Infinity INTERMEZZO 2.6 Bedienungsanleitung

INTERMEZZO 2.6

POWERED LOUDSPEAKER

SERVICE MANUAL

Infinity Systems, Inc

250 Crossways Park Dr.

Woodbury, New York 797REV5 7/2004

CONTENTS

SPECIFICATIONS …….……………………………………………….3

DETAILED SPECIFICATIONS …………………….…………………4

CONTROLS and CONNECTIONS …………………….….…………6

OPERATION/SYSTEM AURAL SWEEP TEST………..…….……..8

SERVICE BULLETIN INF2000-05 ………….………………….…….9

SERVICE BULLETIN INF2002-04 ….………………….…………...10

TECH TIP INF2003-03………………………………………..………11

MECHANICAL/PACKAGING PARTS LIST…………………………12

EXPLODED VIEW ……………………………………….……………13

PACKAGING …………………………….………………………….…14

WIRING DIAGRAM/HI-PASS CROSSOVER SCHEMATIC…..….15

AMPLIFIER BLOCK DIAGRAM……..…………………….…………16

IM 2.6 ADJUST BIAS PROCEDURE…………….………….………17

ELECTRICAL PARTS LIST (120v)…………………….….…………18

ELECTRICAL PARTS LIST (230v)…………………….….…………26

INTEGRATED CIRCUIT DIAGRAMS ………………………………34

PRINTED CIRCUIT BOARD DIAGRAMS………………..…………35

SCHEMATICS …………………………………………………………39

Intermezzo 2.6

Specifications

Intermezzo 2.6

Detailed Specifications

Intermezzo 2.6

Detailed Specifications (Cont.)

Intermezzo 2.6

SYSTEM AURAL SWEEP TEST

Equipment needed:

lFunction/signal generator/sweep generator

lIntegrated Amplifier

lMultimeter

lSpeaker cables

General Sweep Function (UUT = Unit Under Test)

1. Turn the RABOS level control on the front of the UUT to “0”. Depress both “High-Pass Filter”

and “Placement” buttons on the rear faceplate.

2. Connect one pair of speaker cables to the input terminals on UUT. Cables should be connected

to an integrated amplifier fed by the signal generator.

3. Turn on signal generator and adjust so that speaker level output at the amplifier is 7.0V, 50 Hz.

4. Plug in and turn on UUT with the power switch; LED on the Level control should light – Red ini-

tially and Green after step #5 is followed.

5. Turn up the RABOS level control on the front of the UUT to “10”. (Maximum). Woofer should be

driving close to maximum excursion at this point.

Driver Function

1. Remove driver from cabinet; (See Page 10), detach + and - wire clips.

2. Check DC resistance of woofer; it should be 3.4 ohms ±10%.

3. Connect a pair of speaker cables to driver terminals. Cables should be connected to an

integrated amplifier fed by a signal generator. Turn on generator and adjust so that speaker level

output is 5.0V.

4. Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual

noises.

The operation of the Intermezzo 2.6 loudspeaker system,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

#335714-001.

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, and the Shelf/Stand Placement Selector switch should be set to the

“STAND” position.

The only other control of concern is the Main Level Control on the front panel, which operates like a

traditional potentiometer.

Operation

Left Right

Intermezzo 2.6

Service Bulletin

Service Bulletin INF2002-04 - February 2002 Warranty labor rate: MINOR repair

To: All Infinity Service Centers

Model: Intermezzo 2.6

Subject: No Output

In the event you receive an Intermezzo 2.6 loudspeaker 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 it’s not open. If open, replace with a 3A MDL (.25 x 1.25) slo-blo fuse,

Infinity part# 80126.

Locate 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 and side panel.

2) Extract (7) of the rubber grille retainers shown in the illustration; this can be accomplished by carefully pulling

them out of their cavities with long-nosed pliers or similar tool.

3) Remove the (7) Phillips screws that are now exposed.

4) Carefully lift the front baffle, with drivers, network, and RABOS controls attached, off the cabinet.

5) Remove the (8) Phillips screws at the rear of the enclosure, and push the amplifier assembly out the front.

6) Locate the power supply section and R22 from the illustrations below. Remove the black plastic guard from

the area of concern (loosen (2) Phillips screws). 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.

7) Replace the guard, the amplifier, reassemble and and test the loudspeaker.

Intermezzo 2.6

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