Akai AC-M2 User manual
STEREO
DECK
RECEIV
ER
é
a
BAND.
FMMUTE
MODE
SPEAKER
PHONES
|
TAGE
METAL
fi
eM
aM
REM
AUTO
ON:
.
=
MONO
.-
OFF
move.
AC-M2
—
_
:
ee
STEREO
DECK
RECEIVER
wove
AC-M2
SECTION
1
SERVICE
MANUAL
2
3
SECTION
2
PARTS
DEST
ins
heath
aie
oor
aren
eae,
AG)
SECTION
3
SCHEMATIC
DIAGRAM
................
30
2
_
SAFETY
INSTRUCTIONS
SAFETY
CHECK
AFTER
SERVICING
Confirm
the
specified
insulation
resistance
between
power
cord
plug
prongs
and
externally
exposed
parts
of
the
set
is
greater
than
10
Mohms,
but
for
equipment
with
external
antenna
terminals
(tuner,
receiver,
etc.)
and
is
intended
for
or
[A],
specified
insulation
resistance
should
be
more
than
2.2
Mohms
(ground
terminals,
microphone
jacks,
headphone
jacks.
line-in-out
jacks
etc.)
PRECAUTIONS
DURING
SERVICING
1.
Se
eND
Parts
identified
by
the
A\
symbol
parts
are critical
for
safety.
Replace
only
with
parts
number
specified.
In
addition
to
safety,
other
parts
and
assemblies
are
specified
for
conformance
with
such
regulations
as
those
applying
to
spurious
radiation.
These
must
also
be
replaced
only
with
specified
replacements.
Examples:
RF
converters,
tuner
units,
antenna
selector
switches,
RF
cables,
noise
blocking
capacitors,
noise
blocking
filters,
etc.
Use
specified
internal
wiring.
Note
especially:
1)
Wires
covered
with
PVC
tubing
2)
Double
insulated
wires
3)
High
voltage
leads
Use
specified
insulating
materials
for
hazardous
live
parts.
Note
especially:
1)
Insulation
Tape
2)
PVC
tubing
3)
Spacers
(Insulating
Barriers)
4)
Insulation
sheets
for
transistors
5)
Plastic
screws
for
fixing
microswitch
(especially
in
turntable)
When
replacing
AC
primary
side
components
(transformers,
power
cords,
noise
blocking
capacitors,
etc.),
wrap
ends
of
wires
securely
about
the
terminals
before
soldering.
c>
c>
Observe
that
wires
do
not
contact
heat
producing
parts
(heatsinks,
oxide
metal
film
resistors,
fusible
resistors,
etc.).
.
Check
that
replaced
wires
do
not
contact
sharp
edged
or
pointed
parts.
Also
check
areas
surrounding
repaired
locations.
Use
care
that
foreign
objects
(screws,
solder
droplets,
etc.)
do
not
remain
inside
the
set.
Voltage
Conversion
and
Best
Selector
1)
Voltage
Conversion
Models
for
Japan,
Canada,
USA,
Europe,
UK
and
Australia
are
not
equipped
with
this
facility.
Each
machine
is
preset
at
the
factory
according
to
destination,
but
some
machines
can
be
set
to
110V—120V
or
220—240V
as
required.
If
your
machine’s
voltage
can
be
converted:
1-1)
Disconnect
the
power
cord.
1-2)
Remove
the
cover
plate.
1-3)
Move
the
Voltage
Selector
located
on
the
rear
panel
with
a
screwdriver.
So
that
the
marker
is
below
the
voltage
for
your
area.
(Refer
to
Fig.
1)
2)
Cycle
Conversion
With
DC
motor
cycle
conversion
is
not
necessary.
VOLTAGE
SELECTOR
220-240V
H10-120V
Fig.
1
i
ee
ee
VI.
VIL.
SECTION
1
SERVICE
MANUAL
TABLE
OF
CONTENTS
SPECIFICATIONS
.
2... 2...
cece
eee
teeter
tence
te
eneene
4
DISMANTRING
OF
UNIT
..
0...
ee
eee
5
CONTROES
tare.
Scheele
ide
Ne
alee
aes
&
Dae
telette
BaF
Wye
A
ene
eae
ele
6
PRINCIPAL
PARTS
LOCATION
............0000
cece
ee
eeeenees
7
MECHANICAL
ADJUSTMENT
.........
0.00.
e
eee
eee
eee
8
5-1.
