Infinity-IL50LR-spk-sm 电路图 维修手册.pdf

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1、Interlude Series IL50 L/R Powered Loudspeaker Service Manual Infinity Systems, Inc 250 Crossways Park Dr. Woodbury, New York 11797 REV10 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 MEC

2、HANICAL 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 DI

3、AGRAMS.28 ELECTRICAL PARTS LIST (120v).34 INTEGRATED CIRCUIT DIAGRAMS 40 HI-PASS CROSSOVER SCHEMATIC.41 IL50 SCHEMATICS.42 2 RadioFans.CN 收音机爱 好者资料库 IL50 L/R 3 Specifications IL50 L/R Frequency Response: 32Hz - 22,000Hz (3dB) Recommended Amplifier Power Range 15-150 watts* Subwoofer Amplifier Output

4、:250 watts (In to 8 from 20 Hz - 100Hz with no more than 0.1% THD) Sensitivity:88dB (2.83V 1 meter) Nominal Impedance:8 Crossover Frequencies:150Hz; 2500Hz, 24dB/octave, Low-Frequency Driver:10 C.M.M.D., magnetically shielded Mid-Bass Driver:6-1/2” C.M.M.D., magnetically shielded High-Frequency Driv

5、er:1” C.M.M.D., magnetically shielded Dimensions (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 allow for occasional peaks. We do not recommend sustained operation at these maximum po

6、wer levels. RadioFans.CN 收音机爱 好者资料库 Detailed Specifications IL50 L/R 4 IL50 L/R 5 Detailed Specifications (Cont.) IL50 L/R 6 Controls and Connections (Cont.) IL50 L/R 7 Controls and Connections IL50 L/R 8 Controls and Connections (Cont.) IL50 L/R 9 Controls and Connections (Cont.) IL50 L/R 10 Operat

7、ion/Bass Optimization SystemTM IL50 L/R 11 Bass Optimization SystemTM (Cont.) 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 a fully clockwise position) and set Level adjustment

8、s for a 6dB (8 clicks from a fully clockwise position). Then,while the music is playing,sit in your favorite chair and have somebody else slowly adjust the Frequency controls from fully clockwise to fully counter-clockwise. At a certain frequency, you should hear the problem lessen and the overall b

9、ass performance improve. When you are satisfied that you have found the best frequency, have your assistant vary the Levels slowly up and down until you have maximized the improvement.If you have really keen ears, you can also have the Bandwidth controls adjusted for maximum benefit. While the Bass

10、Optimization System allows the listener to fine-tune the bass response to sound best in a particular room,some listeners dont have the skill or desire to adjust their system by ear. In order to facilitate quicker and more accurate results, Infinity has developed an optional test and measurement kit

11、that allows the user to perform a series of measurements and aids him/her in properly setting the Bass Optimization System controls. With the addition of this kit,the Bass Optimization System becomes truly room-adaptive. The kit consists of the following:a test CD, a sound-level meter that is specif

12、ically calibrated for low frequencies, and something we call a “Q-Finder, ”a device to help find the width of the measured curve and, finally, a measurement template. It works as follows. The listener plays the tones from the test CD and records the relative output level of each test tone, using the

13、 sound-level meter, on the provided measurement template. After all the tones are complete, the template contains a response curve for the frequencies below 100Hz. The user simply notes the frequency of the largest bass peak,calculates the correct amount of attenuation,and uses the “Q-Finder” to det

14、ermine the width of the curve. These three values are dialed into the Bass Optimization System controls located on 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 may purchase it directly from Infi

15、nity. U.S. residents can visit our Web site at or call 1-800-553-3332.Canadian residents should contact their dealer or call 1-800-567-3275. Ask for Infinity part number 335852-002. 11 10 9 10 11 IL50 L/R 12 IL50 L/R Mechanical Parts List * On 9/1/2000 a new replacement port tube was included with t

16、he IL50. Supplied part number reflects the new part. In addition, modified IL50 product w/ new port tube may be identified by the following serial number prefixes, which appears on the amplifier faceplate and the carton barcode label: IL50BLKL- NM0825-01001 and above IL50MPLL- NM0826-01001 and above

17、 IL50CHL- NM0827-01001 and above IL50BLKR- NM0828-01001 and above IL50MPLR- NM0829-01001 and above IL50CHR- NM0830-01001 and above NOT FOR SALE IL50 L/R 13 Exploded View CABINET, IL50 (NOT FOR SALE) PORT TUBE, 336805-001 See page 12 SCREW, (10) #8X.75 PB PPH BLK 900101-012 SCREW, (6) #8X.75 PB PPH B

18、LK 900101-012 SCREW, (2) #8X.75 PB PPH BLK 900101-012 SCREW, (3) #8X1 PB PPH BLK 900101-016 SCREW, (3) #8X.75 PB PPH BLK 900101-012 SCREW, (4) #6X.75 PB PPH BLK 903401-012 SCREW, (4) 6-19X.375 MS PPH BLK 905401-006 SCREW, (6) #6X.75 PB PPH BLK 903401-012 SCREW, (4) 8-18X.5ZINK MS PPH BLK 905802-008

