Sansui P-M7 User manual

oe
OMAT.
ie

1. BLOCK DIAGRAM
Terminal MB884 1-566M)
36
fO3
B Sensor 1LD2 “=e K f06 Isnal
> al
K 1
C Sensor f{LO3 Za O7 _ i3 2
pb
U
Sensor
uP
=
>
D Sensor o-o DOWN _
Micro Switch
Sensor Sensitivity Selection
Micro
Computer
f1C3
MB884)
- 566M
aul
i Computer
+5V +5V Editing
QL Ind
fQ gLDe
” '
bs
t{
gLDi}/
Music
ty > iy s Selection nd 4
fC 107]
7
| ' gi De 1
Nay i Repeat Ind |
fie)
i) CPU ind
fO1 gLDIo
Normal
Speed Select
33% rpm 50H2
45rpm_)— 67 SHz
| SSD-1_MOTOR CONTROL
Driving
Tone Arm
Vertically
Driving
Tone Arm
Horizontally
Analog Switch
TC9I24P
PLL

P-M7
2. OPERATIONS (see Fig. 2-1, Fig. 2-2, Fig. 2-3, Timing Chart and Block Diagram)
This fully-automatic player is of the linear tracking arm type, being
provided with the following various functions:
1) automatic random music selection (seven musics);
2) automatic record disc size selection (30cm- 25cm-and 17cm-dia.
discs);
3) automatic speed selection according to disc sizes (33 1/3 rpm
and 45 rpm); and
4) computer editing in cooperation with a cassette deck (D-M7,
SC-A33, D-570, and D-370).
2-1. Fully-automatic System Outline
This fully-automatic system player comprises 1) an automatic
mechanism for driving a tone arm horizontally and vertically and 2)
a control section for electrically contro! the automatic mechanism.
The automatic mechanism assembly includes tone arm position sen-
sors (A, B and C sensors), lifter position sensors (UP and DOWN sen-
sors), an arm servo sensor, and an automatic disc size selection sen-
sor (E sensor) and an automatic music selection sensor (F sensor)
both mounted on the tip of the cartridge, in addition to the auto-
matic mechanism, in order to detect the conditions of the tone arm.
The control section includes a microcomputer MB 8841-566M and
its peripheral circuits, in order to control 1) start/stop of a DD
motor, 2) lead-in, lead-out, return, repeat, and up-and-down move-
ment of the tone arm, and 3) automatic disc size selection, auto-
matic music selection and automatic disc speed selection, in re-
sponse to each output signal outputted from each sensor.
2-2. Automatic Mechanism Assembly Operation
1. Inorder to drive the automatic mechanism assembly, that is, to
drive the tone arm horizontally for tone arm lead-in and lead-out
operations, the revolution power of the micromotor (I) is trans-
mitted through a belt (A), a warm gear (A) a drive gear, and a
wire.
2. In order to drive the tone arm vertically for tone arm up-and-
down movement, the revolution power of the micromotor (Il) is
transmitted through a belt (B), a warm gear (B), a lifter cam, and
a lifter plate. The tone arm is driven vertically by moving up and
down an arm holder weight mounted on an arm shaft.
2-3. Each Sensor Function For Fully-automatic
Operation :
A. A Sensor, B Sensor, and C Sensor
As shown in Fig. 2-2, the A, B, and C sensors detect tone arm posi-
tions required for automatic operation in such a way that three
phototransistors (fQ5, fQ6 and fQ7) are turned on or off whenever
a position guide moves between three phototransistors mounted on
a sensor holder and covered by a slit plate and three LEDs (fLD1,
fLD2 and fLD3).
The A sensor detects the lead-in positions of 30cm-, 25cm-, and
17cm-dia. discs and the lead-out position of a 17cm-dia. disc. Fur-
ther, the B sensor and the C sensor detect in combination the disc
size selection positions of 30cm-, 25cm-, and 17cm-dia. discs.
The B sensor detects the lead-out positions of 30cm- and 25cm-dia.
discs and the positions required for operating the automatic music
selection sensor (E2 sensor). That is to say, when the E2 sensor
detects some lead-over groove while the B sensor is kept turned on
(in this case the input port pin No. 27 of the microcomputer is at a
L-voltage level), the tone arm stops and begins to come down.
The C sensor detects the disc size selection position of a 17cm-dia.
disc in combination with the A sensor.
B. UP (U) Sensor and DOWN (D) Sensor
The U sensor and D sensor are made up of a lifter cam and two
microswitches. The U sensor detects the up-position of the tone
arm, and the D sensor detects the down-position of the tone arm.
When the U sensor or D sensor detects the up- or down-position of
the tone arm, the terminal of each microswitch is grounded.
C. E Sensor and F Sensor
Being mounted on the tip of the cartridge, the E sensor and F sensor
supply three signals required for automatic disc size selection and
automatic music selection to the microcomputer, after having di-
vided the output signals into E2, E3 and F2 signals through an elec-
tric circuit.
@ £2 signal
The E2 signal is a music number counting signal required for moving
down the tone arm at a desired music position during the automatic
music selection operation. When the E sensor detects a desired lead-
over groove and the E2 signal is generated (changes to a H-voltage
level) (in this case, the input port pin No. 33 of the microcomputer
changes to a L-voltage level), the tone arm stops moving horizontally
and next begins coming down.
Arm Shaft Bearing
Fig. 2-1
Wire
=> ¢z=
yr
y
se
=
7
@ © in}
Drive Gear $2
Auto Mechanism Ass‘y
Position Guide
Warm GearlA) Belt(A)
a] |
[
A,B,C Sensor
$-01 12105106 07)
Sht Plate
Asia) |
Guide
$-011 11101 .f102.1103)
Fig. 2-2
Warm Gear(8) D Sensor
Micro SW.
Lifter Cam
Sensor Holder
E, F Sensor LI

