McIntosh MR 71 Service Manual

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FM STEREO TUNER

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WARRANTY STATION

MR 71

SERVICE MANUAL

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C O NTENTS
INTRODUCTION ....................... I
FM ALIGNMENT ....................... 2
MULTIPLEX ALIGNMENT ............... 4
SCHEMATIC .......................... a
DIAL STRINGING ..................... s
PARTS LIST .......................... 9
SPECIFICAYIONS ..................... I2
CHASSIS LAYOUT ..... I, ............... I2

.I 2 CHAMBERS ST.
I BINGHAMTON,N.Y.

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MR 71 FM STEREO TUNER
INTRODUCTION

All McIntosh tuners are carefully aligned and tested at the factory
using the finest available test equipment. All Mclntosh tuners will meet
their published specifications when shipped from the factory.

After extensive operation, especially when tubes have been replaced,
it may be desirable to realign the tuner circuits for best performance.
This manual gives complete information on the circuit realignment pro-
cedure for the MR 7] stereo tuner.

The test equipment listed below (or its equivalent) is necessary to properly
align on MR 71. The accuracy of the alignment will be directly related
to the accuracy and calibration of the test equipment used.

FM Signal Generator (Measurements 210A or equivalent)
VTVM

Multiplex Generator (RCA WR-5lA or equivalent)

10.7 MC Generator (Preferably crystal controlled)
Oscilloscope (Hewlett-Packard 1208 or equivalent)

Harmonic Distortion Analyzer, desirable but not essential-
(Hewlett-Packard 3308 or equivalent)

If the necessary test equipment is not available, alignment should
not be attempted. You may contact the McIntosh Customer Service
Department for additional information.

Customer Service
McIntosh Laboratory, inc.
2 Chambers Street
Binghamton, New York

Our telephone number is 723-549]
The direct dial area code is 607