Infinity-IL50LR-spk-sm 维修电路原理图.pdf

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1、Interlude SeriesIL50 L/RPowered LoudspeakerService ManualInfinity Systems, Inc250 Crossways Park Dr.Woodbury, New York 11797REV10 10/2005 RadioFans.CN 收音机爱 好者资料库IL50 CONTENTS SPECIFICATIONS .3 DETAILED SPECIFICATIONS .4 CONTROLS and CONNECTIONS .6 OPERATION.10 BASS OPTIMIZATION SYSTEM.10 MECHANICAL

2、PARTS LIST.12 EXPLODED VIEW .13 EXPLODED VIEW OF AMPLIFIER.14 SERVICE TIPS.15 SERVICE BULLETIN INF2002-02 .16 SERVICE BULLETIN INF2001-04 .17 SERVICE BULLETIN INF2002-05 .19 TECH TIP INFTT2003-03.24 TEST SET UP PROCEDURE.25 IL50 ADJUST BIAS PROCEDURE.26 PACKAGING .27 PRINTED CIRCUIT BOARD DIAGRAMS.2

3、8 ELECTRICAL PARTS LIST (120v).34 INTEGRATED CIRCUIT DIAGRAMS 40 HI-PASS CROSSOVER SCHEMATIC.41 IL50 SCHEMATICS.42 2RadioFans.CN 收音机爱 好者资料库IL50 L/R3SpecificationsIL50 L/R Frequency Response: 32Hz - 22,000Hz (3dB)Recommended Amplifier Power Range 15-150 watts*Subwoofer Amplifier Output:250 watts (In

4、to 8 from 20 Hz - 100Hzwith no more than 0.1% THD)Sensitivity:88dB (2.83V 1 meter)Nominal Impedance:8Crossover Frequencies:150Hz; 2500Hz, 24dB/octave,Low-Frequency Driver:10 C.M.M.D., magnetically shieldedMid-Bass Driver:6-1/2” C.M.M.D., magnetically shieldedHigh-Frequency Driver:1” C.M.M.D., magnet

5、ically shieldedDimensions (H x W x D):42 x 8-3/4 x 14-1/2(1067mm x 222mm x 368mm)Weight:60 lb (27kg)* The maximum recommended amplifier power rating will ensure proper system headroom to allowfor occasional peaks. We do not recommend sustained operation at these maximum power levels.Detailed Specifi

6、cationsIL50 L/R4IL50 L/R5Detailed Specifications (Cont.)IL50 L/R6Controls and Connections (Cont.)IL50 L/R7Controls and ConnectionsIL50 L/R8Controls and Connections (Cont.)IL50 L/R9Controls and Connections (Cont.)IL50 L/R10Operation/Bass Optimization SystemTMIL50 L/R11Bass Optimization SystemTM (Cont

7、.)NOTE:It is important that you make the same adjustments to both loudspeakers.Set the Bass Optimization System Bandwidth adjustments to a middle position (10 clicks from afully clockwise position) and set Level adjustments for a 6dB (8 clicks from a fully clockwiseposition). Then,while the music is

8、 playing,sit in your favorite chair and have somebody else slowlyadjust the Frequency controls from fully clockwise to fully counter-clockwise. At a certainfrequency, you should hear the problem lessen and the overall bass performance improve. Whenyou are satisfied that you have found the best frequ

9、ency, have your assistant vary the Levelsslowly up and down until you have maximized the improvement.If you have really keen ears, youcan also have the Bandwidth controls adjusted for maximum benefit.While the Bass Optimization System allows the listener to fine-tune the bass response to sound besti

10、n a particular room,some listeners dont have the skill or desire to adjust their system by ear. Inorder to facilitate quicker and more accurate results, Infinity has developed an optional test andmeasurement kit that allows the user to perform a series of measurements and aids him/her inproperly set

11、ting the Bass Optimization System controls. With the addition of this kit,the BassOptimization System becomes truly room-adaptive.The kit consists of the following:a test CD, a sound-level meter that is specifically calibrated for lowfrequencies, and something we call a “Q-Finder, ”a device to help

12、find the width of the measuredcurve and, finally, a measurement template. It works as follows. The listener plays the tones fromthe test CD and records the relative output level of each test tone, using the sound-level meter, onthe provided measurement template. After all the tones are complete, the

13、 template contains aresponse curve for the frequencies below 100Hz. The user simply notes the frequency of the largestbass peak,calculates the correct amount of attenuation,and uses the “Q-Finder” to determine thewidth of the curve. These three values are dialed into the Bass Optimization System con

14、trols locatedon the speaker.The entire process takes less than twenty minutes.If your dealer does not stock the Bass Optimization System test and measurement kit,you maypurchase it directly from Infinity. U.S. residents can visit our Web site at orcall 1-800-553-3332.Canadian residents should contac