P-M7
e@ £3 signal
The E3 signal is a signal to detect the size and the presence or ab-
sence of a disc. In the tone arm lead-in operation, if the E3 signal is
generated (changes from a L-voltage level to a H-voltage level) (in
this case, the input port pin No. 4 of the microcomputer changes
from a H-voltage level to a L-voltage level) when the A, B and C
sensors are generating the respective signals as depicted within the
zones (A) ®) and © shown in Fig. 2-3, the respective disc sizes of
30cm, 25cm and 17cm are selected.
After the E3 signal has been generated within the zones@,®)and©
shown in Fig. 2-3, the tone arm stops moving horizontally and next
comes down when the A sensor generates a L-voltage level signal (in
this case, the input port pin No. 26 of the microcomputer changes
to a H-voltage level) or a H-voltage jevel signal (in this case, the
input port pin No. 26 of the microcomputer changes to a L-voltage
level). Further, in the case where no E3 signal is generated within
the zones@,® and © it is determined that there is no disc on the
turntable.
@ F2 signal
Being different from the E2 and E3 signals, the F2 signal is a signal
to indicate that the F sensor detects a lead-over groove when the
stylus is tracing a music ona record disc.
The F2 signal serves as follows:
The fead-over groove of each music is detected in the automatic
music selection operation. In the case where the last music ona re-
cord disc is selected, the instant the last lead-over groove (lead-out
groove) is detected, the F2 signal changes from a L-voltage level to a
H-voltage level (in this case the input port pin No. 33 of the micro-
computer changes to a L-voltage level, so that the tone arm begins
to return.
Fig. 2-3
Position Guide
A SENSOR
B SENSOR
C SENSOR
B SENSOR | 27
C SENSOR | 28
E3 SENSOR | 4
Selection Z Selection
77cm
Zone Zone Selection Zone
17cm Play
30cm Play
D. Arm Servo Sensor
While
the
stylus
is
tracing
a
music
on
a
disc,
it
is
necessary
for
the
stylus
to
be
in
contact
with
the
disc
at
a
right
angle
to
the
modu-
lated
glooves
formed
in
the
disc.
The
arm
servo
sensor
detects
stylus
inclination
from
a
right
angle
to
the
modulated
grooves,
while
the
stylus
moves
on
a
disc.
The
incli-
nation
angle
of
the
stylus
is
checked
by
a
photo
interaptor
of
the
arm
shaft
bearling
and
two
photo
couplers
(fQ8
and
fQ9).
When
the
stylus
inclines
from
the
right
angle,
the
photocoupler
fQ8
or
fQ9
is
turned
on
according
to
the
direction
in
which
the
stylus
inclines,
in
order
to
activate
the
analog
switch
f1C6.
In
response
to
the
signals
from
the
photocouplers,
the
micromotor
(il)
rotates
clockwise
or
counterclockwise
in
order
to
control
the
tone
arm
so
as
to
be
in
contact
with
the
modulated
groove
at
a
right
angle.
E. Music Selection Sensitivity Switching Circuit
The automatic music selection operation must be accurate, without
producing any positioning error when moving down the tone arm
onto a disk, even if there are various dimensions in the width of
lead-over groove.
This music selection sensitivity switching circuit can adjust the sen-
sitivities of the E2 and F2 signals at the same time. As shown in
the block diagram, the reference voltage applied to the comparator
is adjusted to three stages by using a sensor sensitivity selector
switch.
2-4. Microcomputer Output Peripheral Circuits
A. Micromotor control circuit
1. Operation of tone arm horizontally driving micromotor (1)
The
micromotor
operates
according
to
the
tone
arm
up:
or
down-condition as follows:
@ Where the tone arm is up;
When
the
pin
No.
22
of
the
microcomputer
becomes
a
L-voltage
level, the micromotor (1) rotates counterclockwise to perform
the
lead-in
operation.
On
the
other
hand,
when
the
pin
No.
23
of
the
microcomputer
becomes
a
L-voltage
level,
the
micromotor
(I) rotates clockwise to perform the lead-out operation.
@ Where the tone arm is down;
When
the
tone
arm
is
in
a
down-state,
the
micromotor
(1)
rotates
clockwise
or
counterclockwise
in
response
to
the
output
signal
from
the
arm
servo
sensor
(fQ8
and
fQ9)
to
control
the
tone
arm.
Further,
when
the
tone
arm
is
down
(in
playing
a
music),
since
the
pins
No.
6
and
No.
12
of
the
analog
switch
become
a
L-
voltage
level,
the
micromotor
(1)
does
not
rotate
in
response
to
the
output
signal
from
the
pins
No.
22
and
No.
23
of
the
micro-
computer.
2. Operation of tone arm vertically driving micromotor (I)
When
the
pin
No.
24
of
the
microcomputer
becomes
a
L-voltage
level,
the
micromotor
(I)
rotates
counterclockwise
to
move
the
tone
arm
up
or
down.
If
the
UP/DOWN
key
is
depressed
while
the
tone
arm
is
moving
up
or
down,
the
pin
No.
25
of
the
micro-
computer
becomes
a
L-voltage
level
and,
therefore,
the
micro-
motor
(II)
rotates
clockwise
to
move
the
tone
arm
up
or
down.
B. 33 1/3 and 45 rpm Automatic Selection Circuit
According
to
the
size
of
a
disc,
the
revolution
speed
(33
1/3
or
45
rpm)
of
the
turntable
is
automatically
determined.
When
the
E3
sensor
detects
a
30cm-
(25cm-}
dia.
disc
and
a
17cm-dia.
disc,
the
pin
No.
20
of
the
microcomputer
outputs
a
L-voltage
level
signal
for
the
30cm-
(25cm-)
dia.
disc,
and
a
H-voltage
level
signal
for
the
17cm-dia.
disc.
This
output
signal
is
inputted
to
the
pin
No.
10
of
the
DD
motor
control
IC
(TC
9142P
:
elC1)
via
the
speed
selector
switch
(fS2).
The
turntable
rotates
at
a
speed
of
33
1/3
rpm
when
the
pin
No.
10
of
elC1
is
at
a
L-voltage
level,
and
at
a
speed
of
45
rpm
when
the
pin
No.
10
of
elC1
is
at
a
H-voltage
level.
The
relationship
between
the
speed
selector
switch,
the
record
disc
size,
and
the
revolution
speed
is
listed
in the
following
table:
SPEED SELECTOR RECORD SIZE
Sw(fS2) 30, 25cm-dia. | 17cmrdia.
MB8841 Pin No. 20 H
NORMAL TC9142P Pin No. 10 | H
Speed (rpm)
| wB3e4i Pin No. 20
INVERSE TC9142P Pin No. 10
Speed (rpm)

