Sanyo CP10 User manual

SERVICE MANUAL
COMPACT
DISC
PLAYER
[|
|
=
(GENERAL)
(U.S.A)
(CANADA)
(AUSTRALIA)
(EUROPE)
(ITALY)
CONTENTS
SPECHAICATIONS 34. Geerity pies Sia aald ace aa RS one BAG tod ai AS ae Be ane it Ciera Re, ees, Sa 1
BEFORE DISASSEMBLING AND REPAIRING 2.00... eee 1
PRECAUTION FOR HANDLING PICKUP ©... ee ee ee eee es 2
DESCRIPTION OF LASER BEAMCONTROL CIRCUIT J... ee ee ee 3
DETAILS: OF PICKUP oi55 facie eee pa tea wee ae ee ae he ie Se eee Faas eae ee Ses 4
DISASSEMBLY: 5 oan cw Ste GAA eae dee PREMERA SAS ES Ea SG go ghee GE Dew acest 5
ADJUSTMENT odo vetis- eS a8 a oe o- aieheet ens Gow Tikes Ges Pe ne bald ceed ad Gaeta sew Biel Benes 8
NORMAL WAVE FOAMOF TEST POINT .. 0.0... 00... c ee eee ee eee ee eee eet eee 1
IC BLOCK DIAGRAM ............00 0000 wees wae ee ME os eM sna, By BUR gay Way ond ENS, ae ae eee 14
EXPLODED VIEW ( CABINET ) i ge See Ga ee ee a Se Pe ee ee eS ee ae eee 24
PARTS IST wut coca tnete dees is Sek Sees REY lh ee aed okay alos nant as sik Pe ple oP ohn tts ae Bedard 25
EXPLODED VIEW { MECHANISM) 00.0.0... 0c cece scene eens eens nese tee en eee eaen enemies 30
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WIRING CONNECTION DIAGRAM .. 0... 6 ee ee eee eee ee EE 34
SCHEMATIC DIAGRAM Occcc bai are SS Ee ONG Sele ae ee a ee ey ee es VE a Ra 36
WIRING. DIAGRAM:( MAING 6 ou ok oe ee ce oe eae he Pe MR Oe EE Be SS Ea Ra Bo 38
SCHEMATIC AND WIRING DIAGRAM ( AC SOCKET, DC POWER P.C.BOARD) ............0..000065 40
TROUBLESHOOTING FLOW CHART 4s ctgig weoe dh oe ae lee Re a els in Ow eS A es a Ba 42
WIRING DIAGRAM COTHERS.): 3a eee de ore eS pe one eee a ERE Ca ka ge ewes 44
IC: BEOCK DIAGRAM Wo sa hen eGo ea oo ees CHER Sa Eos UG hg se Daa ee nei eee Re 45
WM-17964

