JVC PC-X95B User manual

JVC
PC-X95pvevcener
SERVICE MANUAL
Contents
Page
Safety Precautions
@ Instructions (Extract)
T]
Location
of
Main
Parts
occ
eeeeesssessessecneeneeseens
15
|
Removal
of
Main
Parts
.....
ce
eeeeeeeccseeeseceseesseeseenes
16
Receiver SECTION .......ccecccceccceesececetneceeeersteneeeeessaees 16
Cassette Mechanism Section 0.0.0.0... 19
[3]. Main Adjustment oo... cece ce ceteseeeerteeteretenreeens 20
[4] Wiring Connection «oo... cesses eesti 25
5]
Standard
Schematic
Diagram
ou...
cece
26
Amplifier
Circuit
.........ccccccccccesessesenstereceteeaseseerteeees
CD Amplifier Circuit... eccececseseseeeeeeeeeeeeienes
CD Control/Tuner Circuit
SI [ol]
[o
) isc
DIGITAL AUDIO
Area Suffix
Continental Europe
Germany
Northern Europe
Page
Block Diagrams... ose ie lee eeneeeet 29
Location of P. C. Board and Parts List ..... 30
Main: Board occ iieliliiecicdsiesssievapeseset
CD: Amplifier Board oo... cece cia cesiceeeeesestsees
CD Controller Board oo... eceeceeereeens
Exploded View of Enclosure .
ReCeIVEr SECTION ooo. eececeeceesscescsseceeseseseeeeeceerernernes
Speaker Box Section ooo... eeccecceeeeetereneerereeteeee
Exploded View of Mechanism ............::cceecceceeeeeeeee 40
Cassette Mechanism ...........cccccseessseccesssneeeeeeeerees 40
CD Mechanism .
PACKING: 2.esesues oie es ect eianies ede howetns
No. 1859
June 1992

2C-X95 B/E/G/EN/GI
1.
ad
5
_
This
equipment
has
been
designed
and
manufactured
to
meet
international
safety
standards.
_
It
is
the
legal
responsibility
of
the
repairer
to
ensure
that
these
safety
standards
are
Safety
Precautions
The
design
of
this
product
contains
special
hardware
and
many
circuits
and
components
specially
for
safety
purposes.
For
continued
protection,
no
changes
should
be
made
to
the
original
design
unless
authorized
in
writing
by
the
manufacturer.
Replacement
parts
must
be
identical
to
those
used
in
the
original
circuits.
Services
should
be
performed
by
qualified
personnel
only.
Alterations
of
the
design
or
circuitry
of
the
product
should
not
be
made.
Any
design
alterations
of
the
product
should
not
be
made.
Any
design
alterations
or
additions.
will
void
the
manufacturer’s
warranty
and
will
further
relieve
the
manufacture
of
responsibility
for
personal
injury
or
property
damage
resulting
therefrom.
.Many
electrical
and
mechanical
parts
in
the
products
have
special
safety-related
characteristics.
These
characteristics
are
often
not
evident
from
visual
inspection
nor
can
the
protection
afforded
by
them
necessarily
be
obtained
by
using
replacement
components
rated
for
higher
voltage,
wattage,
etc.
Replacement
parts
which
have
these
special
safety
characteristics
are
identified
in
the
Parts
List
of
Service
Manual.
Electrical
components
having
such
features
are
identified
by
shading
on.
the
schematics
and
by
(A\)
on
the
Parts
List
in
the
Service
Manual.
The
use
of
a
substitute
repalcement
which
does
not
have
the
same
safety
characteristics
as
the
recommended
replacement
parts
shown
in
the
Parts
List
of
Service
Manual
may
create
shock,
fire,
or
other
hazards.
The
leads
in
the
products
are
routed
and
dressed
with
ties,
clamps,
tubings,
barriers
and
the
like
to
be
separated
from
live
parts,
high
temperature
parts,
moving
parts
and/or
sharp
edges
for
the
prevention
of
electric
shock
and
fire
hazard.
When
service
is
required,
the
original
lead
routing
and
dress
should
be
observed,
and
it
should
be
confirmed
that
they
have
been
returned
to
normal,
after
re-assembling.
_
Leakage
currnet
check
(Electrical
shock
hazard
testing)
After
re-assembling
the
product,
always
perform
an
isolation
check
on
the
exposed
metal
parts
of
the
product
(antenna
terminals,
knobs,
metal
cabinet,
screw
heads,
headphone
jack,
contorl
shafts,
etc.)
to
be
sure
the
product
is
safe
to
operate
without
danger
of
electrical
shock.
Do
not
use
a
line
isolation
transformer
during
this
check.
@
Plug
the
AC
line
cord
directly
into
the
AC
outlet.
Using
a
“Leakage
Current
Tester”,
measure
the
leakage
current
from
each
exposed
metal
parts
of
the
cabinet
,
particularly
any
exposed
metal
part
having
a
return
path
to
the
chassis,
to
a
known
good
earth
ground.
Any
leakage
current
must
not
exceed
0.5mA
AC
(r.m.s.).
@
Alternate
check
method
Plug
the
AC
line
cord
directly
into
the
AC
outlet.
Use
an
AC
voltmeter
having,
1,000
ohms
per
volt
or
more
sensitivity
in
the
following
manner.
Connect
a
1,5000
10
W
resistor
paralleled
by
a
0.15
uF
AC-type
capacitor
between
an
exposed
metal
part
and
a
known
good
earth
ground.
Measure
the
AC
voltage
across
the
resistor
with
the
AC
voltmeter.
Move
the
resistor
connection
to
each
exposed
metal
part,
particularly
any
exposed
metal
part
having
a
return
path
to
the
chassis,
and
meausre
the
AC
voltage
across
the
resistor.
.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity.)
Now,
reverse
the
plug
in
the
AC
outlet
and
Place
this
repeat
each
measurement.
Any
voltage
Doe
aiosel
measured
must
not
exceed
0.75
V
AC
(r.m.s.).
15000
10W
metal
part.
This
corresponds
to
0.5
mA
AC
(r.m.s.).
Good
earth
ground
Warning
maintained.
.
Repairs
must
be
made
in
accordance
with
the
relevant
safety
standards.
_
It
is
essential
that
safety
critical
components
are
replaced
by
approved
parts.
_
If
mains
voltage
selector
is
provided,
check
setting
for
local
voltage.
2 (No. 1859)

