 470UF 200V 20% 22X40 C426CAP, E 22UF 50V 20% 5X11 5MMLS C412CAP, E 1000UF 100V 18X40 C415,C416CAP, F .1UF 250V 10% 10MMLS C400,C432CAP, FX .22UF 250V 10% 22MMLS C203CAP, F 6.8UF 250V 5% 27.5M

16、MLS C403,C429CAP, F .1UF 250V 10% 5MMLS D400RECT, 6A 400V BRIDGE PRETRIM D407RECT, 16A 200V CATHODE FEP16DT D203,D408RECT, 1A 100V FAST REC 1N4934 D405,D406RECT, 1A 600V ULTRAFAST MUR160 D200RECT, 15A 200V ULTRA MUR1520 D201RECT, 100mA 75V SIGNAL 1N4148T Z405ZENER, 500MW 16V 5% 1N5246B R400SURGISTOR

17、, 10R 2A CL-110 Z400VARISTOR, 275V 100J .6W Q201TRANS, PNP 40V .6A TO92 2N4403 Q403,Q405TRANS, NPN 40V .6A TO92 2N4401 Q404TRANS, NPN 150V 0.6A 2N5551TR Q401,Q402 MOSFET, IRF740 TO220AB IR ONLY Q200 MOSFET, IRF540 TO220AB IR ONLY R422,R423NOT INSTALLED R426RES, CF 160K 1/4W 5% R401,R414RES, MF 100K

18、1/4W 1% R427,R428RES, MF 100R 1/4W 1% R214RES, MF 47R5 1/4W 1% R412RES, MF 4K75 1/4W 1% R215RES, MF 90R9 1/4W 1% R200RES, MF 16K5 1/4W 1% R416RES, MF 49K9 1/4W 1% R415RES, MF 8K45 1/4W 1% R202RES, MF 8K66 1/4W 1% R413,R421RES, MF 10R 0.6W 1% FLAMEPROOF R209RES, MF 22R 0.6W 1% FLAMEPROOF R201RES, MF

19、2K26 1/4W 1% R206RES, MF 100R 0.6W 1% FLAMEPRF R211RES, MO 330R 2W 5% R425RES, MO 47K 1W 5% 6 RW-12 PARTS LIST PARTDESCRIPTIONKLIPSCH PT # R203,R204,R210RES, MO 0R1 2W 5% 1W BODY U200 BASH CONTROLLER BOARD SUBASSY, BASH CNTRLR MULTI C1CAP, CA 1000PF 100V 10% C6CAP, CA 47PF 50V 10% C3CAP, F 2200PF 10

20、0V 5% 5MMLS D1,D2,D3,D4RECT, 100mA 75V SIGNAL 1N4148T Q2,Q4TRANS, NPN 40V .6A TO92 2N4401 Q1,Q3TRANS, PNP 150V 0.6A 2N5401TR R6,R9RES, CF 10K 1/8W 5% R12RES, MF 2K32 1/4W 1% R2,R3RES, MF 1K00 1/8W 1% R5RES, MF 1K50 1/8W 1% R10,R11RES, MF 475R 1/8W 1% R1RES, MF 6K81 1/8W 1% R4RES, MF 3K65 1/8W 1% U1P

21、WM, 8PIN DIP UC3842N U402 PDC CONTROLLER BOARDSUBASSY, PDC CNTRLR 1014 C11CAP, CA 4700PF 100V 10% C1,C2 CAP, F 3300PF 63V 5% 5MMLS D11RECT, 1A2 60V DIAC HT60TR D12RECT, 100mA 75V SIGNAL 1N4148T D13,D14RECT, 100MA 200V SIGNAL 1N3070 Z1,Z2ZENER, 500MW 15V 5% 1N5245B Q11TRANS, PNP TO92 MPSA92TR R12RES,

22、 MF 1K00 1/4W 1% R1,R4RES, MF 392R 1/4W 1% R2,R3,R5,R6RES, MF 750R 1/4W 1% R11,R13,R14RES, MF 200K 1/4W 1% FEATURE BOARD C1,C107 NOT INSTALLED C124CAP, C 470PF 1KV 10% .2LS TR C126,C128CAP, CA 1000PF 100V 10% C125CAP, CA .1UF 100V 20% C101,C108,C110,C122CAP, CA 100PF 100V NPO 10% C118,C127CAP, E 47U

23、F 50V 20% 5MMLS C123CAP, E 22UF 50V 20% 5X11 5MMLS C129,C130CAP, E 4.7UF 50V 85D 5X11 5MML C102,C109,C113CAP, E 22UF 35V BP 8X11 5MMLS C103,C105,C111,C112,C114,C116,C117CAP, F .1UF 63DC 5% 5MMLS C121 CAP, F .01UF 100V 5% 5MMLS C104,C106,C115CAP, F .047UF 100V 5% 5MMLS D100,D101,D102,D103,D104,D105,D

24、106,D107,D108,D109,D110, D111 RECT, 100mA 75V SIGNAL 1N4148T Z100,Z101,Z102,Z103NOT INSTALLED Z104ZENER, 500MW 7.5V 5% 1N5236B Q1,Q2JFET, N CHAN J108 TO92 R111,R116,R125,R139,R144,R175NOT INSTALLED R178RES, CF 1K0 1/2W 5% R174RES, CF 150R 1/4W 5% R148RES, CF 100K 1/4W 5% 7 RW-12 PARTS LIST PARTDESCR

