Technics SH-8055 User manual

ORDER No. HAD85071734
Service Manual
Stereo Graphic Equalizer Equalizer
(With
Spectrum
Analyzer)
S
H
8055
Color
({K).... Black Type
Color Area
{K) | [PA] ...Far East PX
(K)
|
[PE]
...
European
Military
~
f Please use this manual together with the service manual for Model No. SH-8055, Order No. SD83062526C9.
J
CHANGE
Wi REPLACEMENT PARTS LIST
Notes:
(1) Mentioned in this parts list are only those changed in Model No. SH-8055 for destination [PA, PE] area (silver type).
(2) Important safety notice:
Conponents identified by A\ mark have special characteristics important for safety. When replacing any of these
components, use only manufacturer’s specified parts.
Change of Parts No.
Ref.
No.
SH-8055
SH-8055
Part
Name
&
Description
moet
Remarks
[PA,PE]
Silver
Type
P
[PA,PE]
Black
Type
il
RESISTORS
R45, ERD25TJ124 ERD257TJ154 Carbon, 150kQ, 1/4w, +5% 1
R539 ERD25FJ471 ERD25FJ561 Carbon, 56092, 1/4W, 5% 1 Fig. 1
R556 a ERD25FJ472 Carbon, 4.7kQ, 1/4W, +5% 1 Fig. 1
R643~646 ERD25FJ152 ERD25FJ222 Carbon, 2.2kQ,, 1/4W, +5% | 4
CABINET and CHASSIS PARTS.
qT
SGWK210PA SGWK210BA
Front
Panel
7
1
|
a SDUK8 SDUK8—1 Dial Plate 1
3 SGXK75 SGXK75-1 Ornament Cover 1
4 SGXK76 SGXK76-1 Ornament Cover 1
5 SGUK10 SGUK10—1 Transparent Plate 1
6 SGXK74 SGXK74—1 Sub Front Panel 1
8 SBD69—3K SBD69—1 Button, Display Level 1
10 SBC475—1 SBC475 Button 4
26 SKCK110S SKCK110B Cabinet i
SCREWS
N1 XTB3t+8B XTB3+8BFZ Screw, Panel M’tg. 3
Ni2 SNE2095—2 SNE2095—5 Screw, Cabinet M’tg. 4
PACKING PARTS
PI SPGK116 SPGK208 Carton Box 1
P4 ‘SPP699 SPPK47 Polyethylene Bag 1
e Panasonic Tokyo Office
Matsushita Electric Trading Co., Ltd. Matsushita Electric Trading Co., Ltd.
1CS
1-2,
1-chome,
Shiba-koen,
Minato-ku,
Tokyo
105
Japan
P.O.
Box
288,
Central
Osaka
“pen
«
\

!
SH-8055
eae
" BLADDITION OF RESISTOR
BeHVHaeonreee
e601
SVIM 54834P
V4eh SELECTOR
Be O FHmOmeaae
ei go Gi. Ge GND
8
3
gsi 4708
556 47k
port
14ch. SELECTOR
Change Addition
4702 — 5602
Fig. 1
Mi POWER SOURCE CIRCUIT
AC 110/127/220/240V
(60/60H2)
Fig. 2
Printed in Japan
\
,
ook,
“850700830
®
KK

ORDER NO. HAD8510275P0
Parts
Change
Notice
SH—8055
[M,
MC]
Service
Manual
Model
No.
SH—8055
S/K
[E,
EK,
EF,
EB,
EH,
EGA,
XA,
XL]
Order
No:
Sbe30e250969
Please revise the original parts list in the Service Manual to conform to the change (s)
shown herein. If new part numbers are shown, be sure to use them when orderring parts.
Reason for Change *The circled item indicates the reason. If no marking, see the Notes in the bottom column,
1. Improve performance
Change of material or di
Standardization
8. Other
Interchangeability Code **The circled item Indicates the interchangeability. If no marking, see the Notes in the bottom column.
Parts Set Production!
sgt eine Fatty. ! Original or new parts may be used in early or late production set.
Nee ‘Cale | Use original parts until exhausted, then stock new parts.
eS Early } Original parts may be used in early production sets only. New parts may be used in early or late
Nani ak | production sets. Use original parts where possible, then stock new parts.
og Onn Early. | New parts only may be used in early or late production sets.
hee, tte ae {Stock new parts.
ioe Ey | Original parts may be used in early production sets only. New parts may be used in late
New Late | production sets only. Stock both original and new parts.
E Other Hl
Part Number
Model No. Ref. No. | _ Original Part No. New Part No. Part Name & Descriptions
CABINET and CHASSIS PARTS
SH-8055,
3
SGX75
SGX76
7,E
Ornament
1
4 SGX76 SGX75 TE Ornament
—
SH-8055(S/K)
3
SGXK75
SGX76
7E
Ornament
3
SGX75—1
SGX76-1
TE
Ornament
1
4
SGX76 SGX75
7,E
Ornament
1
4
SGX76-1
SGX75—-1
Ornament
File this Parts Change Notice with your copy of the Service Manual.
oe
Matsushita
Service
Company
Panasonic
Hawaii,
Inc.
Matsushita
Electric
Trading
Co,,
Ltd.
50 Meadowland Parkway, 91-238 Kauhi St., Ewa Beach P.O. Box 288, Central Osaka Japan
Secaucus, P.O. Box 774
New Jersey 07004 Honolulu, Hawaii 96808-0774
Panasonic Sales Company, Matsushita Electric
Division of Matsushita Electric of Canada Limited
of Puerto Rico, inc. 5770 Ambier Drive, Mississaugs,
‘Ave. 65 De Infanteria, KM 9.7 Ontario, Law 273 Printed in Japan
Victoria, Industrial Park: 851000400 ® IM
Carolina, Puerto Rico 00630