C. DD Motor Control Circuit
If the START/STOP switch is depressed when the turntable stops, a
L-voltage level signa! is outputted from the pin No. 19 of the micro-
computer and is inputted to the pin No. 11 of the DD motor control
IC (TC9142P), When a L-voltage level signal is inputted to the pin
No. 11, the turntable rotates.
D. Music Selection Indicator Circuit
In the automatic music selection operation, the selected musics are
stored into the microcomputer and displayed on the indicator.
In playing a music, the indicator light blinks as follows:
When the tone arm lead-in operation stops in a modulated groove,
the indicator light begins to blink the instant a lead-over groove is
detected (the F2 signal changes from a L-voltage level to a H-voltage
level). Further, when the tone arm stops in a lead-over groove, the
indicator light begins to blink the instant the micromotor (II) stops.
Furthermore, in continuously playing musics, the indicator light
begins to blink the instant a lead-over groove is detected (the F2
signal changes from a L-voltage level to a H-voltage level).
E. Computer Operation Indicator Circuit
The output signal from the pin No. 17 of the microcomputer turns
on or off the fQ1, so that the indicator light blinks.
The indicator light blinks during the micromotor (1) or (II) is ro-
tating. However, in case of such a miss-programming that only one
music number not included in a record disc is selected or in case of
no record disc, the indicator blinks much faster then its of normal
operation after the return operation begins.
® MICRO COMPUTER
Timing chart 1 AUTO MUSIC SELECTION 2-3-5 (30cm, 33 rpm)
MICRO COMPUTER MB8841-566M
AUTO MUSIC SELECTION 2-3-5(30cm, 33rpm)
MUSIC SELECTION (2-3-5)—*LEAD IN( 1 )—>PLAY2—>
P-M7
F. Muting Circuit
The muting circuit is a circuit to short-circuit the output signal from
the player, where necessary.
The muting operation is performed by using the output signal from
the pin No. 18 of the microcomputer.
1) tn the automatic disc size selection and the UP/DOWN key de-
pression, the muting is off when the tone arm is down, and is on
when the tone arm is up.
In the automatic music selection operation (See Timing Chart),
the muting is off the moment the tone arm moves down com-
pletely after the lead-in operation (the micromotor (Il) stops
rotating counterclockwise).
Further, when the stylus moves down onto a modulated groove,
the muting is off the moment the F sensor detects a lead-over
groove (the F2 signal changes from a H-voltage level to a L-
voltage level).
2
—
G. Computer Editing Circuit
In the same way as in the muting circuit of the player, the computer
editing operation is performed by connecting the output signal from
the pin No. 18 of the microcomputer to the pause circuit of a
cassette tape recorder through a AND circuit. This circuit controls
the recording on-or-off operation on the cassette tape recorder side
in accordance with the automatic operation on the player side.
in other words, when the muting on the player side is on (the pin
No. 18 of the microcomputer is at a L-voltage level), the pause on
the cassette deck side is on; when the muting on the player side is
off (the pin No. 18 is at a H-voltage level), the pause on the cassette
deck side is off.
Tess Ie
Parmer eee ST ARSENE |
INPUT/OUTPU PIN No. —PLAY3—>CUT (UP/DOWN) ->PLAYS—>LEAD OUT Iga LTO FTA Oo pat A
<= | ES
Ra | 26
BS Rs 27
c Re | 28
U R7 | 29
SENSOR }|——+——_]
D | Re | 30
is E2 | Tc | 8
—
& E3 IRQ 4 30cm Selection
UP/DOWN SW. _| Ris, K2| 35, 40 } tL Ube Hoown
Ris, K2| 37,
MUSIC 2." [Risse 92,40: _ oa eae a
SELECTION} 3 |Ris, K:| 37,39 | |
Sw. 7
5 Ria, Ko] 36, 38
ey a Se BZ y | a)
MOTOR(I) | cow | Ro | 22 ||
MICRO. | cw | R 25 i
MOTOR (II) iz | (|
(Lifter) CCW |} Ra 24 OOWN uP uP DOWN uP
bb START BOWN
5 [DDMOTOR Jerop | Os | 19 ia |_|
2 MUTING Os | 18 ON OFF Fon [FL ow _| OFF ON
SPEED 33/45rpm. | Or | 20 L bet
nee P| io) bee ss §@H Weems TT
—— ee 2
SELECTION Pe | il [n/n
i 3 3
ar) ERE

P-M7
@ MICRO COMPUTER
Timing chart 2 AUTOMATIC RECORD SIZE DETECTOR (17cm, 45 rpm)
AUTOMATC RECORD SIZE DETECTOR
MICRO COMPUTER MB8841-566M (izem --45rpne)
St ta | Arm Rest
INPUT/OUTPUT
PORT
|PIN No.)
17cm
LEAD
IN-PLAY->REPEAT—>CUT—
RETURN
Point
AB
Ra
26
|
27
28
SENSOR
17cm Selection 17cm Selection
[ START/STOP SW |Ko. Rial 38, 34
T
REPEAT SW Ka, Ria| 41, 35
Ri
Micro
Motor (I )
LEAD IN
Micro
Motor (II )
(Lifter)
SPEED 33/45rpm
REPEAT IND.
DD MOTOR $ct8T
OUTPUT
Lighted
® MICRO COMPUTER
Timing chart 3 MANUAL RECORD SIZE DETECTOR (17cm, 45 rpm)
MANUAL RECORD SIZE DETECTOR
MICRO COMPUTER MB8841-566M (17em_ 45rpm)
INPUT/OUTPUT
PORT
|PINNo.)
17cm
LEAD
IN(MANUAL)—>PLAY—>
CUT
PLAY>LEAD
OUT—
RETURN
Re 28
R7 29
Re 30
SENSOR
IRQ 4 7cm Selection
START/STOP SW | Ko, Ri2j 38, 34
UP/DOWN SW Ka, Ris} 40, 35
MANUAL <4 SW Ki, Ri3| 39, 35
MANUAL ® SW Ko, Ri3| 38, 35
Micro RETURN
Motor (I )
Micro R3
Motor (II )
(Lifter)
[oo moToR Eis
MUTING
SPEED 33/45rpm