PINCH
ROLLER
PRESSURE
MEASUREMENT
................
8
5-2.
WINDING
TORQUE
MEASUREMENT
IN
EACH
MODE
..........
8
5-3.
TAPE
SPEED
ADJUSTMENT
.......
0...
0.00.0
8
5-4.
DIAL
CORD
STRINGING...
0...
2
ee
eee
9
ELECTRICAL
ADJUSTMENT
.....
0.0.0...
.
eee
ee
eee
10
6-1.
AM(MW)
ADJUSTMENT
...........
0...
eee
ee
11
6-2.
FM
SECTION
ADJUSTMENT
...........
00.00.02
eee
eee
11
6-3.
CASSETTE
DECK
SECTION
ADJUSTMENT
..................
13
CLASSIFICATION
OF
VARIOUS
P.C
BOARDS
................05-
14
7-1.
P.C
BOARD
TITLES
AND
IDENTIFICATION
NUMBERS.........
14
7-2.
COMPOSITION
OF
VARIOUS
P.C
BOARDS
...............-5.
15
For
basic
adjustments,
measuring
methods,
and
operating
principles,
refer
to
GENERAL
TECHNICAL
MANUAL.
SERVICE
MANUAL
AC-M2
I.
SPECIFICATIONS
FM
TUNER
SECTION
TUNING
FREQUENCY
RANGE
87.6
to
108
MHz
USABLE
SENSITIVITY
(HF)
17.2
dBf
QUIETING
SENSITIVITY
(S/N=504dB)
Mono/ST
23.2
dBf/43.2
dBf
SELECTIVITY
(400
kHz)
60
dB
IMAGE
REJECTION
55
dB
IF
REJECTION
90
dB
SPURIOUS
REJECTION
60
dB
AM
SUPPRESSION
55
dB
S/N
(Mono/ST)
70
dB/60
dB
T.H.D.
(Mono/ST)
STEREO
SEPARATION
(1
kHz)
AM
TUNER
SECTION
0.3%/0.4%
42
dB
TUNING
FREQUENCY
RANGE
525
to
1,605
kHz
USABLE
SENSITIVITY
(IHF)
500
wV/m
SELECTIVITY
38
dB
IMAGE
REJECTION
40
dB
IF
REJECTION
50
dB
S/N
40
dB
T.H.D.
DECK
SECTION
TRACK
SYSTEM
TAPE
SPEED
MOTOR
HEADS
WOW
&
FLUTTER
TAPE
WINDING
TIME
FREQUENCY
RESPONSE
S/N
T.H.D.
POWER
AMPLIFIER
SECTION
1.5%
4
Track
2-Channel
Stereo
System
4.76
cm/s
(1-7/8
ips)
Electronically
Controlled
DC
Motor
x
1
High
Density
Metallic
Rec/Play
Head
x
1
Erase
Head
x
1
0.07%
(WRMS)
90
sec
Using
a
C-60
Tape
NORMAL
|
40
Hz
to
13,000
Hz
(+3
dB)
CrO,
|
40
Hz
to
14,000
Hz
(+3
dB)
METAL
|
40
Hz
to
15,000
Hz
(+3
dB)
54
dB
Dolby
NR
ON:
Improves
up
to
10
dB
above
5
kHz
1%
(Metal
tape)
RATED
POWER
OUTPUT
(2
channels
Driven)
S/N
RESIDUAL
NOISE
(8
ohms)
2
x
18W/0.5%
(1
kHz,
8
ohms)
PHONO
AUX
68
dB
90
dB
0.5
mV
CHANNEL
SEPARATION
(IHF,
1
kHz)
45
dB
APPLICABLE
SPEAKER
IMPEDANCE
4
to
16
ohms
PRE-AMPLIFIER
SECTION
IMPUT
SENSITIVITY/IMPEDANCE
PHONO
|
3
mV/47
kohms
AUX
|
300
mV/47
kohms
MIC
|
1.6
mV/4
kohms
FREQUENCY
RESPONSE
PHONO
(RIAA
Deviation)
|
30
Hz
to
15
kHz
+0.5
dB
AUX
|
15
Hz
to
50
kHz
+0,
—3
dB
TONE
BOOST
BASS
|
+8
dB
(100
Hz)
TREBLE
|
+8
dB
(10
kHz)
POWER
REQUIREMENT
120V,
60
Hz
for
USA
&
Canada
POWER
CONSUMPTION
220V,
50
Hz
for
Europe
except
UK
240V,
50
Hz
for
UK
&
Australia
110—120V/220—240V,
50
Hz/60
Hz
switchable
for
other
countries.