ORDER NO. HAD8507173A4
ervice
Manual
Stereo Graphic Equalizer eeualizer
(With
Spectrum
Analyzer)
S
H
-
80
55
Color
.
(K)..... Black Type |
Color Area
(K) | [PA] ...Far East PX
(K) | [PE] ... European Military
~
[
Pre
use
this
manual
together
with
the
service
manual
for
Model
No.
SH-8055,
Order
No.
SD83062526C9.
_)
CHANGE
Wi
REPLACEMENT
PARTS
LIST
Notes:
(1)
Mentioned
in
this
parts
list
are
only
those
changed
in
Model
No.
SH—8056
for
destination
[PA,
PE]
area
(silver
type).
{2) Important safety notice:
Conponents
identified
by
A.
mark
have
special
characteristics
important
for
safety.
When
replacing
any
of
these
components,
use
only
manufacturer's
specified
parts.
Change of Parts No.
Ref.
No.
'SH-8055
‘SH-8055
Part
Name
&
Description
leet
Remarks
[PA,PE]
Silver
Type
IPA,PE]
Black
Type
|
RESISTORS
R45
ERD25TJ124
ERD25TJ154
Carbon,
150k,
1/4W,
£5%
i
“4
c
R539
ERD25FJ471
ERD25FJ561
Carbon,
56082,
1/4W,
+5%
1
Fig.
1
R556
ERD25FJ472
Carbon,
4.7kS2,
1/4W,
45%
iz
1
Fig.
1
R643~646
|
ERD25FI152
ERD25FJ222
Carbon,
2.2k82,
1/4W,
45%
4
iz
CABINET
and
CHASSIS
PARTS
1
SGWK210PA
‘SGWK210BA
Front
Panel
1
|
2
‘SDUK8
SDUK8-1
Dial
Plate
i
3
SGXK75
SGXK75—1
Ornament
Cover
cf
4
SGXK76
SGXK76—1
Ornament
Cover
1
=
5
SGUK10
SGUK10—1
Transparent
Plate
1
6
SGXK74
SGXK74—-1
‘Sub
Front
Panel
1
|
8
‘SBD69—3K
‘SBDE69—-1
Button,
Display
Level
1
[
10
SBC475—1
SBC475
Button
4
26
SKCK110S
L
SKCK110B
Cabinet
fe
pay
le
SCREWS
NI
XTBS8B
XTBS+BBFZ
“|
Screw,
Panel
M’tg.
3
NI2
[_
SNE2095—2
‘SNE2095—5
‘Screw,
Cabinet
Mtg.
L
4
a
PACKING
PARTS
PI
‘SPGK116
‘SPGK208
Carton
Box
T
PA
SPP699
‘SPPK47
Polyethylene
Bag
Panasonic Tokyo Office
e@
Matsushita
Electric
Trading
Co.,
Ltd.
Matsushita
Electric
Trading
Co.,
Ltd.
]
1-2,
1-chome,
Shiba-koen,
Minato-ku,
Tokyo
105
Japan
P.O.
Box
288,
Central
Osaka
Japan

Baw S Baeaenete
ic 501
SVIM 54834P
Veen SELECTOR
OADMOBaaa
Rc. Ge GND
OOOO
6502 10v100
Rese 79?
t
agg 4.7K
*
14ch, SELECTOR
Changs Addition
4702 —~ 5602 ; ;
Fig. 1
li POWER SOURCE CIRCUIT
ac ourter
A ‘erowitenes)
Ac 110/127/220/240V
(60/60H2)
Fig. 2
© aPrinted in Japan
50700830 &@ KK