| PC-X95 B/E/G/EN/GI
B& Important Management Points Regarding Safety Power Amplifier Board
(Items Demanding Special Safety Precautions)
@
The
power
transformer
must
be
checked
by
the
following
@
Since
the
following
parts
are
hea
generating
ones,
they
must
not
markings
as
well
as
managed
in
the
fastening
torque
of
the
contact
with
electrolytic
capacitors,
wires,
etc.
screws.
Also
confirm
parts
number
according
to
the
parts
list.
e
Parts
in
box
[7]
are
out
of
JVC
control.
C
:
VITP57P2-12C
(Marking)
fheat
sink],
(0591),
[D996],
[D997],
[D998],
[D999],
@
Power
cord:
Make
sure
of
the
following
markings
and
inspect
1¢801),
1C921,
0911,
exterior
scratch
and
damage.
(Accessories
Parts)
Note:
IC801
(TA8207K)
must
be
checked
if
its
primary
side
is
|
Power
cord
|
Attachment
plug
|
Somes
plug
protected
by
the
primary
barrier
protector.
Fuse
KS-15F
BS6500 5 Confirm ©, g mark on F998 and F999 and they are tightly retained
<IVDE D> KP419C KS-15 or KS-15F by fuse holders.
@®
Confirm
the
AC
socket
marking:
F998
T3,
15A
see
ras
er
©)
Wires
and
so
forth
must
be
securely
clamped
or
fixed
as
illustrated
=
aol
aaa
on
the
left
(at
two
points)
to
keep
them
from
power
active
parts,
mobile
parts,
heating
units
and
sharp-edged
parts.
IMPORTANT
FOR
LASER
PRODUCTS
IDENTIFICATION
LABEL
AND
CERTIFICATION
(For
U.S.A.
only)
LABEL
=
CLASS 1 LASER PRODUCT
2. DANGER: Invisible laser radiation when open and interlock
failed or defeated. Avoid direct exposure to beam.
3. CAUTION: Do not open the rear cover. There are no user
serviceable parts inside the unit; leave all servicing to
qualified service personnel.
4. CAUTION: The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the disc holder is open
and the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5. CAUTION: Use of controls of adjustments or performance
of procedures other than those specified herein may result
in hazardous radiation exposure.
Apparaten innehaller laser
Komponent av héger laserklass
an kiass 1.
VAROITUS! Laite sisaltaa laserdiodin,
joka tahettaa nakymatat6nta silmille
vaarallista lasersateilya.
(No. 1859) 3