150W
DIMENSIONS
|
350(W)
x
127(H)
x
365(D)
mm
(13.8
x
5
x
14.4
inches)
WEIGHT
6.3
kg
(13.9
lbs)
*
For
improvement
purposes,
specifications
and
design
are
subject
to
change
without
notice.
*
Dolby
and
the
Double
D
symbol
are
trade
marks
of
Dolby
Laboratories.
(Manufactured
under
license
from
Dolby
Laboratories.)
SERVICE
MANUAL
AC-M2
i.
DISMANTLING
OF
UNIT
In
case
of
trouble,
etc.
necessitating
dismantling,
please
dismantle
in
the
order
shown
in
the
photographs.
Reassemble
in
reverse
order.
BOTTOM
COVER
SCREWS
SCREWS
SCREWS
UPPER
COVER
SCREWS
SERVICE
MANUAL
AC-M2
lil.
CONTROLS
OnNaanrewn
a
@)
@)
YA
OOM
OAH
AC
OUTLET
UNSWITCHED:
220-2404-—
190-120.
AC
110~120¥/220-~
2409
50/GOHz
150W
WARHING
<
SHOCK
HAZARO-D0
NO”
PEN!
AVIS:
RISQUE
DE
CHOC
ELECTRIO®
WE
PAS
OUYRIR!
NICHT
GFFRENS-
ay
Fig.
3-2
Rear
Side
EJECT
BUTTON
17.
FM
MUTE
SWITCH
POWER
SWITCH
18.
FM
MODE
SELECTOR
CASSETTE
HOLDER
19.
SPEAKER
SWITCH
TONE
(BASS)
CONTROL
20.
PHONES
JACK
TAPE
COUNTER
and
RESET
BUTTON
21.
TUNING
CONTROL
TONE
(TREBLE)
CONTROL
22.
AM
LOOP
ANTENNA
TERMINAL
BALANCE
CONTROL
23.
FM
ANTENNA
TERMINAL
VOLUME
CONTROL
24.
PHONO
JACKS
TUNING
DIAL
SCALE
and
INDICATOR
25.
AUX
JACKS
©
LOUDNESS
SWITCH
26.
SPEAKER
TERMINALS
OPERATION
BUTTONS
,
27.
AC
CORD
Mic
JACK
28..
AC
OUTLET
.
TAPE
SELECTORS
(Normal,
CrO,,
METAL)
29.
VOLTAGE
SELECTOR
(
|U}
Model
only)
DOLBY-NR
SWITCH
30.
BEAT
SELECTOR
INPUT
SOURCE
SELECTORS
(TAPE,
PHONO,
AUX)
31.
LOOP
ANTENNA
BAND
SELECTORS
SERVICE
MANUAL
AC-M2
IV.
PRINCIPAL
PARTS
LOCATION
TREBLE
CONTROL
VOLUME
BASS
CONTROL
VOLUME
BALANCE
CONTROL
VOLUME
COUNTER
VOLUME
CONTROL
VOLUME
POWER
SWITCH
LED
PCB
LOUDNESS
SWITCH
PLAY
SWITCH
FF
RWD
SWITCH
22193679(OTHERS)
TUNING
SHAFT
22193716
VOLUME
PCB
22193676
(OT
HERS)
22193713
an
JACK
PEAKER
(ON/OFF)
SWITCH
ERASE
HEAD
MIC
JACK:
FM
MODE
(AUTO/MONO)SWITCH
TAPE
SELECTOR
SWITCH
FM
MUTE
SWITCH
{NORMAL
,
CrO2,METAL
)
BAND
SELECTOR
SWITCH
(FM/AM)
DOLBY
NR
SWITCH
INPUT
SOURCE
SELECTOR
SWITCH
(TAPE,PHONO,AUX
)
EJECT
BUTTON
REC/PB
HEAD
Fig.
4-1
Front
View
BEAT
PCB
SPEAKER
PCB
OTHERS)
selaci4
ae
22193714
AC
OUTLETS
=
22193715
PHONO
PCB
22193680
(OTHERS)
22193717
[Al
POWER
TRANSFORMER
SWITCH
PCB
22193674
22i937I1
[Aj[C]
22193697
[Ss]
MAIN
PCB
POWER
SWITCH
22193675
(OTHERS)
22193712
[A)[C]
DC
MOTOR
PAUSE
SWITCH
Fig.4-2.
