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INTERMEZZO
1.2s Subwoofer
Service Manual
Infinity Systems, Inc
250 Crossways Park Dr.
Woodbury, New York 11797
REV 4 5/2005
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INTERMEZZO 1.2s CONTENTS SPECIFICATIONS …………………………………………………….3 DETAILED SPECIFICATIONS …………………….…………………4 CONTROLS and CONNECTIONS …………………….….…………6 OPERATION………………………..……………………….…………10 MECHANICAL/PACKAGING PARTS LIST…………………………11 EXPLODED VIEW of INTERMEZZO 1.2s …………………………12 PACKAGING …………………………….………………………….…13 TEST SET UP AND PROCEDURE …………………………………14 BULLETIN INF2001-04…………………………………….…………15 IM 1.2s ADJUST BIAS PROCEDURE………………………………17 ELECTRICAL PARTS LIST ……………………………….
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INTERMEZZO 1.2s Specifications Frequency Response: 23Hz - 130Hz (±3dB) 30Hz - 130Hz (±1.5dB) Subwoofer Amplifier Output: 850 watts continuous (In to 8from 20Hz-100Hz with no more than 0.1% THD) 2,600 watts peak 2nd- and 3rd- Order Harmonic Distortion: <1% (20Hz - 130Hz, @ 95dB SPL) Crossover Frequencies: 50Hz - 130Hz (continuously variable) 24dB/Octave Dimensions (H x W x D): 15-1/4” x 18-1/4” x 13-3/4” (387mm x 464mm x 349mm) Weight: 60 lb (27.3kg) Infinity continually strives to update and
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INTERMEZZO 1.2s Detailed Specifications 4
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INTERMEZZO 1.2s Detailed Specifications (Cont.) 5
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INTERMEZZO 1.2s Controls and Connections 6
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INTERMEZZO 1.2s Controls and Connections (Cont.) 7
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INTERMEZZO 1.2s Controls and Connections (Cont.) 8
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INTERMEZZO 1.2s Controls and Connections (Cont.) 9
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INTERMEZZO 1.2s Operation The operation of the Intermezzo1.2s subwoofer with regards to the proper settings for the Room Adaptive Bass Optimization System, or R.A.B.O.S., is thoroughly covered in the Owner’s guide, part# 336204-001. For service purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully Clockwise. The only other control of concern is the Main Level Control on the front panel, which is a traditional potentiometer. 10
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INTERMEZZO 1.2s Mechanical/Packaging Parts List Ref No. Description Part Number MECHANICAL 1 GASKET, REAR 331106-001 2 12” Woofer C.M.M.D. Shielded, DCR 7.6 ohms ±10%, 335036-001 3 RABOS ASSEMBLY 336202-001 4 SCREW, 8-32 x .5 BLK, MS,PPH (16) 900201-008 5 GRILLE CUP (14) 333249-003 6 Front BAFFLE 335270-001 7 SCREW, 6-32 x .5 BLK, MS,PPH (12) 900301-008 AMPLIFIER (NOT FOR SALE) 8 GRILLE (See options below) 335735-040 9 DÉCOR TRIM PANEL (See options below) 335739-030 PACKAGING 10 RABOS KIT 335852
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INTERMEZZO 1.2s Exploded View INTERMEZZO 1.2S CABINET (NOT FOR SALE) 4 1 2 3 4 (ROTATED) 5 SEE AMPLIFIER VIEW (NOT FOR SALE) A 7 6 VIEW 9 A DÉCOR TRIM PANEL, BLACK 335739-030 (REDUCED) DÉCOR TRIM PANEL, CHERRY 335739-020 DÉCOR TRIM PANE, MAPLE 335739-010 8 GRILLE, WARM PLATINUM 335735-040 GRILLE, MIDNIGHT BLUE 335735-050 GRILLE, RICH BURGUNDY 335735-060 REMOVE THESE GRILLE CUPS AND SCREWS ONLY TO SERVICE THE INTERMEZZO 1.2s 1) Remove the grille and side panel. 2) Extract (8) of the rubb
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INTERMEZZO 1.2s Packaging View 11 16 17 18 8 9 13 10 12 14 15 13 00450
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INTERMEZZO 1.2s Test Set Up and Procedure AC VOLT METER (10V) SIGNAL GENERATOR INTERMEZZO 1.2s UNDER TEST SPEAKER AMPLIFIER OUTPUT FROM AMPLIFIER The operation of the Intermezzo 1.2s subwoofer,and the proper settings for the Room Adaptive Bass Opitmization System, or R.A.B.O.S., is thoroughly covered in the Owner’s guide, part #336204-001. For service purposes, the R.A.B.O.S. system is canceled when all three front panel controls (F) (L) (W) are turned fully CW (Clockwise). The only other contro
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INTERMEZZO 1.2s 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 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) Ch
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INTERMEZZO 1.2s 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 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 amplifi
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INTERMEZZO 1.2s IM 1.2s ADJUST BIAS PROCEDURE (Mandatory when any output MOSFET transistors Q305,310,320,321,306,307,311,312 are replaced) 1. Amplifier should be unplugged and OFF. 2. Remove Amp assembly from cabinet, following the instructions on Page 12. 3. Identify the Linear board assembly (PCB with the output transistors) 4. Adjust RP301 and RP302 fully Counter Clockwise. See diagram below. 5. Apply 120 VAC power to unit; turn power switch ON. 6. Verify LED illuminates
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INTERMEZZO 1.2s Electrical Parts List Part# Reference Designator Qty Description Linear Amplifier/Regulator Board Semiconductors DS0001 D301,D302,D303,D304,D305, 24 RECT, 100mA 75V SIGNAL 1N4148T D306, D307,D308,D309,D310, D311,D312, D313,D314,D315, D316,D317,D318, D319,D320, D321,D323,D325,D330 DR0085 D324 1 RECT, 8A 400V TO220AC MUR860 QB0002 Q314,Q315,Q317 3 TRANS, NPN 40V .6A TO92 2N4401 QB0017 Q303,Q308,Q322,Q323 4 TRANS, NPN 150V 0.6A 2N5551TR QB0018 Q302,Q304,Q309,Q31
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INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator Qty Description CF0146 C361 1 CAP, F 6.8UF 250V 10% 27MMLS CC0059 C304 1 CAP, CA .1UF 100V 20% Resistors RC0004 R399 1 RES, CF 1M0 1/4W 5% RC0006 R349 1 RES, CF 10K 1/4W 5% RC0061 R350 1 RES, CF 4K7 1/4W 5% RC0083 R303 1 RES, CF 100K 1/4W 5% RC0087 R323,R326,R327,R339,R340,R341 6 RES, CF 330R 1/4W 5% RC0116 R3107 1 RES, CF 330K 1/4W 5% RC0127 R3106 1 RES, CF 30K 1/4W 5% RC0128 R376 1 RES, CF 33K 1/4W 5
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INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator Qty Description RC0229 R3103 1 RES, CF 200K 1/2W 5% RP0056 RP301,RP302 2 POT, 5K 8MM HOR TOP ADJ/COVER RW0022 R346,R347,R393,R394 4 RES, WW 0R1 2W 5% RC0006 R310 1 RES, CF 10K 1/4W 5% Miscellaneous 480022 FO310 1 SUB, #18B 6 1/4 STRIP/187X032 480028 FO309 1 SUB, #18R 6 1/4 STRIP/187X032 480084 1 SUB, #18G 4 187X032/#6 RING 540130 L302 1 IND, CM CHOKE 150UH ELYTONE BF0007 L301 1 BEAD, FERRITE JH0008 J302