3. ADJUSTMENTS
Note: Before adjustments of 3-1 and 3-2, remove the arm rest only.
3-1. Adjustment of Automatic Disk Size
Selection Operation (See Figs. 3-1, 3-3 and 3-4)
1) By using 30cm size record, actually carry out the automatic disk
size operation (lead-in operation). Adjust the lead-in adjusting
cam (See Fig. 3-4) by the tone arm placed on the arm rest (the
Position @ as shown in Fig. 3-3 so that the stylus tip may
come down to the position (the lead-in groove position) 146 mm
away from the disk center (See Fig. 3-1).
By using 17cm size record, actually carry out the automatic disk
size operation (lead-in operation). Confirm that the stylus tip
may come down to the lead-in groove position.
i)
—
Fig. 3-1 Cartridge
wer Disc
Pea es 46mm
3-2. Adjustment of Automatic Music Selection
Operation (See Figs. 3-2, 3-3 and 3-4)
@ Required disc and measuring instruments
1) Tester (DC voltmeter)
Input impedance: 50kohm/V or more. (The higher, the better)
2) A vinyl chloride record disc without grooves or with wider lead-
out spiral than usual.
3) Arule with graduation marks starting from the edge.
A. Tone Arm Height Adjustment
Adjust the stylus and disk as shown in Fig. 3-2, by rotating the tone
arm height adjusting screw (See Fig. 3-4) to the position @) as
shown in Fig. 3-3. (Stop the stylus at a position about 130 mm away
from the disk center.)
Fig. 3-2
wi Disc without grooves
Disc with grooves
! eceereyeUuN
| Lead-out groove
Fig. 3-4
Tension Adjusting
Screw
Make two(2) turns:
around this
P-M7
B. Sensitivity adjustment of E and F sensor
1. Setting
At the tone arm position, in case of a record disc without
grooves, stop the stylus at a position about 10 cm away from the
disc center. In case of a record disc having grooves, stop the
stylus above the flat surface nears 10 cm away from the disc
center.
2. How to adjust (See Fig. 3-3, Top View on Page 8)
a) Connect the DC voltmeter across the test terminal E and G
(ground) and then adjust the voltage to DC 1V by rotating the
volume (fVR1) <E sensor adjustment>
Connect the DC voltmeter across the test terminal F and G
(ground) and then adjust the voltage to DC 1V by rotating the
volume (fVR2) <F sensor adjustment>
Note: When adjusting both the sensors with the stylus stopped on a
lead-over groove of an ordinary record disc, note that there is
a difference in detection position between E sensor (leading
sensor) and F sensor.
b
—
C. Level adjustment of F2 signal
1. Setting
Set the stylus in the same way as described under Section 2, and
then move the tone arm downward. (Check that the stylus stays
ona lead-over groove.)
2. How to adjust (See Fig. 3-3, Top View on Page 8)
a) Connect the DC voltmeter across test terminal Fz and G (ground)
and then adjust the voltage to DC 1V by rotating the volume
(fVR3).
Fig. 3-3
Tone Arm Height
Adjusting Screw
Lead-In
Adjusting Screw
Test Terminal
Arm Servo Adjusting Cam
Sensor Holder
Fastening Bolt
‘Tone Arm Height
Adjusting Screw
Lead-In
Adjusting Cam