Top
View
SERVICE
MANUAL
AC-M2
V.
MECHANICAL
ADJUSTMENT
5-1.
PINCH
ROLLER
PRESSURE
MEASUREMENT
(Refer
to
Fig.
5-1)
PINCH
ROLLER
Put
in
PLAY
mode,
push
pinch
roller
arm
down
with
the
spring
gauge,
push
the
pinch
roller
1~2
mm
from
the
capstan
and
release
slowly.
Read
the
spring
gauge
at
the
moment
the
pinch
roller
touches
the
capstan
5-2.
WINDING
TORQUE
MEASUREMENT
IN
EACH
MODE
(Refer
to
Fig.
5-2)
CASSETTE
TORQUE
METER
OQH)\VO
ZN
Fig.5-2
Cassette
Torque
Meter
Insert
cassette
torque
meter
(AJ-751179)
and
mea-
sure
in
each
mode.
For
fast
forward
and
rewind
measure
at
the
end
of
the
tape
has
stopped
running.
Forward
play:
35
to
70
g-cm
Fast
Forward,
Rewind:
70
to
160
g-cm
SPRING
GAUGE
}
300
to
500gtm
[4
TS
PINCH
ROLLER
SPRING
Fig.
5-1
and
begins
to
rotate.
Specified,
contact
pressure
measurement
of
300
to
500
grm.
If
there
is
no
measurement
obtained,
replace
the
pinch
roller
spring.
5-3.
TAPE
SPEED
ADJUSTMENT
(Refer
to
Fig.
5-3)
TAPE
SPEED
ADJUSTMENT
VOLUME.
Fig.
5-3.
Connect
a
frequency
counter
to
line
output
terminal.
Playback
a
1,000
Hz
pre-recorded
test
tape
(AT-
750774)
or
a
3150Hz,
Pre-recorded
test
tape
(AT-751263),
and
adjust
the
tape
speed
adjustment
volume
to
obtain
a
tape
speed
of
1000
+
1.0%,
or
3150
+
1.0%.
SERVICE
MANUAL
AC-M2
fe
.
5-4.
DIAL
CORD
STRINGING
CEMENT
AFTER
ONE
TIE
APPROX
425mm
=
ve
eveuer
.
—
CRUSH
TO
FLAT
SPRING
Fig,
5-4
1)
Set
the
tuning
capacitor
to
the
maximum
capaci-
tance
(fully
counterclockwise
position).
2)
Wind
the
dial
cord
in
the
numerical
sequence
as
shown
in
Fig.
5-4.
service
MANUAL
AC-M2
————_————____
9
Vi.
ELECTRICAL
ADJUSTMENT
svr202
TPS
STEREO
SEPARATION
PX
FREE
RUNNING
-
-
FREQUENCY
1T203
°
Tele
(2)
lal
L603
(GND)
DISTORTION
\T202
FREQUENCY
[e]
TPI7
AMIE
SVR6O2
{R)
Bi)
svrsoitw
SVR303(R)
FREQUENCY
REC
LEVEL
GS)
RESPONSE
IT201
a
3
Lc3ol
FM
IF
LE
2@o3
(os
eM
LOCAL
|)
Ee
Bs
{Boe
tise)
nm
=
Sms
LIO5
LIO3
ERE
LI04
n
SVR304(R)
REC
LEVEL
SVR30I(L)
TP3[=]
PB
LEVEL
LIo9
(LOW)
[2]
LI08
[2]
(Low)
SENSITIVITY
AM
LOCAL
OSC
(High)
{Qs
{2
Tclo2
(HIGH)
TIO
SVR302
(R)
PB
LEVEL
MAIN
AMP
PCB
22193675
Fig.
6-1
Adjustment
Points
and
Test
Points
of
Main
P.C
Board
TPI6(R)
TPIS(L)
TPI4
(GND)
VOLUME
PCB
Fig.
6-2
Test
Points
of
Volume
P.C
Board
SERVICE
MANUAL
AC-M2
10
6-1.
AM
(MW)
ADJUSTMENT
1)
Connect
test
equipment
as
shown
in
Fig.
6-3.
2)
Function
Switch
to
AM.
3)
Generator
modulation
is
400
Hz,
30%.
4)
Proceed
as
outline
in
the
Chart.
