Yamaha A-S2000 - Amplifier User manual

HiFi Began with Yalllaha
Yamaha's involvement with and passion for music goes back
more than acentury, to when we built our first reed organ in
1887. Now we are the world's leading producer
of pianos and
other musical instruments, and are involved with music
in many
other ways as well.
We manufacture professional recording
equipment, we design concert halls and we assist artists at
concerts with set up and sound tuning.
This knowledge and experience benefits our production
of
audio components in many ways. We introduced our first HiFi
(High Fidelity) turntable
in 1954. Thereafter we were one of the first
to offer mass-produced, high quality audio equipment,
and introduced many legendary stereo components.
We hope you enjoy the genuine HiFi experience of
Yamaha Natural Sound.

Excellence in Audio Achievement
1920- j
1970s t
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First HiFi System introduced in 1920
We introduced numerous HiFi components
(turntables, FM/AM tuners, integrated
amplifiers, preamplifiers, power amplifiers
and speakers) in 1955 -1965.
Natural Sound Speaker Series introduced
in 1967
NS-20 Monitor Speaker
CA-1000 Integrated Amplifier
Featuring A-Class operation, the CA-l 000 set
the standard for integrated amplifiers.
NS-690 Monitor Speaker
NS-1000M Monitor Speaker
Atruly legendary speaker still revered by HiFi
enthusiasts.
B-1 Power Amplifier
An innovative power amp that used FETs in all
stages.
C-2 Control Amplifier
Received top prize at the Milan International Music
and HiFi Show.
NS-1 OM Studio Monitor Speaker
Became of the most popular studio monitors
in the world.
NS-2D
NS-69D
B·l
CA·10DO
NS-l0DOM
C·2
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CX·1DDDO
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Soavo·l
B-6 Power Amplifier
Pyramid-shaped power amplifier.
GT-2000/L Turntable
First CD Player (CD-1) introduced in 1983
B-2x Power Amplifier
MX-10000 Power Amplifier and
CX-10000 Control Amplifier
Redefined the capabilities of separate components.
A-1 Integrated Amplifier
PX-2 Turntable
Yamaha's first straight arm turntable.
AX-1 Integrated Amplifier
GT-CD1 CD Player
MX-1 Power Amplifier and
CX-1 Preamplifier
Soavo-1 and Soavo-2 Natural Sound
Speaker Systems
A-S2000 Stereo Amplifier and
CD-S2000 Super Audio CD Player
1980s
1990s
2000s t
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A-52000
•Fullfloating and balanced circuit design achieves for thefirst time the
fullpo~ntialofanawgueamplij1cation
An entirely new floating and balanced power amp achieves complete symmetry and permits full balanced transmission
(amplification) from the input
jack to just before the speaker jack
•Full-stage balancedsignal transmission
The world's first integrated amp to offer full stage balanced transmission, combining high power output with good sound
texture and outstanding SIN performance
•Floating andbalancedpower amp
•Fully balanced control amp
•Fully balanceddigital volume and tone controls
•Four large capacitypowersupplies
•Symmetrical construction
•Headphone ampfor low impedance drive
•Supplied accessories
Please check that you have received all of the following parts.
•Remote control
•Batteries (AA, R6, UM-3)
(x2)
• Power cable
•Safety brochure
Contents
Controls and functions 6
Connections 14
Specifications 20
Troubleshooting 24
•About this manual
• :'41< indicates atip for your operation.
•This manual
is printed prior to production. Design and specifications are subject to change in part as aresult of improvements. etc. In
case of differences between the manual and the product. the product has priority.
•The color
of images in this manual may vary fi·om the original.
•Read the safety brochure before using Ihis unit.
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SPEAKERS
O~A+B
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•Front panel (left side)
@YAMAHA
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POWER PHONES --- TRIM
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B
G) POWER
Press upward or downward to turn on or off this unit.
The POWER indicator above lights up when this unit is turned
on.
Notes
• If the POWER indicator tlashes when you turn on this unit,
disconnect the AC power cable and contact the nearest
authorized Yamaha dealer or service center (see page 24).
•
When you turn on this unit, there will be afew second delay
before this unit can reproduce sound.
6En
®Remote control sensor
Receives signals from the remote control.
The remote control transmits adirectional infrared beam.
Be sure to
aim the remote control directly at the remote
control
sensor on the front panel of this unit during
operation.
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@PHONES jack
Outputs audio for private listening with headphones.
Note
When headphones are plugged in:
- Both speaker sets connected to the SPEAKERS LlR CH A
and Bterminals are turned
off.
No signals are output at the PRE OUT jacks, while signals are
output at the
REC jacks.
You cannot select MAIN DIRECT as the input source.
If headphones are plugged into the PHONES jack while
MAl DIRECT is selected as the input source, no audio is
output at the PHONES jack.
@TRIM
Adjusts the volume level when headphones are plugged in
to avoid sudden changes in volume.
Choices:
-6 dB, 0 dB, +6 dB, + 12 dB
®SPEAKERS
Turns on or offthe speaker set connected to the
SPEAKERS L/R
CH Aand/or Bterminals on the rear
panel.
•Switch
to the OFF position to turn offboth speaker
sets.
•Switch
to the Aor Bposition to turn on the speaker set
connected
to the SPEAKERS L/R CH Aor B
terminals.
•Switch
to the A+B BI-WIRING position to turn on
both speaker sets.
Caution
If you use two sets (A and B), the impedance of each speaker
must
be 8nor higher.
7En I

