EasyManua.ls Logo

Sharp SYSTEM-CD555ZT(GY) - Tape Mechanism Exploded View

Sharp SYSTEM-CD555ZT(GY)
36 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
SYSTEM-CD555ZT
WAVEFORMS
OF
CD
CIRCUIT
2V/imS(DC}
xNo
defect
Potential
;
=
difference
0V—
:
’
{When
playing
back
the
disc}
sDefect
to
dise
(ditto)
oe:
Potential
difference
0V——
(When
playing
+—
ee
back
tho
disc}
2
If
defect
oxists.
pulse-like
noise
as
shown above
appears.
(Similar
noise
is
found
also
in
C2]
output
and
TE.
FE
signals.)
@
©.
20v70.
5msiD0)
Potential
:
difference
OV
—4
(When
playing
back
the
disc)
©
20nv/2ms
Center
1/2Vce
(When
playing
:
back
the
disc)
{|
i!
ae
fare
tat
aoe
4)
0.
5V/0.
5uS(AC)
OP
rer
Ed
ROO
REX
RRRIXRRR
NX
BANYA0.6.0.099.0.9,0,0,0.0050.05
AOR
AEESOSOOOS
(When
playing
back
the
disc)
In
TEST
MODE
3
0.
5V/1mS(DC)
In
_
playback
mode
0.
5V/1mS
(DC)
Center
1/2Vec
In
TEST
MODE
2
(State
where
a
dise
is
not
placed.)
(The
Tens
is
moved
ST
up
and
down.
)
>
wtf
toes
seri
es
xThe
storage
oscilloscope
was
used
for
measurement.
(On
the
ordinary
oscillescope
the
bright
point
appears
as
triangular
wave
as
shown
above.
)
2
Spin
motor
PWM
output
(When
playing
back
the
disc)
0.
2V710uS(DC)
Pw
Usel0:1
probe
to
connect
50mV/0. SuSiAC)
(When
playing
back
the
disc)
UseiO:1
probe
to
connect
2V/0.
1#S(DC)
(When
playing
back
the
disc)
ier
®
lkHz
0dB
(When
playing
back
the
test
disc)
7”
—
1V/0.
SmS{AC)
:
@
2veivive)
FOCUS
ON
in
playback
modo
and
test
mede:3.6V
—
In
stop
mode:
0V—~
@
2vaivioe
lf
defect
exists
on
the
disc
and
in
track
search
mode
the
pulse—like
"L”
Level
appears
as
shown
below.
——
In
playback
mode:4.
8V_.
i
{
:
i
.
3
a
Oe
*
lf
the
disc
rotates
and
the
HF
signal
is
tuned
with
the
tnternal
signal
of
1C.°H"
level
appears.
a
ees
TROUBLESHOOTING
(CD
SECTION)
When
the
CD
does
not
function
When
the
CD
section
does
not
operate
When
the
objective
lens
of
the
optical
pickup
is
dirty
this
section
may
not
operate.Clean
the
objective
lens,and
check
the
playback
operation.When
this
section
does
not
operate
even
after
the
above
step
is
taken,check
the
following
items.
Remove
the
cabinet
and
follow
the
troubleshooting
instructions.
"Track
skipping
and/or
no
TOC(Table
Of
Contents)
may
be
caused
by
a
build
up
of
dust
other
foreign
matter
on
the
laser
pickup
lens.
Before
attempting
any
adjustment
make
certain
that
the
lens
is
clean.
If
not,
clean
it
as
mentioned
below.”
1.
Turn
the
power
off.
2.
Gently
clean
the
lens
with
a
jens
cleaning
tissue
and
a
small
amount
of
isopropyl
aicohol.
Note:
Do
not
touch
the
lens
with
the
bare
hand.
;
Set
a
disc,
turn
on
the
power,
set
the
FUNCTION
switch
to
CD,
and
check
the
voltage
of
flat
wire(1-9pin).
is
the
voltage
as
shown
in
the
schematic
diagram
being
output?
No
Yes
Does
the
LCD
function?
No
>
Check
the
item
of
“The
LCD
does
not
function”.
Yes
Does
the
laser
go
on
in
test
mode
1?
1
Check
the
item
of
‘The
laser
does
not
go
on”.
Yes
Is
test
mode
1
switched
to
test
mode
2?
No
Check
the
item
of
“Does
not
focus’.
No
Yes
Test
mode
2
switched
to
mode
3
does
the
No
Check
the
item
of
“The
spin
motor’s
CLV
servo
is
defective”.
Check
the
power
circuit
of
the
main
unit.
|
spin
motor
run
normally?
Yes
is
the
output
of
pin
3
(HF)
of
TP751
flat
in
test
mode
4?
No
Yes
When
the
pickup
moves
to
a
track
using
the
Does
the
slide
motor
run?
Check
the
item
of
“The
slide
motor
does
UP/DOWN
button
in
test
mode
5,
is
there
No
Yes
No
|
not
run”.
Check
the
item
of
“HF
error’.
audio
output?
Check
the
item
of
“There
is
no
audio
output’.
Yes
i
When
the
power
is
turned
off
and
then
on,
is
Is
the
pickup
in
switch
set
to
OFF?
Is
the
pickup
returned
to
the
inner
-
the
unit
initialized?
N
position?
No
are
OFF
ON
Check
the
peripheral!
The
pickup
in
The
pickup
in
switch
is
defective
(ON).
circuits
of
the
control}
switch
is
microcomputer.
defective.
Yes
Does
the
disc
track
up
in
order
(1st
track,
2nd
track,...)?
No
Yes
Does
the
disc
play
back
several
ten
seconds
|
even
after
starting
playback?
No
‘
Yes
Check
the
item
of
“Track
searching
is
impossible”.
Check
the
item
of
“The
slide
servo
does
not
function’.
The
LCD
does
not
function.
Is
there
+5
V
at
pin
6
of
CNP951?
Yes
No
Is
there
+5
V
at
pin
24
(Vcc)
of
1C750?
Yes
Is
there
+5
V
at
pins
16
(ACLR)
and
17
(RESET
1
OUT)
of
C750?
Check
the
PWB
patierns
from
pin
1
of
flat
wire
to
CNP951.
Check
the
PWB
patterns
from
pin
1
of
flat
wire
to
pin
24
(Vcc)
of
1C750.
No
If
C840
is
not
short-circuited,
1C750
is
defective.
ts
there
+5
V
at
pin
2
of
CNP951?
Check
the
PWB
pattern
from
IC750.
o
No
Yes
When
shorting
the
both
ends
of
C840,
do
IC750
is
defective.
the
pins
16
(ACLR)
and
17
(RESET
1
OUT)
No
of
1C750
read
0
V?
Yes
When
shorting
C840
for
a
moment,
does
the
LCD
function?
Check
the
LCD
PW
of
CD.
C840
is
defective.
Bilt
em

Related product manuals