P-M7
D. Delay adjustment of E, signal
1. Setting
Use the record disk in which many musics (about seven music
tracks) are recorded, and select three music tracks having lead-over
grooves,
respectively,
near
positions
70mm,
100mm,
and
130mm
away from the disc center.
2.
Adjustment
(See
Fig.
3-5,
Top
View
on
Page
8)
Perform the respective lead-in operations for three selected music
tracks, and adjust the operations by rotating the volume (fVR4) as
shown in Fig. 3-3 so that the stylus comes down on or a little before
the
lead-over
grooves
for the
three
music
tracks.
If
the
volume
(fVR4) is rotated clockwise, the lift-down position of the stylus is
shifted inward.
Note: In the lead-over grooves existing on a 70mm-or-less from the
center, the misplacing of the arm in detection position occurs
inevitably.
Fig. 3-5 Cartridge
Disc
5/4 3 2)
! 7,6
Jom ——--|
10cm
13cm
Note: Remove the cabinet before adjustments of 3-3 and 3-4.
How to remove the cabinet. (See Top View on Page 8)
Unscrew
seven
cabinet-mounting
screws
on
the
bottom
of
the
chassis,
Remove
the
E-ring
fixing
the
turntable
to
the
spindle
of
the
motor.
3) Remove the player case cover.
4)
Move
the
tone
arm
to
the
player
case
cover
Position
by
depress-
ing
the
MANUAL
key
(
4
),
before
removing
the
cabinet.
3-3. Arm Servo Adjustment (See Fig. 3-4, Fig. 3-6)
A. Setting
1) Move the tone arm leftward and stop it within the record-play-
able range by depressing the MANUAL key ( > ).
2)
Move
the
tone
arm
downward
by
depressing
the
UP/DOWN
key.
B. Adjustment
1) Loosen the sensor holder fastening bolt, and adjust the arm servo
adjusting
cam
so
that
the
tone
arm
does
not
move
in
either
direc-
tion, in the state where the tone arm is in the down position.
-e@
—
2
—
2)
After
adjustment,
check
that
the
voltage
across
the
connector
terminals
No.
9
or
TP6
and
GND
of
S-0107
(across
the
terminals
of
the
micromotor
(I)
is
within
OV
+1V
when
the
sensor
holder
fastening
hexagon
bolt
is
fastened.
3)
Check
that
the
tone
arm
will
not
move
in
either
direction
when
the
UP/DOWN
key
is
depressed
repeatedly.
Fig. 3-6 Arm Servo Adjusting Cam
Sensor Holder
Fastening Bolt
3-4. Tension Adjustment of Tone Arm
Horizontally Driving Wire (See Fig. 3-4)
Move the tone arm by depressing the MANUAL key and adjust the
tension adjusting screw so that the wire does not slip along the driv-
ing gear.
Note: Care must be taken not to fasten the tension adjusting screw
too tightly.
® Variable resistors in the DD motor control circuit
The variable resistors (eVR1, eVR2 and eVR3) in the DD motor
control circuit are used for adjusting wow and flutter. These variable
resistors have already been adjusted accurately before shipped, be-
cause a special measuring instrument is required for adjustment.
Therefore, when the motor is required to be replaced by a new one
because of irreqular rotation, replace the motor assembly and all
(Stock No. 18022201).
4. OTHER PARTS
Parts List <Front View>
Parts No. Stock No.
Description
=
18026401 Tone Arm Ass’y with Cartridge
SV-S303
2 13110600 Stylus, SN-S303
3 13103900 Arm Rest
4 13105000 Control Plate
5 18025401 Push Knob Ass‘y (1)
5-1 Mounting Plate, push knob
5-2 13099700 Push Knob, START/STOP
5-3 13099800 Push Knob, MANUAL, UP/
DOWN, REPEAT
6 13100000 Slide Knob, SPEED,
SENSITIVITY
7 18025501 Push Knob Ass’y (2)
7-1 Mounting Plate, push knob
7-2 13089800 Push Knob, CLEAR, music
selection 1 ~ 7
8 13099900 Push Knob, POWER
8-1 Knob Holder
9 13099210 Turntable Platter
10 13099110 Turntable Sheet
41 13012300 EP Adaptor
12 13112000 Dust Cover Ass’y
13 13113600 Side Hinge (L)
14 13113700 Side Hinge (R)
15 13113800 Hinge Cap
16 13115100 Screw, M2.6 x 8
13097300 Insulator
Note: Parts without Stock Nos. are not supplied even parts
names are listed in the parts list.
Parts List <Top View>
Parts No. Stock No. Description
1 38004700 Power Supply Cord
2 39106000 Strain Relief
3 13062500 Output Cord
4 39105700 Strain Relief
5 46170400 Jack, computer editing
6 13097910 Wire
7 13097400 Pipe (S)
8 13088300 Pulley (B)
9 13106000 Pipe (L)
10 13106200 Pipe Holder
11 18022201 SSD-1 DD Motor Ass‘y with
control circuit board S-0097
12 15005801 Power Transformer
07204700 Slide Switch, voltage selector

ome orem
4-1. Front View a
>
pa
f
‘\
oe
Auto
Moe
Guide
6)
®
8)
Auto Mechanism Ass (II
(See of Exploded View
Auto Mechanism Ass’ y)
Auto Mechanism Ass y(1)
(See of Exploded View
Auto Mechanism Ass y)

P-M7
5. EXPLODED VIEW OF MECHANISM Ass’y & PARTS LIST
5-1. Auto Mechanism Ass’y (I)
Mechanism
Chassis
Parts List <®~@0>
Parts No. Stock No. Description
1 46176300 Micro Motor
2 55029810 Rubber Cushion
3 13103800 Beit (B)
4 00436500 Pan Head Screw, M2 x 4
5 13098100 Shaft Guide (B)
6 13134200 Warm Shaft Ass‘y (B)
7 13122300 Binding Head Deltite Screw,
M3 x 6
8 11602700 Micro Switch
9 13127800 Binding Head Tapping Screw,
M2 x 12
10 13103700 Lifter Cam
1 13098910 Lifter Plate
12 13115200 Slot Type Set Screw,
M3 x 10
13 51825000 Thrust Washer, FT3
14 00489000 E Type Washer, D2
Parts No Stock No. Description
15 13111600 Compression Spring
16 13097800 Sensor Holder
17 Sensor Circuit Board, S-0113
18 00421300 Pan Head Screw M2.6 x 6
19 13111500 Tension Spring (2)
20 51830000 CS-Type Washer, M2
21 00466500 Plane Washer, M4
22 00469700 Spring Washer, M3
23 51626500 Hexagon Head Screw, M3 x 6
24 00466700 Plane Washer, M4
25 00469800 Spring Washer, M4
26 00463800 Hexagon Nut, M4
27 13096810 Position Guide
28 51625100 Pan Head Tapping Screw,
M3 x8
29 13111400 Tension Spring (1)
30 51830000 CS-Type Washer, M2

