Akai AT-S55/L User manual
FM/AM
QUARTZ
SYNTHESIZER
TUNER
mov.
AT=-$55/L
STEREO
INTEGRATED
AMPLIFIER
mopLAM=U55/J
AT-S55/L
AM-U55/J
FM/AM
QUARTZ
SYNTHESIZER
TUNER
moveLAT-S55/L
STEREO
INTEGRATED
AMPLIFIER
mops.
AM-U55/J
THIS
MANUAL
IS
ALSO
APPLICABLE
TO
BLACK
PANEL
MODELS
SECTION
1
MODEL
AT-S55/L
SERVICE
MANUAL
.....
3
SECTION
2
MODEL
AM-U55/J
SERVICE
MANUAL
.....
25
SECTION
3.
PARTS
EIST
coi
caw
ac
cee
ee
eee
sce
aiwed
49
SECTION
4
SCHEMATIC
DIAGRAM
.................
61
aes
AS
<FRRFS
SECTION
1
SERVICE
MANUAL
MODEL
AT-S55/L
TABLE
OF
CONTENTS
SPECIFICATIONS
..
1...
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PARTS
LOCATION
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VOLTAGE
CONVERSION
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ADJUSTMENTS
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1.
AM
(AT-S55L:
MW)
SECTION
ADJUSTMENTS
1...
0.0...
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12
2.
LW
SECTION
ADJUSTMENTS
.
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13
3.
FM
SECTION
ADJUSTMENTS
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14
.
CLASSIFICATION
OF
VARIOUS
P.C
BOARDS
...
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eens
16
1.
P.C
BOARD
TITLES
AND
IDENTIFICATION
NUMBERS
...........
cece
ee
eee
ee
eens
16
2.
MODEL
AT-S55;
COMPOSITION
OF
VARIOUS
P.C
BOARDS
.........
ce
ee
ee
eee
ees
17
3.
MODEL
AT-S55L;
COMPOSITION
OF
VARIOUS
P.C
BOARDS
........
2.
cece
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ee
ees
21
For
basic
adjustments,
measuring
methods,
and
operating
principles,
refer
to
GENERAL
TECHNICAL
MANUAL.
|.
SPECIFICATIONS
FM
TUNER
SECTION
TUNING
FREQUENCY
RANGE
87.4MHz
to
108.1MHz
USABLE
SENSITIVITY
(300
ohms)
1.9uV
CAPTURE
RATIO
1.3dB
SELECTIVITY
(HF,
400kHz)
65dB
IMAGE
REJECTION
80dB
AM
SUPPRESSION
60dB
SUB
CARRIER
SUPPRESSION
60dB
S/N
RATIO
(MONO/STEREO)
75dB/65dB
T.H.D.
(MONO/STEREO)
STEREO
SEPARATION
(1kHz)
MUTING
LEVEL
AM
TUNER
SECTION
(AT-S55L:MW)
0.1%/0.15%
50dB
TUNING
FREQUENCY
RANGE
USABLE
SENSITIVITY
(BAR)
22dB
530kHz
to
1,610kHz
for
U.S.A.
and
Canada
522kHz
to
1,611kHz
for
other
countries
100uV/m
(EXT.)
10uV
SELECTIVITY
(IHF)
30dB
IMAGE
REJECTION
48dB
IF
REJECTION
75dB
S/N
RATIO
55dB
T.H.D.
0.3%
LW
TUNER
SECTION
(AT-S55L
ONLY)
TUNING
FREQUENCY
RANGE
137kHz
to
362kHz
USABLE
SENSITIVITY
(BAR)
200uV/m
EXT.)
20uV
SELECTIVITY
(IHF
30dB
IMAGE
REJECTION
48dB
IF
REJECTION
75dB
S/N
RATIO
55dB
T.H.D.
0.3%
OUTPUT
SECTION
OUTPUT
LEVEL
FM
(100%
MOD.)
775mV
AM
(30%
MOD.)
250mV
>
POWER
CONSUMPTION
|_20
Watts
POWER
REQUIREMENTS
|
120V,
60Hz
for
Canada
and
U.S.A.