15、t their dealer or call 1-800-567-3275.Ask for Infinity part number 335852-002.111091011IL50 L/R12IL50 L/R Mechanical Parts List* On 9/1/2000 a new replacement port tube was included with the IL50. Supplied part number reflects the new part. In addition,modified IL50 product w/ new port tube may be i

16、dentified by the following serial number prefixes, which appears on the amplifierfaceplate and the carton barcode label:IL50BLKL- NM0825-01001 and aboveIL50MPLL- NM0826-01001 and aboveIL50CHL- NM0827-01001 and aboveIL50BLKR- NM0828-01001 and aboveIL50MPLR- NM0829-01001 and aboveIL50CHR- NM0830-01001

17、 and aboveNOT FOR SALEIL50 L/R13Exploded ViewCABINET,IL50(NOT FOR SALE)PORT TUBE,336805-001See page 12SCREW, (10)#8X.75 PB PPH BLK900101-012SCREW, (6)#8X.75 PB PPH BLK900101-012SCREW, (2)#8X.75 PB PPH BLK900101-012SCREW, (3)#8X1 PB PPH BLK900101-016SCREW, (3)#8X.75 PB PPH BLK900101-012SCREW, (4)#6X.

18、75 PB PPH BLK903401-012SCREW, (4)6-19X.375 MS PPH BLK905401-006SCREW, (6)#6X.75 PB PPH BLK903401-012SCREW, (4)8-18X.5ZINK MS PPH BLK905802-008MID RANGETRANSDUCER,335741-001SCREW, (6)#6X.75 PB PPH BLK903401-012GRILLE CUP, (6)333249-003GRILLE CUP, (3)333249-003GRILLE CUP, (7)333249-003BAFFLE,336163-00

19、1, R336163-002, LVOLUME CONTROLASSY w/CABLE,336250-001, R336250-002, L(ROTATED)NETWORK,336476-001SPIKE (4),331360-001WOOFER,335808-001TRIMRING,336162-001BUMP-ON (4),330104-001GRILLE, BLACK, LEFT 335612-072GRILLE, BLACK, RIGHT 335612-071GRILLE, MIDNIGHT BLUE, LEFT 335612-052GRILLE, MIDNIGHT BLUE, RIG

20、HT 335612-051GRILLE, RICH BURGUNDY, LEFT 335612-062GRILLE, RICH BURGUNDY, RIGHT 335612-061GRILLE, GRAY, LEFT 335612-042GRILLE, GRAY, RIGHT 335612-041AMPLIFIER,NOT FOR SALETWEETER,335225-002PEDESTAL,336256-00100269GRILLE, WOOFER,Part of Set - See Upper Grille OptionsIL50 L/R14Exploded View of Amplifi

21、er00277Rear Plastic Cover930050High LevelBinding Posts-JC0104Power Cord, 15 FT.WI0043Feature PCBLinear PCBRABOS PCBPower SupplyPCBEMI FilterPCBIL50 L/R15Service TipsService Bulletin Service Bulletin INF2002-02 - February 2002Warranty labor rate: MINOR repair To:All Infinity Service Centers Model: In

22、terlude IL50, IL100s Subject: No OutputIn the event you receive an Interlude IL50 or IL100s subwoofer with the complaint: “There is no output,and the LED on the volume control does not light, red or green”, check the items listed below:Check the 3A line fuse to make sure its not open. If open, repla

23、ce with a 3A MDL (.25 x 1.25) slo-blo fuse,Infinity part# 80126.Locate R22 in the power supply section, as shown below.If value of R22 is not 100k ohms ? ?5%, then replace R22 with a 1/2 Watt 100k ohm ? ?5%, resistor.1. Remove the grille. Lay the subwoofer on its face on a padded surface, amplifier

24、facing upwards.2. Remove the 10 Phillips screws around the outer perimeter of the amplifier faceplate; remove the amplifierfrom the cabinet.3. Remove two Phillips screws on the faceplate to remove the rear plastic cover; they are (1) the screwdirectly above the Bass Optimization switch and (1) to th

25、e left of the power cord receptacle; remove theamp cover.4. Locate the power supply section and R22 from the illustrations below. R22 can be checked in-circuit andshould be 100k ohms ?5%. If it is any other value, or open, replace with Infinity part# RC0082.5. Reassemble the amplifier, rear cover, r

26、eplace the amplifier in the cabinet and test the subwoofer. IL50IL50 16 Service Bulletin Service Bulletin INF2001-04 Rev2 May 2005 Warranty labor rate: MINOR repair To: All Infinity Service Centers Model: Interlude and Intermezzo IL50, IL60, IL100s, IL120s, IM1.2s, IM4.1t Subject: No Output In the e