•Front panel (right side)
@YAMAHA
BASS
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® BASS
Increases or decreases the low frequency response. The 0
position
produces aflat response.
Control range:
-10 dB to +10 dB
(J) TREBLE
Increases or decreases the high frequency response. The 0
position
produces aflat response.
Control range:
-10 dB to +I0 dB
Notes
•When both the BASS and TREBLE controls are set to the 0
position, audio signal bypasses the tone control circuitry.
•The BASS and TREBLE controls
do not affect the signals input
at the MAIN DIRECTjacks and signals output
at the REC OUT
jacks.
8En
@ BALANCE
Adjusts the audio output balance of the left and right
speakers to compensate for sound imbalances
caused by
speaker locations or listening room conditions.
Note
The BALANCE control does not affect the signals input at the
MAIN DIRECT jacks and signals output at the REC OUT jacks.
®PHONO
Selects the type of magnetic cartridge of the turntable
connected to the
PHONO jacks on the rear panel.
•Press upward to the MM position when the connected
turntable has amoving magnet
(MM) cartridge.
•Press
downward to the MC position when the
connected turntable has amoving coil (MC) cartridge.
•When you replace the cartridge, be sure to turn otTthis
unit.

MAIN DIRECT 0
OPHONO
0 0 0
+lR
0
PHONO AUDIO MUTE
MM
TREBLE
7
BALANCE
8 9
MC
INPUT
CDBAl
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10
VOLUME
11
@INPUT selector
Selects the input source you want to listen to.
The audio signals
of the selected input source are also
output at the REC jacks.
Notes
•Switch to the CD SAL position to select the CD player
connected
to the CD SALjacks (balanced XLR jacks).
•Switch to the CD position
to select the CD player connected to
the CD jacks (unbalanced RCA jacks).
•Switch
to the MAIN DIRECT position to select the component
connected
to the MAIN IN jacks. When MAIN DIRECT is
selected as the input source, no signals are output at the PRE
OUT, REC, and PHONES jacks.
(jJ) AUDIO MUTE
Press downward to reduce the current volume level by
approximately 20 dB. Press again to restore the audio
output to the previous volume level.
,',
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•The AUDIO MUTE indicator lights up while the mute function
IS on .
•
You can also rotate VOLUME on the front panel or press
VOL
+1- on the remote control to resume the audio output.
©VOLUME
Controls the volume level. This does not affect the REC
level.
Note
The VOLUME control does not affect when you select MAIN
DIRECT as the input source. Adjust the volume level using the
volume control
on the extemal amplifier connected to the MAIN
DIRECT jacks.
9En

A-52000
Controls and functions
•Rear panel
ep
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SPEAKERS R CH LINE2
I±J
CD
TUNER LINE 1 PB REC
SAL
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III
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CD
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GND
PHONO
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See page 14 for connection information. ®PRE
OUT jacks
CD SPEAKERS LlR CH terminals
®INPUT jacks
@ L1NE2 jacks
@MAIN IN jacks
Note
Adjust the volume level using the volume control on the external
amplifier connected to the MAIN DIRECT jacks when you select
MAIN DIRECT as the input source.
Notes
•When you connect audio pin plugs to the PRE OUT jacks to
drive the speakers using an external amplifier, it is not
necessary to use the SPEAKERS LlR CH terminals.
• The signal output at the PRE OUT jacks are affected by the tone
control settings.
• The PRE OUT jacks output the same channel signal as the
SPEAKERS LlR CH terminals.
•When you use asubwoofer, connect it to the PRE OUT jacks
and speakers to the SPEAKERS LlR CH terminals.
10 En