Technics SL-PJ37A User manual

ORDER NO. MB9004007C2
i =
Compact Disc Player
COMPACT DIGIT/IL_ p y
OE
SL-PJ37A
Color
(K)... Black Type
Area
& SPECIFICATIONS
@ Audio @ General
No.
of
channels
2
(left
and
right,
stereo)
Power
supply
For Great Britain: AC 50/60 Hz, 240V
For others: AC 50/60 Hz, 220V
Power consumption 10 W
watines
780
nm
Dimensions
(WxHXD)
360x96x283
mm
Weight 3.6 kg
Specifications subject to change without notice.
Weight and dimensions shown are approximate.
& CONTENTS
Page Page
PCACEMENT
sc
icwoted
aie
ons
ar
he
aca
kG
Asan
eee
2
TERMINAL
GUIDE
OF
IC’S,
:
CLEANING
OF
LENS...................00000-
2
TRANSISTORS
&
DIODES
...........,....0000.4
26
ACCESSORIES.
20.
cc
ew
ete
ee
2
PRINTED
CIRCUIT
BOARDS
.................
27
~
30
PRECAUTION
OF
LASER
DIODE
................,
3
WIRING
CONNECTION
DIAGRAM
..............:.
31
©
LOCATION
OF
CONTROLS.................2.05
4,5
REPLACEMENT
PARTSLIST................
32
~
36
CONNECTIONS
...........0.0......0
00000
be
eee
6
EXPLODED
VIEWS-
2.05
aren
See
ess
Save
aca
ha
ba
ae
35
~
37
DISASSEMBLY
INSTRUCTIONS
...............
7~10
RESISTORS
&
CAPACITORS
..............
0000.
38,
39
MEASUREMENTS
AND
ADJUSTMENTS
..........
11,12
TROUBLESHOOTING
GUIDE............
2.0002
eee
40~
42
TERMINAL
FUNCTIONS
OF
iC’S
.............
13
~
16
PACKING
ocd.
ged
cre
ttad
alte
oot
oh
adel
Rerches
daeatd
whe
edie
43
INTERNAL
CONNECTION
OF
FL
.................
17
*
TECHCNICAL
INFORMATION
B
POE
DIAGIONE
oie
each
rind
x
ate
daa
Uae
SIRS
1x1?
*This
technical
information
is
located
on
49
~
56
of
th
SCHEMATIC
DIAGRAM
....................
20
~
26
PP
Poets
SL-PJ46A Service Manual (Order No. AD8902036C2).
Therefore, refer to that Service Manuai.
Matsushita
Electric
Industrial
Co.,
Ltd.
Central
P.O.
Box
288,
Osaka
530-91,
Japan

BE PLACEMENT
Before placement
Two transport security devices are secured to prevent the optical
pickup from damage during transport.
Be sure to release them before use.
RELEASED
Insert them here after removing.
Turn clockwise by 90° to secure
them.
Soft cloth or similar material (to
prevent scratches)
Note:
When transporting the unit, be sure to remove the compact disc
from inside the unit. And replace the transport security devices
again following the reverse order not to damage the optical pickup.
& CLEANING OF LENS
If the lens is stained causing sound skip or operation failure,
open the top cover by pressing the open button, and clean
the lens.
e To remove dust or dirt
Blow the lens with the biower provided in the cleaning kit
to remove dust or dirt.
Dust or dirt
Fingerprint
« To remove fingerprint
lf the blower is not enough, moisten the cotton rod
with the lens cleaner solution and wipe the lens with it
from center of the lens to outside.
& ACCESSORIES
@ AC power supply cord........ 1
SFDACO5E03 (E, EG)
SJA188 (EB)
@ L-type cable...............0. 2
(SJP2257T)
Notes of placement
& This unit is a precision instrument. Be sure to place it ona
flat surface.
B Avoid places such as the following:
Near any equipment or device that generates strong magnetism.
®On any heat-generating equipment or device, or in any place
where the temperature is high (35°C or higher).
*Extremely cold places (5°C or below).
eNear a tuner or TV (it may cause noise in the broadcast, or
disturbance of the TV picture.)
@ When carrying or storing the unit, handle it with care so itis
not subjected to any strong bumps.
Always remove the disc before storing the unit for any period of
time.
@ To avoid problems due to vibration.
eDo not place a book or similar object under this unit.
Do not route the connection cables (of this or other units) across
the operation panel, across the top, or under the unit.
Cautions:
© Do not directly apply the cleaner solution to the lens.
Do not apply too much solution to the cotton rod or
otherwise the solution will flow into the player.
Wipe the lens carefully. Do not give too much stress to
the lens or otherwise it may scratch the lens or cause
optical pickup trouble.
If the solution should be too much applied, wipe the
lens with a dry cotton rod.
Lens cleaning kit (Part No. : SZZP1038C)
® Optical-fiber cable ......... 1
(SUPD 16)

