Infinity INTERMEZZO 4.1t Service Manual
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Infinity INTERMEZZO 4.1t Service Manual

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INTERMEZZO 4.1t
POWERED LOUDSPEAKER
SERVICE MANUAL
Infinity Systems, Inc.
250 Crossways Park Dr.
Woodbury, New York 11797
REV 4 5/2005

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Summary of Contents for Infinity INTERMEZZO 4.1t

  • Page 1 INTERMEZZO 4.1t POWERED LOUDSPEAKER SERVICE MANUAL Infinity Systems, Inc. 250 Crossways Park Dr. Woodbury, New York 11797 REV 4 5/2005...

  • Page 2: Table Of Contents

    - CONTENTS - SPECIFICATIONS ..……………………….………………………..3 DETAILED SPECIFICATIONS . . …………………………………..4 CONTROLS and CONNECTIONS . . . …………….……………..……..6 OPERATION . . . …………………………………….……………………..10 IM 4.1t ADJUST BIAS PROCEDURE…..………………………………….

  • Page 3: Specifications

    We do not recommend sustained operation at these maximum power levels. Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in this manual and related Infinity publications are therefore subject to...

  • Page 4: Detailed Specifications

    INTERMEZZO 4.1t Detailed Specifications LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes US 120vac/60Hz Yes 108-132 Vrms Normal Operation EU 230vac/50 – 60Hz Yes 207-264 Vrms Normal operation, MOMS required Parameter Specification Unit QA Test Conditions Notes Limits Amp Section...
  • Page 5 INTERMEZZO 4.1t Detailed Specifications (cont.) Features Main Power On/Off Switch rocker -- functional Locate at amp plate High-Level High-Pass Switch push button -- functional Locate at amp plate Single pole, rated 10A @120V/240V, or more Low-Pass Filter Switch 3-pos switch --...

  • Page 6: Controls And Connections

    INTERMEZZO 4.1t Controls and Connections Rear Panel Front Panel – LOW- LOW- INPUTS LEVEL LEVEL INPUT OUTPUT ® INTERMEZZO 4.1t BASS MODE AC FUSE 6A 250V HIGH-PASS FILTER POWER CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN 120V – 60HZ 6A...
  • Page 7 If none of these system configurations seem to 2-Channel system with separate preamplifier and power amplifier match yours, consult your dealer or Infinity customer service for direction on how best to hook up your ® Dolby Pro Logic with THX, Dolby Digital, system.
  • Page 8 INTERMEZZO 4.1t Controls and Connections (cont.) (ONE CHANNEL SHOWN) SURROUND RECEIVER FRONT SPEAKER SUBWOOFER (LFE) – OUTPUTS OUTPUT Method 3a – LOW- LOW- INPUTS LEVEL LEVEL INPUT OUTPUT TO SECOND 4.1t Y-Connector ® INTERMEZZO 4.1t BASS MODE RED = AC FUSE...
  • Page 9 RISK OF ELECTRIC SHOCK DO NOT OPEN 120V – 60HZ 6A Final Positioning After correctly connecting the Intermezzo 4.1t and verifying that both the subwoofer and main section portions are playing, it is time to optimize the system for your particular listening room.

  • Page 10: Operation

    INTERMEZZO 4.1t Operation The operation of the Intermezzo 4.1t loudspeaker system, and 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# 336205-001. 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.

  • Page 11: Im 4.1T Adjust Bias Procedure

    INTERMEZZO 4.1t IM 4.1t 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; remove rear plastic guard, and detach entire assembly from black plastic cup containing the controls.

  • Page 12: Test Setup And Procedure

    INTERMEZZO 4.1t Test Setup and Procedure – AC VOLT LOW- LOW- INPUTS LEVEL LEVEL METER (10V) INPUT OUTPUT SIGNAL ® INTERMEZZO 4.1t GENERATOR INTERMEZZO 4.1t BASS MODE UNDER TEST AC FUSE 6A 250V HIGH-PASS FILTER AMPLIFIER POWER CAUTION OUTPUT FROM GENERATOR/AMPLIFIER...

  • Page 13: Mechanical Parts List

    INTERMEZZO 4.1t Mechanical Parts List Cabinet Intermezzo 4.1t L/R (Not for Sale) Amplifier Assembly Not For Sale Grille (L) (Set - Upper & Lower) Blue 335734-052 (R) (Set - Upper & Lower) Blue 335734-051 (L) (Set - Upper & Lower) Gray 335734-042 (R) (Set - Upper &...

  • Page 14: Exploded View

    Screws Only Titanium (2) Remove These Grille Cups and Screws Only TO SERVICE THE INTERMEZZO 4.1t 1. Remove the grilles and side panels. (ROTATED 2. Extract (20) of the rubber grille retainers and (2) of the titanium retainers 90° CCW) as shown in the illustration;...

  • Page 15: Exploded View Of Amplifier

    INTERMEZZO 4.1t Exploded View of Amplifier FILTER BOARD POWER SUPPLY FEATURE XOVER BOARD BOARD LINEAR BOARD...

