CONTROLS and CONNECTIONS ……………………….…………6 TEST SET UP AND PROCEDURE …………………………………8 SERVICE BULLETIN INF2002-3…………………….………………9 IM 3.5c ADJUST BIAS PROCEDURE………………………………10 EXPLODED VIEW of INTERMEZZO 3.5c …………………………11 EXPLODED VIEW of AMPLIFIER …………………………….……12 PACKAGING ……………………………………………………….…13 WIRING DIAGRAM/PASSIVE CROSSOVER NETWORK ………14 ELECTRICAL PARTS LIST ……………………………….…………15 INTEGRATED CIRCUIT DIAGRAMS ………………………………20...
INTERMEZZO 3.5c Test Set Up and Procedure AC VOLT INTERMEZZ0 3.5c METER (10V) UNDER TEST SIGNAL GENERATOR SPEAKER AMPLIFIER OUTPUT FROM AMPLIFIER SYSTEM AURAL SWEEP TEST Equipment needed: Function/signal generator/sweep generator Integrated Amplifier Multimeter Speaker cables General Unit Function (UUT = Unit Under Test) 1.
4. Locate the power supply section and R22 from the illustrations below. 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. 5. Replace the amplifier, bottom cover, and test the loudspeaker.
IM 3.5c ADJUST BIAS PROCEDURE (Mandatory when any output MOSFET transistors Q3,4,7,8 are replaced) 1. Amplifier should be unplugged and OFF. 2. Remove Amp assembly from cabinet, following the instructions on Page 9. All wires can remain connected unless they will prevent you from removing the amplifier or accessing potentiometers on the Linear board PCB in the following steps.
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