INTERMEZZO 1.2s Subwoofer Service Manual Infinity Systems, Inc 250 Crossways Park Dr.
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 ……………………………….
INTERMEZZO 1.2s Specifications Frequency Response: 23Hz - 130Hz (±3dB) 30Hz - 130Hz (±1.5dB) Subwoofer Amplifier Output: 850 watts continuous (In to 89from 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.
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INTERMEZZO 1.2s Detailed Specifications (Cont.
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INTERMEZZO 1.2s Controls and Connections (Cont.
INTERMEZZO 1.2s Controls and Connections (Cont.
INTERMEZZO 1.2s Controls and Connections (Cont.
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.
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 .
INTERMEZZO 1.2s Exploded View INTERMEZZO 1.2S CABINET (NOT FOR SALE) 4 1 2 3 4 (ROTATED) 5 SEE VIEW AMPLIFIER (NOT FOR SALE) A 00446 7 6 VIEW 9 A (REDUCED) DÉCOR TRIM PANEL, BLACK 335739-030 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.
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INTERMEZZO 1.2s Test Set Up and Procedure AC VOLT METER (10V) SPEAKER OUTPUT FROM AMPLIFIER 335733 AMPLIFIER INTERMEZZO 1.2s UNDER TEST 00464 SIGNAL GENERATOR 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).
INTERMEZZO 1.2s Service Bulletin Service Bulletin INF2001-04 Rev2 – May 2005 To: Warranty labor rate: MINOR repair 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) Check the line fuse to make sure it’s not damaged.
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.
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.
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INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator Qty Description CF0146 CC0059 Resistors C361 C304 1 1 CAP, F 6.8UF 250V 10% 27MMLS CAP, CA .
INTERMEZZO 1.2s Electrical Parts List (Cont.
INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator RX0046 Qty Description R421 1 RES, MO 47K 1W 5% C409 C421 C415,C416,C418 C406,C408,C412,C414 C401,C402,C403,C422,C423,C424 C426, C427, C430, C431 C428 C428, C429 1 1 3 4 6 4 1 2 CAP, CAP, CAP, CAP, CAP, CAP, CAP, 2 1 1 4 6 XFMR, POWER 1000W YT ETD44 3F3 CNCTR, HEADER 5PIN .
INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator 480090 480097 540124 500103 810088 JH0008 KV0001 MT0023 SR0038 HN0006 HS0009 Qty Description 1 1 1 1 1 1 1 2 1 1 1 SUB, #18R 9 187X032/1/4STRP SUB, #18B 9 187X032/1/4STRP IND, CHOKE CM XFMR, 60HZ 24V 1.1VA MET, HTSNK 1X2 BRIDGE For D501 CNCTR, HEADER 5PIN .100CTR VARISTOR, 275V 100J .
INTERMEZZO 1.2s Electrical Parts List (Cont.
INTERMEZZO 1.2s Electrical Parts List (Cont.
INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator Qty Description Miscellaneous 480033 3 480104 1 930052 930053 FH0006 FS0027 HS0047 1 1 1 1 12 HS0057 3 HS0060 14 HS0078 2 INTERMEZZO 1.2H INTERMEZZO 1.2P JC0079 1 1 1 JC0129 JC0179 1 1 JC0180 1 JC0181 1 JC0182 1 MZ0042 4 SR0032 HS0054 1 7 HS0088 1 25 SUB, #18R 4 1/4 187X032/187X032 1PC. IEC LIVE TO FUSE HOLDER; 1PC. FUSE HOLDER TO SWITCH; IPC.
INTERMEZZO 1.2s Electrical Parts List (Cont.) Part# Reference Designator Qty HS0090 2 HW0004 8 HW0040 1 MM0071 MM0073 1 1 MM0074 1 MZ0003 4 MZ0043 2 RP0057 1 26 Description SCREW, M3X16MM PAN PHIL BLK TO ALIGN SR0041 WASHER, SPLIT #6 ZNP TO MOUNT POWER SUPPLY AND LINEAR BOARD WASHER, FLAT #8 NYLON 3/8 USED TO MOUNT U BRACKET TO ENCLOSURE MISC, CUP GASKET INTERMEZZO 1.
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INTERMEZZO 1.2s Integrated Circuit Diagrams -5V TO220, 7905CT, REGULATOR U303, 502 TRANS, 250V TO220,TIP47 Q319 1. GROUND 2. INPUT 3. OUTPUT RT/ C T +5V TO220, 7805CT REGULATOR U302, 501 B C E FOTO, MOC3012, 4N35 U304, 100 JFET, J111, Q100,101,103,201, 202, 205, 301 1 2 3 1. D 2. S 3. G 1. INPUT 2. GROUND 3.
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