Accuphase P-7100 User manual

,Xr.upl,or"
STEREO
POWER
AMPLIFIER
p-7100INSTRUCTION
MANUAL
Irm.,
Please
readthis manual
andthe separate
lmportant
SafetyInstructions
thoroughly
before
use,andretain
thesedocumentsfor future reference.

Thank
you
for
purchasing
this
Accuphase
product,
which
is another
manifesra-
tion
of ourefforts
to create
the highest
quality
audio
components.
Thestrictest
controlwasexercised
throughout
theentire
manufacturipgprocess
in producing
thiscomponent-from
basicresearch,
the
selection
of each
part,
assembly,
test-
ing,
datarecording,
uptopacking
and
shipping*so
thatwesupply
a product
with
every
confidence
thatitwill
provide
full
satisfaction
and pride
in ownership.
We arepleased
to heartily
welcome
you
to thefast-growing
Accuphase
circle
of distinguished
audio
enthusiasts
and devotees
of true
souno.
Thismark indicates
animportantinstructionthat must be observed
to prevent
the possibility
of death or injury
to personsor severe
damage to the unit. To ensuresafe use of the product, make sure
that such instructions are fully understood and observed.
Verify
that
thesupplied
accessories
are
complete:
o
Instruction
manual ........
1
o
lmportant
safetyinstructions
..............................
1
.AC power
cord
(2
m).......... ..................
1
AWARNING:
Disregarding
instructions
bearing
thismark
incurs
the
risk
of death
or severe
injury.
ACAUTION:
Disregarding
instructions
bearing
this
mark
incurs
therisk
of light
injury
ordamage
tothe
product.

Verifythatthesuppliedaccessoriesare
complete .lnside
cover
ACAUTIONS'UsagePrecautions ...........'....'3
Front
Panel,RearPanel ..'.........4
NORMAL,
BRIDGE,DUALMONO ..............8
Operationprinciple 9
When bridged mode is used I
Howto switchto bridgedconnection ........
10
Bridgedconnection
diagram .......................
11

1.
AWARNINGS
I gesure
to connectthepower
cordoftheP-7100
only
to anACoutletof
thesamevoltage
asindicated
ontherear
panel
oftheunit.
oThis unitcan be used in areaswith
an AC line frequency
of 50 or 60 Hz.
IHandle thepower cord
withcare,to avoidthedanger
ofelectric
shock
orfire.
o Be sureto connect
the power
cord onlyto an AC outlet
with protective
earthing
connection.
r Useonlythe supplied
power
cord.Never
useanyother
power
cord.
o Nevertouch
theplug withwethands,
o Do not nickor excessively
bend the cord, and do not place heavy
objectson it.
o lf the powercord is damaged,
contact
yourAccuphase
dealer
or an authorizeo
servicestation.
I Donotreplace
thefeetoftheunit.lffastening
screwscomeintocontact
with internal
parts
oftheunit,thereisa riskof electric
shockorfire.
ITo ensure
proper
heat
dissipation,leave
sufficientclearance
(at
least
10
cm)
betweentheunitandother
components
andsurrounding
walls,
etc.
I Do
notplace
anyobject
containingliquid
(vases,
flower
pots,
drinking
cups,bottles
with
cosmeticsorchemicals,
etc.)ontopoftheunit.
lTo prevent
theriskoffireorelectric
shock,never
usetheunitinaloca-
tion
exposedto rain
orhigh levels
ofhumidity.
I Neverinstall
theunitinaclosedrack
orsimilar.lf proper
ventilation
is
notprovided,
overheating
canlead
to damageandfire.
lNever attempt
to remove thetop or bottomplate
ofthe unit.
Othervvise
thereisasevere
riskof electricshockanddamage
to the unit.
I lnthefollowing
cases,immediately
turnoffthepower
anddisconnect
thepowercordfromtheACoutlet.
o The
unithasbeen
exposedtowater
orchemicals.
o A foreign
object
(metal
orflammable
material)has
entered
theunit.
. Fault
orunusualconditionis
detected
(e.9.
smoke
orunusual
smell
is
comingfrom
the
unit).
o The
unitwas
droppedordamaged
externally.
x Simply
settingthe
power
switchtoOFFwillnotfully
disconnect
theunitfrom
the
power
supply.
To
completelyinterrupt
the
power
supply,
disconnectthe
power
cord.
Otherwisethereis
ariskoffire,
electric
shock,anddamage
totheunit.
x lf
there
is
aproblem,
besuretocontactanAccuphase
Service
Stationor
your
Accuphase
dealer.
2

