Marantz SC-7S1 User Manual

Model SC-7S1 User Guide

Stereo Control Amplifier

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE THE COVER (OR BACK)

NO USER-SERVICEABLE PARTS ARE INSIDE

REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user to the presence of
uninsulated “dangerous voltage” within the
product’s enclosure that may be of
sufficient magnitude to constitute a risk of
electric shock to persons.

The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the product.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE.

CAUTION:

WIDE BLADE OF THE PLUG TO THE WIDE SLOT, AND
FULLY INSERT.

TO PREVENT ELECTRIC SHOCK, MATCH THE

IMPORTANT SAFETY

INSTRUCTIONS

READ BEFORE OPERATING EQUIPMENT

This product was designed and manufactured to meet strict quality and safety
standards. There are, however, some installation and operation precautions
which you should be particularly aware of.

1. Read Instructions – All the safety and operating instructions should be read
before the product is operated.

2. Retain Instructions – The safety and operating instructions should be retained
for future reference.

3. Heed Warnings – All warnings on the product and in the operating
instructions should be adhered to.

4. Follow Instructions – All operating and use instructions should be followed.

5. Cleaning – Unplug this product from the wall outlet before cleaning. Do not
use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.

6. Attachments – Do not use attachments not recommended by the product
manufacturer as they may cause hazards.

7. Water and Moisture – Do not use this product near water-for example, near a
bath tub, wash bowl, kitchen sink, or laundry tub, in a wet basement, or near
a swimming pool, and the like.

8. Accessories – Do not place this product on an unstable cart, stand, tripod,
bracket, or table. The product may fall, causing serious injury to a child or
adult, and serious damage to the product. Use only with a cart, stand, tripod,
bracket, or table recommended by the manufacturer, or sold with the product.
Any mounting of the product should follow the manufacturer’s instructions,
and should use a mounting accessory recommended by the manufacturer.

9. A product and cart combination should be moved with care. Quick stops,
excessive force, and uneven surfaces may cause the product and cart
combination to overturn.

10. Ventilation – Slots and openings in the cabinet are provided for ventilation
and to ensure reliable operation of the product and to protect it from
overheating, and these openings must not be blocked or covered. The
openings should never be blocked by placing the product on a bed, sofa, rug,
or other similar surface. This product should not be placed in a built-in
installation such as a bookcase or rack unless proper ventilation is provided
or the manufacturer’s instructions have been adhered to.

11. Power Sources – This product should be operated only from the type of power
source indicated on the marking label. If you are not sure of the type of power
supply in your home, consult your product dealer or local power company. For
products intended to operate from battery power, or other sources, refer to
the operating instructions.

12. Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wide blade of the third
prong is provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.

14. Protective Attachment Plug – The product is equipped with an attachment plug
having overload protection. This is a safety feature. See the Instruction Manual
for replacement or resetting of the protective device. If replacement of the plug is
required, be sure the service technician has used a replacement plug specified by
the manufacturer that has the same overload protection as the original plug.

15. Outdoor Antenna Grounding – If an outside antenna or cable system is
connected to the product, be sure the antenna or cable system is grounded so as
to provide some protection against voltage surges and built-up static charges.
Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information
with regard to proper grounding of the mast and supporting structure, grounding
of the lead-in wire to an antenna discharge unit, size of grounding conductors,
location of antenna-discharge unit, connection to grounding electrodes, and
requirements for the grounding electrode. See Figure 1.

16. Lightning – For added protection for this product during a lightning storm, or when
it is left unattended and unused for long periods of time, unplug it from the wall
outlet and disconnect the antenna or cable system. This will prevent damage to
the product due to lightning and power-line surges.

17. Power Lines – An outside antenna system should not be located in the vicinity of
overhead power lines or other electric light or power circuits, or where it can fall
into such power lines or circuits. When installing an outside antenna system,
extreme care should be taken to keep from touching such power lines or circuits
as contact with them might be fatal.

18. Overloading – Do not overload wall outlets, extension cords, or integral
convenience receptacles as this can result in a risk of fire or electric shock.

19. Object and Liquid Entry – Never push objects of any kind into this product
through openings as they may touch dangerous voltage points or short-out parts
that could result in a fire or electric shock. Never spill liquid of any kind on the
product.

20. Servicing – Do not attempt to service this product yourself as opening or
removing covers may expose you to dangerous voltage or other hazards. Refer
all servicing to qualified service personnel.

21. Damage Requiring Service – Unplug this product from the wall outlet and refer
servicing to qualified service personnel under the following conditions:

a. When the power-supply cord or plug is damaged.
b. If liquid has been spilled, or objects have fallen into the product.
c. If the product has been exposed to rain or water.
d. If the product does not operate normally by following the operating instructions.

Adjust only those controls that are covered by the operating instructions as an
improper adjustment of other controls may result in damage and will often require
extensive work by a qualified technician to restore the product to its normal
operation.

e. If the product has been dropped or damaged in any way, and

f. When the product exhibits a distinct change in performance – this indicates a

need for service.

22. Replacement Parts – When replacement parts are required, be sure the service
technician has used replacement parts specified by the manufacturer or have the
same characteristics as the original part. Unauthorized substitutions may result in
fire, electric shock, or other hazards.