220V,
50Hz
for
Europe
except
UK
240V,
50Hz
for
UK
and
Australia
110V/220V/240V,
50/60Hz
internally
switchable
for
the
other
countries
DIMENSIONS
440(W)
x
105(H)
x
327(D)
mm
17.3
x
4.1
x
12.9
inches
WEIGHT
5.4
kg
(11.2
Ibs)
*
For
improvement
purposes,
specifications
and
design
are
subject
to
change
without
notice.
i.
DISMANTLING
OF
UNIT
AT-S55/L
In
case
of
trouble,
etc.
necessitating
dismantling,
please
dismantle
in
the
order
shown
in
the
photo-
graphs.
Reassemble
in
reverse
order.
SCREWS
SCREWS
SCREWS
FRONT
PANEL
SCREWS
UPPER
COVER
SCREWS
it.
CONTROLS
mbostwo.
AT-S55
‘AG
T20V
s6OHZ
20W
Fig.
1
Controls
POWER
SWITCH
12.
BAND
SWITCHES
AND
INDICATORS
1.
2.
PRESET
STATION
KEYS
AND
INDICATORS
13.
AM
ANTENNA
(ANT)
SELECTOR
(AT-S55L
ONLY)
3.
DIGITAL
LED
DISPLAY
14.
AMLOCATION
SELECTOR
4.
SIGNAL
STRENGTH
INDICATORS
15.
FM
LOCATION
SELECTOR
5.
FM
TUNING
INDICATOR
16.
FM/AM
ANTENNA
TERMINALS
6.
FMSTEREOINDICATOR
_.
17.
OUTPUT
JACKS
(LEFT
AND
RIGHT)
7.
TUNING
KEYS
:
18.
AMFERRITE
BAR
ANTENNA
8.
FM
MODE
SELECTOR
.
19.
AC
ADAPTER
INPUT
FOR
STATION
MEMORY
9.
PRESET
SWITCHES
AND
INDICATORS
20.
BATTERY
COMPARTMENT
FOR
STATION
MEMORY
10.
RANDOM
TUNING
SWITCH
21.
ACCORD
(CEE,
UK,
SAA:
AC
INLET)
11.
TUNING
MODE
SWITCHES
AND
INDICATORS
IV.
PRINCIPAL
PARTS
LOCATION
=
|=.“
°-
AT-S55/L
PRESET SWITCH
PCB
NCTION
SWITCH
P
A3011C5040
i
oASO1IC5050
:
re
POWER
TRANSFORMER
Fig.
2
Back
View
of
Front
Panel
BATTERY
BAR
ANTENNA
COMPARTMENT
AM901
AT-S55T
warp
Bp-15SS
LY.
POWER
SWITCH
Swi
POWER
SUPPLY
PCB
A3011B5030
©
CSA,
AAL
A3011C5060
A30I1B5080
:
CEE,
UK
,SAA
A3011B5090:
U/T
Fig.
3
Top
View
V.
VOLTAGE
CONVERSION
REAR
SIDE
POWER
SUPPLY
PCB
{
if
Woo
POWER
TRANSFORMER
FRONT
SIDE
110V
AREA
°
FI
400mA
250V
220V
AREA
:
F2
200mA
250V
240V
AREA
|
F3
200mA
250V
Fig.
4
Voltage
Conversion
(U/T
Model
Only)
Models
for
Canada,
U.S.A.,
Europe,
UK,
and
Australia
are
not
equipped
with
this
facility.
Each
machine
is
preset
at
the
factory
according
to
desti-
nation
but
some
machines
can
be
set
to
110V,
220V
or
240V
as
required.
If
voltage
change
is
necessary,
this
can
be
accomplished
as
follows.
1)
Disconnect
AC
Power
Cord.
2)
Loosen
holding
screws
and
remove
upper
cover.
3)
Remove
existing
Line
Voltage
Fuse
and
insert
required
Line
Voltage
Fuse
in
thé
proper
fuse
holder.