ACAUTIONS
I Installation location
TheP-7100employsnaturalaircooling.Therightandleft
heatsinksandthetoooanelwillfeelhottothetouchdur-
ing
operation.
Thisisnormal
anddoes
not
pose
aproblem
regardingreliability
andperformance.
However,when
choosingan
installationlocation,
you
shouldalwaysob-
servethefollowing
precautions.
. N4akesureto provide
for
proper
aircirculation,andavoid
locationswithhighlevels
ofdustor
humidity.
o Avoidlocations
subjecttodirectsunlight.
o Avoldlocationsclosetoheatingappliances.
o Choose
a level,
stablesurfacethat
isnot
subiecttovi-
brations.
Neverstack the unit directlv on top of a power ampli-
fier or other audio comoonent.
lAlways turn the power to all components off be-
fore connecting or disconnecting any speaker
cables or inpuVoutput cables.
o WheninsertingorremovingRCA{ype
phonoplugs,
the
two
poles
do
notmake
orbreakcontactsimultaneously,
Thismomentarilynon-groundedcondition
causesacur-
rent
surge
(heard
asa loud
pop
noise),
whichcanseri-
ouslydamagethespeakers.
o lf
speakercableisnotconnected
properly,
itmaycome
into
contact
with
thechassisor
withinput
oroutputcon-
nectors.This
cancause
oop
noise
anddamaqetheam-
plif
ier.
IAC power cord connection
Sincethe
P-7100isratedforhigh
power
consumption,
plug
the
power
cordofthe
unitdirectly
into
awall outlet
with
a
sufficlent
power
capacityrating.
ITurn the volume at the preamplifier or similar
down before setting the power switch to OFF.
IDisconnect the power cord plug when not using
the unit for an extended time.
lDo not turn the power switch OFF and then im-
mediately ON again. Wait at least 10seconds, oth-
erwise noise or other problems may occur.
lDo not use contact refreshers or other chemicals
on the input and output jacks, since these can
cause aging in resin parts and lead to damage.
Maintenance
o Before
performing
maintenance,disconnect
the
power
cordfromtheACoutlet.
o lfrequired,cleantheunitcarefullywitha soft,
slightly
moistenedcloth,andthenwipeit
dry.
Neveruse
sol-
vents
orabrasivecleaningagents,sincethesewill
dam-
age
the
finish.
Usage
Precautions
lln some cases,when internal protection circuitry
hasbeentriggered,the output will beshutoff and
the meterillumination
flashesas a warningindi-
cation.
O Thermal protection
lf
dueto
installation
conditionsorotherreasonstheheat
sinktemperatureexceedsacertainthresholdlevel,the
output
isautomatically
cutoffandthemeter
illumination
flashesasawarningindication.
ln
suchacase, turn
power
totheP-7100offandwait
until
theheatsinkshavefully
cooleddown
(several
hours).
Thenturn
power
on
again.Thiswillreset
the
protection
circuitry.
lf
forsome
reason
thetemperaturerisesevenfurther,
causingthe
internal
temperatureofthe
power
transformer
toexceed
the
allowable
tflreshold,thecircuitbreakerin-
tegratedinthe
power
transformer
willbetriggeredand
turn
the
power
offautomatically.
This
breakerresetsitself
whenthetemperaturereturnstonormallevels.
€Abnormal signal protection
When
anabnormalsignalcontainingDC
components
is
inputto
the
P-7100,
theoutput
is
automatically
cutoff
andthemeterilluminationflashes
asawarninoindica-
Iton.
ln
suchacase.turn
oower
totheP-7100offandremove
thecauseofthe
problem.
Then
turn
power
onagain.This
willresetthe
protection
circuitry.