sf PRECAUTION OF LASER DIODE
CAUTION: This product utilizes a laser diode with the unit turned “on“, invisible laser radiation is emitted from
the pick up lens. :
Wave length: 780 nm
Maximum output radiation power from pick up: 100 wW/VDE
Laser radiation from the pick up lens is safety level, but be sure the followings:
. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.
. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
. Do not look at the focus lens using optical instruments.
. Recommend not to look at pick up lens for a long time.
kon —
ACHTUNG: Dieses Produkt enthalt eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung
von der Lasereinheit abgestrahlt.
Wellenlange: 780 nm
Maximale Strahlungsleistung der Lasereinheit: 100 u.W/VDE
Die Strahlung an der Lasereinheit ist ungefahrlich, wenn folgende Punkte beachtet werden:
. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefahrlich ist.
. Den werksseitig justierten Einstellregler der Lasereinheit nicht verstellen.
. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.
. Nicht Gber langere Zeit in die Fokussierlinse blicken.
BOM +
ADVARSEL:
|
dette
a
apparat
anvendes
laser.
CONTROL
OIG ITAL OU FEI
OPTICAL A
SQWD7 |
BLASER PRODUC
‘sowo?
Obs:
Apparaten innehaller laser
Komponent av héger laserklass
an klass 1.
RQLS0022
ADVARSEL: USYNLIG LASERSTRALING
VED ABNING, NAR SIKKERHEDSAF-
BRYDERE ER UDE AF FUNKTION.
UNDGA UDSATTELSE FOR STRALING.

Control section
@P Power switch (POWER EOFF = ON)
@ Disc holder
3) Repeat button (@> REPEAT)
€@} Skip buttons (<< SKIP >!)
These buttons can be used to skip by track in the forward or
reverse direction.
@ Search buttons (<< SEARCH PP)
These buttons can be used to move rapidly forward or
backward on the disc during play. The search speed is slow
when the button is pressed at first and becomes faster if the
button is pressed and held continuously.
G Numeric buttons (+10, 0, 1~9)
These buttons can be used to select the track numbers and
the recording time.
& Buttons for program function
eProgrammed-play button (PROGRAM)
Pressing this button initiates the programmed play mode.
You can then enter specific tracks using the numeric
buttons.
e Clear button (CLEAR)
Each pressing this button makes one track cleared from the
programmed sequence.
© Buttons for CD edit function (CD EDIT)
© Edit tape length button
(EDIT TAPE LENGTH)
When compact discs are to be recorded to tape, this button
can be used to calculate the number of tracks that can be
recorded on each side of the tape, depending on the length
of the cassette tape used, so that as little tape as possible is
wasted.
®Tape-side select button (TAPE SIDE A/B)
When recording compact discs to tape, this button can be
used to check the number of tracks and amount of tape left
over for side A or B.
© Time mode select button (TIME MODE)
Use this button to select the desired time display mode.
@) Auto cue button (AUTO CUE)
Pressing this button causes the unit to skip automatically to
the beginning of the next track on the disc and switch to the
play standby mode.
® Play button ( [>> PLAY)
@® Pause button (If PAUSE)
® Stop button (K STOP)
This button can be used to stop the disc play, as well as to
cancel the various play modes.
@® Disc holder open/close button
(4 OPEN/CLOSE) —