27、vent you receive an Interlude or Intermezzo loudspeaker with the complaint: “There is no output, and the LED on the volume control does not light, red or green”, check the item listed below: 1) Check the line fuse to make sure its not damaged. Replace if necessary IL50, IL100s 3A Infinity part# FS00

28、22 IL60, IL120s 4A Infinity part# FS0026 IM1.2s, IM4.1t 6A Infinity part# FS0027 If the fuse is intact, or the unit still does not function, check the power supply portion of the amplifier circuit, described below: 2) Refer to the Exploded view page for detailed instructions on amplifer removal from

29、 the enclosure. 3) Remove all connectors and screws necessary to detach the Power Supply PCB from the main chassis heatsink. Squeeze the heads of the plastic standoffs with long-nosed pliers to detach the PCB from the heatsink. 4) Refer to the illustration on page 2. Check the DC resistance of follo

30、wing parts, in circuit, with a DMM: * The two transistor leads should be shorted together before these measurements are taken; the DMM leads will “charge” the circuit and the value may change, but should match the values above. Very low values that do not change indicate a shorted MOSFET. 5) Replace

31、 any defective parts above that show measured values lower than normal. 6) Reconnect J505 or J6 multicolor ribbon cable connector; remount the Power supply PCB; reconnect J501/502 or J4/J5 black/red Faston connectors. 7) All models except IM1.2S, IM4.1t: temporarily DO NOT connect the pair of black/

32、red “CD ” leads on the linear PCB). Isolate the ends so they are not touching each other, or any conductive material. (For models IM1.2S, IM4.1t procedure is finished; replace amplifier). IRF740 MOSFETS Q501, Q502 Infinity part# QM0055 D to S or S to D G to S or S to G D to G or G to D Should measur

33、e 28K ohms* Should measure 400 ohms Should measure 28K ohms* 22 Ohm 0.6W Resistors R506, R503 Infinity part# RM0340 Should measure 22 ohms 1% IL120s IL60 422 Ohm 1/4 watt Resistors R505, R502 Infinity part# RM0397 Should measure 422 ohms 1% IRF740 MOSFETS Q4, Q5 Infinity part# QM0055 D to S or S to

34、D G to S or S to G D to G or G to D Should measure 28K ohms* Should measure 400 ohms Should measure 28K ohms* 22 Ohm 0.6W Resistors R17, R20 Infinity part# RM0340 Should measure 22 ohms 1% IL50 IL100s 475 Ohm 1/4 watt Resistors R16, R19 Infinity part# RM0075 Should measure 475 ohms 1% IRF740 MOSFETS

35、 Q403,404,406,407 Infinity part# QM0055 D to S or S to D G to S or S to G D to G or G to D Should measure 28K ohms* Should measure 400 ohms Should measure 28K ohms* 22 Ohm 0.6W Resistors R407,410,414,417 Infinity part# RM0340 Should measure 22 ohms 1% IM1.2s IM4.1t 365 Ohm 1/4 watt Resistor R408,411

36、,415,418 Infinity part# RM0072 Should measure 365 ohms 1% IL50IL50 17 8) Connect the subwoofer amplifier to an AC power source; turn the unit ON. Measure the DC voltage at the “CD ” wires; it should be 10-20 volts. 9) If it is 25 volts or greater, turn the amplifier OFF, disconnect from the power so

37、urce, and replace: IL120S, IL60: Q504,Q507 IRF640 on the Power Supply PCB, Infinity part# QM0015. IL50, IL100s: Q1 IRF540 on the Power Supply PCB, Infinity part# QM0020. 10) If the voltage is normal, turn the amplifier OFF, disconnect from the power source, and reconnect the “CD” leads. 11) Finish r

38、eassembling the amplifier, remount the heatsink, replace the amplifier in the cabinet and test the subwoofer. IL50IL50 18 Service Bulletin Service Bulletin INF2002-05 Rev5 - October 2005 Warranty labor rate: MAJOR repair To: All Infinity Service Centers Model: Interlude IL50 Subject: Reliability Upg

39、rade PURPOSE: Improve reliability of the IL50 amplifier; this procedure should be followed for every unit that has to be serviced, for any reason. PLEASE READ ENTIRE PROCEDURE FIRST BEFORE ORDERING PARTS OR SERVICING THE AMPLIFIER. SOME PART REPLACEMENTS ARE AS NEEDED BASIS ONLY; SEE SHADED AREAS IN