23. Safety Check – Upon completion of any service or repairs to this product, ask the
service technician to perform safety checks to determine that the product is in
proper operating condition.

24. Wall or Ceiling Mounting – The product should be mounted to a wall or ceiling
only as recommended by the manufacturer.

25. Heat – The product should be situated away from heat sources such as radiators,
heat registers, stoves, or other products (including amplifiers) that produce heat.

AC POLARIZED PLUG

13. Power-Cord Protection – Power-supply cords should be routed so that they
are not likely to be walked on or pinched by items placed upon or against
them, paying particular attention to cords at plugs, convenience receptacles,
and the point where they exit from the product.

Table of Contents

1. Instruction for use................................................................................................................. 2

Foreword .................................................................................................................................................................................2

Equipment mains setting ........................................................................................................................................................... 2

Copyright .................................................................................................................................................................................. 2

Precautions ............................................................................................................................................................................... 2

How to use batteries. ................................................................................................................................................................ 2

2. Accessories ........................................................................................................................... 2

3. Main features of this product ............................................................................................... 3

4. Connections........................................................................................................................... 4

Connection 1 Stereo connection ....................................................................................................................................... 4

Balanced terminal ............................................................................................................................................................... 5

Connection 2 Bi-Amp Connection

(Speaker system needs to comply with Bi-Amp connection) ............................................................................................ 6

Bi-Amp (Connection)..........................................................................................................................................................7

Connection 3 Complete Bi-Amp Connection

(Speaker system needs to comply with Bi-Amp connection) ............................................................................................ 8

Complete Bi-Amp connection............................................................................................................................................9

Installing the SACD multi-channel audio speakers........................................................................................................... 10

Connection 4 5.1ch multi-channel connection ............................................................................................................... 11

5. Name and function .............................................................................................................. 12

For use of Remote control ....................................................................................................................................................... 14

6. Standard operation ............................................................................................................. 15

How to Play .......................................................................................................................................................................... 1 5

How to record...................................................................................................................................................................... 1 5

7. How to operate functions and how to set up.................................................................... 16

Attenuate function ............................................................................................................................................................. 1 6

How to set up attenuation level ....................................................................................................................................... 1 6

Trim adjustment function .................................................................................................................................................. 1 7

8. Specification ........................................................................................................................ 19

Specification ........................................................................................................................................................................ 1 9

Dimensions ........................................................................................................................................................................... 1 9

9. Block diagram...................................................................................................................... 19

10.

Trouble shooting ................................................................................................................. 20

11.

Maintenance ........................................................................................................................ 20

1

1. Instruction for use

■ Forew ord

This section must be read before any connection is made
to the mains supply.

■ Equipment mains setting

Your Marantz product has been prepared to comply with
the household power and safety requirements that exist
in your area.
“SC7S1/N1G” version product can be powered by 230
V AC only.
“SC7S1/U1G” version product can be powered by 120
V AC only.

■ Copyright

Recording and playback of any material may require con­sent. For further information refer to the following:

— Copyright Act 1956

— Dramatic and Musical Performers Act 1958

— Performers Protection Acts 1963 and 1972

— any subsequent statutory enactments and orders

■ Precautions

The following precautions should be taken when operat­ing the equipment.

■ How to use batteries

Improper use of batteries may cause the risk of fluid
leakage or explosion.
Be especially careful in the following points.

햲 Insert the batteries with the correct and polarity as indi-

cated inside the battery case.

햳 Do not use a brand-new battery and used battery together.
햴 Dry cell batteries may produce different voltages even when

their shapes are the same. Do not use different types of
batteries together.

햵 Some batteries are rechargeable and some are not. Be sure

to read the caution and instructions described on each bat­tery.

햶 Used batteries should be disposed of in compliance with

the treatment method specified for your local area.

2. Accessories

After opening the cover of the packing box, check that
the following accessories are included.

●

AC Power Cable

●

General Precautions

When installing the equipment ensure that:

— the ventilation holes are not covered;

— air is allowed to circulate freely around the equipment

— it is on a vibration free-surface;

— it will not be exposed to interference from an external

source;

— it will not be exposed to excessive heat, cold, mois

ture or dust;

— it will not be exposed to direct sunlight;

— it will not be exposed to electrostatic discharges

Never place heavy objects on the equipment.
If a foreign body or water does enter the equipment,
contact your nearest dealer or service center.
Do not pull out the plug by pulling on the mains lead, pull from
the plug itself.
It is advisable when leaving the house, or during a thunderstorm,
to disconnect the equipment from the mains supply.

(Model SC7S1/N1G) (Model SC7S1/U1G)

●

Remote Control RC-7S1SC

ATTEXITTRIM MODE

BA

TRIM

BALANCED

SACD/CD

LINE 1 LINE 2

VOLUME

TAPE

RC-7S1SC

●

AAA (R03) Batteries

●

Remote Cable

●

Instruction Manual (this Copy)

2

3. Main features of this product

●

The concept: channel separation for super
wide range & dynamic audio

We think it’s of the utmost importance to extend high
frequency response as well as channel separation so you
can hear the true meaning of “Super Audio.”
This is why we have designed the input and output cir­cuitry, volume control section, and power supply circuits
according to this philosophy.
The result: an astonishing channel separation of over
100dB at 20kHz.

