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 3SPECIFICATIONS Model: RW-12 Rated Power Output 340 Watts Continuous into 4 Maximum Power Output 825 Watts(peak) into 4 Freque

3、ncy 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 4THEORY OF OPERATION RW-12 Amplifier INPUTS This amplifier utilizes two RCA connectors(

4、L & R) for LINE LEVEL signal input. A second RCA connector is LFE input. There is also a set of binding post connections for SPEAKER (HIGH) LEVEL input. SIGNAL CONDITIONING All pre-amplification, filtering, and signal conditioning is accomplished using quad op-amp devices U1, U2, U3, and U4. Op-amp

5、U1B, and U1C are gain stages that performs the necessary buffering and isolation of the input signals. The input signal/s from Line In and Speaker In are fed to summing amp U1B. From there the signal passes through the fixed Low Pass filter U1A, and the variable Low Pass filter U2B. Stage U1C buffer

6、s the LFE In signal. The signal from the LFE input bypasses the LowPass filters stages and is summed back into the normal signal path at the volume control stage U2C. From there the signal is split into 2 paths; the high frequency path U2D/U2A and the low frequency path consisting of U3C/U3A/U4D/U4C

7、. 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 of approximately 19 - 30Hz. The signals are summed back together at U4B which also provides

8、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 U100C which in turn feed the signal to the linear driver stages Q701-704, and Q707-710. The sig

9、nal 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 supplied by the power supply. The value of feedback resistors R126and R146 determine the gai

10、n 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 circuitry tracks the input signal and continually adjusts the rail voltages to what is needed

11、 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 amplifier contains Compressor/Limiter circuits for the purpose of controlling the signal so as not t

12、o 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 Compressor/Limiter in the low frequency path limiting the power output only below a specific fre

13、quency. In the RW-12 this frequency is approximately 30Hz. 5OTHER 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 switch in the “AUTO” position, a switching circuit consisting of U1D, U5A, & U5B, senses an inp

14、ut 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, there is a short delay before JFET Q100is biased OFF. The sensing circuit will bias Q100 ON afte

15、r 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 turned OFF. A bi-color LED indicates the status of the amplifier at any given time. The LED w

16、ill be GREEN when the control circuit is activated and RED when in sleep mode. RW-12 PARTS LISTPARTDESCRIPTIONKLIPSCH PT #POWER SUPPLY BOARDT400XFMR, POWER 100V HC TRAN ETD39L402IND, CM CHOKE 1.8mHL200 IND, POWER 16T 19.2UH W/BOBBINC430,C431,C433,C434NOT INSTALLEDC200,C208CAP, CA 470PF 100V 5%C202CA

17、P, 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% .2LSC417 (120V)CAP, CY1 1500PF 250V 20% .4LSC417 (230V)CAP, CY1 4700PF 250V 20% .4LSC418,C419CAP, E 47UF 50V 20% 5MMLSC427,C428CAP, E

18、470UF 200V 20% 22X40C426CAP, E 22UF 50V 20% 5X11 5MMLSC412CAP, E 1000UF 100V 18X40C415,C416CAP, F .1UF 250V 10% 10MMLSC400,C432CAP, FX .22UF 250V 10% 22MMLSC203CAP, F 6.8UF 250V 5% 27.5MMLSC403,C429CAP, F .1UF 250V 10% 5MMLSD400RECT, 6A 400V BRIDGE PRETRIMD407RECT, 16A 200V CATHODE FEP16DTD203,D408R

19、ECT, 1A 100V FAST REC 1N4934D405,D406RECT, 1A 600V ULTRAFAST MUR160D200RECT, 15A 200V ULTRA MUR1520D201RECT, 100mA 75V SIGNAL 1N4148TZ405ZENER, 500MW 16V 5% 1N5246BR400SURGISTOR, 10R 2A CL-110Z400VARISTOR, 275V 100J .6WQ201TRANS, PNP 40V .6A TO92 2N4403Q403,Q405TRANS, NPN 40V .6A TO92 2N4401Q404TRAN

20、S, NPN 150V 0.6A 2N5551TRQ401,Q402 MOSFET, IRF740 TO220AB IR ONLYQ200 MOSFET, IRF540 TO220AB IR ONLYR422,R423NOT INSTALLEDR426RES, CF 160K 1/4W 5%R401,R414RES, MF 100K 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%

21、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% FLAMEPROOFR209RES, MF 22R 0.6W 1% FLAMEPROOFR201RES, MF 2K26 1/4W 1%R206RES, MF 100R 0.6W 1% FLAMEPRFR211RES, MO 330R 2W 5%R425RES, MO 47K 1W 5%6RW-12 PARTS LISTPARTDESCRIPTIONKLIPSCH PT #R203,R204,R

22、210RES, MO 0R1 2W 5% 1W BODYU200 BASH CONTROLLER BOARDSUBASSY, BASH CNTRLR MULTIC1CAP, CA 1000PF 100V 10%C6CAP, CA 47PF 50V 10%C3CAP, F 2200PF 100V 5% 5MMLSD1,D2,D3,D4RECT, 100mA 75V SIGNAL 1N4148TQ2,Q4TRANS, NPN 40V .6A TO92 2N4401Q1,Q3TRANS, PNP 150V 0.6A 2N5401TRR6,R9RES, CF 10K 1/8W 5%R12RES, MF

23、 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%U1PWM, 8PIN DIP UC3842NU402 PDC CONTROLLER BOARDSUBASSY, PDC CNTRLR 1014C11CAP, CA 4700PF 100V 10%C1,C2 CAP, F 3300PF 63V 5% 5MMLSD11RECT, 1A2 60V DIAC HT60TRD12RECT, 10