ORDER NO. SD83062526C9—A *
Stereo
Graphic
Equalizer
S
H}-
89
55/SH-
8055
k)
© This booklet contains the specifications for SH-8055, written in Germany, French and Spanish, and the circuits to be
changed according to areas.
© File this manual together with the SH-8055 service manual (Order No. SD83062526C9).
© Das vorliegende Biichlein enthalt die Spezifikationen fiir SH-8055 in deutscher, franzésischer und spanischer Sprache.
© Bewahren Sie das Biichlein zusammen mit der Bedienungsanleitung fiir SH-8055 (Bestell-Nr. SD83062526C9) .
© Cette brochure contient les spécifications pour le SH-8055, écrites en allemand, en frangais et en espagnol.
© Classer ce manuel en méme temps qu’avec le manuel de service du SH-8055 (N° d’ordre : (SD83062526C9).
@ Este librito contiene la especificaciones para SH-8055, escritos en aleman, francés y espafiol.
© Guardar este manual juntamente con el manual de servicio de SH-8055 (Pedido N°. SD83062526C9).
WM CHANGE OF SCHEMATIC DIAGRAM
Power source
For continental Europe For [XA], [PA] and [PE] areas
110/120/220/240V
{180/60 He)
HE TECHNISCHE DATEN spezitikationen Konnen infolge von Verbesserungen ohne Ankundigung geandert werden.)
[ (DIN 45 500) Frequenzgangregler 14+12dB~-12dB
Frequenzgang (12 Regler, stufentos verstellbar)
(mittelstellung drehen) : 5 Hz~100 kHz, —1 dB Mittenfrequenzen 125 Hz, 40'Hz, 63 Hz, 100 Hz, 160 Hz,
Maximalausgangs-
250
Hz,
500-Hz,
1
kHz,
2
kHz,
4
kHz,
spannung
:8V(1
kHz,
THD
0,01%)
8
kHz,
16
kHz
Nennausgangsspan-
Ausgangsspannung
fir
nung
1V
rosa
Rauschen
:50mV
Nennklirrfaktor
1
0,003%
(20
Hz~20
kHz)
Mikrofonempfindlichkeit
:
Gber
—74
dBV/j
bar
(1
kHz)
0.002%
(1
kHz)
Mikrofondampfung
:-20dB
Eingangsspannung
:1V
ALLGEMEINE
DATEN
Gerauschabstand
:
102
dB (110
dB,
IHF,
A)
Stromversorgung
:
Wechselstrom,
110
V/120 V/220
W
Maximaleingangs-
240
V,
50
Hz/60
Hz
spannung
:8V(1
kHz)
Leistungsaufnahme
:17W
Eingangsimpedanz
:47kQ
Abmessungen
Verstarkung
:0+1dB
(HXBXxT)
:108x
430x270
mm
Kanalsy
mmetrie
(4-1/4"
16-15/16"
x
10-5/8")
250
Hz~6300
Hz
:£0,5dB
Gewicht
24,1
kg
(9,0
Ib)
Kanaltrennung1kHz
—:
70
dB
DEUTSCH