25、IPTIONKLIPSCH PT # R172RES, CF 470R 1/4W 5% R169RES, CF 150K 1/4W 5% R113,R117,R127,R141,R146,R156RES, ZERO OHM 1/4W R173RES, CF 9M1 1/4W 5% R166,R167RES, MF 1K00 1/4W 1% R107,R108,R109,R120,R121,R129,R137,R157,R158,R177,R179,R184 RES, MF 10K0 1/4W 1% R149RES, MF 100R 1/4W 1% R119,R133,R176RES, MF 2

26、K21 1/4W 1% R101,R104,R128,R182,R183RES, MF 33K2 1/4W 1% R170RES, MF 3K32 1/4W 1% R143RES, MF 5K11 1/4W 1% R138,R140RES, MF 82K5 1/4W 1% R123,R135,R164RES, MF 200R 1/4W 1% R145RES, MF 17K4 1/4W 1% R126RES, MF 25K5 1/4W 1% R147RES, MF 274K 1/4W 1% R110,R112,R114,R115RES, MF 16K2 1/4W 1% R142,R168RES,

27、 MF 8K06 1/4W 1% R118,R122,R134RES, MF 2K80 1/4W 1% R124,R171RES, MF 475K 1/4W 1% R153RES, MF 4K99 1/4W 1% R160,R161,R162RES, MF 200K 1/4W 1% R165RES, MF 1M0 1/4W 1% R159RES, MF 2K55 1/4W 1% R131RES, MF 124K 1/4W 1% R132RES, MF 21K0 1/4W 1% R150,R163RES, MF 237K 1/4W 1% P1POT, B50K DUAL / BRACKET118

28、795 P2POT, B1M SINGLE / BRACKET R103,R106,R180,R181RES, MO 1K 2W 5% TR SMALL BODY R102,R105RES, MO 220R 2W 5% S1SWITCH, SPDT TOGGLE C/W CAP PC118798 U5OPAMP, QUAD 14PIN DIL LM324N U1,U2,U3,U4OPAMP, QUAD 14P DIL TL074CN J2DUAL JACK RCA118792 J1RCA SINGLE PC MT118794 LINEAR BOARD C706,C707,C712,C713CA

29、P, CA 470PF 100V 5% C105,C111CAP, CA 2200P 100V 10% C116,C117,C122,C123,C701,C702CAP, CA .1UF 50V 20% C109,C115CAP, C 10P 50V 5% C118,C119CAP, E 47UF 50V 20% 5MMLS C101CAP, E 22UF 50V 20% 5X11 5MMLS C120,C121CAP, E 100UF 35V 85DEG 5MMLS C100,C104,C110CAP, E 4.7UF 35V BIPOLAR 5X11 C103CAP, F .22UF 63

30、V 5% 5MMLS C102CAP, F .082UF 63VDC 5% 5MMLS D100,D101,D103,D104,D109,D110,D702,D705,D706,D707,D708, D711,D712,D713 RECT, 100mA 75V SIGNAL 1N4148T RT1THERM, PTH9L04BD222TS2F510 Q702,Q708TRANS, PNP 40V .6A TO92 2N4403 Q701,Q707TRANS, NPN 40V .6A TO92 2N4401 8 RW-12 PARTS LIST PARTDESCRIPTIONKLIPSCH PT

31、 # Q704,Q710TRANS, NPN 150V 0.6A 2N5551TR Q703,Q709TRANS, PNP 150V 0.6A 2N5401TR Q105,Q111MOSFET, IRF9540 TO220AB Q106,Q112MOSFET, IRF530 TO220 (IR ONLY) Q100JFET, N-CH J113 TO92 TR R718,R719,R738,R739RES, CF 330R 1/4W 5% R709,R710,R711,R712,R729,R730,R731,R732RES, CF 510R 1/4W 5% R120,R121,R140,R14

32、1RES, MF 1K00 1/4W 1% R102,R103,R104,R105,R106,R107,R127,R128RES, MF 10K0 1/4W 1% R713,R717,R733,R737RES, MF 2K00 1/4W 1% R715,R716,R735,R736RES, MF 3K92 1/4W 1% R101RES, MF 20K0 1/4W 1% R126,R146RES, MF 64K9 1/4W 1% R122,R123,R142,R143RES, MF 22R 0.6W 1% FLAMEPROOF R714,R734POT, 500R 8MM HOR TOP AD

33、J/COVR R111,R112RES, MO 150R 3W 5% 2W BODY R109,R110RES, MO 0R1 2W 5% 1W BODY U100OPAMP, QUAD 14P DIL TL074CN U102VREG, +15V 500MA LM7815CT U103VREG, -15V 500MA LM7915CT PANEL POWER SOCKETIEC/FUSE COMBO SOCKET FUSE (120V)FUSE, T3.15A/250V, 5X20MM, SLOW BLO FUSE (230V)FUSE, T1.6A/250V, 5X20MM, SLOW BLO KNOBSPOT, KNOB CR00-15MB-16H118814 SWITCHROCKER TV5 C/W TERM HIGH LEVEL +SINGLE BINDING POST RED118810 HIGH LEVEL -SINGLE BINDING POST BLK118811 CABLES VOLUME CONTROL FEM-FEM HARNESS 3P 40 LEDFEM-LED R/G 4 2PIN 3M POWERSUPPLY TO LINEAR LINEAR TO FEATURE CNCTR, FEM-FEM HARNESS 8P 9 9