VI.
ADJUSTMENTS
AT-S55/L
BAR
ANTENNA
CORE
LOW
RANGE
SENS.
TC!
to
TC3
FM_HIGH
RANGE
SENS
Tcl
TC2
TC3
FRONT
END
OKB)
REE
RUNNING
STEREO
SEPARATION
(E_7~NS
©)
raeizzne
:
(®)
VR5(22KB)
RY
(LEFT)
:
T3(BLK)
PILOT
SIGNAL
CANCEL
wate.
aps
WY
LED
SENS.
7Z\\
VR7(22KB)
CD
sit
T2-a
:CENTER VOLTAGE
=
;
T2~b:
DISTORTION
T2-a
T2-b
Fig.
5
Tuner
P.C
Board
A3011A5010
and
Bar
Antenna
(AT-S55)
LW
LOW
RANGE
SENS.
Se
ee
oa
NS
nr
ao
WiMMMMAO
}_M
BAR
ANTENNA
VC2-I
IU
LW
HIGH
RANGE
SENS
FRONT
END
eee
T8
T7
8)
TP3
dase
ose
A)
o
Sa
@
GL
aha
=|
SNe
NE
Fig.
6
Tuner
P.C
Board
A3011A5010
and
Bar
Antenna
(AT-S55L)
AT-S55/L
yee
eee
AM
OSC
FM
OSC
TI(BLK)
CLOCK
FREQ,
Fig.
7
Synthesizer
P.C
Board
A3011B5020
APRROX
600
mm
TEST
LOOP
ANTENNA
Ac
AM
S.S.G
VOLTMETER
OUTPUT
Leh
OR
Rch
OUTPUT
6
Fig.
8
Instrument
Connections
for
AM(MW)
Section
Adjustments
and
Steps
2,
3
of
LW
Section
Adjustments
1.
AM
(AT-S55L:
MW)
SECTION
ADJUSTMENTS
(Refer
to
Figs.
5
to
8)
Unless
otherwise
specified,
use
the
adjustment
points
provided
on
the
Tuner
P.C
Board
(Fig.
5).
Step
Gjustneet
ss
a
Result
Remarks
Item
aR
Se
a
Ti
(BLK)
1
Clock
Synthesizer
420kHz
Connect
a
Frequency
Counter
between
IC3
Pin
Frequency
P.C
Board
(28)
and
GND
on
the
Synthesizer
P.C
Board.
(Fig.
7)
latent
Re
are
)
Connect
a
Frequency
Counter
between
JP1
2
sable
yamenzet
400Hz
(1C3
Pin
(32))
and
GND
on
the
Synthesizer
P.C
requency
P.C
Board
:
Board.
(Fig.
7)
vcl
118.800MHz
BAND
switch
to
FM.
3
PLL
Synthesizer
(Digital
display
Connect
a
Frequency
Counter
between
FM
OSC
Frequency
P.C
Board
indicating
frequency
|
and
GND
on
the
Synthesizer
P.C
Board.
(Fig.
7)
+10.7MHz)
Adjust
the
Digital
Display
to
108.1MHz.
BAND
switch
to
AM
(MW).
4
AM
(MW)
OSC
T6
(RED)
719kHz
Short
TP6
to
GND
on
the
Tuner
P.C
Board.
12
5
AM
IF
Coil
}————}----_—
Low
Range
Sensitivity
¢
600kHz
(603kHz)
High
Range
Sensitivity
1,400kHz
(1,404kHz)
Signal
LED
Sensitivity
is
eae
Maximum
Output
Bar
Antenna
Core
Maximum
Output
ATSS55:
Distortion
Fig.
5
Factor:
AT-SS5L:
Less
than
10%
Fig.
6
:
Maximum
Output
Distortion
Factor:
Less
than
10%
Connect
a
Frequency
Counter
between
AM
OSC
and
GND
on
the
Synthesizer
P.C
Board.
ee
coal
1,000kHz
(1,008kHz),
50dB,
400Hz
(30%)
input.