ESPANOL
ME
CARACTERISTIQUES
(sujet
a
changement
sans
prearis.)
(DIN 45 500)
Réponse de fréquence
(position centrale)
:5Hz~100
kHz,
-1dB
Tension
de
sortie
maximale
+8V
(1
kHz,
THD
0,01%)
Tension
de
sortie
nominale nV
Distortion harmonique
total
10,003%
(20
Hz~20
kHz)
0,002% (1 kHz)
Sensibilité d’entrée 31
Signal/Bruit
:
102
dB
(110
dB,
IHF’
A)
Tension
d’entrée
maximale :8V (1 kHz)
Impédance d’entrée 147kQ
Gain :0+1dB
Equilibrage de canal
250 Hz~6300 Hz :+0,5dB
Séparation de canal
1kHz :70dB
Commandes de niveau
de
gamme
14+12dB~-12dB
(12 éléments, continuellement
variables)
Fréquences charniéres : 25 Hz, 40 Hz, 63 Hz, 100 Hz,
160 Hz, 250 Hz, 500 Hz, 1 kHz,
2 kHz, 4 kHz, 8 kHz, 16 KHz
Tension de sortie des
bruits roses 750mV
Sensibilité de microphone
compatible
:
plus
de
—74
dBV/pbar
(1
kHz)
Attenuateur de
microphone
gis
20
dB
GENERALITES
Alimentation
CA,
110
V/120
V/220 V/240
V,
50 Hz/60 Hz
Consommation r17W
Dimensions
(hxixpr) :108x430x270 mm
(4-1/4 16-15/16"x 10-5/8")
Poids 14,1kg (9,0 Ib)
HE
ESPECIFICACIONES
estas
especiticaciones
estan
sujetas
9
cuaiquier
cambio
sin
previo
eviso.)
(DIN 45 500)
Respouesta de frecuencia
(posicion
central)
:5Hz~100
kHz,
—1dB
Tensi6n
de
salida
maxima
:8V
(1
kHz,
THD
0.01%)
Tension
de
salida
de
régimen : 1V
Distorsién armonica
total
nominal
1
0.003%
(20
Hz~20
kHz)
0.002% (1 kHz)
Sensibilidad de entrada :1V
Relaciéndsefialruido
:
102
dB
(110
dB,
IHF’
A)
Tensién de entrada
maxima :8V (1 kHz)
Impedanciade entrada: 47kOQ
Ganancia :0+1dB
Equilibrio de canales
250 Hz~6300 Hz 2 £0,5dB
Separacion de canales
1kHz :70dB
Controles de nivel de
banda :+12dB~—12dB
(12 elementos, continuamente
variables)
25 Hz, 40 Hz, 63 Hz, 100 Hz,
160 Hz, 250 Hz, 500 Hz, 1 kHz,
2 kHz, 4 kHz, 8 kHz, 16 KHz
Frecuencia central
Voltaje de salida del
ruido rosado 750mV
Sensibilidad del
micréfono
compatible
:
por
sobre
—74
dBV/ybar
(1
kHz)
Atenuador de microfono : —20 dB
EN GENERAL
Alimentacion de
corriente
:C.A.
de
110
V/120 V/220
V/240
V,
50 Hz/60 Hz
Consumo decorriente :17W
Dimensiones
(altoxanchoxprof.)
:108x430x270
mm
(4-1/4"x 16-15/16"x 10-5/8")
Peso
24,1
kg
(9,0
lb)
Printed in Japan
830609600 ®KK/IM @

*
The
colors
of
this
model
include
silver
and
black,
*
The
black
type
model
is
provided
with
(K)
in
the
Service
Manual.
)
ORDER NO. sD83062526!
Service
Manua
Stereo
Graphic
Equalizer
SH- 8055
[E], [EK], {EF],[EB],[EH], [EGA],
[XA],[XLI,[PA],[PE] [Ei]
SH-8055(k)
(E], [EK], [EF], [EB], [EH],
[EGA],[XA],[XL]
*
[E]
is
available
in
Scandinavia
and
Switzerland,
* [EK] is available in United Kingdom.
* [EF] is available in France.
* [EB] is available in Belgium.
* [EH] is available in Holland.
*
[EGA]
is
available
in
F.R.
Germany.
*
[XA]
is
available
in
Southeast
Asia,
Oceania,
Africa,
Middle
Near
East
and
Central
South
America.
* (XL] is available in Australia,
* [PA] is available in Far East PX,
* [PE] is available in European
*
[Ei]
is
available
in
Italy.
Areas
Specifications
(DIN 45 500)
Frequency response
(center position)
Maximum output
voltage
Rated output voltage
Rated total harmonic
:5 Hz~100 kHz, —1 dB
18V(1 kHz, THD 0.01%)
1V
(Specifications
are
subject
to
change
without
notice
for
further
improvement.)
Band
level
controls
:412dB~—12dB
(12
elements
continuously
variable
per
channel)
225
Hz,
40
Hz,
63
Hz,
100
Hz,
160
Hz,
250
Hz,
500
Hz,
1
kHz,
2
kHz,
4
kHz,
8
kHz,
16
kHz
Center frequency
Pink noise output
distortion
0.003%
(20
Hz~20
kHz)
voltage
:50mV
0.002%
(1
kHz)
Compatible
microphone
input
sensitivity
n1V
sensitivity
:
above
~74.dBV/jbar
(1
kHz)
!
Signal-to-noise
ratio
:
102
dB
(110
dB,
IHF’
A)
Microphone
attenuator
:
—20dB
Maximum
input
voltage
:8V(1kHz)
GENERAL
Input
impedance
:47kQ
Power
supply
AC
110-V/120
V/220 Vi240
V,
Gain
:0+1dB
50
Hz/60
Hz.
Channel
balance
Power
consumption
:17W
>
250
H2~6300
Hz
40.5
dB
Dimensions
Channel
separation
(HxWxD)
2108430270
mm
1
kHz
:70dB
(4-1/4"
16-15/16"x
10-5/8")
Weight
24.1
kg
(9.0
Ib)
@
CONTENTS
SAFETY PRECAUTION
BLOCK
DIAGRAM
OF
FUNCTION
.
LOCATION
OF
CONTROLS
...
+
REAL
TIME
SPECTRUM
ANALYZER
.
PINK NOISE ....
HOW TO USE THE REAL TIME
SPECTRAM ANALYZER
Page
RWWNN
5
DISASSEMBLY
INSTRUCTIONS.........
TOTAL
FREQUENCY
RESPONSE
PRINTED
CIRCUIT
BOARDS
.
REPLACEMENT
PARTS
LIST
.
EXPLODED
VIEW
...
.
SCHEMATIC
DIAGRAM
BLOCK
DIAGRAM
.
SPECTRUM
ANALYZER
AND
TIMING
CHART.
Panasonic Tokyo
Technics
Matsushita Electric Industrial Co., Ltd.
1-2, 1-chome, Shiba-koen, Minato-ku, Tokyo 105 Japan
Matsushita Electric Trading Co., Ltd.
P.O. Box 288, Central Osaka Japary