APPROX
600mm
TEST
LOOP
ANTENNA
AM
_S.S.G
AC
SEI
VOLTMETER
O
OUTPUT
©
:
Leh
OR
Reh
O
Step
Adjusmuent
Input
Signal
adieinent
Result
Tf
Remarks
Item
Point
ne
—
—|
Maximum
e
Turn
the
Tuning
Dial
1
AM
IF
459
kHz
50
dB
IT202
output
{=
counterclockwise.
|
>
AM
Local
OSC
510
kHz
50
dB
L109
Maximum
e
Turn
the
Tuning
Dial
(Low)
output
fully
counterclockwise.
3
AM
Local
OSC
1650
kHz
50
dB
TC103
Maximum
e
Turn
the
Tuning
Dial
(High)
output
fully
clockwise.
4
Repeat
Step
2
and
3
as
Required.
5
|
LowRange
|
¢ookHz
50dB
|
L108
Maximum
|
,
Tune
to
signal.
Sensitivity
output
|
6
|
HighRange
|
i4o0kHz
50dB
|
C102
Maximum
|.
Tune
to
signal.
Sensitivity
output
7
Repeat
Step
5
and
6
as
required.
|
6-2.
FM
SECTION
ADJUSTMENT
1)
Connect
test
equipment
as
shown
in
Fig.
6-4.
FREQUENCY
2)
Push
the
FM
Button.
3)
Generator
modulation
is
1
kHz,
75
kHz
diviation.
4)
Proceed
as
outline
in
the
Chart.
AC
VOLTMETER
Lert
cH
©
SPEAKER
TERMINAL
EXT,MOD
O
OUTPUT
K
O
INPUT
O
RIGHT
CH
SPEAKER
TERMINAL
AC
VOLTMETER
FM
STEREO
GENERATOR
Fig.
6-4
SERVICE
MANUAL
AC-M2
11
FM
IF
Coil
Distortion
Factor
FM
Local
OSC
FM
Local
OSC
Low
Range
Sensitivity
(See
Note
1)
High
Range
Sensitivity
Free
Running
Frequency
Stereo
Separation
(Left
>
Right)
Stereo
Separation
(Right
>
Left)
12
87.4
MHz
20dB
109
MHz
20
dB
90
MHz
10
dB
106
MHz
10dB
98
MHz
60
dB
98
MHz
60
dB
IT201
98
MHz
60
dB
IT203
distortion
SERVICE
MANUAL
AC-M2
Maximum
Noise
Level
Repeat
Step
1
and
2
as
required.
Maximum
IOS
output
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
Tunes
only
Noise
without
interference
from
broadcasting.
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
Turn
the
Tuning
Dial
fully
counter-clockwise.
Maximum
output
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
Turn
the
Tuning
Dial
fully
clockwise.
=i
e
Maximum
output
level
e
THD:
within
3%
distortion
e
Maximum
output
e
THD:
within
3%
distortion
Repeat
Step
5
and
6
as
required.
SVR201
19
kHz
+
50
Hz
Minimum
SVR202
output
Minimum
output
Confirmation
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
Tune
to
signal.
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
OFF
e
Tune
to
signal.
e
MODE
switch
to
MONO
e
FM
MUTE
switch
to
ON
e
Connect
a
Frequency
Counter
between
TP-5
and
GND.
e
MODE
switch
to
STEREO
e
FM
MUTE
switch
to
ON
e
10%
Pilot
(7.5
kHz
diviation)
e
90%
Main
&
sub
(67.5
kHz
diviation)
eInput
only
Left
ch.
e
Minimum
output
of
Right
ch.
e
Condition
is
same
as
Step
10.
e
Input
only
Right
ch.
e
Minimum
output
of
Left
ch.
6-3.
CASSETTE
DECK
SECTION
ADJUSTMENT
(Refer
to
Fig.
6-1
and
Fig.
6-2)
|.
Frequency
Response
Normal
Blank
tape
1,000
Hz,
10,000
Hz
30
mV
Recording
SVR601
(Left)
SVR602
(Right)
REC/P.B
NOTE:
1.
Use
the
Maxell
UD
C-60
for
Adjustment
step
3
and
4.
2.
As
the
test
tape
has
been
changed,
set
to
180
mV
when
using
333
Hz
test
tape.
For
details,
refer
to
Service
Guide
(No.
0012)
issued
in
Nov.,
1982.
