Sanyo M-G12 User manual
SERVICE
MANUAL
STEREO
CASSETTE
RECORDER
Power
Source
DOS
Det
het
hepsi
eethate
dye
Anakaaciave
6V
(UM-3,
HP
7,
AA
Cell,
Mignonzelle,
R
6)
x
4
Output
Power
.......0.0000.c
ccc
cece
e
ee
30mW
x
2
(Max.)
Current
Consumption
(at
Vol.
Min.)
Playback
mode
...................0.0005.
140mA
Fast
Forward/Rewind
mode............
170mA
Tape
Speed
2.0.0.0...
cece
cece
ees
1-7/8ips.+
3%
Fast
Forward/Rewind
Time
..............
160sec.
(with
C-60)
Torque
PIAVDACK
si.00seieateds
cool
een
occu
te
32
~
60g-cm
Fast
Forward/Rewind
...................
more
than
50g-cm
—Specifications
subject
to
change
without
notice.—
142
385
07
Wow
&
Flutter
......0....
0...
e
cece
eee
0.55%,
RMS
Frequency
Response
(Playback)
POQOS
cen
Gucevin
See
eantascdiaeteasonia
ns
63Hz
~
8,000Hz
MGs
ies
ues
aalonas
ad
bandana
aus
ee
63Hz
~
10,000Hz
Signal
to
Noise
Ratio
(with
Fe2Os)
......
more
than
40dB
Crosstalk
(with
Fe203)
Tack40
Track.
scjccssesizicssiveme
ass:
more
than
53dB
Channel
Separation
(with
Fe2O3)
.......
more
than
30dB
Hum
&
Noise
(at
Vol.
Min.)
..........0.....
—38dBs
Terminal
Impedance
FICAGDNONG
bcdc
ical
cidedeacaseaendcouseres
320,
WM-9390
DISASSEMBLY
INSTRUCTIONS
GENERAL
REMARKS
e
Before
disassembling
the
unit,
spread
a
soft
rubber
mat
or
a
cloth
on
the
workbench
to
avoid
scratches
and
grease
stains.
LED
e
Donotusea
material
which
is
likely
to
cause
static
electricity
because
transistors
and
ICs
may
be
easily
damaged
by
it.
e
Reassemble
the
unit,
noting
the
kinds
of
screws,
the
solder-
ing
and
arrangement
of
the
leads.
Refer
to
“Circuit
Diagram
and
Exploded
Views”
for
correct
assembly.
Orange
e
Before
disassembling
the
unit,
take
out
the
cassette
tape
rH
and
the
batteries.
White
CABINET
BOTTOM
REMOVAL
1.
Open
the
Cassette
Compartment
Lid
by
pressing
the
Stop
Button
and
take
out
the
cassette
tape
from
the
Compartment.
2.
Turn
over
the
unit
with
front
side
down
on
a
soft
surface
and
remove
the
Battery
Compartment
Lid.
Then,
remove
the
(6)
batteries.
®
3.
Remove
the
five
screws
(1
~
5)
fastening
the
Cabinet
b
Amplifier
P.C.Board
Bottom
and
lift
the
Cabinet
Bottom
away
from
the
unit.
Cabinet
Bottom
4
3.
Turn
over
the
P.C.Board
toward
the
front
of
the
unit
with
cau-
tion
not
to
damage
the
Playback
Head,
Motor
and
Battery
Terminal
leads.
4.
Reassembie
in
reverse
order.
NOTE:
When
unsoldering
the
removed
lead
wires,
refer
to
the
wiring
4.
Reassemble
in
reverse
order.
diagram
to
avoid
miswiring.
AMPLIFIER
P.C.BOARD
REMOVAL
MECHANISM
CHASSIS
REMOVAL
1
Follow
the
instructions
for
the
“Cabinet
Bottom
Removal”.
1.
Follow
the
instructions
for
“Cabinet
Bottom
Removal”
and
“Amplifier
P.C.Board
Removal”.
2.
Remove
the
screw
(6)
fastening
the
P.C.Board
and
unsolder
the
LED
leads
(White
and
Orange)
from
the
P.C.Board
to
pro-
2.
Remove
the
two
posts
(7
and
8)
and
the
screw
(9)
holding
tect
the
LED
indicator.
the
Mechanism
Chassis.
