Infinity-CascadeTwelve-ps-sm维修电路原理图.pdf

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1、 Cascade Series Cascade Series Model Twelve Subwoofer Model Twelve Subwoofer SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 Rev1 8/2006 RadioFans.CN 收音机爱 好者资料库 - CONTENTS - BASIC SPECIFICATIONS .1 DETAILED SPECIFICATIONS.2 PACKAGING .4 CONTROLS AND CONNECTIONS.

2、5 OPERATION.7 EXPLODED VIEW.8 TEST SET UP AND PROCEDURE.9 BLOCK DIAGRAM.10 TROUBLESHOOTING FLOW CHART.11 ELECTRICAL PARTS LIST (120v) .12 PCB DRAWINGS.18 SEMICONDUCTOR PINOUTS.22 SCHEMATICS (120v).23 Basic Specifications Cascade Model Twelve Powered Subwoofer Frequency Response 32Hz 150Hz (3dB) 28Hz

3、 150Hz (6dB) Maximum Amplifier Output 300 watts RMS (20Hz 150Hz, no more than 0.1% THD) Crossover Frequencies 50Hz 150Hz, continuously variable or LFE Drivers 10 (250mm) MMD, Dual 10 (250mm) MMD passive radiators Dimensions (H x W x D) 20 x 15 x 13-7/8 (508mm x 381mm x 352mm) Weight 42 lb (19kg) Inf

4、inity continually strives to update and improve existing products, as well as create new ones. The specifications and construction details in this and related Infinity publications are therefore subject to change without notice. Model Twelve Model Twelve Cascade Cascade 1 RadioFans.CN 收音机爱 好者资料库 Cas

5、cade Model Twelve subwoofer 300 W Powered Sub/ Plate Amp LINE VOLTAGEYes/NoHi/Lo LineNom.UnitNotes NA 120vac/60HzYes108-132120VrmsNormal Operation EU 230vac/50-60HzYes207-264230VrmsNormal operation, MOMS required ParameterSpecificationUnit QA Test LimitsConditionsNotes Amp Section Type (Class AB, D,

6、 other)D- Load Impedance (speaker)4OhmsNominalZ-curve required Rated Output Power300WattsRegulated 120 V line THD Rated Power1%22k filter, 50Hz300W THD 1 Watt0.5%22k filter, 50Hz DC OffsetundefinedmV-DC 15measured at 50 Hz Input Sensitivity Line Input260 mVmVrms300 W 50Hz1 input driven Signal to Noi

7、se SNR-A-Weighted100dBArelative to rated powerA-Weighting filter SNR-unweighted70dBrrelative to rated power22k filter SNR rel. 1W-unweighted60dBrrelative to 1W Output22k filter Residual Noise Floor2mVrmsVolume max, using RMS reading DMM/VOM (or A/P) Residual Noise Floor1mVrms(max)Volume max, w/ A/P

8、Swept Bandpass Measurement (Line freq.+ harmonics) Input Impedance Line Input6.5 kohmsNominal Active Filters Low Pass (fixed or variable)VARIABLE- Frequency50 - 150 Hz Slope24dB/Octave QButterworth - High Pass (HPF)FIXED- Frequency31Hz Slope12dB/Octave Q1.5 - Line Out (BUFFERED)STEREO- Unity Gain Fr

9、iend CircuitFIXED- Frequency60Hznotch filter Slope6dB/Octave Q2.5 - Special filterRABOS- Switches Main Power ON/OFFYES- Typerocker-Located on amp plateTV-5 Rabos ON/OFFYES- Typemini togle-Located on amp plate Line/Spkr Input Select SwitchNO- Type- Polarity SwitchYES-Off: 0; On: 180 Typemini togle -L

10、ocated on amp plate Limiter (yes/no)YEScompressor and limiter THD at Max. Output Powerless than 2%Maximum Output PowerMaximum THD as a result of limiting. Output Level Control Volume Control PotYES-gain control mounted on amp panel Taper (lin/log)log A taper- minimum settingno output Input/Output Co