600kHz
(603kHz),
50dB,
400Hz
(30%)
input.
1,400kHz
(1,404kHz),
50dB,
400Hz
(30%)
input.
1,000kHz
(1,008kHz),
74dB
input.
Adjust
VR7
to
a
point
where
5th
LED
of
SIGNAL
LED
lights
up.
AT-S55/L
2.
LW
SECTION
ADJUSTMENTS
(AT-S55L
Only;
Refer
to
Figs.
6, 8,
9)
AC
VOLTMETER
Leh
OR
Reh
OUTPUT
Fig.
9
Instrument
Connections
for
Steps
4
and
5
of
LW
Section
Adjustments
Unless
otherwise
specified,
use
the
adjustment
points
provided
on
the
Tuner
P.C
Board
(Fig.
6).
Step
Adjustment
Adjustment
Result
Remarks
Item
Point
!
BAND
switch
to
LW.
Short
TP6
to
GND
on
the
Tuner
P.C
Board.
1
Eyes
-
aout
Connect
a
Frequency
Counter
between
AM
OSC
|
and
GND
on
the
synthesizer
P.C
Board.
Low
Range
Bar
Antenna
at
cha
eee
ANTENNA
SELECTOR
to
INT.
2
Sensitivity
Core
ark
ats
Fans
than|
1OOKH2:
50dB,
400Hz
(30%)
input.
(Bar
Antenna)
(Fig.
6)
i
0%
an!
(Refer
to
Fig.
8)
i
-
wiehRange
[|
=.
~~
4
igh
Range
Maximum
Output
.
3
Sensitivity
VC2-1
Distortion
Factor:
SO0EHE,
“008,
400Hz
(30%)
input.
B
(Refer
to
Fig.
8)
(Bar
Antenna)
Less
than
10%
Low
Range
Maximum
Output
|
ANTENNA
SELECTOR
to
EXT.
4
Sensitivity
T4
Distortion
Factor:
|
160kHz,
20dB,
400Hz
(30%)
input.
(EXT.
Antenna)
Less
than
10%
_|
(Fefer
to
Fig.
9)
;
Higa
Range
Maximum
Output
|
soo.
47,
20dB,
400Hz
(30%)
input.
Sensitivity
VC2-2
Distortion
Factor:
(Refer
to
Fig.
9)
(EXT.
Antenna)
Less
than
10%
ee
=
7
3.
FM
SECTION
ADJUSTMENTS
(Refer
to
Figs.
5,
10)
FREQUENCY
COUNTER
RESISTOR
100K
OHMS
TERMINATION
PAD
a
CT
Tse
‘
C
75
OHMS
:
300
OHMS
a
O
-6dB
O
el
©
ANTENNA
TERMINAL
R
ch
REC
OUTPUT
o
FM
STEREO
DISTORTION
GENERATOR
Fig.
10
Instrument
Connections
AT-S55/L
Unless
otherwise
specified,
use
the
adjustment
points
provided
on
the
Tuner
P.C
Board
(Fig.
5).
Remarks
ica
a
Result
em
1
Front-end
T1
(BLK)
Maximum
Noise
IF
Coil
-
(Front-end)
Level
broadcasting:
Centered
)
Center
T2-a
Tuning
Meter
and
TP3.
(See
Note
1)
Voltage
tae
Indication
Notes:
Distortion
3
Factor
a2%
BAND
switch
to
FM,
and
MODE
to
MONO.
Turns
only
noise
without
interference
from
Connect
a
Center
Tuning
Meter
between
TP2
Turns
only
noise
without
interference
from
broadcasting.
Distortion
Factor:
98MHz,
60dB,
1kHz
(mono
100%)
input.
Less
than
0.3%
Less
than
0.3%
in
both
channels.
ee
Connect
a
F
Counter
between
TP4
and
4
Runni
5
onnect
a
Frequency
Counter
between
an
F
oe
yee)
yophe
te
GND
on
the
Tuner
P.C
Board.
(See
Note
2)
requency
5
High
Range
TC1,TC2,TC3
|
Distortion
Factor:
|
MODE
switch
to
MONO.