Cabinet
Top
DISASSEMBLY
INSTRUCTIONS
(continued)
Mechanism
Chassis
.
After
the
Cassette
Compartment
Lid
is
opened,
set
the
mechanism
in
the
playback
mode
by
pressing
the
Play
Button.
.
To
detach
the
Mechanism
Chassis,
lift
the
Mechanism
Chas-
sis
in
the
direction
of
the
arrow
until
the
Play
Button
is
re-
moved
from
the
button
hole
of
the
Cabinet
Top.
Then,
left
the
motor
side
of
the
Mechanism
Chassis
away
from
the
Cabinet
Top.
Reassemble
in
reverse
order.
ADJUSTMENTS
GENERAL
REMARKS
Before
adjusting
the
mechanism
of
this
unit,
wipe
the
tape
contacting
surfaces
of
the
Head,
Pinch
Roller
and
Capstan,
and
the
surfaces
of
the
driving
parts
such
as
the
Drive
Belt,
Take-up
Belt,
Flywheel
and
Pulley
with
a
soft
cloth
soaked
in
alcohol.
Trouble
may
occur
because
of
oil
and
grease
stains.
Carefully
handle
the
belt
because
grease
easily
attaches
to
it.
Then,
check
the
used
rubber
parts.
If
the
rubber
has
dete-
riorated
or
is
scratched,
replace
the
parts
with
new
ones.
NOTES
ON
HANDLING
THE
CHIP
ELEMENT
Pay
due
caution
to
the
following
items:
1.
Chip
Element
Solder
2.
Do
not
use
the
removed
chip
element
again.
Chip
Element
Solder
YU)
x
O
(Incorrect)
(Correct)
P.C.Board
Use
a
soldering
iron
of
less
than
30W.
*
The
soldering
iron
should
not
touch
the
body
of
the
chip
element.
Complete
soldering
in
a
short
time.
Apply
solder
to
the
chip
element
as
illustrated
below.
EQUIPMENT
REQUIRED
VTVM
Frequency
Counter
Dummy
Load
(330
)
Test
Tapes
*
3kHz
test
tape
(Example:
TEAC
MTT-111)
for
the
Tape
Speed
Adjustment
*
10kHz
test
tape
(Example:
TEAC
MTT-114)
for
the
Head
Azimuth
Adjustment
Alignment
Tool
NOTE:
Before
the
Electrical
Adjustments,
set
the
unit
as
follows:
<i
TORE
SWICD):
tc2
avd
Radeakntn
escllcarenuddets
ouiece
bout
ves
HIGH
*
Mute
Switch
...........
ccc
cece
cece
ec
eeccneceueeeuceuavens
OFF
*
Balance
Control
................0ceceeeee
O
(Center
Position)
*
Supply
a
regulated
DC
6V
power
to
the
Ext.
Power
Jack.
TAPE
SPEED
ADJUSTMENT
1.
Remove
the
Battery
Compartment
Lid
and
take
out
the
bat-
teries
from
the
compartment,
and
connect
the
regulated
DC
6V
power
supply
to
the
Ext.
Power
Jack.
Connect
a
frequency
counter
to
the
Headphones
Jack
as
il-
lustrated
and
insert
a
3kHz
test
tape
(Example:
TEAC
MTT-111)
into
the
Cassette
Compartment.
Frequency
Counter
3kHz
PHONES
©
Dummy
Load
330
3.
While
playing
back
the
test
tape,
adjust
the
tape
speed
by
Potentiometer
for
Tape
Speed
Adjustment
turning
the
potentiometer
(P301)
on
the
P.C.Board
with
an
alignment
tool
until
the
frequency
counter
reads 3kHz.
ADJUSTMENTS
(continued)
HEAD
AZIMUTH
ADJUSTMENT
1.
Open
the
Cassette
Compartment
Lid
and
remove
the
Azi-
muth
Cover
from
the
Lid
by
pushing
it
with
a
tweezers
in
the
direction
of
the
arrow.
Cassette
Compartment
Lid
Azimuth
Cover
2.
Connect
two
VTVMs
and
a
synchroscope
to
the
Headphone
Jack
as
illustrated.
Set
the
synchroscope
as
follows:
Pi
MMOD
vc
crease
partner
tecerin
cnet
neato.