SERVICE
MANUAL
AC-M2
1,000
Hz
to
10,000
Hz
flat
Adjustment
Test
Tape
or
Adjustment
Result
Rewcke
Item
Supply
Signal
Point
Playback
333
Hz
SVR301
180
mV
e
Connect
a
AC
Voltmeter
1
es
i
or
(Left)
between
TP-15
(Left),
(Se
ces
2)
315
Hz
SVR302
190
mV
TP-16
(Right)
and
TP-14
vies
Test
Tape
(Right)
(GND).
e
Set
Beat
Switch
to
Bias
Position
2.
2
Esscteac
L603
85
kHz
e
Connect
a
Frequency
meq
y
Counter
between
TP-17
and
TP-18
(GND).
=|
|
e
TR611
(28C2236)
Base
to
GND.
Wainer
Blank
SVR303
e
Tape
Selector
Switch
to
3
Recording
ne
(Left)
0.4mvV Normal
position.
Level
1.000
ns
300mV
SVR304
:
e
Connect
a
AC
Voltmeter
:
(Right)
between
TP-11
(Left),
TP-12
(Right)
and
TP-13
(GND).
e
Set
Tape
Selector
Switch
to
Normal
position.
e
Connect
a
AC
Voltmeter
between
TP-15
(Left),
TP-16
(Right)
and
TP-14
(GND).
13
Vil.
CLASSIFICATION
OF
VARIOUS
P.C
BOARDS
|
7-1.
P.-C
BOARD
TITLES
AND
IDENTIFICATION
NUMBERS
L
P.C
Board
Title
P.C
Board
Number
Remarks
22193675
ful,
MAIN
P.C
Board
22193712
(al.
|
22193676
ULIS
VOLUME
P-C
Board
22193713
fal,
22193677
UI,|S
ia
SPEAKER
PC
Board
|
22193714
(Al,
.
22193678
Ul,|S
BEAT
PC
Board
22193715
[a],
22193679
ul,
[Ss
LED
P.C
Board
22193716
[a],
(C]
—_
22193680
PHONO
P.C
Board
[u],
22193717
[A],
[Cc]
|
22193674
SWITCH
P.C
Board
22193711
[A],
[Cc]
22193697
S
a
SERVICE
MANUAL
AC-M2
7-2.
COMPOSITION
OF
VARIOUS
P.C
BOARDS
1)
MAIN
AMP
P.C
BOARD
22193675
(U,
S),
22193712
(A,
C)
LOCATION
OF
COMPONENTS
:
—
:
a
7 ; " ’
a
a
me
. . '
TR202
to
204,
205,
206,
A
: : f
i:
:
sie
Se
'
Bll,
312,
616,
617
--—----——
2SC1815
(GR)
TR
nese)
&
we)
:
1
é
ssanbistinsscuntame
ssa
: ;
TR201,
207
--~---—---—-—-~---~—
2SC380TM
(0)
TROO|
--———-—
D2
|
ie
;
wwe
|e
2 .
ate
©
] : :
a
(I
:
TR
208,
301,
302,
TRIOI,102
~——-
A3
lo
ove
eae
6?)
: :
g
: /
303
to
306,
602,
603
---—-~——
2SC1815
(BL)
TRIO3
—--———
B3
: ;
ee
. :
Fg
:
TR
102
------~—--—-—-----——
28C€1923(R)
TRIO4
—-——--
B4
: : ‘
3
: , ‘ . j :
TR
103
—-———--——--———-—-—~--
28€1923
(0)
TR201
—-—-—~-
a2
: : ’ : a
YT
of
TRIO!
——--—~-~————---———-—
38K73(Y)
TR202
to
204
—-—
B2
: ‘
ks
Pisce
eres
: ‘ i : :
Pow:
'
TR
104
——~~——--—-————————
2SK192A
(Y)
TR205
,
206
-——
BI
|
aoe
: ;
oe
:
—
3
TREO!
——-——-———--—-——-—-—~—--
28062236
(Y)
TR207
———-——
A2
: 1
2
: ; : : ; : ' _
oe
TROOI,
611,
619
--—-———-————
28C2236
(0)
TR208
--———-
82
| ; :
coe
elt
:
TM
: ;
TR604,
615,
618
————-——-——————
2SAI015
(GR)
TR301,
302———
C3
: i d .
ae
q '
ok
CS
.