11、nfiguration Line InStereo-RCA phono jack, gold plated LFE InYES-Shared with R Line In jack Line Outputs (L,R)YES- Buffered all-pass line level L Standby: red Transients/Pops ATO Transient5mV-peak Speaker Outputs Turn-on Transient30mV-peak Speaker OutputsAC Line cycled from OFF to ON Turn-off Transie

12、nt30mV-peak Speaker OutputsAC Line cycled from ON to OFF Efficiency Stand-by Input Power10Wattstyp. nom. line voltage AC Power Cons.1W12Wattstyp. nom. line voltage Power Cons.rated power473Wattstyp. nom. line voltageInput power measured is REAL Watts, not VA Efficiency63%typ. nom. line voltage Prote

13、ction Short Circuit Protection YES-Direct short at output Thermal Protection YES- threshold 65 deg. C at panel DC Offset ProtectionYES-DC present at Speaker Out leadsRelay for driver/fire protection Line Fuse Rating ( 120 V )3.15AmpsType ADL or MDL Fuse holder on inside surface of amp panel Model Tw

14、elve Model Twelve Cascade Cascade 3 4 Model Twelve Model Twelve Cascade Cascade Line In Line Out 150 Max Level Crossover Hz 50 Min LFE Input Phase Normal OffOn LFE Green: On Red: Standby Model Twelve Power 0 1 2 3 4 5 6 7 8 B A 9 Cascade Model Twelve Rear Panel CONTROLS ANDCONNECTIONS Power Switch L

15、ine-Level Outputs Line-Level Inputs Power Indicator Crossover Adjustment Subwoofer Level (Volume) Control Normal/LFE Selector Phase Switch Bass Optimization Controls (see page 5) Bass Optimization System Selector Center-Frequency Adjustment Bass Optimization System Level Adjustment Bass Optimization

16、 System Bandwidth Adjustment Cascade 12 OM 9/21/05 5:03 PM Page 5 Model Twelve Model Twelve Cascade Cascade 5 Cascade Model Twelve CONNECTIONS If you have a Dolby* Digital or DTSreceiver/processor with a low-frequency-effects (LFE) output: Set Normal/LFE Switch to LFE. NOTE:In this case,you do not n

17、eed to use a Y connector.Simply connect the LFE output on your receiver/processor to either the left or right input on the subwoofer. SUBWOOFER OR LFE OUTPUT Line In Line Out 150 Max Level Crossover Hz 50 Min LFE Input Phase Normal OffOn LFE Green:On Red:Standby Model Twelve The Cascade Model Twelve

18、 also includes a set of line outputs.These outputs allow you to “daisy-chain” one Model Twelve to multiple Model Twelve subwoofers.Simply connect the first subwoofer as described above and then run a subwoofer cable from the line output(s) to the line input(s) on the next sub. NOTE:This line output

19、is before the R.A.B.O.S.circuit.Each subwoofers R.A.B.O.S.controls must be individually adjusted during the R.A.B.O.S.setup. If your receiver/processor has subwoofer outputs for the left and right channels: Set Normal/LFE Switch to Normal. NOTE:Some receivers have a single subwoofer output (do not c

20、onfuse this with a single LFE output as described to the left). In that case,it is recommended that you use a Y connector (not included) to maximize performance. Line In Line Out 150 Max Level Crossover Hz 50 Min LFE Input Phase Normal OffOn LFE Green:On Red:Standby Model Twelve SUBWOOFER OR LFE OUT

21、PUT Line In Line Out LFE Input Green: On Red: Standby Model Twelve Line In Line Out LFE Input Green: On Red: Standby Model Twelve Line In Line Out LFE Input Green: On Red: Standby Model Twelve Line In Line Out LFE Input Green: On Red: Standby Model Twelve OR Cascade 12 OM 9/21/05 5:03 PM Page 6 Mode

22、l Twelve Model Twelve Cascade Cascade 6 Cascade Model Twelve Power On Plug your subwoofersAC cord into a wall outlet.Do not use the outlets on the back of the receiver. Initially set the Subwoofer Level (Volume) Control to the “min”position. Turn on your sub by pressing the Power Switch on the rear

