Technics SL-BD22D User manual

ORDER NO. AD9507191C2
Service
Manual
FSG
servo
Automtic
Turntable
System
is the standard mark for plug-in-connector system, Products
Automatic
Turntable
System
[™P
—
SL-BD22D
Colour
(K)--++ Black Type
Area
Suffix for
Area Colour
Model No.
(E) Eurpoe.
(EB)
Geart
Britain.
(K)
(EG) Germany and Italy.
Carrying this mark are interchangeable and compatible with each other
SPECIFICATIONS
@ TURNTABLE SECTION
Automatic turntable
Auto-return
Auto-stop
Drive method: Belt drive
Motor: OC motor
Drive control method: FG servo control
Turntable
platter:
Aluminum
die-cast
Diameter 312mm
Turntable speeds: 33-1/3 rimin and 45 r/min
Wow
and
flutter:
0.045%
WRMS
(JIS
C5521)
+0.06% Weight zero to peak
(IEC
98A
weighted)
Rumble:
—70
dB
DIN-B
(IEC
98A
weighted)
@ TONEARM SECTION
Type: Static-balanced straight tonearm
Plug-in-connector
cartridge
system
Overhang: 15mm
Effective length: 230 mm
Tracking error angle: Within 2°32’ at outer groove of
30 cm disc
Within 0°32" at inner groove of
30 cm disc
Applicable cartridge
weight: 69
@ CARTRIDGE SECTION
Type: Moving magnet stereo cartridge
Frequer~,; response: 20 Hz ~ 20 kHz
Output
voltage:
2.5
mV
at
1
kHz,
5
cm/s.
zero
to
peak lateral
velocity
Channel
separation:
22
dB
at
1
kHz
Channel
balance:
Within
2 dB at 1 kHz
Recommended
load
impedance:
47
kQ~
100
kQ
Compliance (dynamic): 8 x 10° *cm/dyne at 100 Hz
Stylus pressure range: 1.25+0.25g
Weight:
6 g
(cartridge
only)
Replacement
stylus:
EPS-34CS
@ GENERAL
Power supply: For (EB) area’
AC 230V ~ 240V, 50/60 Hz
For (E, EG) area:
AC 230V, 50/60 Hz
w
Power consumption: 3
Dimensions:
(WxHxD) 430x93X375 mm
Maximum height when dust
cover is open
430360410 mm
Weight: 3.6 kg (7.9 Ib.)
Specifications are subject to change without notice.
Weight and dimensions are approximate.
AX\WARNING
This
service
information
is
designed
for
experienced
repair
technicians
only
and
is
not
designed
for
use
by
the
general
public.
It
does
not
contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products
powered
by
electricity
should
be
serviced
or
repaired
only
by
experienced
professional
technicians.
Any
altempt
to
service
or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death
Technics

@
CONTENTS
SAFETY PRECAUTION ----
LOCATION OF CONTROLS
DISASSEMBLY INSTRUCTIONS --
MEASUREMENTS AND ADJUSTMENTS
TROUBLESHOOTING --
BLOCK DIAGRAM
CIRCUIT BOARD AND WIRING
CONNECTION DIAGRAM
EXPLODED VIEW
REPLACEMENT PARTS LIST
SCHEMATIC
DIAGRAM
“10
PACKING
-
@
SAFETY
PRECAUTION
_
cthis
‘safety
precaution”
is
applied
only
in
U.S.A.)
1,
Before
servicing,
unplug
the
power
cord
to
prevent
an
electric
shock.
2. When replacing parts, use only manufacturer's recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5.
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.
e@ INSULATION RESISTANCE TEST
1.
Unplug
the
power
cord
and
short
the
two
prongs
of
the
plug
with
a
jumper
wire.
2. 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
5.2MQ.
to
all
exposed
parts.
(Fig.
A)
Equipment
without
antenna
terminals
should
read
approximately
infinity
to
all exposed
parts. (Fig. 8)
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
Onmmeter
(Fig. A) (Fig. B)
Resistance
=
3MQ—5.2MQ
Resistance
=
Approx
oo
4.
If
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
ll ACCESSORIES
Note: Configuration of AC power supply cord differs according to area.
45-rpm adaptor (1)
Turntable mat (1) AC power supply cord (1) Stereo connection cable (1) Ground wire (1)
(SFWE212-01)
(SFTGB93M02EM)
yaorss
(E,
EG)
(SFDHBD2N01)
(SJPB7M)

