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NuTone Manuals
Intercom System
im-406
Service manual
NuTone im-406 Service Manual
3-twisted-pair (6-wire) built-in centralized radio intercom system
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Contents
Table of Contents
Troubleshooting
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Table of Contents
Contents
Wiring Specifications
Radio/Intercom Speaker Wiring
Door Speaker Wiring
Operational Checkout
IM-406 Master Unit
Muting
Intercom Operation
IS-48 Inside 8 Inch Speaker
IS-16 Inside 5 Inch Speaker
Door Speakers
IS-47 I/P Speaker/Clock Timer
Background Music
Theory of Operation
Power Supply
Radio Module
Component Side
Foil Side
Audio Controls, Inputs and Outputs
AM Tuner
Alignment
Tuner Alignment
F.M. Alignment
Master Unit Settings
Instruments Required
A.M. Alignment
Dial Cord Installation
Cathode Ray Oscilloscope
AM Signal Generator
Audio Amplifier
Inside/Patio Intercom Speaker Switching and Terminal Board Connections
Terminal Board
Speaker Wiring
Chime/Alarm Wiring
Station Selector Switches S101-S110
Control Module
Inside/Patio Speakers
IS-47 Speaker/Clock Timer
Operating Voltages
Control Module Intercom Operation
6-Wire Radio/Intercom Master Unit
Servicing the IM-406 System
Removing Master Unit from Rough-In Housing
Exploded View IM-406 Master Unit
In the Field Replacement of Control Module
In the Field Replacement of Tuner Module
In the Field Replacement of Terminal Board
Amplifier/Power Supply Module Interconnecting Wires
Bench Servicing the Complete Chassis Assembly
Replacement of I/P and Door Talk/Listen Switches
Bench Checking the Chassis Assembly
Reassemble Master Unit
Troubleshooting
System Dead - no Pilot Lights
System on - no Pilot Lights
No FM - Intercom, am and Auxiliary Normal
IM-406 Power Supply and Muting Control Circuit
Modifications to Amplifier/Power Supply Module
Original Production Amplifier/Power Supply Foil Pattern
Later Production Control Module Schematic
Replacement Parts List
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Wiring Specifications
2
Radio/Intercom Speaker Wiring
3
IM-406 Master Unit
4
Audio Controls, Inputs and Outputs
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