en’
SPECIFICATIONS
Audio
General
Channels............
2channels
Power
supply.........
AC
110-127/200-220/230-250V
e
Frequency
response
....20
—
20,000
Hz
50/60Hz
...
GENERAL
Dynamic
range........
90
dB
AG
120V
60Hz
...
U.S.A,
Channel
separation
.....
80 dB
(
1
KHz)
CANADA
ohana
bene
e
sees
aoe.
:
a
)
AC
240V
50Hz
...
AUSTRALIA
ow and flutter ....... ndetectable
AC 220V 50Hz ... EUROPE
Outputs
..........6.
LINE
OUT:
1.6V/50K
ohms
‘
ITALY
E:
HEADPHONE:
30mW/32
ohms
DC
+7.2V~
B4V
Signal
format
Power
consumption
....10W
Sampling
frequency
....44.1
KHz
Dimentions
..........
approx.
127
x
41.5
x
187
mm
Quantization
.........
16
bits
linear/channel
(WxHxD)
(5x
1-5/8”
x
7-3/8")
Weight { approx.)...... 900 g( 1 Ibs. 15 oz. )
Pickup
System
............0.
Objective
drive
system
light
pickup ee ,
Light
source
.........
Semiconductor
laser
Specifications
and
design
subject
to
change
without
notice.
=
Wave length.......... 790 nm
BEFORE DISASSEMBLING AND REPAIRING
a Many ICs and a pickup are used in this compact disc
player and these components are very sensitive to
static electricity and can break down if exposed toa
high static voltage. They must therefore be handled
very carefully,
b Since pickup consists of many optical components
and other precision components, do not repair it or
store it in a hot or humid place, near strong mangetic
fields, or in a dusty location.
c¢ When replacing any of the components of a CD
player, first switch OFF the player and disconnect
the power cord from the player.
d
Ground
all
equipments,
measuring
instruments,
and
tools.
e Place an electrically conductive sheet on the work
bench and ground it. After removing a pickup from
its conductive pouch, do not place it on the pouch.
Because it may be damaged due to static electricity.
f
Ground
a
soldering
iron
to
prevent
AC
leakage.
g
Ground
a
worker
with
metal
band
(
1M
ohms
)
to
ground
static
electricity
which
may
build
up
on
the
body,
h Because static electricity which builds up on clothing
does
not
ground
through
the
metal
band,
be
careful
not to touch your clothing to the pickup.
i Do not directly look at the laser beam emitted from
the
pickup
or
aim
it
at
your
fingers
or
skin.
Armband
Resistor
(1M ohm)
Senate Sheet
Resistor —*
(1M ohm)

what,
PRECAUTION
FOR
HANDLING
PICKUP
—-_-_———————————
# (1)
a
4
b
(2)
c
\ d
.
e
)
f
Precautions
for
transportion
and
storage
Store
the
pickup
in
its
conductive
pouch
until
just
before
using
it.
:
Do
not
apply
external
pressure
or
shock
to
the
Pick-
up,
ressure x
Pressure
Dropping
store
in
conductive
pouch
Magnet
Precautions
for
handling
of
the
pickup
Since
the
pickup
has
a
powerful
magnet
in
itself,
do
not
leave
it
near
a
magnetic
field.
When
handling
the
Pickup,
hold
it
correctly,
and
do
not
apply
external
pressure
or
shock
to
it.
If
you
apply
extremely
strong
pressure
or
shock
to
it,
it
may
mulfunction
or
its
printed
circuit
board
may
crack,
The
pickup
is
a
single
component
and
has
been
accu-
rately
adjusted
as
such.
Do
not
touch
any
adjustment
point
and
mounting
screws.
If
the
laser
beam
strikes
your
eye,
it
may
be
damaged.
Do
not
under
any
circumstances
allow
the
laser
beam
to
strike
the
eye.
Also,
do
not
under
any
circum-
stances
apply
a
voltage
to
a
pickup
whose
laser
out-
put
section
(
objective
lens,
etc.
)
is
damaged.
Method of holding pickup
Laser Beam
Cleaning lens surface
If
dust
gets
onto
the
surface
of
the
lens,
blow
it
away
using
an
air
brush.
The
lens
is
retained
by
an
extreme-
ly
delicate
support
spring.
When
cleaning
the
lens
surface,
therefore,
use
a
soft
cotton
stick
moistened
with
iso-propy!
alcohol
and
clean
the
lens
very
gently,
taking
care
not
to
bend
the
support
spring.
(
other
liquid
may
injure
the
lens
)
Also,
do
not
use
an
ex-
cessive
amount
of
cleaning
fluid
otherwise
it
will
flow
into
the
pickup.
Do
not
disassemble
the
pickup.
Do
not
directly
look
at
the
laser
beam
or
aim
it
at
the
fingers
or
skin.
COTTON SWAB
CONDUCTIVE SHEET