LOCATION
OF
CONTROLS
45-rpm adaptor
Turntable mat
Strobe lines
pilot lamp
Pitch control
(PITCH ADJ)
This
unit's
strobe
illuminator
operates
at
the
AC
line
frequency
which
generally
has
a
0.2%
fluctuation.
This
fluctuation,
when
present,
may
make
the
strobe
pattern
appear
to
change.
However,
actual
platter
speed
does
not
change,
because
the
DC
motor
is
notaffected
by
AC
power
line
frequency.
Notes:
*Do not try to clean the dust cover
while a disc is playing, because
static electricity might cause the
tonearm to rise.
{cin
Tonearm
©The
unit
is
in
the
standby
condition
when the AC power supply cord is
Arm rest connected.
The primary circuit is always “live” as
long as the power cord is connected
Set
to”
2"
to
stop
to
an
electrical
outlet.
the play temporarily.
Set to“ Z" to resume
the play.
Stop switch (STOP)
Press to stop the play.
Strobe-illuminator/
(CUEING)
3 Cueing control
Setto“Z”,
2
Speed
selector
(SPEED)
Set to disc’s speed.
1 Place a disc on the turntable mat.
@ Fora 17-cm (7”) (large center hole) disc
Remove the
stylus protector.
(The
tape
on
side
of
cartridge
prevents
the
stylus
assembly
from
shaking
loose
during
shipment.)
Move to the desired position.
(The strobe-illuminator/pilot lamp will light and the
platter will start turning.)
Cartridge
(TaD) is the standard mark for the “P-mount” plug-in
connector system. Products carrying this mark are inter-
changeable and compatible with each other.
Setto"z”.
(Play will start.)
@ When play ends
1. The tonearm will automatically return to the arm rest (the
automatic
return
feature).
2.
Rotation
will
stop.
[ After use
Attach the stylus protector.
Protector

@
DISASSEMBLY
INSTRUCTIONS
How to remove the cartridge
Ref. No
3 How to remove the turntable platter
Procedure
1
1. Remove the setscrew @.
2. Pull out the cartridge, taking care that
your hand does not touch the stylus
tip.
Procedure
3
1. Open the dust cover and remove the
turntable mat.
2. Remove the belt.
3. Lift up the turntable platter.
Dust cover
Turntable
Soft cloth
f
f.
Be ane How to remove the stylus
Turntable
Platter
Procedure | «putt out the stylus, taking care not to
2 touch the stylus tip
Cartridge Ly
SY
; a
— Stylus
Ret.
Ref.
No
oe How to remove the bottom board 7 5 How to remove the cueing knob
Procedure | 4 Turn over the unit on a soft cloth. Procedure |. Remove the setscrew@.
304 2. Remove the 5 setscrews (@ ~ @) 3e4aes
fl
<2 Z 2
Bracket “~ if
Cueing knob E S

Ref.
No
P
Ref.
No
A
“6
|
Howto
remove
the
stop
switch
knob
ae
How
to
remove
the
drive
P.C.B.
Precseure
1.
Remove
the
setscrew
@
Fi
gata
1.
Remove
the
3
setscrews
(@~
@).
2.
Remove
the
base
(with
knob)
in
the
ae
2.
Remove
the
drive
P.C.B.
in
the
direction
of
the
arrows
(@,
®).
direction
of
the
arrow.
3. Release
the
2 claws.
eo
Note:
When
attaching
the
stop
knob,
do
not
forget
to
attach
the
spring
Ref.
No
8
How
to
remove
the
mechanism
plate
Procedure
Shield
plate
30408
f?
1, Remove the 6 setscrews
(0~0).
2. Lift up the mechanism a]
plate.
FF
Mechanism
plate
|
c
6)
\
i
i
H
j
LK
Ret.
No
A
9
How
to
remove
the
tonearm
and
PU
fixing
plate
Procedure
3949809
1s
2.
3.
Unsolder
the
5
PU
lead
wires
from
the
phono
terminal
Remove the setscrew @ and spring.
To
remove
the
tonearm,
remove
the
2
setscrews
(0.0).
.
TO
remove
the
PU
fixing
plate,
remove
the
3
setscrews (Q, @. @).
PU
lead
wiring
method
White
Blue.
Red
Green
Black...
.L channel (+) terminal
.L channel (—) terminal
-R channel (+) terminal
.R channel (—) terminal
. Ground terminal
PU
fixing
plate