ACETEES
Mi
SAFETY
PRECAUTIONS
.
Before
servicing,
unplug
the
power
cord
to
prevent
an
electric
shock.
.
When
replacing
parts,
use
only
manufacturer’s
recommended
components
for
safety.
.
Check
the
condition
of
the
power
cord.
Replace
if
wear
or
damage
is
evident.
.
After
servicing,
be
sure
to
restore
the
lead
dress,
insulation
barriers,
insulation
papers,
shields,
etc.
.
Before
returning
the
serviced
equipment
to
the
customer,
be
sure
to
make
the
following
insulation
resistance
test
to
prevent
the
customer
from
being
exposed
to
a
shock
hazard.
ORWNS>
e RUE ATION RESISTANCE TEST
.
Unplug
the
power
cord
and-short
the
two
prongs
of
the
plug
with
a
jumper
wire.
iE Turn on the power switch.
3.
Measure.
the
resistance
value
with
ohmmeter
between
the
jumpered
AC
plug
and
each
exposed
metal
cabinet
part,
such
as
screwheads
antenna,
control
shafts,
handle
brackets,
etc.
Equipment
with
antenna
terminals
should
read
between
3MQ.
and
5.2MG&
to
all
exposed
parts.
(Fig.
A)
Equipment
without
antenna
terminals
should
read
approximately
infinity
to
all exposed
parts.
(Fig.
B)
Note:
Some
exposed
parts
may
be
isolated
from
the
chassis
by
design.
These
will
read
infinity.
Antenna
terminal
Exposed Exposed
metal metal
part part
Ohmmeter
Ohmmeter
(Fig.A) (Fig. B)
Resistance
=
3M2—5.2MQ
Resistance
=
Approx
0O
4,
lf
the
measurement
is
outside
the
specified
limits,
there
is
a
possibility
of
a
shock
hazard.
The
equipment
should
be
repaired
and
rechecked
before
it
is
returned
to
the
customer.
Mi
BLOCK
DIAGRAM
OF
FUNCTION
(display mode)
t inicnok For detail, refer to Block Diagram on page 28.
Line input ©
tapet
Tape deck 1 “playback” O——O
Tape deck 2 “playback” otee2t
Tape deck 1 ‘Rec out”
Equalizer
(mic attenuator)
—20dB OdB
Tape deck 2 ‘Rec out”
Line output O
(display mode)
Reh.
level)