1C-X95 B/E/G/EN/GI |
M@
Instructions
(Extract)
FEATURES
1. Portable system incorporating multi-function CD player.
e@CD player with program play of up to 20 tunes/repeat
play function.
Digital LCD (Liquid Crystal Display) indicates the
playback time of each tune and the number and total
playback time of programmed tunes.
@8-cm (3-3/16"’) CD singles’ capability.
2. Synchro-record start for CD recording convenience.
3. Double-cassette mechanism (Deck A for recording and
playback, Deck B for playback).
e Metal and CrO, tape can be played back, for superior
tone quality.
eSynchro start dubbing function (normal/high-speed
dubbing).
e@ Relay playback (from Deck B to Deck A).
e@ Full auto-stop mechanism.
4. SUPER BASS HORN system
CONNECTIONS
@Do not switch the power on until all the connections are
completed.
* Space for speaker cords
e@When connecting the speaker cords, connect
the one marked with a line to the '’-"’ ter-
minal first.
* After connecting the speaker
cords, bundle any slack into the
space for the speaker cords in the
@ Marked with line
: : rear panel.
4 (No. 1859)

| PC-X95 eeverewar
NAMES
OF
PARTS
AND
THEIR
FUNCTIONS
® Top panel
@ Disc holder
@
Disk
holder
open
button
(PUSH
OPEN)
(
©
)
©
Display
window
(CD
player
section)
()
Track
(tune)
number
display
(2)
Program
order
number/Time
(minute)
display
(3)
Time
(second)
display
(4)
Playback
indicator
(
>)
|
-
(5)
Pause
indicator
(
af)
©—
ll
|
OTL
o
(6)
Program
mode
indicator
(PROGRAM)
o—H
ILI?
o!-
(7)
TIME
mode
indicator
GS
Repeat
playback
indicator
(=
ALL)
TH
red
SEARCH PP STOP/CLEAR PLAY/ PAUSE
MEMORY REPEAT
/CALL .
@ CD operation buttons
@)
MEMORY/CALL
button
(2) REPEAT button
(3)
SEARCH
(i@<@
/
Bi)
button
(@
STOP/CLEAR
(
D
)
button
(5) PLAY/PAUSE (8 ) button
(No. 1859) 5

'1C-X95 B/E/G/EN/GI |
@ Dial scale
@ TUNING knob
@ FINE TUNING knob
© POWER switch
© VOLUME control
@ BASS control
@ TREBLE control
@ FUNCTION switch
cD
Set
to
this
position
when
listening
to
or
recording
from a CD.
TUNER
Ser
to
this
position
when
listening
to
or
recording
from the radio. -
TAPE-HIGH SPEED DUBBING
Set to this position to dub at high speed.
TAPE-NORMAL SPEED DUBBING
Set
to
this
position
to
listen
to
a
cassette
or
dub
at
normal speed.
@®
TAPE
(FOR
PLAYBACK)/FM
MODE/BEAT
CUT
switch
TAPE (FOR PLAYBACK) switch
Set
this
switch
according
to
the
type
of
tape
to
be
used.
NORMAL:
Set
to
this
position
to
listen
to
a
normal
(type
|)
tape.
METAL-CrOz: (playback only)
Set
to
this
position
to
listen
to
a
metal
(type
IV)
or
chrome (type !I) tape.
FM MODE switch
STEREO:
Set
to
this
position
to
listen
to
or
record
an
FM stereo broadcast.
MONO:
Set
to
this
position
when
FM
stereo
reception
is obscrued by noise.
BEAT CUT switch
Usually set to ‘’1 NORM”’ position.
Beats which may occur while recording an AM broad-
cast
can
be
eliminated
by
changing
the
position
of
this switch.
@ BAND switch (FM/AM)
@
Cassette
holder
(Deck
A)
©
Cassette
holder
(Deck
B)
@
Cassette
operation
buttons
(Deck
A)
OREC:
Press
this
button
with
the
B»
PLAY
button
to
start
recording.
& PLAY:
Press to play the tape.
@#<4REW:
Press to rewind the tape rapidly,
PP Fr:
Press to wind the tape forward rapidly.
w /2STOP/EJECT:
Press
to
stop
the
tape.
Pressing
this
button
after
the
tape
stops
opens
the
cassette
holder.
G8 PAUSE:
Press
to
stop
the
tape
temporarily.
Press
again
to
re-
lease the pause mode.
@®
Cassette
operation
buttons
{Deck
B)
PLAY:
Press to play the tape.
@4REW:
Press to rewind the tape rapidly.
bP FF:
Press to wind the tape forward rapidly.
@/4STOP/EJECT:
Press
to
stop
the
tape.
Pressing
this
button
after
the
tape stops opens the cassette holder.
6 (No. 1859)

