Infinity INTERMEZZO 2.6 User manual

INTERMEZZO 2.6
POWERED LOUDSPEAKER
SERVICE MANUAL
Infinity Systems, Inc
250 Crossways Park Dr.
Woodbury, New York 797 REV 0 5/00

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TABLE OF CONTENTS
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
DETAILED SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
CONTROLS AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
OPERATION/SYSTEM AURAL SWEEP TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
MECHANICAL/PACKAGING PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
PACKAGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAM/HI-PASS CROSSOVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . 2
AMPLIFIER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INTEGRATED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
PCB DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
SCHEMATICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

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Specifications

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Detailed Specifications

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Detailed Specifications (Cont.)

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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

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Exploded View