24、0mA 75V SIGNAL 1N4148TD13,D14RECT, 100MA 200V SIGNAL 1N3070Z1,Z2ZENER, 500MW 15V 5% 1N5245BQ11TRANS, PNP TO92 MPSA92TRR12RES, 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 BOARDC1,C107NOT INSTALLEDC124CAP, C 470PF 1KV 10% .2LS TRC126,C1

25、28CAP, CA 1000PF 100V 10%C125CAP, CA .1UF 100V 20%C101,C108,C110,C122CAP, CA 100PF 100V NPO 10%C118,C127CAP, E 47UF 50V 20% 5MMLSC123CAP, E 22UF 50V 20% 5X11 5MMLSC129,C130CAP, E 4.7UF 50V 85D 5X11 5MMLC102,C109,C113CAP, E 22UF 35V BP 8X11 5MMLSC103,C105,C111,C112,C114,C116,C117CAP, F .1UF 63DC 5% 5

26、MMLSC121 CAP, F .01UF 100V 5% 5MMLSC104,C106,C115CAP, F .047UF 100V 5% 5MMLSD100,D101,D102,D103,D104,D105,D106,D107,D108,D109,D110, D111RECT, 100mA 75V SIGNAL 1N4148TZ100,Z101,Z102,Z103NOT INSTALLEDZ104ZENER, 500MW 7.5V 5% 1N5236BQ1,Q2JFET, N CHAN J108 TO92R111,R116,R125,R139,R144,R175NOT INSTALLEDR

27、178RES, CF 1K0 1/2W 5%R174RES, CF 150R 1/4W 5%R148RES, CF 100K 1/4W 5%7RW-12 PARTS LISTPARTDESCRIPTIONKLIPSCH PT #R172RES, CF 470R 1/4W 5%R169RES, CF 150K 1/4W 5%R113,R117,R127,R141,R146,R156RES, ZERO OHM 1/4WR173RES, CF 9M1 1/4W 5%R166,R167RES, MF 1K00 1/4W 1%R107,R108,R109,R120,R121,R129,R137,R157

28、,R158,R177,R179,R184 RES, MF 10K0 1/4W 1%R149RES, MF 100R 1/4W 1%R119,R133,R176RES, MF 2K21 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

29、1%R147RES, MF 274K 1/4W 1%R110,R112,R114,R115RES, MF 16K2 1/4W 1%R142,R168RES, 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 21

30、K0 1/4W 1%R150,R163RES, MF 237K 1/4W 1%P1POT, B50K DUAL / BRACKET118795P2POT, B1M SINGLE / BRACKETR103,R106,R180,R181RES, MO 1K 2W 5% TR SMALL BODYR102,R105RES, MO 220R 2W 5%S1SWITCH, SPDT TOGGLE C/W CAP PC118798U5OPAMP, QUAD 14PIN DIL LM324NU1,U2,U3,U4OPAMP, QUAD 14P DIL TL074CNJ2DUAL JACK RCA11879

31、2J1RCA SINGLE PC MT118794LINEAR BOARDC706,C707,C712,C713CAP, 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% 5MMLSC101CAP, E 22UF 50V 20% 5X11 5MMLSC120,C121CAP, E 100UF 35V 85DEG 5MMLSC100,C104,C1

32、10CAP, E 4.7UF 35V BIPOLAR 5X11C103CAP, F .22UF 63V 5% 5MMLSC102CAP, F .082UF 63VDC 5% 5MMLSD100,D101,D103,D104,D109,D110,D702,D705,D706,D707,D708, D711,D712,D713RECT, 100mA 75V SIGNAL 1N4148TRT1THERM, PTH9L04BD222TS2F510Q702,Q708TRANS, PNP 40V .6A TO92 2N4403Q701,Q707TRANS, NPN 40V .6A TO92 2N44018

33、RW-12 PARTS LISTPARTDESCRIPTIONKLIPSCH PT #Q704,Q710TRANS, NPN 150V 0.6A 2N5551TRQ703,Q709TRANS, PNP 150V 0.6A 2N5401TRQ105,Q111MOSFET, IRF9540 TO220ABQ106,Q112MOSFET, IRF530 TO220 (IR ONLY)Q100JFET, N-CH J113 TO92 TRR718,R719,R738,R739RES, CF 330R 1/4W 5%R709,R710,R711,R712,R729,R730,R731,R732RES,

34、CF 510R 1/4W 5%R120,R121,R140,R141RES, 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% FLAMEPROOFR714,R7

35、34POT, 500R 8MM HOR TOP ADJ/COVRR111,R112RES, MO 150R 3W 5% 2W BODYR109,R110RES, MO 0R1 2W 5% 1W BODYU100OPAMP, QUAD 14P DIL TL074CNU102VREG, +15V 500MA LM7815CTU103VREG, -15V 500MA LM7915CTPANELPOWER SOCKETIEC/FUSE COMBO SOCKETFUSE (120V)FUSE, T3.15A/250V, 5X20MM, SLOW BLOFUSE (230V)FUSE, T1.6A/250V, 5X20MM, SLOW BLOKNOBSPOT, KNOB CR00-15MB-16H118814SWITCHROCKER TV5 C/W TERMHIGH LEVEL +SINGLE BINDING POST RED118810HIGH LEVEL -SINGLE BINDING POST BLK118811CABLESVOLUME CONTROL FEM-FEM HARNESS 3P 40LEDFEM-LED R/G 4 2PIN 3MPOWERSUPPLY TO LINEAR LINEAR TO FEATURECNCTR, FEM-FEM HARNESS 8P 99