5-2. Auto Mechanism Ass’y (II)
Parts List <6)~G)> Parts List <@~@>
Parts No. Stock No. Description Parts No. Stock No. Description
51 18026401 Tone Arm Ass’y 101 46176300 Micro Motor
51-1
Cartridge,
SV-303
102
55029810
Rubber
Cushion
51-2 —— Pipe 103 00436500 Pan Head Screw, M2 x 4
51-3 ——= Pipe Holder 104 60322310 Belt (A)
51-4
——=
GND
Rag
105
13098400
Warm
Shaft
Guide
{A)
51-5 — Pan Head Tapping Screw, M2 x4 106 13134100 Warm Shaft Ass’y (A)
51-6
Pan
Head
Screw,
M2
x
4
107
13098500
Drive
Gear
52
18026501
Arm
Shaft
Bearing
Ass’y
108
13098300
Pulley
(B)
52-1
Arm
Shaft
Bearing
109
51822600
Thrust
Washer,
FT4
52-2
==>
Radial
Bearing
110
00489200
E
Type
Washer,
D3
52-3
=
Arm
Bearing
111
00437600
Pan
Head
Screw,
M3
x
20
52-4
eS
Pivot
Bearing
112
13112800
Flanged
Screw,
M3
52-5
Se
Holder
Ring
113
00466700
Plane
Washer,
M4
52-6 Slot Type Set Screw, M2.5 x 2.5
53 13096700 Holder Weight e Abbreviations
54
131141
00
Pivot
1.Pan
Head
Tapping
6.Binding
Head
SEMS:
11.
Hex.
Socker
16.
Retaining
Ring
)
55
00463600
Hexagon
Nut,
M3
ee
eee
pees
JOSE
Tyee
Beereet
ace
Tyee
Prasat:
56
13127200
Hexagon
Socket
Head
Screw,
a
hehe
pa
es
M3
x
10
em
yee
Se
Teme
Sg
emer
ea
57
00469700
Spring
Washer,
M3
q=>
a
re
rom
3.Pan
Head
Seve
"tase
See
tye
ee
Lies
Type
18.
Wave
Washer
Note: Parts without Stock Nos. are not supplied even parts on — © fa © = © i
name are listed in the parts list. 4. Pan tase SEMS A wood Senn "4 Sonn Wane, ig -19 Hexagon Nut -
Screw PSA Type ‘ * FC Type Se H Type Nut
© G2 © baw einem Of
ae Oe Gm
ou © tm
10

6. PARTS LOCATION & PARTS LIST Toms pale lieth nt Getic Meiual inter the
Common Parts List for capacitors & resistors,
6-1.
$-0107
T.A.
Control
Circuit
Board
(stock
No.
13108601)
which
was
appended
previously
to
Sansui
Manual.
Component Side
Cc. 7 8 Do 5]
R73. R74. R75 “VO R76
a ma a
|
|
|
|
|
|
i
|
L
Parts List a oe 7
Parts No. Stock No. Description Parts No. Stock No. Description
fXO1 46149200 Ceramic OSC Element 3.58 MHz fiC9 46173100 NJM2904D
: or 46173200 uPC358C
e@Transistor
fIC10
00
NJM2902N
{Ol 07194801 28C1815 or 07258300 MB3614M
or
03059501
280945
fIC11
07272700
MSM4081RS
or
07299701
2S8C2603
or
46164400
MB84081B
fO2
07194801
28C1815
fIC12
46122900
MSM4538RS
or 03059501 28C945 or 46160800 TC4538BP
or 07299701 2SC2603
fO3 07194701 2SA1015 @Diode
or 07197001 2SA733A fDi ~3 03111600 1$2473D
or 07299601 2SA1115 {D4 ~6 . 03103300 IN60
fO4 07194801 2S8C1815
or 03059501 28C945 Zener Diode
or 07299701 2SC2603 f0Z1 46102600 052Z8.2-Z2
fO10 07263501 2SD600 {DZ2 46102600 0528.2-Z2
or 46149401 28D794
fQ11
07263401
2SB631
{C16
46028100
22uk
25V-
EC.
or 46149301 2SB744 fC22 07214600 O.15pF 25VC.C.
C23 07213600 22000pF 25V C.C
elC
fC24
07213600
22000pF
25V
C.C.
f1Ci
46160200
MB74LS09
C25
07213600
Z22000pF
25V
C.C.
or 46160300 M74LS09 fC28 07213600 22000pF 25V C.C.
fIC2
46160200
MB74LS09
fC29
07213600
22000pF
25V
C.C.
or 46160300 M74LS09 C32 07214600 O.15uF 25V CC.
fIC3 46165200 B8841-566M
fIC4
03611800
SM4049RS
fVR1
10352300
Semi
Variable
Resistor
470k
9
(B),
or 46160400 MB84049B E Sensor adj.
fIC5
03611800
SM4049RS
fVR2
10352300
Semi
Variable
Resistor
470kQ
(B),
or 46160400 MB84049B F Sensor adj.
fIC
46164300
MB84066B
fVR3
10342700
Semi
Variable
Resistor
10k
(B),
or 07264600 MSM4066RS Fy Sensor adj.
fIC7 46160700 JM4556 fVR4 10343700 Semi Variable Resistor 470k (B),
FIC8 07258300 B3614M E, Sensor adj.
FRLI 46173300 Relay
11