CHOP
(chopped)
*
“SOURCE
+8
acs
c
acess
INT
(internal),
CH1
or
CH2
*
AUTO
(automatic)
Dummy
Load
330,
qn)
Dummy
Load
330
anny
IM
jaa=
@
PHONES
3.
Insert
a
10kHz
test
tape
(Example:
TEAC
MTT-114)
into
the
Cassette
Compartmnt
and
play
it
back.
:
—5-—
Azimuth
Adjusting
Screw
4.
While
playing
back
the
test
tape,
slowly
turn
the
azimuth
ad-
justing
screw
until
the
amplitudes
of
both
channel
output
wave
forms
become
maximum
and
the
wave
forms
overlap
as
well
as
possible
in
the
maximum
condition
of
the
VTVM
as
iilustrated.
Adjustment
Adjustment
S
ry”)
Playback
Head
5.
After
the
adjustment,
secure
the
adjusting
screw
with
paint
or
glue.
PARTS
LIST
ner
Part
No.
Description
Q’ty
PACKAGE
141
6
1419
65300
—_
individual
Carton
|
141
6
1449
82600
Styrofoam
Case
|
141
6
2519
08015
Poly
Cover
80
x
150
1
141
6
3919
42000
Plain
Pad
|
141
6
2519
12090
Poly
Cover
2
141
6
4559
00100
Serial
No.
Sheet
3
141
6
4729
37300
Red
Label
(Red)
3
ACCESSORIES
4
1529
70240
Headphones
1
141
0
1259
02700
_
Belt
Clip
Assy
1
141
2
1769
05100
Shoulder
Strap
1
141
2
1819
13900
Carrying
Case
1
141
6
4519
07700
Warranty
Card
1
141
6
4729
37321
POP
Label
1
141
6
4119
31586
Instruction
Manual
1
HEADPHONES
ss
4
1529
70240
Headphones
1
1
141
2
1769
06800
‘Slider
1
2
141
2
8219
32600
Stopper
2
3
141
2
1769
06700
Hanger,
Left
1
4
141
2
1769
06701
Hanger,
Right
1
5
141
2
1259
04900
Housing
2
6
4
1529
70280
Ear
Speaker
2
7
141
2
2449
44200
Baffle
2
8
141
2
4469
41900
Ear
Pad
2
9 4
2369
73640
Plug
Cord
1
10
141
2
3529
38200
Slide
Adjustor
2
CABINET
141
2
2449
45800
Sheet
1
141
2
2899
14000
Adhesive
Sheet
1
CAI
141
0
1119
88106
Completed
Cabinet
Top
(Silver)
1
CAI
141
0
1119
88105
Completed
Cabinet
Top
(Red)
|
CA2
141
2
4219
10602 Screw
(Silver)
+M1,7x4.0
1
CA2
141
2
4219
10601
Screw
(Red)
+M1.7x4.0
1
CA3
4
2029
71160
LED,
SLP-151B
(Battery)
(D1]
1
CA4
141
2
2419
27400
Azimuth
Cover
(Silver)
1
CA4
141
2
2419
27402
Azimuth
Cover
(Red)
1
CA5
141
2
7539
24300
Post
2
CA6
4
1329
78100
Amplifier
P.C.B.
Assy
[See
PCB1]
(Silver)
1
CA6
4
1329
78105
Amplifier
P.C.B.
Assy
[See
PCB1]
(Red)
1
CA7
141
2
4419
14901
Sheet
4
CA8
141
2
4219
08900
Screw
1
CA9
141
2
1639
50500
Volume
Knob
(Silver)
|
CAS
141
2
1639
50501
Volume
Knob
(Red)
1
CA10
141
2
4469
39000
Cushion
1
CA11
+141
2
1659
08900
Mute
Button
1
CA12
141
2
1649
19800
Tone
Knob
(Silver)
1
CA12
141
2
1649
19801
Tone
Knob
(Red)
1
CA13
141
0
1119
88200
Cabinet
Bottom
Assy
(Silver)
1
CA13.