Front
Panel
EuNTSnLANCED/BALANCED
Epo*", Metersffl entoercoNNECTtoN
Bridged
Connection
Indicator
(page
6,10)
RearPanel
EH,rEien
orr
Meter
On/Off
Button
(page
6)
INPUT
InputSelector
Button
(page
6)
POWER
Power Switch
(page 6)
SpeakerTerminals
(page
7)
Echrru
Gain Selector
(page6)
Esprnxrns
Circuit
Breaker
(page7)
2. Naming Of PaftS Fordetaireddescriptions,
preaseseepases6-
11.
InputType
Indicators
(page
6,10)
Errupurs
lnoutConnectors
UNBALANCED/BALANCED
Evoo" detector @nc
int"t
DUALMONO/NORMAUBRIDGE
(page
7,8,11
)(page 7)
{<
This
product
isavailable inversionstor120/230
VAC.Makesurethat
the
voltageshown
onthe
rear
panel
matches
theAClinevoltage
in
your
area.
* Thecapacity
ratingandshape
ofthecircuitbreaker
differaccording
tothe
ACvoltage
inthe
destination
areaoftheunit.
4

3.Gonnection Diagram
* Useshieldedcablesfor
audio
connections
(2-conductor
shielded
cablesforbalancedconnections).
ACAUTIO N :Beforemaking
connections,
besuretoturnthe
power
toattcomponents
off.
NOtg . Take
care
notto mixup leftandright
channels.
a Donotmakeconnectionswithbalancedandunbalanced
cablesto thesamecomoonent
atthesame
time.
Otherwise
ground
loopsmay
occurwhichcancausenoise.
ACpower
cord
(supplied).
Power
requirements
are
shown
onthe
rear
panel.
Balancedcables
(option)
Preamplifier
5
AffiiA
pi,ffio
t@l
t'ffil @
loi:id
,?i}it
@-@-@@@
@@
-@@@@-@
@
@
uii;"""
i.,_.:;."^,;') 1 ",,",,.J,):'""1 J
i Frombalanced
output !

4.Parts
andFunctions
METER
OFF
Meter
On/Off
Button
Button engaged (OFF):
Meters
aredeactivatedandmeterilluminationisout.
Button disengaged{ON)
;
Metersareoperatingandmeterillumination
ison.
INPUT
InputSelectorButton
Servestoselectthetypeofinput
signalconnectedtoINPUTS
@. fne indicationoftneinputtypeindicators@changes
accordinolv.
Button engaged (BALANCED):
Balancedinputis
selectedandthe"BALANCED'LEDlightsup.
Button disengaged(UNBALANCED):
Unbalanced
input
isselectedandthe"UNBAI-ANCED'LEDlights
up.
POWER
Power Switch
Engagethisswitchtoactivate
theamplifier.
Push
oncemore
torelease
theswitchandturntheamplifieroff.For
an
interval
ofaboutfive
secondsafter
oower
isturnedon.therewill
be
nosoundfromthespeakers,
duetotheactionofthemuting
circuit,
GAIN
GainSelector
Lets
you
selecttheamplifier
gain
in4
srages.
MAX
Thisis
the
normal
position,
resultingina gain
of
28
dB.
-3d8, -6d8, -12d8
These
positions
result
inlower
gain
compared
tothe
MAX
setting,andalsoincorrespondinglylowernoise.
Choosing
oneofthese
positions
maybedesirablewhen
usingtheam-
plifier
todrive
midrange
orhigh-rangespeakersin
a multi-
ampedsystem,
whereresidual
noisecanbea problem. The
selector
is
alsoconvenientincaseswheretheuse
of
hioh-
efficiencydriversmakesIevelmatching
difficult.
UNBALANCED/BALANCED
InputType
Indicators
TheseLEDs
showthe
position
selectedwiththeinput
selec-
torbutton
p onthefront
panel.
PowerMeters
The
meterscaleindicates
theoutputlevelin
dB(decibel) and
in
percent
(%).
Themeters
arecalibratedfor
a 2-ohmload
(0
dB
=500
W).With
a4-ohmload,thefigures
mustbehalved,
and
with
an8-ohmload
dividedbyfour.Outputlevelswith
a sine-wavesignalforvariousloads
areshownin
thetable
0etow.
Themeters
are
peak-reading
types,which
enablesthem
to
precisely
follow
the
rapid
changesinamplitude
andfrequency
thatarecommonwithmusic
signals.
Tomakefor
easierreading,thedecay
timeofthemetersis
settoa lowervalue
thantherlsetime.lf
the
program
source
containsnoiseora large
amountoftransients,
the
meter
jndi-
cationandtheauralvolumeimpression
maydiffer
slightly.
* Forinformation
onmeterindication
inbridgedmode,refer
toDaoe9.
BRIDGE
CONNECTION
BridgedGonnectionIndicator
ThisLEDlights
upwhentheBRIDGE
position
has
chosen
with
themodeselector
@ ontherear
panel. been
-40d8:
0.01%