●

Fully balanced control amp with an linear
volume control

The SC-7S1 is a full balanced, two-channel control amp
providing the channel separation you need for Super
Audio. Based on our own high quality four-gang active
volume control we have developed an even better linear
control volume that reduces gang errors from 0 to 100dB,
±0.5dB. By adding an additional HDAM SA (High Defini­tion Amplifier Module), we improved the Common Mode
Reject Ratio (CMRR) dramatically, attaining an incredible
ultra-wide frequency band of 150kHz and succeeded in
producing the perfect control amplifier for Super Audio
CD.

●

HDAM SA

The feedback impedance of the Current Feedback cir­cuit was reduced to its minimum to make it faster. We
developed a new High Definition Amplifier Modules
(HDAM), a separeted module operating as a buffer for
the amplifier. The SC-7S1 has four HDAM SAs on each input­output buffer and another four units on the V/I converter.

●

Choke input system

In the power supply section, the choke input topology
was adopted to drastically reduce rectifier harmonic noise.
This system is especially suitable for a control amplifier
in which very small signal amplification occurs.

●

Floating control bus system

We make it possible to synchronously drive two or more
control amps by using a floating control bus system con­nected to as many as 6 sets of control amplifiers. We
also enable you to trim levels using the remote control,
making it easy to set up the optimal sound field on a
multi-channel configuration. The highest achievable ste­reo performance can be accomplished when a system
configured with two sets of SC-7S1 and four sets of MA­9S1 are connected in a bi-amped mode.
You will experience superb sound with unbelievable chan­nel separation.

3

ATTENUATOR

dB

UNBALANCED

BALANCED

INPUT

SPEAKERS

ATTENUATOR

UNBALANCED

BALANCED

INPUT

SPEAKERS

12

12

REMOTE

CONTROL

PRE OUT

INPUT

REC
OUT

BI­AMP

MODE

BI-AMP

STEREO

ID NO.

BI-AMP

STEREO

4. Connections

Connection 1 Stereo connection

RIGHT

ANALOG

OUTPUTS

UNBALANCED

BALANCED

1 1

SACD Player / CD Player

LEFT

or

SC-7S1

SACD/CD

INPUT

1 LINE 2

BI­AMP

BALANCED

PUSH

PUSH

A

CH

PUSH

PUSH

B

CH

To connect analog output of
FM tuner, VCR.

TAPE

CD Recorder / Tape Deck

5

4

6

3

7

2

8

1

9

10

POWER

L

R

OUTPUT

INPUT

ANALOG

0

ID NO.

1

2

3

Setting 1

4

5

REC
OUT

UNBALANCED

PRE OUT

21

BALANCED

REMOTE
CONTROL

OUT

ID NO.

IN

2

3

4

5

6

MODE

BI-AMP

STEREO

6

MODE

STEREO

Setting STEREO

BI-AMP

or

MA-9S1

or

For L ch For R ch

(

)

-

ATTENUATOR

dB

0

-

3

-

6

-

9

-

12

-

INPUT

BALANCED

UNBALANCED

PUSH PUSH

1 2

1

SPEAKERS

2

This connection can have options i.e. You may connect the units using either balanced or unbalanced
cables to connect your SA CD/CD and control Amp, as well as the SC-7S1 with MA-9S1s. But y ou can not

BALANCED

ATTENUATOR

-

6

-

9

-

12

(

)

-

dB

0

-

3

-

INPUT

UNBALANCED

1 2

1

SPEAKERS

2

inter match.

4

MA-9S1

Connection 1–4 are recommended by Marantz for SC-7S1 with Marantz MA-9S1.
If using the MA-9S1s, Please read the instruction manual for the MA-9S1.
Name and Function → P13

Standard set-up in using Marantz Monaural Power Amp
MA-9S1.
Please refer to this connection in the event of using other Power
Amps also.

●

SC-7S1 doesn't have a Phono equalizer. So in the event of
using a turn table, please use a Phono equalizer to connect
with the SC-7S1.

●

In the event that stereo L ch signal has been wired with A
ch input, the signal will come out of the pre-out of the A ch.
Please pay attention to L ch, R ch if SC-7S1 is connected
with other equipment.

4. Connections

■ Balanced terminal

햲 The balanced output connector uses a XLR connector.
햳 The XLR connector is internally wired in either of the follow-

ing two systems.

1. USA system (Pin 2 = COLD, Pin 3 = HOT)

2. European system (Pin 2 = HOT, Pin 3 = COLD)

햴 The SC-7S1 uses the USA system of 1.

When a preamp or main amplifier adopting the Euro­pean system is connected using a cable with XLR
balanced connectors, the reproduced signal may be
inverted of phase.
In this case, correct the wiring of one of the XLR connec­tors on the extremities of the cable to the USA system by
exchanging the connections of pins 2 and 3. This will make
it possible to play the signal with the correct phase.

5