141
0
1119
88202
Cabinet
Bottom
Assy
(Red)
1
CA14
=
141
2
2149
18300
Cabinet
Bracket
1
CA15
141
2
4219
27200
Screw
+M1.7x5.0
1
CA16
§=141
2
1339
28600
_
Battery
Lid
(Silver)
1
CA16
141
2
1339
28602
Battery
Lid
(Red)
1
CA17
141
2
4469
43200
Cushion
1
CA18
141
2
4219
30000
Screw
(Silver)
+M2.0x10
2
CAi8
141
2
4219
30001
Screw
(Red)
+M2.0x10
2
|
oO)
|
Ref.
No.
Part
No.
Description
Q’ty
CX1
101
3
1302
00711
Screw,
Pan
Hd.
+M2.0x7
1
CX2
101
3
1702
00614
Screw,
Bind
Hd.
(Silver)
+M2.0x6
2
CX2
101
3
1702
00618
Screw,
Bind
Hd.
(Red)
+M2.0x6
2
CX3
110
3
2101
70013
Spring
Washer-2
M1.7
1
CX4
127
3
1317
04014
PI
Screw-1,
Pan
Hd.
+M1.7x4.0
1
NOTES:
1.
Parts
order
must
contain
Model
Number,
Part
Number
and
Description.
2.
Ordering
quantity
of
screws
and
resistors
must
be
multiple
c
10
pcs.
CABINET
EXPLODED
VIEW
HEADPHONE
EXPLODED
VIEW
Ref.
No.
MC1
MC2
MC3
Mc4
MC5
MC6
MC7
MC8
MC9
MC10
MC11
MC12
MC13
MC14
MC15
MC16
MC17
MC18
MC19
MC20
MC21
MC22
MC23
MC24
MC25
MC26
MC27
MC28
MC29
MC30
MC31
MC32
MC33
MC34
MC35
MC36
MC37
MC38
MC39
MC40
MC41
MC42
MC43
MC44
MC45
MC46
MZ1
MZ2
MZ3
Part
No.
MECHANISM
141
0
3119
21600
141
2
4459
26800
141
2
4219
23300
4
5279
71240
141
2
4539
27601
141
0
7419
36700
141
2
8519
07500
141
2
3529
36500
141
2
8519
47400
4
2429
72250
141
2
4219
24500
141
2
8559
02500
141
0
5369
01900
141
2
4839
17500
141
2
4539
30600
141
2
5519
47200
141
0
5459
02000
141
2
8529
11600
141
2
4539
19800
141
0
5219
09400
141
2
5649
20600
141
0
5219
03701
141
2
7319
54700
141
0
7419
36600
141
0
7419
36500
141
2
7439
31000
141
2
3519
60800
141
2
8549
06800
141
2
8519
71200
141
2
8549
18200
141
2
4219
29900
141
2
7439
31100
141
0
3519
21500
141
2
3229
40300
141
2
4579
01400
141
2
4539
13000
141
2
5519
47000
141
2
5649
09900
141
0
5319
07300
141
2
8529
11700
141
2
7439
30700
141
2
5519
47500
141
2
4539
15700
141
0
7419
36400
141
2
5519
47100
141
2
4539
31500
101
3
1802
00311
101
3
2502
00611
112
3
1301
50082
MECHANISM
PARTS
LIST
Description
Chassis
Assy
Cushion,
Motor
Screw
Motor
[M1]
Washer
Play
Lever
Assy
Spring,
Stop
Lever
Base
Head
Spring,
Head
Play
Back
Head
[HD1]
Screw
Spring,
Supply
Supply
Reel
Assy
Washer
Washer
F.FWD
Gear
Pinch
Roller
Assy
Spring,
Pinch
Roller
Washer
Flywheel
Assy
Drive
Beit
Sub
Flywheel
Assy
Lock
Plate
Stop
Lever
Assy
Rewind
Lever
Assy
Review
Arm
Plate
Spring,
Lock
Plate
Spring
Spring
Screw
Power
Arm
Reel
Plate
Assy
Shield
Plate
Washer,
Take-up
Pulley
Washer
Take-up
Pulley
Take-up
Belt
Take-up
Reel
Assy
Spring,
ASO
Cancel
Take-up
Arm
Take-up
Gear
Washer
Fast
Lever
Assy
Fast
Gear
Washer
Screw,
Truss
Hd.
Screw,
Cylinder
Hd.