INPUTS
InputConnectors AC
circuit
breaker
Connect
the
preamplifier
output
tothese
jacks.
The
input
se- When
anabnormally
large
current
flows
inthe
amplifier,
for
lector
button
@ must
be set
tothecorrect
position
(BAL- example
dueto
ashort-crrcuit
in
thespeaker
wiring,
thecircuit
ANCED
or
UNBALANCED),
depending
onwhich
input
isused. breakerwill
betriggered
(breaker
tip
jumps
out).
(MNtr,
Conventional
unbalanced
input
@Ntr'
lf
the
preamplifier
has
a balanced
output,
connectit
tothese
lacKS.
Balanced
signal
transmission
isnot
susceptible
tonoise
in-
terference
andoffers
superior
sound
quality.
The
pin
assignment
is
asfollows.
O :Ground
@: Inverted(-)
O : Non-inverted(+)
Make
surethat
the
preamplifier
output
uses
thesame
pin
as-
signments.
x Balanced
audiocables
areavailable
from
Accupnase. AC Inlet
Insert
thesupplied
power
cord
plug
into
this
connector
and
plug
the
otherendinto
awall
ACoutlet,
SPEAKERS
SpeakerTerminals
Servefor
connection
totheloudsoeakers.
x Usespeakers
with
animpedance
between
2and16ohms
Mode Selector
Setthisselector
to
theappropriate
position
for
dualmono/
stereo/bridged
operation.
AWARNING
Openingthe unit is dangerous
lf the circuit
breaker
istriggered,
thecause
maybe an
internal
malfunction.
Donot attemptanyrepairs.
Besure
to contact
theAccuphase
QualityAssurance
Department
oryour Accuphase
dealer.
AWARNING
oThe
shapeof
theACinlet
andthe
plug
of
thesupplied
power
corddepend
on
thedestination
country
ofthe
unit.
Usingany
othertype
ofcable
except
thesupplied
power
cord
poses
the
risk
offire
anddamage.
oThisproduct
is
available
inversions
for 1201230
VAC.Make
sure
thatthevoltage
shown
ontherear
panel
matches
theAC
line
voltagern
your
area.
For
details,
see
page
8
QIIIEUE :This
position
is
suitabte
fora bi-amping
setup
Crufl! :This
position
isfor
normal
stereo
operation.
GtrEED :This
position
isfor
bridged
operation.

5.Using
theMode
Selector
Themodeselector
@on the
rear
panel
allows
matching
the
operationmodeoftheP-7100
tothesystem
requirements
(dual
mono/stereo/brid
ged).
AC A U T IO N ffn:"i::::[.'
J,:?:iffi
",:'-':,",Ti,.T#?3f"#:'
c
h
an
g
n
s
an
v
DUALMONtrSRIDGE
TheP-7100
operates
asa monophonic
power
amplifier.Forstereooperatlon,twounitsarerequired.
Forinformationonbridgedconnection,see
pages
9-
11.
In
this
position,
theP-7100outputsthesamesignalfromboththeLEFTandRIGHTspeaker
terminals.Thiscanbeused
for
a bi-ampingsetup
whereindividual
speakerunitsaredriven
separately.
DuALMondRDcE lnput Speakerterminals(same
signalat LEFT and RIGHT)
*Any
signalat
theRIGHTinputwillnot
besupplied
tothe
output.
o
UsetheLEFT
input
connectors
forbothP-7100units.
oIna bi-ampedsetup,thespeaker
unitsfortheLOWfrequencyrangeandHIGHfrequencyrangeare
drivenbyseparate
amplifiers.A speakerwitha built-incrossover
network
andseparate
inputsfor
LOW
and
HIGHrangeisrequired,
Connectionexampleforbi-ampingsetup
Gffiitffii t#+;trtil GIGETFI
GE|llilil for leftchannel Leftloudspeaker
GIICIIIGT
GEilllill for right channel Rightloudspeaker
*n""
trl
NORMAT
DUAT"M0NORTDGE Thisisthe
position
fornormal
playback
operation.
For
information
onconnections,see
page
5.
*<
Theunitisshippedfromthefactorywiththeselector
in
this
position