40、 CHART BELOW. IR = Brand International Rectifier A/R = As required Infinity Part Number Ref. Designator Description Qty Comment QM0061 Q1 MOSFET, IRF540 TO220AB IR ONLY 1 As Needed QM0055 Q4,Q5 MOSFET, IRF740 TO220AB IR ONLY 2 As Needed TS0016 TUBING, #5 BLACK CUT TO .3 A/R DR0091 D1 RECT, 15A 200V

41、MUR1540 MOTOROLA ONLY 1 As Needed 810066 HEATSINK, FET CLIP, CLIP ON - NO SCREW 2 Used with heatsink 810156 on U2,U3 810156 HEATSINK, LINEAR VOLTAGE REG 1 810157 HEATSINK, FET SEC BLACK 1 Replaces 810091 810158 HEATSINK, FET PRIMARY BLACK 1 Replaces 810092 810056 HEATSINK, FET CLIP .9 x .5 x .2 1 Us

42、e with Q1 MS0017 MISC, CERAMIC PLATE TO-220, CERAMIC INSULATOR 0.025 5 Use with Q1,3,4,7,8 Thermal grease A/R Use with Q1,3,4,5,7,8, D1,D3 RM0002 R43 RES, MF 10K0 1/4W 1% 1 Replace KS0027 50 DEGREE PTC THERMISTOR 1 Add RTV DOW CORNING 747 OR EQUIVALENT A/R CE0145 C6 CAP, E 1000uF 100V 18 x 40 105C 1

43、 To replace 85 deg. part TS0009 HEATSHRINK TUBING 1/16” DIA. A/R For KS0027 leads CC0040 C11 CAP 0.0047F 100v 10% 1 As Needed RX0109 R1, R2 0.1 RES MO, 2W 5% METAL FILM 2 As Needed QB0014 Q6 MPSA92 PNP TO92 TRANS 1 As Needed 293-100K R22 100K 1/2W RES CF 5% 1 As Needed KS0020 R26 SURGISTOR 10R 2A CL

44、-110 (13S100L) 1 As Needed RC0136 R30 RES, CF 160K 1/4W 5% 1 As Needed RC0273 RES, ZERO OHM 1/4W 1 MS0005 SILPAD, .009 .3C/W TO3P 1 The repair procedure is to be executed in 3 phases. 1) POWER SUPPLY BOARD UPGRADE - THESE STEPS CORRESPOND WITH FIGURE 1 Step OPERATION 1. Q1 - This part must be IR onl

45、y. Replace with QM0061, MOSFET, IRF540 TO220AB IR if needed. Use TUBING, #5 BLACK cut to .3 (TS0016) to set mounting height to 0.3”. 19 IL50IL50 2. Q4,Q5. These parts must be IR ONLY. Replace with MOSFET, IRF740 TO220AB IR (QM0055). Q4 and Q5 must have black tubing on component leads: TUBING, #5 BLA

46、CK cut to .3 Inch in length (TS0016) or equivalent. 3. D1 should be MUR1540 MOTOROLA ONLY, if not replace with DR0091, RECT, 15A 200V MUR1540 MOTOROLA 4. Add a thin ceramic, CERAMIC PLATE TO-220, INSULATOR 0.025 THICK (MS0017) behind Q1 with thermal grease on both sides of the ceramic. Ensure that g

47、rease covers the complete surface of ceramic on both sides. 5. Remove SILPAD (MS0005 SILPAD, .009 .3C/W TO3P) behind D3 and thoroughly clean the adhesive film with an Alcohol blended cleaner such as IPA etc. 6. Parts Q4, Q5, D1, D3 must also have thermal grease between the devices and the heatsink.

48、7. Verify that C6 is a 105 deg.C part, if not replace with CAP, E 1000uF 100V 105C (CE0145) 8. Ensure that C11 is 0.0047uF (4700PF 100V 10%). This part must be axial and not a radial part. If not order Infinity Part# CC0040 9. Ensure that R1, R2 are 0.1 ohm resistors (Color Code - Brown, Black, Silv

49、er and Gold) RES, MO 0.1 ohm 2W 5% Metal film, not wire wound. If not order Infinity Part# RX0109 10. Ensure that Q6 is MPS A92 PNP TO92 MPSA92TR. If not order Infinity Part # QB0014 11. Ensure that R22 is 100K, 1/2 watt part. (Color Code - Brown, Black, Yellow and Gold), RES, CF 100K 1/2W 5%. If no

50、t order Infinity Part# 293-100k 12. Ensure that R26 is SURGISTOR 10R 2A CL-110 (13S100L) If not order Infinity Part# KS0020 13. Ensure that R30 is 160K part (Color Code - Brown, Blue, Yellow, Gold), RES, CF 160K 1/4W 5%. If not order Infinity Part# RC0136 14. Assemble the (new part) PRIMARY BLACK HE