E
Ring
M6.0x10x0.25
+M2.0x3
-M2.0x6
M1.5
Q’ty
en
ee
ee
ee
ee
ne
ee
ee
en
ee ee
ee
ee
a
ee
OO
Ok
Ce
a
a
a
a a
an
a
a.
a
mrs
NOTES:
1.
Parts
order
must
contain
Model
Number,
Part
Number
and
Description.
2.
Ordering
quantity
of
screws
and
resistors
must
be
multiple
of
10
pcs.
MECHANISM
EXPLODED
VIEW
(Chassis
Top)
&——me14
MC13
——
M12
——-G
MC21
MC20
MECHANISM
EXPLODED
VIEW
Ccontinueq)
(Chassis
Bottom)
e—
Mc31
MC41
=
&—meas
Mcz6
hme
Pa
MC30
MC23
ig
P.C.BOARD
PARTS
LIST
aha
Part
No.
Description
Q’ty
AMPLIFIER
P.C.B.
ASSY
PCB1
4
1329
78100
Amplifier
P.C.B.
Assy
(Silver)
1
PCB1
4
1329
78105
Amplifier
P.C.B.
Assy
(Red)
1
141
2
3229
35900
Shield
Plate
|
$1
4
2319
75610
Slide
Switch
(Tone)
1
$2
4
2319
74630
Push
Switch
(Mute)
1
$3
4
2319
74490
Leaf
Switch
(Power)
|
J1
4
2359
75782
Jack
3P
(Headphones)
1
J2
4
2359
72954
—
Ext.
Power
Socket
1
VR1
4
2229
73910
Volume
Control
(Volume,
A-20kQ)
1
VR2
4
2229
73900
Volume
Control
(Balance,
G-20kQ)
(Silver)
1
VR2
4
2229
73901
Rotary
Volume
(Balance,
G-20kQ)
(Red)
1
P301
4
2229
73511
—
Potentiometer
(B-3k() 1
IC1
4
2069
70670
IC,
M51521L
1
IC2
206
5
3374
17810
IC,
LA4178
1
(C301
206
5
1555
51220
‘IC,
LA5512
1
TH301
204
5
9000
00200
Thermister,
SDT
20
|
C1
CD2
2
763A
0001V
Electrolytic
220uF
6.3V
|
C2
CD3
3
663A
0001V
Electrolytic
33uF
6.3V
1
C3
CD47
7100
0003V
Electrolytic
470uF
10V
1
C4
CD4
7
7100
0003V
Electrolytic
470unF
=
=610V
1
C101
CC1
0
2500
KEOOC
Ceramic
0.0014F
50V
+10%
1
C102.
CD10
5500
0001V
Electrolytic
1uF
50V
1
C103.
CC5
6
1500
KEO0C
Ceramic
560pF
50V
+10%
1
C104
=CD4
7
663A
0001V
Electrolytic
47uF
6.3V
1
C105
M33
3500
KOOMV
Mylar
0.033uF
50V
+10%
1
C106
CDi
0
6160
0001V
Electrolytic
10uF
16V
1
C107
CD47
5250
0001V
Electrolytic
47uF
25V
1
C108
CCt
0
2500
KEOOC
Ceramic
0.001uF
50V
+10%
1
C109
=CD3
3
663A
0001V
Electrolytic
33uF
©66.3V
1
C110
=CD2
2
763A
0001V
Electrolytic
220uF
6.3V
1
C111.
M10
3500
KOOSV
Mylar
0.01uF
50V
+10%
1
C112
§
€C1
21500
KEOOC
Ceramic
120pF
50V
+10%
1
C201.
+
CC1
0
2500
KEO0C
Ceramic
0.001uF
50V
+10%
1
C202
CD10
5500
0001V
Electrolytic
1uF
650V
1
C203.