6.Bridged Gonnection
ACAUT I
O N,'""lffi
;'Jf*:ii::iri:tr::ff"H:"'
besure
lfthesamesignal
is
fedtothetwochannelsofa2-channel
(stereo)
power
ampllfierwith
opposite
phase,
thechannels
will
operate
in
push-pull
mode.Thismeans
thattheamplifiernowoperatesasamonopho-
nic
amplifiercapableofmuchhigher
(fourfold)power
output.
Themode
selectoron
therear
panel
ofthe
P-7100makes
thisconnection
internally
whensettoBRIDGE.
o ln
bridged
mode,
theamplifierbecomesamonophonic amplifier.
o Forstereooperation,twoP-7100unitsarerequired.
I Load impedance is half the actual impedance
In
bridged
mode,theloadimpedancein
onechannel
ishalf
theactual
impedance.
Therefore,ifan
8-ohmspeaker
is
connected,eachchannelseesanimpedanceof4ohms;i.e.itoperates
as
if
driving
a4-ohm speaker.
When
usingthe
P-7100inbridgedmode,
you
shouldusespeakers
with
an
impedance
of4ohmsor
higher
lGain
In
conventional
designs,
switchingtobridgedoperation
means
thatthe
voltage
appliedtothespeaker
isdoubled,i.e.that
gain
increasesbyafactorof2,Sincethiscan
be
inconvenientin
actualoperation,
the
P-7100is
designedto
maintain
constant
gain
innormal
orbridgedmode.
f Power meter indication
Themeterindicationfor
the
left
and
right
channelisin
principle
identicaliftheinputisasine-wave
signal.
In
actualuse,the
meterreadingswill
differ
when
theamplifierreproducesmusicalsignals
whichcontaintransientsandunsymmetricalwaveforms.
oThe
power
suppliedtothespeakers
is
6 dB (inpower
value
fourtimes)higherthaninstereo
ooeration.
oCompared
to8ohms,
power
into4
ohms
is
doubled,andinto16ohmshalved.
Meterindication 4-ohmload 8-ohm load 16-ohmload
0dB 1,000w 500w 250W
-10d8 100w 50w 25W
-20dB 10w 5W 2.5W
-30dB 1W 500mW 250mW
-40d8 100mW 50mW 25mW

a
f
I SetthePOWERswitch
oftheP-7100to OFF.
2 Set
the
mode
selector
@ ontherear
panelto
BR|DGE.
Connect
theinput
signal
totheLEFT
sideINPUTSconnector
(UNBALANCED
or
BALANCED).
Connecttheloudspeaker
asfollows.
SPEAKERSLEFT
O terminalof
P-7100 <+ O terminalon
speaker
SPEAKERSRIGHT
() terminalofP-7100
<+ C terminal
onspeaker
* Note:
Leavethe
SPEAKERS
C terminals
ontheP-7100
unconnected.
Turn
power
totheP-7100onand
selecttheinputtype
withtheinput
selector
button
El onthefront
panel(BALANCED
orUNBALANCED).
* Verifythatthe
bridgedconnectionindicator
f i. lit.
Panel
operationandindicators
When
bridgedconnectionis
used,
theP-71
00operates
asamonophonic
amplifier.
Inputtype Bridgeconnection
indicatorfl
The
LEDfortheinputtype
selectedwiththeinout
selector
button
@ lights
up.
Lightsupwhen
modeselector
@
onrear
oanel
issettoBRIDGE.
o
BRIDGE
CONNECTION
Input
signal
ToLEFTinput
connector
lriErl
GIGITT'
PressINPUT
button to select
UNBALANCED
oT
BALANCED
10
Inputselectorbutton
p
Loudspeaker