Hi LOCATION OF CONTROLS
12 channel real time spectrum analyzer.
Band level controls (Left channel)
(25Hz ~ 16kHz, divided into 12 band, +12dB)
(25Hz ~ 16kHz, divided into
Band level controls (Right channel)
[ 12 band, #12dB)
Microphone
jack:
left
right
Display level control.
Display mode selector ( Ml off, m= on)
Mic attenuator ( g OdB, = —20dB)
Pink noise generator switch ( @ off, = on)
* Mic Jack of this unit is not for mixing.
input terminals
(From amplifier):
Line output terminals
(To amplifier)
So,
refer
to
the
circuit
diagram
and
the
replacement
parts
list.
M@ REAL TIME SPECTRUM ANALYZER
*This can be used to measure and correct the sound field
frequency response of a listening room and to measure the
frequency components of a sound source.
eThe same 12-band frequency divider as for the band level
controls allows the levels of the frequency components of
voices, music, etc., to be visually displayed.
The “full range” area on the right side displays the combined
level of all of the frequency bands.
The display is in 12 points for each frequency band and a level
width of 30 dB can be displayed.
-qualizer on/off selector
Rec mode selector
( m straight, = EQ)
* Dubbing from tape deck 1 to 2 is possible with tape 1 switch.
** Dubbing from tape deck 2 to 1 is possible with tape 2 switch.
AC outlet (unswitched)
For [XA,PE and PA] area only
Voltage selector
{on the bottom board)
@
The
power
supply
for
this
unit
varies
depending
upon
the
areas.
Also,
the
parts
used
for
power
supply
are
different.
*The real time spectrum analyzer is connected to the output
terminals of this unit. When the equalizer switch is ‘“‘on”, the
level of the corrected source is displayed; when pink noise
switch is “on”, the level of the corrected pink noise is
displayed; when the microphone is connected, the microphone
input level is displayed.
The attack time and recovery time of the display is fast for
source and slow for pink noise; thus the responsiveness to the
‘source is good and the display is easy to see during sound field
correction.

i PINK NOISE
ePink noise is used for measurement and correction of the
sound field frequency response because it is mostly within the
audible range, its energy distribution is uniform, and it has a
the
Response of white noise
oB
(oso
Response of filter
wide frequency band. oy
Because pink noise has large instantaneous level fluctuations, —3dB/oct
display
may
fluctuate.
aes
<Frequency response of pink noise> 3dB/oct
—> 1 —> |
98 1 Response of pink noise
a a 7
Frequency (Hz)
Mi HOW TO USE THE REAL-TIME SPECTRUM ANALYZER
@
With
the
sound
volume
of
amplifier
set
at
minimum,
the
frequency
characteristics
of
sound
sources
such
as
human
voice,
live
music
and
noise
can
be
measured
(displayed
on
spectrum
analyzer)
through
operations
in
numerical
order
as
shown
below.
@
As
the
sound
volume
of
amplifier
is
increased
through
operations
as
shown
below,
the
sound
volume
of
pink
noise
increases,
and then the sound field frequency characteristics can be measured (displayed on spectrum analyzer).
—)
Speaker
Speaker
®
Adjust
the
system
system
volume
to
an
(Left)
(Right)
appropriate
level.
Volume control: “0”
Balance control: “center position”
Excessively
raising
the
amplifier
©
Tone
controls:
O/elt
Ps
aatan|
i
ee
aéidlh
mode
selector
volume
or
the
band
level
controls
of
this
“center
position”
at
‘ie
it
ea
Sion
a
unit
during
measurement
or
correction
input
Suleclor
anak
“tape”
i ici oitetaien yt
aedaroy
er
ete
sa
shasiste
elf
the
amplifier
has
a
tape-monitor
selector
and
the
sound
will
approach
the
limits
of
the
-
input
isan
eat
audible range and be difficult to hear, det cael ee P
thus increasing the likelihood of a be on” (Ma)
mistaken assumption that there is no =
output. i
Recommended
microphone:
RP-3800E
(sold
separately)
©
“on”
(M.
=)
“off?
© “0dB” (mB)
Set
the
switch
on
the
microphone
to
(Change
it
over
according
to
the
“on. sensitivity of microphone.)
(Position
the
microphone
at
the
place
and
Select
the
channel
for
sound
field
measurement
by
height
at
which
you
usually
listen
to
your
setting
to
“on”
(M_
=).
audio equipment.)
@® Adjust the display so that it is easy to see (approximately
the 20-dB level).
(The display at this time shows the sound field frequency
response.)
—

©
Correct
the
sound
field
in
order
as
shown
below
according
to
the
data
obtained
through
measurement
on
page
4.
©
Correct
is
on
each
of
the
channels.
ISpeaker Speaker
system system “0 dB” (Center position)
(Left) (Right)
— K
es aa: 2
Recommended =e
microphone:
RP-3800E
(sold separately)
Use the band level controls to adjust the frequencies
displayed on the spectrum analyzer so that they are
all at the same level.
Make the adjustment so that the band level controls are
centered around the ‘'0 dB” position and are not set too
far in either the ‘+ dB” or ‘‘~ dB” direction.
(After adjustment, the positions of the band level controls
are the ideal listening point.)
(Position the microphone at the same place
and height as it was for the measurement.)
J
(Example
of
sound
field
frequency
response
obtained
through
measurement)
Frequency
response
prior
to
correction
adjustment
euannel
veal
time
spectrum
analyz
pb
80250 00 Wk ak
Frequency (Hz)
(Position
of
the
band
level
controls
after
correction
Frequency
response
after
correction
adjustment
adjustment)
“
Frequency (Hz)
Depending on the listening room, it is not always possible to obtain a perfectly flat response for equalization correction.
When making the correction adjustment, the spectrum analyzer display may not always visually agree with the positions of the band level
controls.
The
microphone
that
should
be
used
with
this
unit
is
the
RP-3800E
(sold
separately).
If
any
other
microphone
is
used,
the
frequency
<Microphone to be used with this unit>
response
displayed
on
the
spectrum
analyzer
may
differ
from
the
actual
sound
field
frequency
response.