C56
1500
KEQOC
Ceramic
560pF
50V
+10%
1
C204
CD47
663A
0001V
Electrolytic
47uF
66.3V
1
C205
M33
3500
KOOMV
Mylar
0.033uF
50V
+10%
1
C206
CD10
6160
0001V
Electrolytic
10uF
16V
1
C207
CD47
5250
0001V
Electrolytic
47uF
25V
1
C208
CC1
0
2500
KEO0C
Ceramic
0.0014F
50V
+10%
1
C209
CD33
663A
0001V
Electrolytic
33uF
6
-6.3V
1
C210
CD22
763A
0001V
Electrolytic
220uF
866.3V
1
C211
M10
3500
KOOSV
Mylar
0.0iuF
50V
+10%
1
C212
CC1
2
1500
KEOOC
Ceramic
120pF
50V
+10%
1
C301
CD47
4500
0001V
Electrolytic
0.47uF
50V
1
C302
Cl2
2
3250
KFOOC
Boundary
0.022uF
25V
+10%
1
R1
RD1
8
1251
JMO000
Carbon
1800
1/4W
+5%
1
R2
RD2
7
1251
JMO00
Carbon
2700
1/4W
+5%
1
R3
RD6
8
1251
JMO00
Carbon
6800
1/4W
+5%
1
R4
RD4
7
1251
JMO00
Carbon
4702
1/4W
+5%
1
R5
RD4
7
A251
JMO00
Carbon
470
1/4W
+5%
1
R101
=RD6
8
3251
JMO00
Carbon
68kQ
1/4W
+5%
1
R102
RDI
6
1251
JMO00
Carbon
1600
1/4W
+5%
1
R103
RD43
2251
JMO00
Carbon
43kQ
1/4W
+5%
1
R104
=
RD1
5
2251
JMO00
Carbon
1.5kQ
1/4W
+5%
1
R105
RD1
0
4251
JM000
Carbon
100kQ
1/4W
+5%
1
R106
~=RD1
2
2251
JM000
Carbon
1.2kQ
1/4W
+5%
1
R107
RD6
8
0251
JMO0O0
Carbon
68Q
1/4W
+5%
1
R108
=
RD1
5
1251
JMO00
Carbon
1500
1/4W
=
+5%
1
R109
=
RD1
0
3251
JNOOO
Carbon
10kQ
1/4W
=
+5%
1
R110
RD2
2
A251
JMOOO
Carbon
2.20
1/4W
+5%
1
R111
RDt
0
2251
JMO00
Carbon
1kQ
=
1/4W
+5%
1
R201
RD6
8
3251
JMO00
Carbon
68kQD
1/4W
+5%
1
R202
RDI
6
1251
JMO00
Carbon
1600
1/4W
+5%
1
R203
RD4
3
2251
JMO00
Carbon
43kQ
1/4W
+5%
1
shad
Part
No.
Description
Q’ty
R204
~=RD1
5
2251
JMOOO
Carbon
1.5kQ
1/4W
+5%
1
R205
RD1
0
4251
JMO00
Carbon
100kQ
1/4W
+5%
1
R206
RD1
2
2251
JMOOO
Carbon
1.2kQ
1/4W
+5%
1
R207
=
RD6
8
0251
JMOOO
Carbon
68
1/4W
+5%
1
R208
RD15
1251
JMOOO
Carbon
1500
1/4W
+5%
1
R209
RD1
0
3251
JMO000
Carbon
10kQ
1/4W
+5%
1
R210
RD2
2
A251
JMO00
Carbon
2.20.
1/4W
+5%
1
R211
RD1
0
2251
JMO000
Carbon
1kQ
1/4W
+5%
1
R301
RD4
7
1251
JMO00
Carbon
470
1/4W
+5%
1
R302.
RD27
1251
yMO000
Carbon
2709
1/4W
+5%
1
R303.
RDS
6
2251
JMO000
Carbon
5.6kQ
1/4W
=
+5%
1
R304
RD1
2
2251
JMO00
Carbon
1.2kQ
1/4W
+5%
1
NOTES:
1.
Parts
order
must
contain
Model
Number,
Part
Number
and
Description.
2.
Ordering
quantity
of
screws
and
resistors
must
be
multiple
of
10
pcs.