| PC-X95 B/E/G/EN/GI
@ Rear panel
@ SPEAKER terminals
Connect the provided speakers to these terminals.
® Telescopic antenna for FM reception.
@ DC (12 V) jack
@ AC IN (AC input) jack
@® Battery compartment cover
@® PHONES jack (3.5 mm dia. stereo mini)
Connect headphones (impedance 16 2 — 1 kQ) to
this jack. The speakers are automatically switched off
with the headphones connected.
PLAYING COMPACT DISCS
Entire
tune
playback
.
...
The
following
example
shows
using
a
compact
disc
which
contains
10
tunes
and
a
total
playback
time
of
50
minutes,
45
seconds.
.
ky
Press
to
start
the
playback.
The
track
Operate
in order
shown.
:
(tune)
number
and
playback
time
are
displayed.
Set to CD.
The disc starts rotating and the total
number of track (tune) and total play-
back time are displayed.
Track (tune) number.
Dispiays elapsed playback time of each tune
being played back.
@ Adjust.
¥} Press to open the disc holder.
ome RK} Load a disc with the label side facing
@ Set to ON. (-) up. Close the disc holder.
(No. 1859) 7

'C-X95 B/E/G/EN/GI |
Skip playback
e During playback, when skipping to the beginning of the
next tune or the tune being played back or the previous
tune, the beginning of the tune is easily located and the
playback starts from there.
To listen to the next tune...
Press the PB button once to kip to the beginning of the
next tune.
To listen to the previous tune...
Press the kK button to skip to the beginning of the tune
being played back and press again to skip to the previous
tune,
Search playback (to locate the required position on the
disc) —
@ The required position can be located using fast-forward or
reverse search during playback.
@Hold down the button and the search playback starts
slowly and then gradually increases speed.
e@Since a small sound (about one quarter of playback level)
can be audible in both modes, release the button when the
required position is located while monitoring the sound.
To stop playback
@ To stop in the middle of a disc
During programmed playback, press the ] STOP/CLEAR
button once to stop playback; press again to cancel the
program.
© To stop a disc temporarily
Press the [>®PLAY/PAUSE button to stop a disc tem-
porarily. When pressed again, playback resumes from the
point where pause was engaged.
Caution:
When changing discs, press the O STOP/CLEAR button;
check that the disc has stopped rotating completely before
unloading it. :
Notes:
@ The following indication may be shown when a disc is dirty
or scratched, or when the disc is loaded upside down.
In such a case, check the disc and insert again and clean or
change the disc.
@
Do
not
use
the
unit
at
excessive
high
or
cold
temperatures.
The
recommended
temperature
range
is
5°C
(41°F)
to
35°C
(95°F).
@
After
playback,
unload
the
disc
and
close
the
disc
holder.
©
If
mistracking
occurs
during
playback,
lower
the
volume.
@
Mistracking
may
occur
if
the
unit
is
given
a
strong
impact
or
is
used
in
a
place
which
is
subject
to
vibrations
(i.e.
in
a
car
travelling
on
a rough
road).
8 (No. 1859)
‘ iO@ SEARCH DPI
MEMORY REPEAT
sCALL
OO
Wed) SEARCH
Memon REPEAT
Keep pressing for the fast-reverse search
@qd SEARCH
Me EMORY REPEAT
Keep pressing a the fast-forward search
STOP/CLEAR PLAY/ PAUSE" -
STOP/CLEAR PLAY/ PAUSE

