JVC RC-X3 User manual
RC-X3
B/E/G
EM
=
oliSe
DIGITAL
AUDIO
r
er
“|
|
Area
Suffix
|
a:
Seen
sam
rte
U.K.
|
In
CE.
senitanieoes
Continental
Europe
|
Gt
agelie
delet
vates
W.
Germany
LN
Contents
Page Page
[1]
Important
for
Laser
Products
..............c..cceceeeeees
2
Wiring
Connections
..............cccececececeeeeeeneeeeeetes
20
Safety
Precautions
...............ccccecccec
cece
teense
eens
3
Standard
Schematic
Diagram
(CD
Control)
.........
21
F@
atures:
«2.18.
cehscbseventeencete
tacidapliocnel
sspua
teed
eanies
sea
4
Location
of
P.C.
Board
Parts
and
Parts
List
........
22
[4]
Specifications
4
[11]
Location
of
P.C.
Board
and
parts
List
Names
of
Control
and
Their
Functions
...............
5
(CD
Control
Board)
...............
cece
cece cece sree
ee
eee
25
[6]
Location
of
Main
Parts
..........ccccccceeseeseeeeeeees
6
[12]
Block
Diagram
<.220..:.sc.ti.sccccccsadecdessstabiincdeaaders®
27
Removal
of
Main
Parts
..............cccceceecceee
reece
7
[13]
Exploded
View
of
Mechanism
Assembly
.........---
30
Main
Adjustment
and
Level
Check
....................
12
Exploded
View
of
Enclosure
Assembly
...........-..
32
[9]
Standard
Schematic
Diagram
(Tuner)
................
18
[15]
Packing
Illustration
and
Parts
List
..................655
35
Standard
Schematic
Diagram
(Amplifier)
............
19
ACGCeSSONICS.
<i
20s
tel
ecede
bien
katate
es
Back
Cover
No.
1755
June
1988
RC-X3
B/E/G
11]
Important
for
Laser
Products
PRECAUTIONS
1.
CLASS
1
LASER
PRODUCT
2.
DANGER:
Invisible
laser
radiation
when
open
and
in-
terlock
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
pre-
vent
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
perfor-
mance
of
procedures
other
than
those
specified
herein
may
result
in
hazardous
radiation
exposure.
REPRODUCTION
OF
LABELS
AND
THEIR
LOCATION
ADVARSEL-Der
vil
udstrales
DANGER-Invisible
laser
osynlig
laserbestraling
nar
i¢-\olt-\
olan
7al-10
me)
L-1aRe-
Lalo}
Veer:
le-1(-1a-lelal--mele
W-tit-
ys
interlock
defeated.
ningsmekanismen
frigores.
AVOID
DIRECT
EX-
UNDGA
AT
BLIVE
UDSET
POSURE
TO
BEAM.
FOR
LASERBESTRALING.
VND4220-001
ND4221-001
Obs:
Apparaten
innehaller
laser
Komponent
av
hdger
laserklass
an
klass
1.
VAROITUS!
Laite
sisaltaa
laserdiodin,
joka
lahettaa
nakymatatonta
silmille
vaarallista
lasersateilya.
Warning
TO
REDUCE
THE
RISK
OF
FIRE
OR
ELECTRIC
SHOCK,
DO
NOT
EXPOSE
THIS
APPLIANCE
TO
RAIN
OR
MOISTURE.
The
lightning
flash
with
arrowhead
symbol,
within
an
equilateral
triangle,
is
intended
to
alert
the
user
to
the
presence
of
uninsulated
‘‘dangerous
voltage’
within
the
product’s
enclosure
that
may
be
of
suf-
/
Ay
ficient
magnitude
to
constitute
a
risk
of
electric
shock
to
persons.
CAUTION:
TO
REDUCE
THE
RISK
OF
ELECTRIC
SHOCK,
DO
NOT
REMOVE
COVER
{OR
BACK).
The
exclamation
point
withi
uilateral
triang]|
NO
USER-SERVICEABLE
PARTS
INSIDE.
ae
po
within
an
eq
ng
e
REFER
SERVICING
TO
QUALIFIED
SERVICE
PERSONNEL.
is
intended
to
alert
the
user
to
the
presence
of
im-
portant
operating
and
maintenance
(servicing)
in-
structions
in
the
literature
accompanying
the
appliance.
2
(No.
1755)
RC-X3
B/E/G
_|2)
Safety
Precautions
1.
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.
Service
should
be
performed
by
qualified
personnel
only.
2.
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
manufacturer
or
responsibility
for
personal
injury
or
property
damage
resulting
therefrom.
3.
Many
electrical
and
mechanical
parts
in
the
product
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
(AA)
on
the
schematic
diagram
and
Parts
List
in
Service
Manual.
The
use
of
a
substitute
replacement
which
does
not
have
the
same
safety
characteristics
as
the
recommended
replace-
ment
part
shown
in
the
Parts
List
in
Service
Manual
may
create
shock,
fire,
or
other
hazards.
4.
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.
5.
Leakage
current
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,
control
shafts,
etc.)
to
be
sure
the
pro-
duct
is
safe
to
operate
without
danger
of
electrical
shock.
Do
not
use
a
line
isolation
transformer
during
this
check.
e
Plug
the
AC
line
cord
directly
into
the
AC
outlet.