23、panel. Auto On/Standby With the Power Switch in the ON position,the Power Indicator LED will remain backlit in red or green to indicate the On/Standby mode of the subwoofer. RED = STANDBY (No signal detected,Amp Off) GREEN = ON (Signal detected,Amp On) The subwoofer will automatically enter the Stan

24、dby mode after approximately 10 minutes when no signal is detected from your system.The subwoofer will then power ON instantly when a signal is detected.During periods of normal use,the Power Switch can be left on.You may turn off the Power Switch for extended periods of nonoperation,e.g.,when you a

25、re away on vacation. Adjust Gain Turn on your entire audio system and start a CD or movie soundtrack at a moderate level.Turn up the Subwoofer Level (Volume) Control about half way.If no sound emanates from the subwoofer,check the AC-line cord and input cables. Are the connectors on the cables makin

26、g proper contact? Is the AC plug connected to a “live”receptacle? Has the Power Switch been pressed to the “On”position? Once you have confirmed that the subwoofer is active,proceed by playing a CD,record or cassette.Use a selection that has ample bass information. Set the overall volume control of

27、the preamplifier or stereo to a comfortable level. Adjust the Subwoofer Level (Volume) Control until you obtain a pleasing blend of bass.Bass response should not overpower the room but rather be adjusted so there is a harmonious blend across the entire musical range.Many users have a tendency to set

28、 the subwoofer volume too loud, adhering to the belief that a subwoofer is there to produce lots of bass.This is not entirely true.A subwoofer is there to enhance bass,extending the response of the entire system so the bass can be felt as well as heard.However,overall balance must be maintained or t

29、he music will not sound natural.An experienced listener will set the volume of the subwoofer so its impact on bass response is always there but never obtrusive. OPERATION Crossover Adjustments NOTE: This control will have no effect if the Normal/LFE Selector Switch is set to “LFE.”If you have a Dolb

30、y Digital or DTS processor/receiver,the Crossover Frequency is set by the processor/receiver.Consult your owners manual to learn how to view or change this setting. The Crossover Adjustment Control determines the highest frequency at which the subwoofer reproduces sounds.If your main speakers can co

31、mfortably reproduce some low-frequency sounds, set this control to a lower frequency setting, between 50Hz and 100Hz.This will concentrate the subwoofers efforts on the ultradeep bass sounds required by todays films and music.If you are using smaller bookshelf speakers that do not extend to the lowe

32、r bass frequencies,set the Crossover Adjustment Control to a higher setting,between 120Hz and 150Hz. Phase Control The Phase Switch determines whether the subwoofer speakers piston-like action moves in and out with the main speakers,0,or opposite the main speakers,180.Proper phase adjustment depends

33、 on several variables such as room size, subwoofer placement and listener position.Adjust the phase switch to maximize bass output at the listening position. Cascade 12 OM 9/21/05 5:03 PM Page 7 Model Twelve Model Twelve Cascade Cascade 7 Model Twelve Model Twelve Cascade Cascade 8 Cascade Model Twe

34、lve TEST PROCEDURE The operation of the Cascade Model Twelve subwoofer, and the proper settings for the Room Adaptive Bass Optimization System, or R.A.B.O.S., is thoroughly covered in the Owners guide, part# 406-000-05338-E. For service purposes, the R.A.B.O.S. system is canceled when all three fron

35、t panel controls (F) (L) (W) are turned fully CW (Clockwise), or if the R.A.B.O.S. On/Off switch is OFF. The only other control of concern is the Main Level Control on the front panel, which operates like a traditional potentiometer. Equipment needed: Function/signal generator/sweep generator Integr

36、ated Amplifier Multimeter RCA cables; Speaker cables General Unit Function (UUT = Unit Under Test) Switch/Controls: MAIN LEVEL control full Counterclockwise (Min) CROSSOVER (Hz) Full Clockwise (150) R.A.B.O.S. On/Off switch OFF PHASE switch - either position (3) R.A.B.O.S. controls do not matter 1)

37、From the signal generator, connect one line level (RCA) cable to the Line In jacks (L/R) on the UUT. Use a Y- cable from a mono source if necessary to connect to both inputs. 2) Turn on generator; adjust to 150mV, 50 Hz. 3) Plug AC power cord in UUT, turn power switch ON. 4) LED should be ON (facepl