Sensitivity
(Front-end)
Less
than
3%
108MHz,
Less
than
8dB,
1kHz
(mono)
input.
Confirmati
6
ae
lowiheie:
Distortion
Factor:
|
88MHz,
Less
than
8dB,
1kHz
(mono)
input.
Sensitivity
Less
than
3%
(See
Note
3,
4)
7
Pilot
Signal
T3
(BLK)
Mini
Baik
MODE
switch
to
STEREO.
Cancel
VR3
(100KB)
inimum
UUtput
|
98MHz,
60dB
(stereo),
Pilot
signal
only
input.
Stereo
‘
8
|
Separation
VRS
(22KB)
|
More
than
40dB
ne
Mites
oo.
ele
eal
ted
(Left
->
Right)
P
Stereo
Rais
9
Separation
VR6
(22KB)
More
than
40dB
98MHz,
60dB,
1kHz
(stereo
100%)
Rch
input.
(Right
>
Left)
Minimum
output
of
Lch.
Confirmati
98MHz,
60dB,
1kHz
(stereo
100%)
input.
10
|
of
ce
oe
Distortion
Factor
:
|
If
distortion
exceeds
0.5%,
first
check
accord-
Eee
Less
than
0.5%
|
ing
to
Steps
2,3,
4,
8
and
9,
and
then
readjust
tion
Factor
;
according
to
Step
1.
.
98MHz,
40dB
input.
11
nae
ae
VR2
(4.7K)
Adjust
VR2
to
a
point
where
Sth
LED
of
SIGNAL
SaSTvaty
LED
lights
up.
(See
Note
5)
MODE
switch
to
STEREO.
98MHz,
22dB,
1kHz
(mono
100%)
input.
Adjust
Muting
Level
VRi
(100K)
22dB
+
6dB
VR1
until
the
output
signal
is
reduced
to
zero.
Vary
the
SSG
output
by
+6dB
and
check
muting
operation.
1.
For
the
Center
Meter
should
be
used
the
tuning
meter
and
the
like
available
as
a
part
of
the
other
models.
2.
When
connecting
a
Frequency
Counter,
connect
from
TP
via
100
kohms
resistor.
(Refer
to
Fig.
10)
3.
When
the
specified
sensitivity
of
8dB
cannot
be
obtained
at
the
two
frequency
points,
88MHz
and
108MHz,
repeat
the
adjustment
as
described
in
Step
5.
4,
When
the
distortion
factor
of
sensitivity
still
does
not
comply
with
the
data
specifications,
adjust
by
tuming
the
Front-end
IF
Coil
core,
but
not
more
than
1/2
turn.
5.
The
5th
LED
lights
up
at
40dB
but
when
the
attenuator
is
decreased
2dB
it
is
extinguished.
15
Vil.
CLASSIFICATION
OF
VARIOUS
P.C
BOARDS
1.
P.C
BOARD
TITLES
AND
IDENTIFICATION
NUMBERS
1)
Model
AT-S55
P.C
Board
Title
P.C
Board
Number
Tuner
P.C
Board
A3011A5010
Mute
Switch
P.C
Board
A3011A5011
:
Synthesizer
P.C
Board
A3011B5020
Preset
Switch
P.C
Board
A3011C5040
Function
Switch
P.C
Board
A3011C5050
LED
P.C
Board
A3011C5060
Power
Supply
P.C
Board
F
(CSA,
AAL)
A3011B5030
Power
Supply
P.C
Board
(CEE,
UK,
SAA)
A3011B5080
Power
Supply
P.C
Board
A3011B5090
(U/T)
Battery
P.C
Board
A3011D5070
2)
Model
AT-S55L
P.C
Board
Title
P.C
Board
Number
Tuner
P.C
Board
A3011A5010
Mute
Switch
P.C
Board
A3011A5011
Synthesizer
P.C
Board
A3011B5020
Preset
Switch
P.C
Board
A3011C5040
Function
Switch
P.C
Board
A3011C5050
LED
P.C
Board
A3011C5060
A3011B5080
A3011D5070
Power
Supply
P.C
Board
Battery
P.C
Board
16
A
T-S55
2.
