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Intercom System
IM-313 Communicenter
NuTone IM-313 Communicenter User Manual
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2
Table of Contents
Contents
2
Wiring Block Diagram
3
Installation
4
Operational Checkout
4
Remote Speaker Wiring Connections
4
Master Unit
5
Operating the Tape Cassette
6
Message Center Operation
6
Door Speakers
6
Muting
7
Intercom Operation
7
Inside 5-Inch Speaker/Clock Timer
8
Background Music
8
Chime/Alarm Operation
9
Theory of Operation
9
Radio/Amplifier and Intercom Control
9
Power Supply
9
FM Tuner
10
AM Tuner
10
Audio Controls
11
Inputs and Outputs
11
Alignment
11
Audio Amplifier
12
Terminal Board
14
Message Board and Cassette Player/Recorder
15
Electronic Operation
15
Cassette Tape Player/Recorder
16
Playback
16
Recording
16
Circuit Changes in Later Production Units
17
Cassette Player/Recorder Mechanical Operation
17
Play
17
Rewind
18
Record
18
Fast Forward
18
Cassette Recorder Mechanism - Exploded View
19
Cassette Player/Recorder Service
20
Servicing the IM-313 System
20
Removing Master Unit from Its Wall Mounting
21
In the Field Terminal Board Replacement
22
In the Field Control Module Replacement
22
AM/FM Tuner Module Component Location
23
AM/FM Tuner Module Foil Pattern
23
Control Module Component Location
25
Control Module Foil Pattern
25
Terminal Board Terminal Side Layout
25
Operating Voltages
26
Pin Number
26
Element
26
Control Module Intercom Operation
26
In the Field Tuner Module/Replacement
35
Tuner/Amplifier Chassis Assembly Exploded View
35
In the Field Tape Cassette Player/Recorder Replacement
36
In the Field Digital Clock Replacement
36
Replacing Clock Lights in the Field
36
Replacing Message Board in the Field
37
Removing Tuner/Amplifier Assembly from Master Unit Housing
37
Replacing Pilot Light
37
Bench Checking the Master Unit
38
Troubleshooting
38
System Dead - Clock Lights off
38
Distortion at All Speakers
38
No Muting During Intercom Operation
39
High Pitch Squeal
39
Tuner Alignment
40
F.M. Alignment
40
Master Unit Settings
40
Instruments Required
40
A.M. Alignment
41
Addendum to IM-313
42
Muting Circuit Modification
42
DC Power Supply Modifications
42
New PC Boards
44
R.F. Interference
44
Component Layout
45
Foil Pattern
45
Setting of F.M. Squelch Control
46
Replacement Parts List
48
4
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NuTone IM-313 Communicenter Specifications
General
Brand
NuTone
Model
IM-313 Communicenter
Category
Intercom System
Language
English
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