Ref. No
10
How to remove the cueing cam
Note:
If
the
cueing
time
of
the
tonearm
becomes
too
short,
or
Procedure
39408010
1. Push the pin with a driver.
2. Remove the pin and spring.
3. Remove the cueing cam.
if
the
cueing
cam
is
replaced,
apply
silicon
oil
(Part
No.
$ZZOL11)
according
to
the
following
procedure.
1. Remove the cueing cam.
2.
Apply
silicon
oil
to
the
cueing
cam
and
oil
tank.
Pin
Cueing
cam
—_—c=
SS
Apply silicon oil
element
How to remove the magnetic resistor
Note:
If the magnetic resistor element has been
Procedure
304011
Remove
the
motor
assembly
in
the
direction
of
the
arrow.
Mi CONNECTIONS
replaced, observe the following mounting
precaution.
The magnetic resistor element is supplied with
the center lead bent. Be sure the seat the bent
lead flush to the P.C.B.
This will ensure the proper clearance
(0.8+0.2
mm)
between
the
magnet
and
the
magnetic
resistor
element
as
shown
1, Unsolder the 3 lead
wires from the
magnetic resistor
P.C.B.
2. Release the claw and
pull out the P.C.B.
3. Unsolder the 3
terminals of the
magnetic
resistor
below.
+0
element.
Magnetic
6194
mm
Pull
out
resistor
\
0.840.2
mm
ry
element
Magnet
|
1.5mm
Holder
wel
t
Holder
PCB.
AC
power
supply
cord
(included)
To
household
AC
outlet
or AC outlet on amplifier
a)
—Os
2
t
GND
PHONO
4
@
o-000
ord
l
'
@!000
(PNL)IGND)
=
ar
tt
Ground
wire
(included)
foba
Amplifier
If the ground w
a “hum” ni
S NOt Connected.
@ may be heard
Stereo
connection
cable
(included)

m@
MEASUREMENTS
AND
ADJUSTMENTS
ARM-LIFT HEIGHT ADJUSTMENT
The arm-lift height (distance between the stylus tip and the 5 mm ~ 7 mm (3/16" ~ 9/32")
record surface when the cueing control is at the "2"
position) has been adjusted at the factory to approximately
5 to 7 mm (3/16"—9/32").
If the clearance is too narrow or too wide, turn the
adjustment screw clockwise or counterclockwise.
Clockwise rotation
—distance between the record and stylus tip is decreased.
Counterclockwise rotation
—distance between the record and stylus tip is increased.
Adjustment
AUTOMATIC
RETURN
ADJUSTMENT
1. Clamp the tonearm to the arm rest
2. Remove the rubber cap.
3.
Turn
the
screw
with
a
screwdriver,
clockwise
or
counter-
clockwise
as necessary.
If
the
tonearm
tends
to
return
to
the
arm
rest
before
the
play
has finished,
—turn counterclockwise.
If
the
tonearm
fails
to
return
after
the
final
groove,
—turn clockwise.
Auto-return, \
adjustment screw
SPEED
ADJUSTMENT
(PITCH
CONTROL)
There
are
strobe-lines
cut
on
this
turntable
platter
to
indicate
correct
rotational
speed
45rpm
If
the
strobe-line
appears
to
be
moving
as
the
turntable
33-1/3rpm
SoH
rotates,
adjust
while
playing
a
record.
45rpm
60Hz
1, Set the speed
selector
to the speed
to be adjusted
33-1/3¢pm
2.
Push
the
power
switch.
The
strobe-illuminator/pilot
lamp
will
light
up
and
the
platter
will
rotate.
3.
Watch
the
dot
pattern
on
the
side
of
the
platter.
Turn
the
pitch
control
one
way
or
the
other
until
the
dots
appear
to
stand
still.
This
is
the
correct
speed
4.
Turning
the
pitch
control
in
the
“+”
direction
increases
the
speed.
5.
Turning
the
pitch
control
in
the
“—"
direction
decreases
the
speed.
The strobe-line
for 60 Hz. 33-1/3 rpm
seems to be stationary
ROTATING SPEED
When the turntable drive/control IC (IC 101) or the variable
resistors (VR101, 102) are changed, or if the rated rotation
is not reached even when the pitch control knob is turned,
adjust the rotating speed in the following procedure.
1, Set the speed selector switch to the “45” position.
2. Turn VR101 with a screwdriver from the bottom of the
set to the rated rotation (45 rpm) and check the rotation
with a strobe while adjusting the speed.
Set the speed selector switch to the “33” position.
4. Turn VR102 with a screwdriver from the bottom of
the set to the rated rotation (33-1/3 rpm) and check the
rotation with a strobe while adjusting the speed. VR102
e
Note:
Be
sure
to
make
the
adjustment
for
45
rpm
first.
VR101
(33-1/3
rpm),
(45 rpm)