| PC-X95ee/cenal
Programmed playback
@ Up to 20 tunes can be programmed.
When
there
are
Jess
than
20
tunes
on
a
disc,
the
total
@
playback
time
of
programmed
tunes
is
displayed
(up
to
99
minutes,
59
seconds).
MEMORY
REPEAT
@
Press
the
MEMORY/CALL
button
to
set
to
the
program-
O
E>
ming
mode.
@
Press
to
designate
the
required
track
number.
:
eTo
count
down
the
track
number,
press
the
<q
but-
ton.
®
Press
the
MEMORY/CALL
button
to
program
the
track
@
(tune)
number.
Waa SEARCH DBA When designating the Sth tune.
e@
Repeat
steps
@®
and
®
to
program
other
tunes.
@
Press
the
[>u
PLAY/PAUSE
button
when
programming
is
completed.
Programmed
playback
starts.
®
Playback time of the 5th tune When programming the 12th tune.
MEMORY REPEAT
7CALL
aa
Total playback time of programmed tunes is
displayed.
The Sth tune The 12th tune
PLAY/ PAUSE
ADO
To
clear
programmed
tunes....
:
Press
the
()
STOP/CLEAR
button
before
playback.
During
programmed
playback,
press
this
button
twice.
When
the
disc
holder
is
opened,
the
programmed
tunes
are
automatically
cleared.
Tune
number
Program
order
number
To
confirm
the
details
of
programmed
tunes....
When
the
MEMORY/CALL
button
is
pressed,
the
details
of
programmed
tunes
are
displayed
in
the
programmed
order.
ewony
REPEAT
Repeat
playback
—
O
al
o
E>
ce
o>
Goes
off
Press
the
REPEAT
button
before
or
during
playback.
A
Single
tune
All
tunes
Repeat
playback
is
single
tune
or
all
the
tunes
can
be
repeated.
released.
A
single
tune
and
all
the
tunes
can
be
specified
separately.
Each
time
the
REPEAT
button
is
pressed,
the
mode
will
be
changed
from
a
single
tune
(Cs)
to
all
the
tunes
(
Ce
ALL)
to
the
clear
mode,
in
this
order.
The
5th
tune
©
Repeat
playback
of
a
single
tune
(Ce
}
The
tune
being
played
back
can
be
heard
repeatedly.
@ Repeat playback of all the tunes ( G ALL)
When
playing
back
the
entire
disc
or
programmed
tunes,
all
|
the
tunes
or
the
prograramed
tunes
can
be
heard
repeated-
ly.
(No. 1859) 9

C-X95pve/ceve |
CASSETTE PLAYBACK
(The example shows deck A)
Operate in order shown.
TEGRCTION)
coe
=. @ Set to TAPE.
LD Set the TAPE switch as required.
NORMAL
ay
cas
@ Set to ON. (-—)-
@ Adjust.
@e Load a cassette.
is
@ Playback in deck B
The
previous
procedures
4]
and
8
also
apply
to
deck
B
when
a
cassette
is
loaded
in
deck
B.
When
decks
A
and
B
are
simultaneously
set
to
the
play
mode,
only
the
playback
sound of deck B is heard.
RELAY PLAYBACK
(From deck B to deck A)
Operate in order shown.
3] Adjust.
Press to start playback.
Notes:
1. When the power is turned off while the tape is running,
cassette operation buttons which are depressed do not
return to the original positions.
Press the M@/4 STOP/EJECT button to stop the tape
running before turning off the power.
2. Avoid operating the FF or REW button on the deck during
playback of the other deck.
rene
Set to TAPE. =...
by Set the TAPE switch as required.
@ Set to ON. (-—)
@ Load a cassette.
B) Load a cassette.
Notes:
1. Use the same type of tape in decks A and B.
@ Set deck A to the play-pause mode. :
2. When deck B stops, deck A’s pause mode will be released and it will start playback. When deck A stops automatically, relay playback will be
released.
10 (No. 1859)