AMPLIFIER
P.C.BOARD
ae
:
ee
Sadunian
random
tana
i
e
ae
Heine
nonce
vagrant
‘
Bh
:
Ria
arec
i
Pay
OREN
;
eer
pa
is
BA
as
ONES
i
‘R2
‘
a
es
se
Jl
HEADPHONES
JACK
Sse
sdegie
nae
et
ea
Ce
ae
are
Ee
ce
YELLOW
alate
as
tan
re
sey
-_
ce
Sapan
Be)
|
2
7
ae
Oe
y
:
a
ee
S
es
Ye
ood.
ane
“AA”
CELL
X
4
6V
S2
MUTE
SWITCH
OFF
<——>
ON
SI
|
HDI
TONE
SWITCH
|
PLAY
BACK
HEAD
LOW
(RIGHT
)
ue
Me
an
:
noes
ee
SAS
SUNS
E
ESR
SS
:
RN
sraronvents
et
i
Oe
2
Sri
pe
a
uate
%
ES
Vi
2
ee
i
4
es
:
“
Beoatetatt
peta
ves
A
Rca
&
SA
eu
amoeteia
a
ee
:
eae
ae
Ce
a
:
a
sera
rani
be
eae
te
1
sin
dais
uta
&
panne
sane
We
es
a
an
3
a
ie
CONTROL
RENEE
OE
EE
oni
ie
eat
as)
eam
eegwanaem
nce
se
fea
ay
Pe
AD
Ha
Bua
Late
a
EER
RU
UN
SEI
Resi
al
:
ye
foe
Bee
i
Ee
ce
ee
:
:
eet
TEES
SN
ord
Lidl
EE
iB
es
nen
tre
aumion
PONS
ERS
ae
SN
eae
aoa
sa
ee
ao
ef
ce
me
co.
So
oe
BLACK
ey
ON
hil
ei
Ma
a
ee
ae
ee
ad
ie
ORANGE
DI
(
BATTERY
)
—13-
tA
SCHEMATIC
DIAGRAM
ic)
MS1521L
ice
LA4I78
PRE-AMPLIFIER
POWER
AMPLIFIER
6V
+
R5
HDI-1
C102
C34
nC
4
PLAY
HEAD
lu
50V
470u]
—
4.7
-|
470u
=e
$
lOV=
=
10V
x
=
eal
0
i
CIO}
a
[0.001
RIO3
RIO5
C108
CIO
RI1O
LEFT
CH
4300
lOOK
0.00lu
220u6.3V
2,
:
cioggt]
Riog
|
oF
-
Lem
33u]-|
!OK
[9-0
RIO8
150
4.02V_}4.02v_|3.43v_|2.68v
|ov=
4
12
I
10
9
HEADPHONES
1C2
JACK
3
4
5
6
4
.
5.94V
|4.02v
|4.02v
|3.43v
|[2.68Vv
C206
1
RIGHT
CH.
R203
R205
lOul6V
1200
4300
100K
€208
|
R209
R210
co04
tt
68
=
0.00lu|
IOK
+.—
HDI-2
"ea
Sé0P
By
eee
R204
|
C205
S2-2
1000
207
156
oe
ae
6.01
+
.
z
4.74
33u
1-
yy
.
pa
Daina
Sees
Tico”
2)
dy
1900
0.0534
SS
o
25V
ueor
6.3V
R20g.
«G3
[00
.
,
<
=a
Nes
eoor.
CaOe),
Herr
SI-2
v
R301
se
To.0om
|
.
470
=
R3
$3
680
P
POWER
SWITCH
ic301
LAS512
zoo!
R4
®)
DI
:
-
470
SLP-151
MOTOR
GOVERNOR
CIRCUIT
MI
TAPE
SPEED
ATTERY
300%
ADU.
MOTOR
=
_-+(BATTERY)
J2
EXT.
POWER
JACK
ee
”
5.18V
ae
eaves
oan
"
C30
t
50V
~
T
0.022
$1
|
Tone
Switch
.
S2
|
Mute
Switch
OFF
S3
|
Power
Switch
=>
=16-
IC
LEAD
IDENTIFICATION
M51521L
FRONT/BOTTOM
VIEW
M51521L
BLOCK
DIAGRAM
a
aa
12345
67
8
manonan
ant
INT)
=
Feedback
1
OUT
1
Vcc
GND
IN2
Feedback
2
QUT2
LA4178
BOTTOM
VIEW
LA4178
BLOCK
DIAGRAM
12345
67
1413121110
9
8
LA5512
FRONT/BOTTOM
VIEW
LA5512
BLOCK
DIAGRAM
Reference
Voltage
Circuit
Mm
(_.)
Constant-Current
SANYO
ELECTRIC
TRADING
CO.,
LTD.
OSAKA,
JAPAN
December/’82/3,000
Printed
in
Japan
Table of contents
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