MODEL
AT-S55;
COMPOSITION
OF
VARIOUS
P.C
BOARDS
.
1)
Tuner
P.C
Board
A3011A
5010
(4ED),
Mute
Switch
P.C
Board
A3011A3011
and
LED
P.C
Board
A3011C5060
BAR
ANTENNA
AN9OI
Sesh
SSeS
ee
eee
|
@
am
Low
Rance
sens.
a
t
I
{
|
ALLEL
UL
LTY
ET
Ts)
ec
|
!
1
| |
tote
ete
oS
iti
netet
he
x“
a
=
>
,
{
8
2
z
@
2
SYNTHESIZER
PCB
3
LOCATION
OF
ICaTR
TRI—ce
IC
i—p4
TR2-——C3.
IC
2
D2
TR3—-C3.
IC
3
EI.
TR4A—
C3
IC
4—
BB
TR5—-C2.
IC
5
E4
TRE—E4
TR7—E4
TR8—D4
TRO—D4
4
TRIO—D3
TRII—-E2
TRI2—-E2
TRIS—E2
TRI4—E
I
TRIGB—Cca
TRIS—E4
TR2O—ES
TR21—E2
A
[am]
[Loc
}-—[oist
]
VOLTAGE
MEASURED
AT
FM
TUNE.
VOLTAGE
OF
IC4
AND
TRIB
INDICATES
AM
TUNE.
WARNING:
AINDICATES
SAFETY
CRITICAL
COMPONENTS,
FOR
CONTINUED
SAFETY,
REPLACE
SAFETY
CRITICAL
COMPONENTS
ONLY
WITH
MANUFACTURER'S
RECOMMENDED
PARTS
Z
AVERTISSEMENT:
AIL
INDIQU
LES
COMPOSANTS
CRITIQUES
DE
SURETE.
POUR
MAINTENIR
LE
DEGRE
DE
SECURITE
DE
L'APPAREIL
NE
REMPLACER
LES
CONPOSANTS
DONT
LE
FONCTIONNEMENT
EST
CRITIQUE
POUR
LA
SECURITE
QUE
PAR
DES
PIECES
RECOMMANDEES
PAR
LE
FABRICANT
B
C
[ew
™
(Loe
}~—[pist]
|
u
MUTE
SWITCH
PCB
AZOIIASOL
WHT/
LONG
BLU
TUNER
PCB
AZONASOIO
LEO
PCB
A301IC5060
[STEREO]
REO
FS
TERE
FE
ee
.
a
ete
D2
SLP-251D.
@
ECB
2SC536K
-NP
2S¢930
REO
(9)
sterile
7654325
hag
Lit
r
TE
{
fT
|
(
Hy
1
i
xl
al
4
|
|
!
!
1
i
:
—+-
t
mM
ow
D3)
SLP-1520
SGD
2SK30A
L__wat
__.@)
(5)
SYNTHESIZER
PCB
Jrower
SUPPLY
PCB
17
et
2)
Synthesizer
P.C
Board
A3011B5020
(2ED),
Preset
Switch
P.C
Board
A3011C5040,
Function
Switch
P.C
Board
A3011C5050
and
Battery
P.C
Board
A3011D5070
TUNER
PCB
+
x
hi
iN
BATTERY
SUPPLY
a
re)
>
é
&
i
3}
zr}
S|
=
ECB
$6
OD
B)
oe;
3s
=
=
2SCS36K-NP
2SA608K-
NP
2Ski9
2SK30A
BATTERY
PCB
A3011D5070
LOCATION
OF
IC
8
TR
VLT
TRI~ATI
TR2—AlI
Yow
TR3—BI
TRAO—ATL
@)
TRS—AI
1
VLT
TRE—BI
TR7—AI
ORG
TR6—A}
—>(6)
TRO—C2
frre:
O
POWER
SUPPLY
PCB
TRIO—
C2
2sxisty))
TRI—
C2
TRI3—E!