It t_lacue
TRACK NO. INDEX MIN sEC @D-—
Indicators section
15) Programmed-play indicator ( ) & “Over” mark (5>)
This indicator lights if the total number of tracks on the disc is
© Track number display (TRACK) 17 or more.
® Auto cue indicator (A. CUE) @) Track number indicator (1-6)
® index/program number display (NO./INDEX) € Tape side indicator (A/B)
® Time display (MIN/SEC) @ Compact disc edit indicator (EDIT)
@ Pause indicator (E1)
& Play indicator ((>>)
€) Repeut indicator (@>)
if this unit is connected with Technics Hi-Fi component
system whose remote control transmitter has [> /4§] button
for compact disc operation, the pause function may not be
activated by pressing the[>/at] button during compact disc
play.

CONNECTIONS
Notes:
Turn power off on all components before making connections.
@See the operating instructions of the tuner for details.
To the ‘DIGITAL INPUT”
terminal of the amplifier
[1] Optical-fiber cable (inctuded)
This cable can be used only with an amplifier having the
“DIGITAL INPUT” terminal. A dust-protection cap is inserted
in the “DIGITAL OUT/OPTICAL" terminal of this unit. Remove
this cap only when a connection is to be made to this terminal.
CAUTION
When using the optical-fiber cable, please keep the following points
in mind:
1. The maximum length of optical-fiber cable to be used with this
unit is 3 m (approx. 10 ft.).
2. Always make sure the plug is fully inserted. If the plug is not
inserted all the way, an imperfect connection will result.
3. The optical-fiber cable must never be bent or coiled tightly.
Doing so will permanently damage the optical-fiber in the cable
and, therefore, prevent proper data transmission. If the cable
must be coiled (for storage, etc.), the diameter of the loop
should be at least 15 cm (approx. 6 inches).
4. Handle the optical-fiber cable’s plug very carefully. Keep the
plug free from dust or damage. Dust can be removed by wiping
the plug with a soft cloth. Do not use any cleaners or solvents to
clean the plug.
To the
“AC OUTLET”
& - of the amplifier
~ or the graphic
equalizer
or the household
AC outlet
To the ‘REMOTE OUT”
terminal of the graphic equalizer or the tuner
To the “CONTROL” terminal
of the cassette deck
[2] L-type cable (included)
This cable can be used only with a Technics graphic equalizer
or a tuner having the appropriate “REMOTE OUT" terminal.
L-type cable (included)
This cable can be used only with a Technics cassette deck
having the appropriate “CONTROL” terminal.
[4] “UNSWITCHED” outlet
Power is always available, regardless of power switch.
This outlet is exclusively for the connection of other audio
equipment, such as a cassette deck, etc. Be sure the power
consumption does not exceed the wattage specified near the
AC outlet.
AC power supply cord (included)
Note:
The configuration cf the AC outlet and AC power supply cord
differs according to area.

m DISASSEMBLY INSTRUCTIONS
Warning: This product uses a laser diode. Refer to caution statements on page 3.
ACHTUNG: ¢ Die lasereinheit nicht zeriegen.
e
Die
lasereinheit
darf
nur
gegen
eine
vom
hersteller
spezifizierte
einheit
ausgetauscht
werden.
*
This
CD
player
is
equipped
with
FPC
board,
so
handle
them
with
care
during
disassembly
and
reassembly.
Removal of the ornament of disc holder
and the front panel
2
Procedure! A. Ornament of disc holder
1-2
1.
Push
the
disc
holder
slowly
in
the
direction
of the arrow.
2. Release the 1 claw and the ornament in
the direction of the arrow (@) ).
Removal of the cabinet
1.
Remove
the
5
screws
(@
~
@).
Cabinet
B. Front panel
1. Remove the 1 screw (@ ).
2. Slightly pull out the front panel in the
direction of the arrow ({ ),
3. Remove the front panel in the direction
of the arrow { ©)).
4
\
G Front Panel
Removal
of
the
operation
P.C.B.
Procedure
1+2-—3
1.
Remove
the
4
screws
(Q@~
@).
2.
Release
the
8
claws.
Operation PC.B.

