Marantz 2330 B Owners Manual

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FOREWORD

To obtain maximum performance and enjoyment
from the Model 23308 Stereo Receiver, please
study these instructions carefully. Installing and
operating the Model 23308 is not complicated,
but the flexibility provided by its numerous oper-
ating features merits your becoming familiar with
its controls and connections. Our recommended
procedures will assure you of securing the superb
performance for which the Model 23308 was
designed.

For convenience, this manual is divided into two
parts. The first part covers installation and opera»
tion in a simple, nontechnical manner. The second
part provides a more detailed description of the
features of the Model 23308.

For quick identification of the many controls,
connection facilities, and adjustments on the
Model 23308 Stereo Receiver, all references to
them in this manual are printed in BOLDFACE

type.

AC Line Operation

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GENERAL DESCRIPTION

The Marantz Model 23308 is an all solid state
receiver incorporating the innovative design and
unparalleled technology that have made Marantz
famous in the audio component industry.

The Model 2308 features a sensitive FM tuner,
a highly selective AM tuner, a low distortion
preamplifier, and two direct coupled power
amplifiers on a single chassis, while retaining a
flexibility comparable to that achieved using
separate components. The FM tuner utilizes an
MOSFET front end, ceramic IF filters, and an
advanced integrated circuit for high selectivity
and sensitivity.

The amplifier sections permit the connection of
two stereo pairs of loudspeakers, two turntables
or record changers, two tape recorders, stereo
headphones, and an auxiliary source such as an
additional tuner or a TV sound source. The
23308 also features a variable turnover tone con-
trol and front panel dubbing jacks.

AFTER UNPACKING

It will be to your advantage to save all the pack
ing materials, carton, fillers, cushioning, etc. They
will prove valuable in preventing damage should it
become necessary to transport or ship the Model
23308. Be careful that you do not inadvertently
throw away or lose the parts packed with the unit.

Please inspect this unit carefully for any signs of
damage incurred in transit. It has undergone very
strict quality control inspections and tests prior
to packing, and it left the factory unmarred and
in perfect operating condition. if the unit was
shipped directly to you and you discover damage,
notify the transportation company without delay.
Only you, the consignee, may institute a claim
against the carrier for damage during shipment.
However, the Marantz Company will cooperate
fully with you in such an event. Save the carton
as evidence of damage for their inspection. If you
received the unit directly from a Marantz dealer,
return it to him for adjustment.

Page 2

TABLE OF CONTENTS

Preparation for Use
Mechanical Installation

Marantz Walnut Wood Veneer Cabinet

Custom Installation

Connecting the Model 23303
Phono Inputs Jacks
Tape Monitor Jacks
Aux Input Jacks
FM Antenna
Outdoor FM Antennas
AM Antenna

Pre Out and Main In Jacks
Speaker Systems

Speaker Phasing
Connection to AC Outlet
Convenience Outlets

AC Protector Fuse

Dolby Plug-in FM Decoder Installation

Signal Connection Checklist
Simplified Operating Procedures

Main Controls and Switches
Power Switch
Selector Switch
Volume Control
Balance Control
Bass, Mid and Treble Controls
Tone Mode Switch
Mode Switch
Tuning Meters
Gyro~Touch Tuning Knob
Multipath Button
MPX Noise Filter Switch
Filters Switches
Loudness Switch
FM Muting Switch and Muting Level
Control
Speaker System Switches
Phones Jack
Tape Monitor Switches, Tape Copy
Switches and Dubbing Jacks

Using Tape Recorders with Your Model 23308

Dubbing Jacks

Tape Monitoring

Making Tape Recordings

How to Make Tape-to-Tape Copies
Making Modified Tape Recordings

Dolby F M Process
Dolby FM Reception
Recording Dolbyized FM Programs

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Technical Description

General

FM Tuner Section
Front End
IF Amplifier
Multipath Indicator
Stereo Demodulator
Muting Circuit

AM Tuner Section

Amplifier Section
Selector Switch
Phono Amplifier
MPX Noise Filter
Balance Control
Volume Control
Tone Circuit
Output Stage and Protective Circuits

Service Notes

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1.

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Fuse Replacement
Cleaning

In Case of Difficulty
Repairs

Repacking for Shipment

Rear Panel Connection Facilities
and Adjustments

. FM Antenna Connection

. AM Ferrite-rod Antenna

. Speaker System Connections

. Front Panel Controls and Jacks

. Three Conductor Phone Plug

. Patch Cord for Dubbing

. Typical Tape Recorder Connections
. Arrangement for Making Modified

Tape Copies

10. Functional Block Diagram

11. Tone Control Characteristics

12. 15 Hz and 9 kHz Filter Characteristics
13. Packing Instructions

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