38、ate). Turn up LEVEL control to full Clockwise (Max). 5) LED should be Green; Bass response should be heard and felt from woofer at bottom of cabinet. 6) Turn LEVEL control full Counterclockwise (Min). Turn power switch OFF. Sweep Function 1) Follow steps 1-5 above, using a sweep generator as a signa

39、l source adjust the generator to 100mV, 50 Hz. 2) Sweep generator from 20Hz to 300Hz. Listen for any rattles, clicks, buzzes or any other noises. If any unusual noises are heard, test woofer according to the instructions below. Driver Function 1) Remove woofer from the enclosure. Check DC resistance

40、 of woofer; it should be 3.4 10%, 2) Connect a pair of speaker cables to woofer terminals. Cables should be connected to an integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level output is 6.0V. 3) Sweep generator from 20Hz to 1kHz. Listen to driver for an

41、y rubbing, buzzing, or other unusual noises. Model Twelve Model Twelve Cascade Cascade 9 BLOCK DIAGRAM Model Twelve Model Twelve Cascade Cascade 10 MODEL12 Test Flow Chart yes no no yes yes no yes no yes no yes no yes no yes no no yes yes no 說明:以上推斷是在操作接線正確,測試 方法正確,儀器設備正常的前提下進行的. Start Dc voltage ch

42、eck Vcc,15V OK Check transformer C168,C169,D123, D124,C170 Power on check LED red Ac cord, Transformer. OK Listening test OK The Amp assy ok END Test phase sw,low pass sw rabos vr Check sw103,102, R158,163,177 ect Model Twelve Model Twelve Cascade Cascade 11 Cascade Model Twelve Electrical Parts Lis

43、t 120v Part NumberDescriptionQtyReference Designator MAIN/POWER SUPPY PCB Resistors 110-16102j26-e CARBON RESISTOR 1K 1/6W 5% CF 26mm (RoHS) 3R210,R239,R264 110-16103j26-e CARBON RESISTOR 10K 1/6W 5% CF 26mm (RoHS) 9R216,R227,R229,R230,R231,R232,R233,R260,R261 110-16153j26-e CARBON RESISTOR 15K 1/6W

44、 5% CF 26mm (RoHS) 2R247,R249 110-16182j26-e CARBON RESISTOR 1.8K 1/6W 5% CF 26mm (RoHS) 1R248 110-16222j26-e CARBON RESISTOR 2.2K 1/6W 5% CF 26mm (RoHS) 2R242,R245 110-16223j26-e CARBON RESISTOR 22K 1/6W 5% CF 26mm (RoHS) 3R218,R220,R223 110-16274j26-e CARBON RESISTOR 270K 1/6W 5% CF 26mm (RoHS) 1R

45、240 110-16333j26-e CARBON RESISTOR 33K 1/6W 5% CF 26mm (RoHS) 1R211 110-16391j26-e CARBON RESISTOR 390 1/6W CF 26mm (RoHS) 2R243,R246 110-16472j26-e CARBON RESISTOR 4.7K 1/6W 5% CF 26mm (RoHS) 4R213,R217,R219,R222 110-16473j26-e CARBON RESISTOR 47K 1/6W 5% CF 26mm (RoHS) 1R221 110-16683j26-e CARBON

46、RESISTOR 68K 1/6W 5% CF 26mm (RoHS) 1R212 112-14101j26-e FUSE RESISTOR 1/4W 100ohm 5%(RoHS) 2R241,R244 116-141r00j26x-e MTL FILM RESISTOR 1.00 1/4W 5% MO 26mm (RoHS) 2R255,R256 116-161002f26-e MTL FILM RESISTOR 10K 1/6W 1% MF 26mm (RoHS) 2R234,R235 116-161301f26-e MTL FILM RESISTOR1.30K 1/6W MF 26mm (RoHS) 3R226,R228,R236 116-161692f26-e MTL FILM RESISTOR16.9K 1/6W MF 26mm (RoHS)