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McIntosh MX 110 Service Manual

McIntosh MX 110
22 pages
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CONTENTS
GENERAL
DESCRIPTION.
1
TECHNICAL
DESCRIPTION.
1
INTRODUCTION.
3
FM
ALIGNMENT.
4
MULTIPLEX
ALIGNMENT.
6
SCHEMATIC.
8
DIAL
STRINGING.
11
PARTS
LIST.
12
SPECIFICATIONS..
16
CHASSIS
LAYOUT.
.
18
OPERATING
CURVES.
20
M
AND
X
SERIES
SCHEMATICS.POCKET
2
CHAMBERS
ST.
BINGHAMTON,
N.Y.
WARRANTY
STATION
MX
110
SERVICE
MANUAL
nWntosh
mx

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McIntosh MX 110 Specifications

General IconGeneral
Frequency Range (FM)88 - 108 MHz
Tuning TypeManual
Total Harmonic Distortion (FM)0.5%
Signal-to-Noise Ratio (FM)70 dB
Signal-to-Noise Ratio (AM)50 dB
Output Voltage2.5V
Total Harmonic Distortion (AM)1.0%
Frequency Range (AM)540 - 1600 kHz
Response20 - 20, 000 Hz

Summary

General Description

Technical Description

Multiplex Decoder

Audio

Power Supply

Introduction

FM Alignment

Top (secondary) and bottom, (primary) of 1st, 2nd and 3rd IF transformers

Adjusts IF transformer windings for optimal output voltage.

4th IF transformer, top and bottom.

Adjusts capacitive coupling for eye closure.

Discriminator transformer upper core (secondary)

Adjusts discriminator transformer for zero volts.

Discriminator transformer lower core (primary)

Repeat discriminator core adjustment if needed.

Oscillator trimmer cap.

Adjusts oscillator trimmer capacitor for maximum output.

Oscillator coil tuning slug

Tunes oscillator coil slug for accurate dial calibration.

Mixer trimmer and RF trimmer

Adjusts mixer and RF trimmers for peak performance.

Mixer coil tuning slug and RF coil tuning slug

Tunes mixer and RF coil slugs for optimal output.

Muting adj. control

Adjusts muting control to eliminate background noise.

Overall Sensitivity Check

Tests unit sensitivity using a distortion analyzer.

Multiplex Alignment

67KC trap

Adjusts the 67KC trap for minimum voltage.

19KC phase coil and 19KC transformer

Adjusts 19KC phase coil and transformer for maximum output.

38KC transformer bottom core

Adjusts 38KC transformer bottom core for maximum voltage.

38KC transformer upper core

Adjusts 38KC transformer upper core for stable display.

19KC phase coil

Adjusts 19KC phase coil for maximum separation.

Rejection of 19KC and 38KC frequencies

Checks rejection of 19KC and 38KC frequencies.

MPX indicator light check

Verifies the MPX indicator light operation.

Schematics

Dial Stringing

Parts List

Tubes

Lists all vacuum tubes used in the MX 110.

Transistor

Lists transistor components used in the MX 110.

Diodes

Lists diode components used in the MX 110.

Controls

Lists all control potentiometers and switches with their functions.

Switches

Lists all switches used in the MX 110 with their functions.

Transformers

Lists all transformers used in the MX 110 with their functions.

Capacitors

Lists all capacitors with their values, voltage, and tolerance.

Coils

Lists all coils used in the MX 110 with their values.

Special Resistors

Lists special resistors with their values and tolerances.

Miscellaneous

Lists other miscellaneous parts and accessories.

Specifications

Mechanical Specifications

Details physical dimensions, weight, and finish.

Tuner Specifications

Lists performance metrics for the FM tuner section.

Multiplex Decoder Specifications

Lists performance metrics for the multiplex decoder.

Audio Electrical Specifications

Details audio performance metrics like response and distortion.

Chassis Layout

Operating Curves

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