  • Page 16: Packaging Parts List

    INTERMEZZO 4.1t Packaging Parts List Outer Carton 336491-001 End Pad (Right, top right) 336215-001 End Pad (Left, top right) 336216-001 End Pad (Right, top left) 336215-002 End Pad (Left, top left) 336226-002 End Pad (Right, bottom right) 336215-003 End Pad...

  • Page 17: Packaging

    INTERMEZZO 4.1t Packaging...

  • Page 18: Service Bulletin Inf2003-03

    All Infinity Service Centers Model: Intermezzo 4.1t Subject: Distortion at Low Volume Levels In the event you receive an Intermezzo 4.1t with the complaint “there is distortion at low volume levels, particularly when higher frequencies are present”, perform the following procedure: Synopsis: Remove three components and re-wire them in a similar circuit on the opposite side of the Feature PCB.
  • Page 19 INTERMEZZO 4.1t 11) After silicon sealer dries, reassemble feature PCB replacing all connectors and switch assembly. Replace faceplate and all connectors; install amplifier back into the IM4.1t enclosure. Replace woofer. 12) Test the unit. Model Serial number (120v) Status Action...

  • Page 20: Service Bulletin Inf2001-04

    Service Bulletin Service Bulletin INF2001-04 Rev2 – May 2005 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:...
  • Page 21 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.

  • Page 22: Printed Circuit Board Diagrams

    INTERMEZZO 4.1t Right R.A.B.O.S. Left R.A.B.O.S.
  • Page 23 INTERMEZZO 4.1t Right Volume Left Volume...
  • Page 24 INTERMEZZO 4.1t AC Filter Feature Board...
  • Page 25 INTERMEZZO 4.1t 1KW Power Supply XOVER SWT BD...
  • Page 26 INTERMEZZO 4.1t Linear Class-D Board...

  • Page 27: Electrical Parts List

    INTERMEZZO 4.1t Electrical Parts List Part# Reference Designator Qty. Description Feature PCB Semiconductors UA0003 U100, U101 OPAMP, QUAD 14PIN DIL LM324N UA0009 U102, U103 OPAMP, QUAD 14P DIL TL074/084 UF0012 U104 FOTO, 6PIN 4N35 DR0038 D111, D112, D113, D114, D115, D116...
  • Page 28 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description CE0116 C102 CAP, E 2.2UF 50V BP 6X11 5MMLS CF0045 C113, C114 CAP, F .1UF 63DC 5% 5MMLS CF0088 C104, C105 CAP, F .01UF 100V 5% 5MMLS CF0092 C107...
  • Page 29 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description RC0127 R3106 RES, CF 30K 1/4W 5% RC0128 R376 RES, CF 33K 1/4W 5% RC0135 R363 RES, CF 150K 1/4W 5% RC0229 R3103 RES, CF 200K 1/2W 5% 1/4W BODY...
  • Page 30 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description CE0106 C305, C315, C326 CAP, E 22UF 35V BP 8X11 5MMLS CF0008 C342 CAP, F 2200PF 100V 5% 5MMLS CF0035 C306, C316 CAP, F .022UF 100V 5% 5MMLS CF0045 C302, C303 CAP, F .1UF 63DC 5% 5MMLS...
  • Page 31 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description Capacitors CC0124 C446, C447 CAP, C .01UF 500V DISC .2LS TR CE0013 C415, C416, C418 CAP, E 47UF 50V 20% 5MMLS CF0093 C406, C408, C412, C414 CAP, F 4700PF 100V 5% 5MMLS...
  • Page 32 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description RP0088 POT, C10K DUAL -10% MID 1.5K RC0148 RES, CF 10M 1/4W 5% RM0001 R27, R29 RES, MF 1K00 1/4W 1% RM0002 R1, R2, R4, R10, R15, R16, R24, R26, R32, R37...
  • Page 33 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description RM0377 RES, MF 3K57 1/4W 1% RM0378 RES, MF 549 ohms1/4W 1% Capacitors CE0115 C4, C5 CAP, E 1UF 63V 6X11 85C 5MMLS CF0045 C1, C2, C3 CAP, F .1UF 63DC 5% 5MMLS...
  • Page 34 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description FS0027 FUSE, 6A 250V 1.25X.25 GLASS HN0003 NUT, HEX NYLON #6-32 L302 ON THE LINEAR BOARD HN0006 NUT, HEX KEP #6-32 ZNP 1PC FOR BRIDGE HEATSINK; 4PC FOR THE PRIMARY AND DIODE HEATSINK;...
  • Page 35 INTERMEZZO 4.1t Electrical Parts List (cont.) Part# Reference Designator Qty. Description JC0182 CNCTR, 2PIN FEM/2XFEM FASTON TO LIVE AND NEUTRAL FROM SWITCH TO THE EMI BOARD JC0192 CNCTR, FEM-MAL HARN 2P 20" #16 CONNECT TO FO101(.250) TO FO103(.205) ON FEATURE BOARD JC0193 CNCTR, FEM-MAL HARN 2P 49"/30"...

  • Page 36: Passive Network Schematic

    INTERMEZZO 4.1t IM 4.1t PASSIVE NETWORK SCHEMATIC DIAGRAM...

  • Page 37: Schematics

    INTERMEZZO 4.1t...
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