DESCRIPTION OF LESER BEAM CONTROL CIRCUIT
(1) Laser operation circuit
(2) Operation of the circuit
a_ By turning “ON” the POWER switch (S601) after the
power cord is plugged in or the battery pack is con-
nected to the unit, then closing the top lid, the
CLOSE switch (S609) [ and LASER switch ($901) hoa a
eet EUROPE/AUSTRALIA/ITALY only } will go
EUROPE
“ON”, and pin 35 of 1C501 (OPEN/CLOSE) becomes ae aay pecpOweR
“LOW” level. Fu eae only
b Press the PLAY key (S604) or the MEMORY key 5901
| | CIRCUIT
ney
(S605). While the key is pressed, pin 15 (PLAY/ ana diy
PAUSE)
or
pin
16
(MEMORY)
of
IC501
becomes
:
i
ON/OFF
“LOW”,
c Pin 19 (HOLD) of 1C501 becomes “HIGH”, and the
hold condition of 1C501 will be cancelled.
d Consequently, pin 28 (P-CONTL) of 1C501 becomes
"LOW", and “HIGH” voltage will be applied to the
POWER ON/OFF terminal of the +5.2V DC POWER
BLOCK via 0502.
e -—5,2V output from DC POWER BLOCK is applied
to the APC circuit of the pickup, and causing the
pickup emits the laser beam.
Safety Operation
1c801
@
a
When
the
top
lid
of
the
unit
is
open
with
the
POWER
SPEN
IETOEE
a
|e
switch
is
“ON”,
even
if
you
press
the
PLAY
key
or
MEMORY
key,
the
pickup
will
not
emit
laser beam
because
the CLOSE switch (S609)
[
and
LASER
1c501 (15), (6) i f ais switch (S901) ..... EUROPE/AUSTRALIA/ITALY
PLAY
/
PA
PLAY
/
PAUSE.
only
]
is
“OFF”
and
pin
35
of
IC501
remains
“HIGH”.
MEMORY ry When the PLAY or MEMORY key is pressed without
i loading a disc, the pickup emits laser beam, but sever-
1c501
| |
al
ener
later
it
will
ep
to
emit
laser
beam
as
safety
HOLD
===>
circuit
defects
that
there
is
no
disc.
c Even in the event that 1C501 breaks down and the
10501 @8) pickup emits laser beam, it will not directly enter the
P-CONTL eye because of the opaque cover.
+5,2V
DC
POWER
ee
ae
POWER ON/OFF
ov
-5.2V ee eee
52V ----
lou

DETAILS OF PICKUP
as)
(1) Appearance
ACTUATOR
y
FPC
TERMINAL
LASER
DRIVE
CIRCUIT
OBJECTIVE
LENS
FPC
TERMINAL
PHOTO SIGNAL
SENSOR FPC TERMINAL
(2) Optical system
)
COMPACT DISC
FOCUS
+t> TRACKING
LASER DIODE
OIFFRACTION
GRATING
LASER DRIVE ACTUATOR
PHOTO
DIODE
CIRCUIT
FOCUS
OOIL
TRACKING
COIL
(3) Wiring diagram
GND
PHOTO SIGNAL DETECTO
OD®OO®O®O
GND
-Sv
FO
FO:
TO
TO
LASER
DRIVE
CIRCUIT
ACTUATOR
FO
GND
TO
-5V
be
5
FO
T

DISASSEMBLY
in and Sub PCB removals
*
|f
there
is
a
compact
disc
(CD)
in
the
player,
remove
(3)
Main
an
it.
* Disconnect the power plug from the player.
* Disassemble the player in the following sequence:
(1) Bottom lid removal
ACTUATOR
TERMINAL
g
AR S
‘
| PHOTO SIGNAL
SENSOR FPC
TERMINAL ah
LASER DRIVE sean |
CIRCUIT ue
‘ cB
(4) Volume PCB removal