_ Remove the 4 screws (@~@G).
|
How
to
check
the
main
P.C.B.
2.
Remove
the
4
connectors
(CN11,
CN12,
CN401,
CN431).
3.
Lift
the
main
P.C.B.
off
the
retention
1.
posts
on
the
chassis.
4.
Remove
the
main
P.C.B.
in
the
direction
2.
of
the
arrow.
Bere:
Removal
of
the
disc
lid
and
holder
Procedure
1,
Remove
the
spring.
1-5
2.
Move
the
disc
lid
in
the
direction
of
the
/
arrow
(@)and
pu!l
out
this
in
the
direction
of
the
arrow
(®).
When
checking
the
soldered
surface
of
the
main
P_C.B.
and
replacing
the
parts,
do
as
shown
below.
Connect
the
main
P.C.B.
ground
terminal
(LINE
OUT
terminal)
to
the
chassis
with
a
lead
wire.
Connect
the
operation
P.C.B.
ground
terminal
to
the
chassis
with
a
lead
wire.
Lead Wire
3.
Pull
out
the
holder
in
the
direction
of
the
arrow
(@).
a,
v2 Holder
qe he Holder & Ring
b.——~ Small Ball
Holder
Caution:
Be
sure
to
handle
the
small
bal
carefully.
4.
Remove
the
ring
in
the
direction
of
the
arrow

we
obit
Ref.
No.
Removal
of
the
disc
holder
and
power|
Ref.
No.
Removal
of
the
loading
unit
6
switch
rod
7
Procedure
1—-2—5-6
A. Disc holder
1.
Pull
the
disc
holder
siowly
in
the
direction
of
the
arrow
until
the
disc
tray
comes
up.
2.
Pull
the
disc
holder
until
it
stops.
3.
Push
the
bracket
of
tray
SW
($1001)
in
the
direction
of
the arrow.
Pull out the disc holder further to remove it.
. Power switch rod
_ Set the power switch in the “OFF” position.
. Remove the power switch rod by using a screwdriver.
Now A
Bracket
of tray
SW(SIOO1)
Screwdriver |
Power Switch ||
Rod
Dise Tray
pos Checking of the servo P.C.B.
Procedure ;
+ 2-5 eWhen checking the soldered surface
— J—
of the servo P.C.B. and replacing the
parts, do as shown below.
Note: insert the loading unit into the tabs of the front
panel. (Fixed loading unit)
Secure the optical pickup assembly with a clip.
(Otherwise the clamper will interfere with the disc,
restricting turntable rotation.)
Servo PC.B.
Front Panel
Procedure
1+2+5+6-7
1. Remove the 3 screws (@~ @).
2. Remove the 3 connectors (CN12, CN401,
CN431).
ag
(To play a disc)
1. Place the test disc.
2. Reinstall the disc lid to the loading unit.
3. Turn “ON” the power switch of the player.
4. Push the bracket of tray SW ($1001) in the direction
of the arrow and release it.
Note: |f the test disc fails to rotate, press the tray switch
again.
Test Disc
\ Tray SW
(SI001)
Loading Unit

Procedure
1-2-5
-+6-7-9
Procedure
4—-2--5
6-10
Procedure
4-256
—>4{2
1.
Remove
the
4
screws
|
@~
9).
2.
Remove
the
FPC
board
(CN101)
3.
Remove
the
1
connector
(CN102)
Caution :
Drive Belt
To
prevent
the
breakdown
of
the
laser
diode,
antistatic
shorting
pin
is
inserted
into
the
FPC
board.
4.
Remove
the
drive
belt.
2.
Release
the
clamping
spring.
3.
Unsolder
the
2
terminals
of
the
lead
wire
of
the
loading
motor.
1.
Remove
the
5
screws
(@9~®).
2.
Remove
the
1
connector
(CN11).
3.
Unsolder
the
2
terminals.
from
the
optical
pickup.
of
the
turntable
motor.
£40
Procedure
4--2-—
5-6
—-7-
9-11
screws
(@
~
@).
the
optical
pickup.
1.
Remove
the
4
2.
Remove
the
FPC
board
from
Optical
Pickup
Unit
/
[- Optical
Pickup