Ml
DISASSEMBLY
INSTRUCTIONS
1,
How
to
remove
the
cabinet
1.
Remove
the
screws
(Fig.
1:
@
~
@)
of
the
cabinet.
2.
Remove
the
cabinet.
Rear panel
Cabinet
2.
How
to
remove
the
printed
circuit
board
1.
Romove
the
cabinet.
(Refer
to
“How
to
remove
the
cabinet”)
2.
Remove
the
screws
(Fig.
2:
e~
@®
)
of
the
rear
panel
and
the
bottom
board.
3.
Remove
the
screws
(Fig.
3:
@
~
@)
of
the
main
printed
circuit
board.
4.
Remove
the
stopper
A
(P.C.B.
holder)
of
the
FL
printed
circuit
board.
(Refer
to
Fig.
4)
(Note)
Claw
screws
or
ordinary
screws
(3
x
8
mm)
and
toothed
washers
should
be
used
for
screws
@
and
@.
enh
or
fam
cp
claw Toothed washer
_
2
2
Red screw
(Holder)
Fig. 3
Pash
in
stopper
Lift
up
the
P.C.B.
4
while
pushing
in
the
P.C.B.
>
stopper.
‘Supporter
Fig. 4

Front panel
side chassis,
Right side
chassis
Shift the right-hand chassis
‘outward to release the stopper.
Shift the left hand chassis
outward to release the stopper.
Fig. 5
5.
Shift
the
right
and
left
chassises
outward
as
shown
in
Fig.
5
to
release
the
stoppers
B
and
C
out
of
the
chassis
holes
on
the
front
panel
side.
=
6.
Slightly
draw
out
the
front
panel
toward
you
along
=
Main
with
the
P.C.B.,
then
raise
the
chassis
as
in
Fig.
6
and
==
PCB.
|
Remove
the
P.C.B.
from
check.
=|
the
chassis
along
with
the
*When
checking
the
voltage,
removing
screws
@
and
®
of
=
front
panel.
Fig.
3,
touch
the
ground
side
of
circuit
tester
rod
to
the
ground
line
==
NN
of P.C.B. (power supply circuit terminal (3), etc.) because the chassis =
is
not
grounded.
Front
[|
panel 909000
Ral J
fia ry
=
Fig. 6
@
Front ponel |
3. How to remove the FL P.C.B.
see:
1.
Remove
the
cabinet.
(See
Fig.
1.)
2. Remove screws @) and @ as in Fig. 7.
3. Remove stopper A. (See Fig. 4.)
the direction of the arrow in Fig. 7.
[Screws of @ ~ @: aud] |
4. How to remove front panel
1. Remove the cabinet. (See Fig. 1.)
2.
Remove
screws
(8)
~
@
as
in
Fig.
8.
(For
screws
@®
~
@,
See
Fig.
2.)
3. Remove the front panel from the chassis,
4.
Input
switch
LED
P.C.B.
and
EQ
switch
LED
P.C.B.
are
fitted
to
the
front
panel.
Release
the
claws
as
in
Fig.
9
to
remove
the
P.C.B.
from
the
front
panel.
Fig. 8
4.
Remove
P.C.B.
together
with
FL
from
the
chassis
in
Sepression should
be faced down.

LED P.C.B.
Fig. 9
Fig. 10
6. How to remove band level control P.C.B.
1. Remove the front panel. (See Fig. 8.)
2. Remove th light shielding cloth as in Fig. 11.
3. Remove the 12 screws shown in Fig. 12 to remove
the P.C.B. (It can be removed together with the
knobs.)
* The light shielding cloth and control P.C.B. can be removed
together with the knobs. When removing the knobs, refer to
5. How to remove input select/EO switch
1. Remove the front panel. (See Fig. 8.)
2. Push the claw of the button from the back of front
panel in the direction of the arrow as in Fig. 10 to
shift it out toward the front panel.
Light shielding cloth:
Light guide
plate
Knob
“
Insert
with
short
leg down.
Fig.
11.
z;
Looe
the
knob
with
gate
hole
side
down.
Band
level
control
P.C.B.
setscrews
Fig.
11
3
3
ae
ZI
ess
Wl
fal
san
/
f
as
y
fay
3
Band
level
control
P,C.B.
setscrews
Fig.
12
Wi
TOTAL
FREQUENCY
RESPONSE
Frequency
response
(+12
dB
position)
“ES
Ak
‘a
+
VY
van
a
VAN
i:
a
x
:
ak.
“a
W
¥
a
Mier
tee
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ee
a