6-2. S-0105 Power Supply Circuit Board (Stock No. 13108401)
Component Side
SANSUI 0105
~ POWER SURLLY ()
6-4
Parts List : Ae ee
Parts No. Stock No. Description
eiC
hic 46160100 M5230L
e@Diode
hD1 03117000 RB-152
hD2 03117000 RB-152
hcl 00386000 1OOO00pF 150V C.C.
hc15 07214000 47000pF 25V C.C.
hSswi 07270400 Push Switch, POWER
® Note: The circuit boards, $-0097, S-0108, S-0106, S-0111, S-0112 & $-0113 are not supplied
as the assembled. However, individual parts on the circuit board are provided by orders. 6-5.
6-3. S-0097 DD Motor Control Circuit Board
Component Side
dey 16 a1
ee
te eS
Sh Z
PartsList oes
Parts No. Stock No. "Description
@Hali IC
46172600 HA-200A with Board
Transistor
eQ1 46149401 28D794
eQ2 46149401 2SD 794
e003 46149301 2SB744
e004 46149301 2S8B 744
eiC
elCl 46146400 TC9142P
elC2 46147700 M5218L
or 46087100 NJM4558S
or 46146500 BA715
elC3 46147700 M5218L
or 46087100 NJM4558S
or 46146500 BA715
exOl 46159700 Quartz Element 5.5296 MHz
@Diode 6-6.
eD1 03111600 1$2473D
e@Zener Diode
eDZ1 46 104300 05215-Y¥
eDZ2 46104300 O5Z1b-Y
eDZ3 03166300 RD5.1E
ecl 07213600 22000pF 25V C.C.
eC? 07211300 1000pF 25V C.C.
eCd 07214000 47000pF 25V C.C.
eCl4 00305800 22pe 25. EC.
eC15 00305800 22uF 25V EC.
eVR1 07241100 Semi Variable Resistor 2kQ (B)
eVR2 07241100 Semi Variable Resistor 2kQ (B)
eVR3 07241000 Semi Variable Resistor 1kQ (B)
§-0108 Control Circuit & Indicator Circuit Board
Component Side
| SANSUI
0108 | -
INDICATOR(S)
| CONTROL
Description
Parts List = a
Parts No. Stock No. Description Parts No. Stock No.
gLD1~ 8 46162500 Light Emitting Diode gSW8 11320900
SLR-54URC (Red) gSw9 11320900
gLD9 46189700 Light Emitting Diode gSW10 11320900
SLR-54PC5 (Green) gSW11 11320900
gLD10 46162500 Light Emitting Diode gsW12 11320900
SLR-54URC (Red) gSW13 11320900
gSW1 ~ 7 11320900 Push Switch (Tact), RANDOM fS1 07249800
ACCESS PROGRAM 1 ~ 7 fS2 07249900
Push Switch (Tact), CLEAR
Push Switch (Tact), REPEAT
Push Switch (Tact), UP/DOWN
Push Switch (Tact), MANUAL
Push Switch (Tact), MANUAL
Push Switch (Tact),
START/STOP
Slide Switch, SENSITIVITY
Slide Switch, SPEED
S-0106 Power Supply
Component Side
~ SANSUI
Circuit Board 6-7.
S-0112 A, B, C Sensor Photo TR Circuit Board
Component Side
SANSUI S-O112 |
Parts List ee
Parts List oo Parts No. Stock No. Description
Parts No. Stock No. Description
— . @Transistor
eTransistor f05~7 46169200 Photo Transis
hol 46149401 28D 794 Ea ae RGR eOvEU ae!
or 07263501 2SD600
hO2 46149301 2SB744 .
or 07263401 288631 6-8. S-0113 Arm Servo Sensor Circuit Board
Component Side
@iC ae a
hIC2 07183500 uPC78MO5H SANSU!
S$:0113 |
hC2 07214000 A7O000pF 25V CC. 8° Qo
hC3 07214000 47000pr 25V. .C.C: ———7
S-0111 A, B, C Sensor LED Circuit Board
Description
Photo Coupler PS4010
Component
Side
Parts
List
@
+15
7
Es
Fp2
tpi
PartsNo.
Stock
No.
.
:
e@Transistor
'
08,9
46194301
ry
+18
Z-0026_
:
HJEED
SANSUI
SOIT
=
=
a
2
Parts
List
Parts
No.
Stock
No.
Description
oe:
c
®
Abbreviations
——-—
=
:
a.
:
|
:
tet
fLD1
~
3
46782000
Light
Emitting
Diode
|
|
Caren
Resster
:
|
SR...
Solid
Resistor
LN25RCP
(Red)
|
Ce.R..
|
Cement
Resistor
—
|
MLR...
Metal
Film
Resistor
|
F.R.
.
.
Fusing
Resistor
|
NER.
|
Non-inflammable
Resistor
|
CC...
Ceramic
Capacitor
|
©€.T.)..
Ceramic
Capacitor,
Temperature
i
Compensation
(
E.C.
. .
Electrolytic
Capacitor
E.k. ... Low Leak Electrolytic Capacito
E.B. 0) Bi-Polar Electrolytic Capacitor }
E.BL. Low Leak Bi-Polar Electrolytic |
Capacitor H
Tac. Tantaium Capacitor
FAC. Film Capacitor
M.P.. . Metalized Paper Capacitor |
PC. . Polystyrene Capacitor {
Gil. Gimmic Capacitor |
i