TR307,
308,
309,
310,
620
-~-——-
2801302
(S)
TR303
———--——
04
; ; :
R226
\ ; :
|
rz
ae
a
TR313,
314
—-—-—-—————————-—
28/103
(GR)
TR304
—--———
£4
: . ’ 3 :
ele
‘ y :
TREI4
—--—-~——-——-~—-—-—~—---—
28A950(Y)
TR305
—-—-——
D3
:
TR306
—-——-—
£3
TR307
---———-
C3
:
TR308
—---———
04
.)
TR309
——-———
D2
’
TR31O
--————
£3
/
TR3I1
—--———
D2
i
TR3I2
—-————
E3
i
TR3IZ
—--——-—
C3
TR3I4
—--———
D3
TR3I5
—--—-—
D5
TREO|
-—--—-
El
TR6O2,
603-——
C4
TR6E04———--——
BI
TRG6I1,
614
———
F2
TRGEI5
to
6IB——
E2
TREI9Q
—-————
F2
TR620-—-—---
Cl
tc
I¢201
----——
A2
1c202
--~--——
Al
Ic302
---~——-
D4
1¢303
-———--
F4
1c305
—--——-—
03
1c306
—---—-
£4
Ic501
--——--
C2
1c502-~---——
Cl
TERMINAL
TP-1,2---—
A3
TP-3
—--———
84
TP-4,5-----
Al
TP-Il
10
13-——
F3
TP-17,
18
---—
F2
™
|
—-----
F3
™
2
------F2
™
3
----——
E3
™
7
----—-~
Bl
™
8
—---—--
C4
FW
7
----—-
B82
FW
8
—--—--—
C3
®
to
@-----
Dl
®
?
©
aay
E2
©
,
@------
83
to
(
--——
F2
©
to
@--——
44
EcsB
EcsB
SGD
DsG
Ld
i
2SA950
2SC
2236
28103
2SKI92A
si-7
si-8
si-lo
$s
2SA1015
PHONO
TAPE
poLey METAL
CrO2/NOR
:
2Scl8is
—_u
28C1923
MAIN
AMP
PCB
22193675
[U,S]
2SC380TM
—
22193712
I
28D1302
SERVICE
MANUAL
AC-M2
2)
VOLUME
P.C
BOARD
22193676
(U,
S),
22193713
(A,
C)
4)
SPEAKER
P.C
BOARD
22193677
(U,
S),
22193714
(A,
C),
BEAT
P.C
BOARD
22193678
(U,
S),
22193715
(A,
C)
and
LED
P.C
BOARD
22193679
(U,
S),
22193716
(A,
C)
SPEAKER
TERMINAL
R
L
anna
|
SPEAKER
PCB
$2
VR3O!
VR302
VR303 VR304
‘
:
2219367
7
22193714
3)
PHONO
P.C
BOARD
2219
3680
(U,
S),
22193717
(A,
C)
[aux]
BEAT
PCB
OO
Ore
|
22193678
[U.S]
22193715
i
7
—
Pe
D207
LED
PCB
22193679
[U,S|
22193716
PHONO
PCB
22193680
[U.S]
22193717
[A
SERVICE
MANUAL
AC-M2
16
5)
SWITCH
P.C
BOARD
22193674
(U),
22193711
(A,
C),
22193697
(S)
SWITCH
PCB
22193674
Sli-a
AY
Sil-b
=
ACIIO
to
120V/
220
to
240V
50/60Hz
SWITCH
PCB
22193711
ACI20V
6OHz
SWITCH
PCB
22193697
AC240V
50Hz
=
WARNING:
AINDICATES
SAFETY
CRITICAL
COMPONENTS
FOR
CONTINUED
SAFETY,
REPLACE
SAFETY
CRITICAL
COMPONENTS
ONLY
WITH
MANUFACTURER'S
RECOMMENDED
PARTS
AVERTISSEMENT:
AXIL
INDIQUE
LES
COMPOSANTS
CRITIQUES
DE
SECURITE.
POUR
MAINTENIR
LE
DEGRE
DE
SECURITE
DE
L'APPAREIL,
NE
REMPLACER
QUE
OES
PIECES
RECOMMANDEES
PAR
LE
FABRICANT
PCE
MANUAL
AC M2
SERV.
17
18
MEMO
ee
SS
eS
ee
eee
ee
ee
ES
ee
BOGS
ere
Lea
ee
Soe
See
oe
ea
a
ee
eee
ee
ee
ea
Se
Bones
oo
ginees
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