Interlude Series
IL120s Subwoofer
Service Manual
Infinity Systems, Inc |
|
250 Crossways Park Dr. |
|
Woodbury, New York 11797 |
REV 1 10/2001 |
|
IL120s
CONTENTS
SPECIFICATIONS …….…………………………….………………….3 DETAILED SPECIFICATIONS ……………………..…………………4
CONTROLS and CONNECTIONS ………………….….….…………6
OPERATION……………………………………..……..…..…….……..8 BASS OPTIMIZATION SYSTEM…………….………….….…………9 MECHANICAL/PACKING PARTS LIST………………..……………11 EXPLODED VIEW ……………………………………….……………12
PACKAGING …………………………….………………………….…13
EXPLODED VIEW OF AMPLIFIER…………………….……………14 TEST SETUP and PROCEDURE……………….……..……………15 IL120s ADJUST BIAS PROCEDURE………………..…………………16 PRINTED CIRCUIT BOARD DIAGRAMS………………..…………17 ELECTRICAL PARTS LIST (120v)…………………….….…………23
INTEGRATED CIRCUIT DIAGRAMS ………………………………31
IL120s SCHEMATICS…………..……….……………………………32
IL120s
SPECIFICATIONS
IL120s Frequency Response: |
28Hz - 150Hz (±3dB) |
Maximum Amplifier Output: |
500 watts (20Hz - 150Hz with no more than 0.1% THD) |
Crossover Frequencies: |
50Hz - 150Hz, 24dB/octave, continuously variable |
Driver: |
12" C.M.M.D. |
Dimensions (H x W x D): |
17-1/2" x 17-1/4" x 19-3/4" |
Weight: |
45 lb (20.5kg) |
Optional Accessory: |
Bass Optimization |
|
Test & Measurement Kit: |
|
Part Number: 335852-002 |
3
IL120s
DETAILED SPECIFICATIONS
4
IL120s
DETAILED SPECIFICATIONS (Cont.)
5
IL120s
CONTROL and CONNECTIONS
6
IL120s
CONNECTIONS
7
IL120s
OPERATION
8
IL120s
BASS OPTIMIZATION SYSTEMTM
9
IL120s
BASS OPTIMIZATION SYSTEMTM (Cont.)
plays the tones from the test CD and records the relative output level of each test tone, using the 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 determine 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 Infinity. U.S. residents can visit our Web site at www.infinitysystems.com 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.
10
IL120s
MECHANICAL/PACKAGING PARTS LIST
Description |
Part Number |
MECHANICAL |
|
IL120s COMPLETE AMPLIFIER ASSY |
N/A |
WOOFER, 12”, C.M.M.D., shielded, 3.4 ohms ±10% |
336056-001 |
VOLUME CONTROL, R-IL |
336250-001 |
FRONT BAFFLE |
336439-001 |
PORT TUBE |
336799-001 |
GRILLE CUP (12) |
333249-003 |
GRILLE, GRAY |
336441-001 |
GRILLE, MIDNIGHT BLUE |
336441-002 |
GRILLE, RICH BURGUNDY |
336441-003 |
GRILLE, BLACK |
336441-004 |
PACKAGING |
|
OWNER’S MANUAL, IL100S/IL120S |
335839-001 |
WARRANTY CARD |
335841-001 |
SURVEY CARD |
330033-001 |
CARTON |
336497-001 |
FOOT (4) |
334186-002 |
FOOT PAD (4) |
334192-001 |
PAD, END, TOP |
336496-001 |
PAD, END, BOTTOM |
336496-002 |
GRILLE ASSEMBLY |
See Options Above |
POWER CORD, 120V US-15’ |
336658-115 |
RABOS SCREW DRIVER |
335848-002 |
11
IL120s
EXPLODED VIEW
PORT TUBE (336799-001)
IL120s
AMPLIFIER ASSY (NOT FOR SALE)
FOOT (4) (334186-002)
FOOT PAD (4) (334192-001)
SCREW,
#8 x 1, PB TRPH BLK (903101-016)
SCREW, (12)
#8 x .75, PB, PPH BLK (900101-012)
CABINET
(NOT FOR SALE)
VOLUME CONTROL, R-IL (336250-001)
SCREW, (6)
#8 x .75, PB, PPH BLK (900101-012)
SCREW, (2)
#6 x .75, PB, PPH, BLK (903401-012)
WOOFER, 12" (336056-001)
SCREW, (6)
#6 x .75, PB, PPH, BLK (903401-012)
FRONT BAFFLE (336439-001)
GRILLE CUP (6)
(333249-003)
TO SERVICE THE IL120s SUBWOOFER
1)Remove the grille.
2)Extract (6) rubber grille retainers as shown in the illustration above, this can be accomplished by carefully pulling them out of the cavities with long-nosed pliers or similar tool.
3)Remove the (6) Phillips screws that are now exposed.
4)Remove the front baffle.
5)Remove the (6) screws that secure the driver.
6)To service the amplifier, remove the (12) Phillips screws at the rear of the enclosure, and pull the amplifier out of the back.
GRILLE CUP (6) (333249-003)
GRILLE, GRAY 336441-001
GRILLE, MIDNIGHT BLUE 336441-002 GRILLE, RICH BURGUNDY 336441-003 GRILLE, BLACK 336441-004
OO514
12
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