7. SCHEMATIC DIAGRAM
$-0108 TA. CONTROL (f)
P-M7 P-M7
een
PN
cr
ae
ee Ue
et
aac
ee
eel
* Design and specifications subject to change without notice for improvement.
*La présention et les spécifications sont susceptibles d’étre modiflées sans préavis par suites d’améliorations éventuelles.
* Anderungen, die dem technischen Fortschritt dienen, bleiben vorbehalten.
2 MO. CONTROL (e)
Od
il
= g
ors} _Yiwvel
"
t
2 Coe}
. 910
Ra
z op
| pon
H 4
6 Cn
glD
REPEAT Ott
CPU 4 Cy
©)
a
{22 | ee
QUARTZ
LOCKED
ee
rth
FR2g 470K
C23 0.022
#C2q 22/25
13
QUARTZ LOCKED Ind.
eVR, eRi7
2K(B) 22K
33% /45rpm
OUTPUT START /STOP.
@Ry 22K
eQ;
il ww EP
jC §
2
s
1
‘ eC2 0.00],
Rp 3.3M lehe22K eR -15V
10/50
Pe
es
ay
ps
0422/25)!
al oe > ge eRia I2K eRe 02K] eoa 68K GP)
= eR, 4 Ss
S14 700K els0047
im
,
~15V
:
90 Pulse elle ‘
ie rp.m.:50Hz 8
~p.m.: 67. 5H: S 3
45
rpm
fz
ZS
a
a
ys x] ek
2 1
s $s eQ2
a ae
' aN 2
ap, |e S TO, !
€Q,2 2SD794(P,Q) Ps jIC2 x Yv
<3, 2SB744(P,Q) af & CK)
eIC, TC9I42P wR s ede
elCz,3 BA7IS, NJIM4558,M5218L ogres
ed,
1$2473D
hie
20K
Rog
5K
02,2 OSZIS-Y oy ee onee ee
1
epz;_
RDS.IE
gs
1
sy
SSD-I
RIX] err arc
'
2 Ty
AQ,
AlC2
E|
be — - —— -
C7 47/25
2a, 2SD6O0(E,F)
2$0794(Q,P)
g hGe 2SB631(E,F)
Qa 2S8744(Q,P)
$ nIC, M5230L
H
=
AICe
pPC7BMOSH
Rear ae nO,2 RBIS2
oa
-avv|_|e[+2v
-—— -— 1343 k ioe
$-0107
F;24 2SCI8I5(Y,GR),26C945(Q,P,K), 2SC26031E,F)
fa,” 2SA1015(Y,GR), 25A733A(,P), 2SA1115(E,F) POWER SUPPLY (h)
fa 28D794(0,P),2S0600(E,F)
tan 28B744(,P),2SB631(E,F)
2SA1015 2SB631
2SA733A 2SB744
28C945 2SD600
28C1815 2SD794
ECB
2SA1115 — a5c2603
ecB i
HPCTBMOS rcmass6D
NJM2904D
8;
fs
1} y
MSM4066RS
MSM4081 RS
1
*Sasgd oy
MSM4049RS
MSM4538RS
*3456¢ 0
MB3614M
NJM2902N
f
MB8841-566M
42
i < y 22
123
MB84049B
TC4538BP
of{
rc
TC9142P 78
6
2a
8
MB84066B
MB84081B
MB74I Lsog
01,23 \S2473D SYMBOL RESISTERS
04,56 1N-60 4 Ceramic Are in ohms, 4 Watts, 5% Tolerance SYMBOL OF FUNCTION RB152
$0,
OSZB.2Z
©
Mylar
Unless
Otherwise
Noted,
K:k2,M:m2
(e)
MO.
CONTROL
fF
> MB74LS09 8 Styrol (f) T.A. CONTROL
fICy2 © Tantalum Electrolytic CAPACITORS a ede Boy NJM4558S
FIC; MB8841-566M cf
3 @ Aluminum Electrolytic Are in uf, Unless Otherwise Noted.PipF (g) INDICATOR
fIC4,5
MSM4049RS,MB84049B
@
Low-Leak
Electrolytic
(h)
POWER
SUPLLY
fICe MB84066B,MSM4066RS (BP) Bi-Polar Electrolytic TOLERANCE
FIC; NJM4556 (PP) Polypropylene Film Jit5%, Gi4£2%, F:t1% ;
#1Cp,9 NJIM2902N,MB84081B © folycarbonate Film a4
fICs MJM29040, yPC358C (L.8) Low-Leak Bi-Polar Electrolytic Each D.C. Voltage measured by the PS.4010 05215-Y 56
fIC,, MB8408IRS,MB840818 @ Fusing Resistor instruments discribed below shows : 0828 2-7 Tay
FIC. MSM4538RS TC4538BP © Non-Inflammable Resistor the nominal value in volts at 33/4rpm. RDS 1E 1N6OP
S
Ol
"I
°
@
Metal
Film
Resistor
Measuring
instruments
i
182473D
O Cement Resistor Volt Meter
FLD ;~3 LN25RCP @ Non -Inductive Cement Resistor Osciloscope
s-Oll2 Electrolytic Capacitor
fQs.0 PNISO : Capacitance (uF) Noit (V) Wy ; ‘
3
S-O113 '
fas PS4010-L 4 q
2

8. MAIN PARTS REPLACEMENT
8-1. Replacement of Tone Arm Horizontally Driv-
ing Wire (See Fig. 3-4 on Page 6, Top View on Page 8)
1) Remove the cabinet. (See How to remove the cabinet on Page 7)
2) Remove the mecha guide.
3) Loosen the tension adjusting screw.
4) Remove the pully (B).
5) Take off the screw @) fixing the driving wire under the mecha-
nism chassis.
8-2. Replacement of Arm Bearing Ass’y 62)
(See of Exploded View of Mechanism Ass’y on Page 9, 10)
1) Perform items 1), 2), 3) ‘8-1. Replacement of Tone Arm Hori-
zontally Driving Wire” first.
2) Loosen the hexagon socket head screw to remove the tone
arm ass’y GD.
3) Loosen the nut @) , the pivot to remove the arm holder
weight 63).
4) Loosen the nut @6) to remove the arm bearing ass’y.
8-3. Replacement of Lifter Cam (1)
(See Exploded View of Mechanism Ass’y on Page 9, 10)
1) Perform items 1), 2), 3) “8-1. Replacement of Tone Arm Hori-
zontally Driving Wire” first.
2) Perform items 2), 3) 8-2. Replacement of Lifter Cam”
3) Remove the arm holder weight 63). :
4) Remove the E-type washer (4 , plane washer @ , spring G5.
5) Remove the lifter plate (i).
6) The lifter cam can be taken out.
8-4. Note on Parts Replacement
1) When replacing a parts of the mechanism ass’y, remove the
stylus.
2) When replacing the worm shaft ass’y (B)(@), remove the worm
shaft guide G), the screw.
3) Refear to Fig. 8-1, when wiring from cartridge (tone arm ass’y
6D).
4) When replacing a parts of the mechanism ass’y, make proper
wirings referring to the top view on page 8 and Fig. 3-4 on page
6.
5) Perform adjustment 3-1, 3-2 and 3-3, when replacing a parts of
the mechanism ass’y.
Fig. 8-1. S-0116 Circuit Board for connections between P.U. Out-
put cord & color wires from cartridge, E sensor and F sen-
sor.
P.U. Output Cord
Color-wires
from
Curtridge,
E, F Sensor
P-M7
9. PACKING LIST
PartsNo. Stock No. Description
1 Corrugated Board
2 91165200 Polyethylene Bag
3 13099110 Turntable Sheet
4 13112000 Dust Cover
5 Styrofoam. Spacer
6 ———s Special Tapping Screw
7 Tag Washer
8 13012300 EP Adaptor
9 Binder
10 Tag Washer
11 00428700 Binding Head Screw, M4 x 14
12 Turntable Unit
13 91122710 Polyethylene Bag
14 13108200 Inner Packing (Right)
15 13108300 Inner Packing (Left)
16 13102800 Carton Case
Note: Parts without Stock Nos. are not supplied even parts
name are listed in the parts list.
10. ACCESSORY LIST
Stock No. Description
46142800 Operating Instruction
14