TRI@—E
I
TRI5—D2
TRIG—E2
TRI?
—E2@
TRI8S—~E2
TRIS—E2
TR2O—B2
TR2I-——~B2
‘
1.
-
TRIG
TOID
AC
ADAPTER
Ict
al
igs
esa6oeK—np
INPUT
=
py
(FG)
1c2—B1
"
163—Cl
.
O-~*«)—-®
164
—B2
2
:
'CS5—D2
1cC6—C2
1C7——C2
VOLTAGE
MEASURED
AT
FM
MODE
FREQUENCT:
98.0
MHz
GRY
|
Come
art
|
site
}
als
Px,
Bi
st
he
SYNTHESIZER
PCB
A3011B
5020
tc
AM
j
FM
J
AA
Ll
MHz
IND!
=
SL-1724-02W
j-FUNCTION
SWITCH
PCB
A3O0IIC5050
PRESET
SWITCH
PCB
A3ZOIIC5040
®
Gsc-2an
WARNING:
AINDICATES
SAFETY
CRITICAL
COMPONENTS.
FOR
CONTINUED
SAFETY,
nea
nae
REPLACE
SAFETY
CRITICAL
COMPONENTS
ONLY
WITH
MANUFACTURER'S
RECOMMENDED
PARTS
AVERTISSEMENT:
AIL
INDIQU
LES
COMPOSANTS
CRITIQUES
DE
SURETE.
een
ies
¢
BANTER
ve
DEGRE_
DE
SECURITE
DE
L'
APPAREIL
NE
REMPLACI!
CONP'
‘S
DONT
LE
FONCTIONNEMENT
EST
CRITIQUE
POUR
LA
SECURITE
QUE
PAR
NOES
PIECES
RECOMMANDEES
PAR
LE
FABRICANT
AT-S55
3)
Power
Supply
P.C
Board
A3011B5090
(U/T)
Re
P.
.
eck
BC
2SC536K-NP
2SD612K
2SD3I3HP
ACIIOV
10240
50/60Hz
LOCATION
OF
iC
&
TR
TRI
~
C4
TR2
-—
C4
TR3
—
C3
TR4
-
C4
TRS
-
BS
TRE
-
84
TR?
-—
AG
TRS
-
B4
A\
F
3,
240V
AREA
200mA
250V
F2.
220V
ARE;
|
|
|
|
|
Att
AT
-
S55T-70
TR
1,3,5,8--2SC536K-NP(FG)
TR2,4,7----2$D612K
(0,
E,F)
TRE
---~--
25D313HP(D,E,F)
|
|
ane
fake
f
“"
AA
Ak
AZOIBEO3G
AZSONBSO80
ARONBSOSO
BS
a!
7
|
|
|
|
|
|.
|
|
|
|
|
|
|
|
|
|
L
RED
TUNER
PCB
[
©
On
AZ011A5010
WHT
(2)
YUW
(4)
@)
ORG
6)
SYNTHESIZER
PCB
BRN
A3011
85020
6)
BLK
(8)
WARNING:
AINDICATES
SAFETY
CRITICAL
COMPONENTS.
FOR
CONTINUED
SAFETY,
|
REPLACE
SAFETY
CRITICAL
COMPONENTS
ONLY WITH
MANUFACTURER'S
RECOMMENDED
PARTS
%:
;
AVERTISSEMENT:
AIL
INDIQU
LES
COMPOSANTS
CRITIQUES
DE
SURETE.
POUR
MAINTENIR
LE
DEGRE
DE
SECURITE
DE
L
‘APPAREIL
NE
REMPLACER
LES
CONPOSANTS
DONT
LE
FONCTIONNEMENT
EST
CRITIQUE
POUR
LA
SECURITE
QUE
PAR
DES
PIECES
RECOMMANDEES
PAR
LE
FABRICANT
ee
OE
RE
SY
RE
PS
7
EERE
7
SSS
ESS
SESS
PH
19
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