ACA U T IO N n*'""-""T?j
:i'::%:::::*
""?l
"
""
i
o
ns'
besureto
turn
Note oFor stereo
operation,
twoP-7100
units
arerequired.
.Use theLEFT
input
connectors
for
bothP-7100
units.
(Do
not
connect
anything
tothe
RIGHTinouts.)
o Do
notmake
connections
with
balanced
and
unbalanced
cables
tothe
same
component
atthe
sametime.
otherwise
ground
loops
may
occur
which
can
causenorse.
Left
loudspeaker
/.iffiqa
.l"*.**'..\
t#H--.|
Ii:'H-l @
l@L_________J@l
3!'li"
E-,/:;;-N
trJelkije
-"--:lo--.f.
Right
Ioudspeaker
AIffiIA
.,W
| ,-.FL. rc* '. - |
lfft;-]
ry @
ld-@l
3!i$
r=-l ,,f'_N
l[J l@llo
o
oil@
e -\-2l
-*-i-roF
NORMAL
DUAtMoNtrSR'DGE
Mode
selector@
Setto BRIDGE
To LEFT
input
connectol To LEFI
input.
connedor
!
I
I
Mode
selector@
Setto BRIDGE
.:.l-}:
Preamplifier
* Use
shielded
cables
for
audio
connections
(2-conductor
shielded
cables
for
balanced
Connections). Auoro
caotes
' withRCAtype
ptugs
(option)
11

7.Guaranteed
Specifications
(Guaranteed
specificationsaremeasured
according
toEIA standardRS-490.)
ContinuousAverageOutput Power (20
- 20,000Hz)
Stereooperation
(both
channelsdriven)
1
,000
watts
per
channelinto1ohm
(x
)
5OOrru:ttqnor nl-1g11gl
intO
2 OhmS
250watts
oer
channelinto4ohms
125watts
oer
channelinto
8ohms
Monophonic
operation
(bridged
connection)
2,000
wattsinto2ohm
(x)
1,000
wattsinto4 ohms
500
watts
into8 ohms
Note:Loadratingsmarked
1x;apply
onlytooperationwith
musicsignals.
Total Harmonic Distortion
Stereooperation
(both
channels
driven)
0.05% with2ohmload
O.03% with4to 16ohmload
Monophonic
operation
(bridged
connection)
0.03% with 4to16ohmload
IntermodulationDistortion
o.o1%
Gain(with GAINselector at MAX)
28.0dB
(in
stereo
andmonophonic
operation)
Gainselection
MAX,-3d8, 6dB,-12d8
Output Load impedance
Stereooperation: 2to 16ohms
Monophonic
ooeration: 4
to16ohms
*Withmusic
signalsonly,1-ohmloads
are
permissible
for
stereooperation
and2-ohmloadsfor
monophonic
o0eration.
Damping
Factor
300
(stereo/monophonic
operation)
InputSensitivity
(with8-ohm load)
Qfaron nnorelinn
1.26Y for
ratedoutput
0.11
V for1watt
output
Monophonic
operation
2.52V Iorrated
output
0.11V for1watt
output
Inputlmpedance
Balanced :40kilohms
Unbalanced: 20kilohms
Signal-to-NoiseRatio(A-weighted,
input shorted)
122dB
(GAIN
selectorinMAX
position)
127
dB
(GAIN
selectorin 12dB
position)
At rated
output
Output LevelMeters
Logarithmic
scale,withdefeat
switch
- 60
dBto * 3 dB
(indication
in%)
Power Requirements
AC120Vl23OV,50/60Hz
(Voltage
as indicated
on rear
panel)
Power
Consumption
135
wattsidle
945wattsin
accordancewithIEC-60065
Maximum
dimensions
465mm
(18-5/16')
width
258mm
(10-3/16
) height
545mm (21-7116
) depth
Mass
49.0kg
(108.0
lbs.)net
58.0kg (127.9 lbs.)
inshipping
carton
FrequencyResponse
Atrated
output " 20
-2o,ooo
Hz
At1watt
output: 0.5
- 160,000
Hz +0,
-0.2
dB
+0,
-3.0
dB
*Specifications
anddesign
aresubjectto changewithoutnoticefor improvements.
12