19、MID RANGE TRANSDUCER, 335741-001 SCREW, (6) #6X.75 PB PPH BLK 903401-012 GRILLE CUP, (6) 333249-003 GRILLE CUP, (3) 333249-003 GRILLE CUP, (7) 333249-003 BAFFLE, 336163-001, R 336163-002, L VOLUME CONTROL ASSY w/CABLE, 336250-001, R 336250-002, L (ROTATED) NETWORK, 336476-001 SPIKE (4), 331360-001 W

20、OOFER, 335808-001 TRIM RING, 336162-001 BUMP-ON (4), 330104-001 GRILLE, BLACK, LEFT 335612-072 GRILLE, BLACK, RIGHT 335612-071 GRILLE, MIDNIGHT BLUE, LEFT 335612-052 GRILLE, MIDNIGHT BLUE, RIGHT 335612-051 GRILLE, RICH BURGUNDY, LEFT 335612-062 GRILLE, RICH BURGUNDY, RIGHT 335612-061 GRILLE, GRAY, L

21、EFT 335612-042 GRILLE, GRAY, RIGHT 335612-041 AMPLIFIER, NOT FOR SALE TWEETER, 335225-002 PEDESTAL, 336256-001 00269 GRILLE, WOOFER, Part of Set - See Upper Grille Options IL50 L/R 14 Exploded View of Amplifier 00277 Rear Plastic Cover 930050 High Level Binding Posts-JC0104 Power Cord, 15 FT. WI0043

22、 Feature PCB Linear PCB RABOS PCB Power Supply PCB EMI Filter PCB IL50 L/R 15 Service Tips Service Bulletin Service Bulletin INF2002-02 - February 2002Warranty labor rate: MINOR repair To:All Infinity Service Centers Model: Interlude IL50, IL100s Subject: No Output In the event you receive an Interl

23、ude 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, replace with a 3A MDL (.25 x 1.25) slo-blo fuse, Infinity part# 80126. Locat

24、e 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 facing upwards. 2. Remove the 10 Phillips screws around the outer p

25、erimeter of the amplifier faceplate; remove the amplifier from the cabinet. 3. Remove two Phillips screws on the faceplate to remove the rear plastic cover; they are (1) the screw directly above the Bass Optimization switch and (1) to the left of the power cord receptacle; remove the amp cover. 4. L

26、ocate the power supply section and R22 from the illustrations below. R22 can be checked in-circuit and should be 100k ohms ?5%. If it is any other value, or open, replace with Infinity part# RC0082. 5. Reassemble the amplifier, rear cover, replace the amplifier in the cabinet and test the subwoofer.

27、 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 event you receive an Interlude or Intermezzo loudspeaker wit

28、h 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# FS0022 IL60, IL120s 4A Infinity part# FS0026 IM1.2s, IM4.1t 6A

29、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 the enclosure. 3) Remove all connectors and screws necessa

30、ry 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 following parts, in circuit, with a DMM: * The two transistor le

31、ads 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 any defective parts above that show measured values lower

32、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/red “CD ” leads on the linear PCB). Isolate the ends so the

33、y 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 measure 28K ohms* Should measure 400 ohms Should measure 28K ohms

34、* 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 D G to S or S to G D to G or G to D Should measure 28K ohms

35、* 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 Q403,404,406,407 Infinity part# QM0055 D to S or S to D G

36、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 R408,411,415,418 Infinity part# RM0072 Should measure 365 ohms 1% I

37、L50IL50 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 source, and replace: IL120S, IL60: Q504,Q507 IRF640 on the Po

38、wer 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 reassembling the amplifier, remount the heatsink, replace th

39、e 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 Upgrade PURPOSE: Improve reliability of the IL50 amplifier; th

40、is 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 CHART BELOW. IR = Brand International Rectifier A/R = As r

41、equired 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 MUR1540 MOTOROLA ONLY 1 As Needed 810066 HEATSINK, FET CLIP

42、, 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 Use with Q1 MS0017 MISC, CERAMIC PLATE TO-220, CERAMIC INSULA

43、TOR 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 To replace 85 deg. part TS0009 HEATSHRINK TUBING 1/16” DIA

44、. 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-110 (13S100L) 1 As Needed RC0136 R30 RES, CF 160K 1/4W 5%

45、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 only. Replace with QM0061, MOSFET, IRF540 TO220AB IR if needed

46、. 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 BLACK cut to .3 Inch in length (TS0016) or equivalent. 3. D1 s

47、hould 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 grease covers the complete surface of ceramic on both sides.

48、 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. 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, Silver and Gold) RES, MO 0.1 ohm 2W 5