DISASSEMBLY
(5)
Other
PCB
removal
(6)
Top
lid
and
LCD
removals
8
5
T.
4
ey
PC
D BRACKET
[-s
Ss
Qes~
RCA SOCKET OC POWER
PC Bf
y
Z
(7) Circuit bord arrangement figure
j
DC
POWER
PCB
LCD
VOLUME PCB
MAIN PCB
KEY SWITCH PCB

DISASSEMBLY
The
compact
disc
is
a
very
delicate
mechanism.
It
is
very
Important
that
the
spindle
motor
(which
rotates
the
disc),
the
sled
motor,
the
worm
gear,
etc.all
operte
smoothly
and
without
eccentricity.
Care
must
be
taken
not
to
exert
excessive
force
on
the
pickup
and
particular
care
must
be
taken
not
to
touch
either
the
jens
or
the
lens-control
circuitry.replacement
of
the
spindle
motor
(8) Replacement of spindle motor
a Remove the two screw (Y13) which hold escutcheon
mecha cover (see exploded view, Ref no 15, 16 of page
30.)
b Remove the two screw ( 11 ) then, after removing the
upper pulley, universal pulley and spring.
c Loosen screw ( 12 ) which hold tarntable.
d Remove the two screw ( 13) and then replace the spindle
motor.
e After fixed the spindle motor, set the turntable upper
surface so that ti is 4mm + 0.1mm above the chassis.
f With the smaller diameter end of the spring coil upward,
install the universal pulley and upper pulley, and then
secure by using the two screws ( 11 ) for holding the
supper pulley.
g
Check
to
be
sure
that
the
universal
pulley
moves
smoothly
up
and
down.
TURN TABLE
SPINDLE MOTOR
(9) Replacement of sled motor and belt
a
Remove
the
screw
and
spring
plate
with
flat
gear.
b
Remove
the
screw
(
15)
which
hold
worm
gear.
c
Remove
the
two
screw
(
16
)
which
hold
sled
motor
bracket.
Remove
the
two
screw
(
17)
which
hold
sled
motor.
e Replace the sled motor and belt.
(10) Replacement of pick-up
a Remove the screw and springplate with flat gear.
b Remove the screw ( 14 ) and spring plate.
c Replace the pick-up.
11
& PULLEY
CD rier
jen COIL
ER) TABLE
—” & AP
R
ZA
{>
FAAN2 SS
13 me
? S
ZN a
AZ a
~ al
=e J) SPINDLE
MOTOR
@15
Lp voces
a
oe
as
@14
Gy sPRING
PLATE
A

ADJUSTMENTS
SSS
SSS
rs
sp
hs
SSS
Sh
D Before making adjustments, please read the “before disassembling and repairing”
“precaution for handling pickup” “description of leser beam control circuit”and
» “disassembly”
* Service Mode
This mode is used for adjustment when servicing and its
functions are incorporated in the microcomputer (1C501).
Please read following explanation carefully to understand
the function of this mode,
(1) The program of |C 501 operates when the power
switch is “ON” and reset signal is input to pin 18 of
IC 501,
(2) First, select either a service program routine or a
normal routine.
(3) If you select a service program routine, the micro-
processor brings the necessary work from each sub-
routine in accordance with the key inputs, then
executes the work,
With this service mode, you can efficiently check
or
Test disc necessary for adjustment
) Measuring equipment necessary for adjustment
Equipment Model No. (manufacturer)
Synchroscope $S5711 (100 MHz — Doble reflective
BAND-PASS FILTER
Memory scope DSS 6521 (storage scope) kikusui Denshi
AC digital voltmeter | Digital tester or digital multimeter is available IN OUT
DC digital voltmeter | Digital tester or digital multimeter is available
Audio signal generator
Band
pass
filter
Band
pass
filter
(see
attached
drawing)
GNO
GND
Notes;
a Other manufactures’ equipment which has same specificat-
ions with ones designated above may be used.
b Use a probe when observing signal using an oscilloscope,
memory scope or digital voltmeter.