@ TROUBLESHOOTING
No sound
‘comes out.
Check the resistance at output pin plug (left and right
channels).
Strobe LED
does not
indicate.
Turntable does
not rotate.
4
O~ a few ohms || Check if shorted circuit at pin plug or lug terminal or
connector or cartridge.
22 (open)
Check if opened circuit at pin plug or lug terminal or
connector or cartridge
Check if sequently connected to amplifier or check
amplifier.
Strobe LED drive circuit
Wavetorm
of
collector
of
Q201
Lis
8.2ms
-
Connect
the
AC
power
plug
to
AC
power
plug
is
connected
ah
AC
wall
achat,
ae
ee
ee
ese
i
-—
Belt
is
set
over
the
turntable
capstan?
Set
the
belt
correctly.
Q201,
202
(Drive
transistor)
0201~0207
R201~R205
defective
——_—_—_—<__—_—_
T1 (Power
transformer)
$1 (Power switch)
01~D4
(Rectifier
}defective
diode)
IC1 (Regulator IC)
1C101 (Drive IC)
Power source circuit
1. AC 14V between FC2 terminals © and ©.
2. OC voltage of regulator IC (IC1)
@12v @6v @ov
3. OC voltage at terminal @ of 1C101 (3V).
Ss
Drive
circuit
1€101
(Drive
IC)
*DC
voltage
of
drive
transistor
(0101)
0101
(Drive
Base
|
Collector
|
Emitter
|
transistor)
defective
33
rom
1.5V
1
6.3V
i
Motor
45
rpm
|
1.6V
5.2V
R108,109
(Resistor)

Unstable
rotation
Turntable
rotates too fast
or does not
rotate.
FG amplifier circuit
1, Waveform of terminal
@ of CN101
wo
Z601 (Magnetic
resistor
element)
1€101 (Control IC)
R101~R103
C101~C103
Motor
2. Waveform of terminal
@
of
IC101
J av
1.4V
33 rpm 3.3ms
45 rpm 2.5ms
33pm 3.3ms
45 rpm —-2.5ms
a eas
Control circuit
1. Waveform of terminal
@® of 10101
FUP
33 rpm 3.3ms
45 rpm_—_2.5ms,
2. Waveform of terminal
@ of 1C101
AV be
33 rpm 3.3ms
45pm .2.5ms
1,
Waveform
of
terminal
of
CN101
3+0.8V
At=S% more than
(0.17ms) 120mV
t
Refer
to
precaution
on
page
5.
3.3ms
©
Terminal
guide
of
IC's,
transistors
and
diodes
SVIBA6301
y
AN78L06 SVDBRSSO5SA
SVDBRS505SB
&
V
input
Ne | fw.
2801423
2SA1309
ee
Uf,
SVD1SR35200V 2801383
SVD1SS254
c
or :
Caution!
IC and LS! are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
® Cover the parts boxes made of plastics with aluminum foil.
® Ground the soldering iron.
© Put a conductive mat on the work table.
* Do not touch the legs of IC or LSI with the fingers directly.
—g9-—
+}
'C101
(Control
IC)
defective
If the reading is =, then Z601
If the reading is 1.3kQ, then
1.
Conduction
check
of
CN101
terminal
of
@
and
©.
©
detective.
and
©.
motor
defective.

SCHEMATIC
DIAGRAM
1
2
3
4
5
For (EB) area:
‘AC 230V ~ 240V, 50/60 Hz
For (E, EG) area:
‘AC 230V, 50/60 Hz
art
Sos
1oDoe
CBee
COIS
Gan
A
f
.
4
sw!
7
PH
BA
QA
fo
ASram 23m6 Ritererne!
sna hen tone eon saosin 238
Notes:
Note:
1.
St
Power
switch
in
“on”
position.
Note
1
2.
$101:
Speed
selector
switch
in
“33”
position.
3.
The
values
are
of
the
reference
voltage
for
the
turntable
rotation
(33
rpm)
of
D
this
unit,
measured
by
a
DC
voltmeter
(high
impedance)
on
the
basis
of
(E.
EG)
(€8]
chassis.
So,
some
error
might
be
included
depending
on
the
internal
impedance
of
the
measuring
instrument
and
the
unit
measured.
281383
28D1423
“(
);
voltage
in
45
rpm.
Note
2
4,
Important
safety
notice:
Components
identified
by
A\
mark
have
special
characteristics
important
for
safety.
When
replacing
any
of
these
components,
use
only
manufacturer's specified parts. R204 | ERDS2TJ332 (3.3K) | ERDS2TJ562 (5.6K)
5.
VR101
is
the
45
rpm
speed
adjustment
variable
resistor.
6,
VR102
is
the
33-1/3
rpm
speed
adjustment
variable
resistor.
7.
This
schematic
diagram
may
be
modified
at
any
time
with
the
development
of
new
technology.
E
F
OUTPUT
@
The
supply
part
number
is
described
alone
in
the
replacement
parts.
aeK
Production
Part
No.
~
Supply
Part
No.
:
Green
|
Q101
(E.
EG)
2S8C1383
2SC01383-QRS
'
1
ex
Q101
(EB)
2801423
2SD1423QRS,
:
(+)
‘
ane
|
Q201,
202
2SA1309
2SA1309A-R
f
ue
i
me
T
Di-~4
SVD1SR35200V
SVD1SR35200A
FI
Oa
a
$
Black
0)
GND
D201,
202
SVD1SR35200V
SVD1SR35200A
D203
SVD1SS254
1SS254TA
D206,
207
SVD1SS254
1SS254TA