i SH-8055 SH-8055 7 aie
(9 Ground (Earth) lines
@ PRINTED CIRCUIT BOARDS
e Band level control P.C.B. of left and right channel
©
Spectrum
analyzer
displ;
[Fe
ee
ee
et
BAND
LEVEL
CONTROLS
(Rch.)
ey
te
BAND
LEVEL
CONTROLS
(Lch.)
|
From
power
supply
Gi)
From@)
muting circuit
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aN
=
a
I
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wih, € oo
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ana e 18} zm cia aig es = Dae
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To Right channel To Ri To Left channe! To Left. channel
fo Right: chani 2tiz~ 1002 BP,
2kble
~t6ble
BPE
ee
oe
(60He>~IbkHe
BPF
He~
N00H2
BPE
©
Terminal
guide
of
transistors,
diodes
and
IC’s
©
Terminal
number
of
FL
(Spectrum
analyzer)
———{
2SA564, 2SA921, : Svinuniadass
SVIHAI2010 | Soesa7e TO BTS 3ep1265 SVITATES59S
16 pins
308 —
SVIM54834P XY)
22 pi
pins e f . rae
B 78
cw.
<
Ms
as
‘
2008
—
—
BOE
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SVD1SR35200F
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SH-8055 SH-8055
2 Ground (Earth) lines
© Spectrum analyzer display P.C.B.
From
@
terminal
of
FL
BPF
circuit
From
power
transformer
From power supply
muting circuit
Blue Black Blue
fo = BAND LEVEL CONTROLS (Lch.)
i aT Rie
[J
is 4
|
|
i
t
|
¢
|
|
|
|
Z
To
Left
channel
To
Left
channel
160Hz~16
kHz
BPF
25Hz~
lo0Hz
BPF
© Terminal number of FL (Spectrum analyzer)
43SE
59S
20a
-
|
2548
—
I
578
2048 S)
182076 3 2
——————_|
1508
2
2
5
g =
—A 048 —
—a
SPECTRUM
ANALIZER
DISPLAY(FL)
548 —
N81RCPH
(w2)25 40 63.—«100«*160«-250« S00 stk «kak BKK full range
PIN
No
[1]?
|
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[6
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[7]
14]
12]
19
[04]
15]
16]
17]
18]
1920]
21]
22
[25]
24]
25]
26]27
[28]
29
]30]3*]32]
33]
34]
38]
36]
97
[98
[99
PIN allel tsi lel.l¢ ol sloisiels|sisisisis Sls isisisinisl als
CONNECTION
|
F|F
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|
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foe)
8
|
1/9131
8/5
|
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8]
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|
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9]
8
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8
[tol
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fal
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|

e Band pass filter, Pink noise generator, AMP FARES TAPE?
Power
source
and
Input/Output
control
P.C.B.
c
[ 1
[
1
ss
,
LINE
IN]
[LINE
our]
[REC
OUT]
[PLAYBACK]
[REC
OUT]
[PLAYBACK]
©
TorLecs
POWER SUPPL\
(EQ)
(tape!) (tape 2)
(source)
CT
-
Ly
J
j7er
om
7 7
7
To
Band
right.
Equalizer
on-off
TE
@
Rec
mode
©
Tg
Band
level
&
Input
selector
@)
echt
Pink
noise]
[Micattenuator]
2)
Toland
jot
Displ
ti
12
13
14)

cAMP cTAPE I COTAPE2—
LINE IN] [Line our] [REC our] [PLAYBACK] [REC OUT | [PLAYBACK]
@) To FLECB
To @® terminal
of FL PCB.
To Band level Pink noise
eA
Mic
attenuator]
38)
(0
Band
/eve/
Display
level
cantrolsiich) [Display mode
Rec mode|
Input selector
) 1 Bond level
(ch) controls
@
(Reh)
13 14
AC LINE
(For (XA, PA,PE) only)
AC Outlet
Blut
To FL P.C.B,
—@® terminal
Bue-Q
Black”
(Voltage selector)
SiH