ADJUSTMENTS
1. Setting the service mode
(1)
(2)
(3)
(4)
Disconnect the AC power plug from the unit.
Press the PLAY/PAUSE key or the MEMORY key
due to discharge C904 connected to pin 18 of
1C 501 (RESET) and the +V_ IN smoothing
capacitor (C951). Consequently, pin 18 of IC 501
becomes “LOW”.
Ground the pattern of TP36 (see wiring diagram of
page 38 ~ 39) using jumper wire.
Two kind of IC is used as !C501 in this unit.
Follow step according to the particular part No,
concerned.
TMP47C420AF8172Z ...Connect the AC power
plug. (This mean is not
operation of the power
switch ON/OFF)
TMP47C420AF8173Z °° .Connect the AC power
plug while pressing the
PLAY key.
The player will be in the service mode and the LCD
displays « Og og 00”
2. Particular operation in service mode
(1)
(2)
(3)
(4)
When the SKIP/SEARCH key is pressed, the pickup
moves to the outermost or innermost portion of the
disc. This enables to check the operation of the sled
motor.
When the MEMORY key is pressed, the pickup
perform a focus search. If a disc is loaded in the
unit, the focus servo will go “ON”. If a disc is not
loaded, the focus search will take place indefinitely.
When the REPEAT key is pressed in the condition
of step 2, the tracking servo will go “ON”, and the
unit will go into a play condition.
When the STOP key is pressed at any operating
mode, you can cancel the ongoing operation.
3. Cancelling service mode
Disconnect the AC power plug. and then remove the
jumper wire from the pattern of TP36. (See the wiring
diagram of page 38 ~ 39.)
Tracking balance adjustment
Test disc ; YEDS 18 (Sony)
Measuring equipment ;
Oscilloscope
Connection point ; TP-3
Adjustment point ‘
Adjustment value ;
a
b
SVR - 101
Waveform symmetry
Put the unit in the service mode.
Load the test disc and then press the MEMORY
key.
The
disc
will
rotate
and
the
focus
servo
will
go
ON,
Note: !f the pickup is at the innermost track, first
press the PP key to move the pickup slightly
to the outside and not to play the TOC (zero
pattern) on the disc.
Observe the tracking error signal ( from TP3 ) on
the oscilloscope and adjust SVR101 so that the
waveform becomes symmetrical with respect to
0 V. (See Fig. 1.)
Focus offset adjustment
Test disc ;
YEDS 18 (Sony)
Measuring equipment ; Oscilloscope
Connection point ; TP-2 (FE-Signal) TP - 1 (RF-Signal)
Adjustment
point
;
SVR102
SVR
102
Adjustment value :
o
when unit in STOP status
Connect the oscilloscope to TP2 (FE signal).
Connect the oscilloscope to TP1 (RF signal).
Follow steps (a) and (b) of the “Tracking balance
adjustment” to turn the focus servo “ON”,
Press the REPEAT key, The tracking servo will go
ON, and the player will be in a play condition.
Measure the DC offset voltage of the waveform
[focus error signal from TP2] using a DC voltmeter,
and note the measured value.
Press the STOP key and remove the disc.
Adjust SVR102 so that the DC offset voltage at
TP2 becomes the same as the voltage measured in
step (e).
Re-load the disc, and then follow the steps (c) and
(d) to put the unit in a play condition.
(MEMORY
key
“ON”
>
REPEAT
key
“ON”.)
Confirm
that
the
‘a’
portion
of
the
waveform
(RF
signal)
from
TP1
must
be
a
straight
line,
and
the
‘b’
portion
(eye
pattern)
must
be
open.
(See
Fig.
2).
Also,
verify
that
the
height
of
the
wave
is
maximum,
OPENING EXPANDED
Ao—
Fig. 2
a
(
Voltage when unit in PLAY = Voltage