8.Performance
Graphs
OutputPowervs.THD
(8-ohm
load,stereooperation)
Output
Powervs.THD
(4-ohm
load,monophonic
operation)
OutoutPowervs.THD
(2-ohm
load,stereooperation)
Frequency
Response
(8-ohm
load,stereo
operation,1W output)
Tfl vs.
0utpu.t Pouer
-:lkHz
---- t?@kqz
nCC!PHA9ELab- Inc.
t! ion laaw lkN
0utp!t !o!ef
Input : !NBcL-eNctD
0utput:
Comm€nt:!r:!aE
Load impedanc€:
4 ohm
Har 0utF!t Poue.
?gHz:1245,38W
lkHz:1256-95!
?0[Fz:14S9,82h
------- tzqNz
FRIOUI NC
Y
RTSPONSE
DEGREE
Cuto{{ Ffeq0ency:
158,49kHz
-3.€9 dB
2A.AAdB
l! dB
6s6
oB
10k
FREoUENCYIN Hz
13

9.Block
Diagram
'z,
tz\
-a=
z
z
ofi
E@
o
H2
E<
U
z
z
L!U
1b
oo
>c
5d
>tr
o
: <O
trH*<
ti z<
LE
ip
$E
!:3
"::,4 E ?
=d9== 1 fr
ff 968 i C =
S EHi i + x
SEFEE H S
o
oo
u2
91
ie 2-L
o
od
uz
9g
<i *5
tl
,z
6+d
I
a
a
a
I
tl
:'
dr
or
Za
el
FT
trr
h'
dl
cl
-J
!E
f,v
CU
-6
qi33
9EE;
B
14

10.Troubleshooting
lfthereseemsto bea problem withtheunit,
please
checkthefollowing
points
iirst.lftheproblem
persists,
contact
your
Accuphasedealeroranauthorized
servicestation.
ACAU T IO N',T:ru1ffi ::,:Honnections'
be
sure
to
turnthe
power
o ls
the
power
cord
plugged
incorrectly?
o
Aresourcecomponents
and
power
amplifierturned
on?
o
Arethe
preamplifier
and
the
loudspeakers
connectedcorrectly?
o ls
the
input
selectorbuttonsettothe
correct
position?
o
Are
allcomponentsandtheloudspeakers
connectedcorrectly?
o
Are
switchesandselectorsatthepreamplifier
andothersourcecomponents
setcor-
rectly
(especially
thebalancecontrol)?
o
Tryreversing
the
left
andrightspeakercables.
Still
nosoundin
thesamechannel:Checkthe
cablesandtheloudspeakeritself.
Nosoundintheotherchannel : P-7100
orsourcecomponentmay
bedefective.
o
Tryreversing
the
left
andrightinputcables.
Stillnosoundin
thesamechannel: P-7100mavbedefective.
No
soundintheotherchannel Cablesorpreamplifier
may
bedefective
. In
somecases,whentheinternal
protection
circuitryhasbeentrlggered,
theoutputwill
beshutoffandthemeterllluminatlonflashes
asawarning indication.
Formoreinformation,
see
"Usage
Precautions"
onpage 3.
oCheckwhether
speaker
polarity
(
+ ,- )isnotreversedin onechannel.
oForstereo
playback,
verify
thatthemodeselectorontherear
panel
issettoNORMAL.
15

ACCUFH ASE LAEIOR,A-TOF}/, NC.
2-14-.1O,
SHI
N-ISH
IKAWA
AOBA-KU,
YOKOHAMA
225-8508,Japan
82O-2240-00(K1)
FO61X PRINTED
INJAPAN