Using
a
‘‘Leakage
Current
Tester’’,
measure
the
leakage
current
from
each
exposed
metal
part
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
0.5
mA
AC
(r.m.s.).
e
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
1,500
2
10
W
resistor
paralleled
by
a
0.15
pF
AC-type
capacitor
between
an
exposed
metal
part
and
a
known
good
earth
ground.
‘
;
AC
VOLT
Measure
the
AC
voltage
across
the
resistor
with
the
AC
fa
eng
haa
voltmeter.
or
more
sensitivity.)
Move
the
resistor
connection
to
each
exposed
metal
part,
particularly
any
exposed
metal
part
having
a
return
path
to
the
chassis,
and
measure
the
AC
voltage
across
Baa
gy
O-
0.15
uF
AC
TYPE
the
resistor.
Now,
reverse
the
plug
in
the
AC
outlet
and
pe
dae
:
,
Place
this
probe
repeat
each
measurement.
Any
voltage
measured
must
t
rere
peracetic
not
exceed
0.75
V
AC
(r.m.s.).
TEGO
TO
aN
rae
art
This
corresponds
to
0.5
mA
AC
(r.m.s.).
Good
earth
ground
Warning
Please
note
that,
as
a
safety
precaution,
the
wirings
of
the
power
supply
sections
of
RC-X3
and
RC-X3
B/G
are
different,
as
shown
in
the
illustration.
PUT
WIRES
INTO
RIB
BONDING
NOT
TO
FLOAT
RC-X3
B/G
(No.
1755)
3
RC-X3
B/E/G
|
Features
1.
Portable
system
incorporating
multi-function
CD
player.
¢
CD
player
with
program
play
of
up
to
20
tunes/repeat
play/random
play/intro
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).
¢
Metal
and
CrO2
tape
can
be
played
back,
for
superior
tone
quality.
Specifications
Compact
disc
player
section
Type
Signal
detection
system
Number
of
channels
Frequency
response
Signal-to-noise
ratio
Wow
&
flutter
Radio
section
Frequency
ranges
Antennas
Tape
deck
section
Track
system
Motor
Heads
Frequency
response
Signal-to-noise
ratio
Wow
&
flutter
Fast
wind
time
(No.
1755)
:
Compact
disc
player
:
Non-contact
optical
pickup
(semiconductor
laser)
:
2
channels
(stereo)
:
20
Hz~
20,000
Hz
:
76
dB
:
Less
than
measurable
limit
>FM
88—108
MHz
SW
6—18
MHz
MW
540—1600
kHz
LW
150—350
kHz
(B/E)
150—280
kHz
(G)
:
Telescopic
antenna
for
FM
&
SW
Ferrite
core
antenna
for
MW
&
LW
:
4-track
2-channel
stereo
:
Electronic
governor
DC
motor
for
capstan
:
Deck
A;
Hard
permalloy
head
for
recording/playback,
2
gap
ferrite
head
for
erasure
Deck
B;
Hard
permalloy
head
for
playback
:
60
Hz—
14,000
Hz
(with
normal
tape)
:
49
dB
(weighted,
at
1
kHz)
:
0.11%
(WRMS)
:
Approx.
120
sec
(C-60
cassette)
e
Synchro
start
dubbing
function
(normal/high
speed
dubbing).
e
Relay
playback
(from
Deck
B
to
Deck
A).
¢
Microphone
mixing
facility
during
tape
playback.
¢
Full
auto-stop
mechanism.
.
Automatic
level
loudness
control.
¢
Dynamic
sound
reproduction
of
low
level
sound.
®
Clear
sound
reproduction
with
less
distortion
at
high
outputs.
.
CD
OUT
jacks.
General
Speakers
Input
terminal
Output
terminals
DIN
socket
(RC-X3
G)
Power
output
Power
sources
(RC-X3
E
only)
Power
consumption
Dimensions
Weight
Accessory
provided
:
12
cm
(4-3/4’’)
full
range
x
2
(3
Q)
:
MIC
x
1
(Min.
Input
level:
3
mV
(—50
dBv)
Matching
impedance:
200
2—2
kQ)
:
CD
OUT
x
2
(1.0
V/4.3
kQ)
PHONES
x
1
(Output
level:
O—40
mW/32
Q,
Matching
impedance:
8
2—1
kQ)
:
Min.
input
level;
0.6
mV/kQ
Input
impedance;
9
kQ
Output
level;
500
mV
Output
impedance;
6
k2
:16W
(8
W+8
W)
at
3
Q
(Max.)
10
W
(5W+5W)
at
32
(10%
THD)
:
AC
220—240
V/110—120V,
50/60
Hz
DC
12
V
(‘’R20”'
cells
x
8)
>
Ext.
DC
IN12
V
(car
battery
via
optional
CN-332
car
adapter)
:
27
watts
:
591(W)
x
181(H)
x
228(D)
mm
:
Approx.
4.9
kg
without
batteries
:
AC
power
cord
Design
and
specifications
are
subject
to
change
without
notice.
|
RC-X3
B/E/G
5]
Names
of
Control
and
Their
Functions
@2)
Seen
em
————D
IMTTINTTNN
|
ITE
|
REEBEILOSESEER
/
sees
%
|
BERBERS
Fig.
5-1
Disc
holder
Open
button
(Disk
holder)
Display
window
(CD
player
section)
CD
operation
buttons
POWER
switch
TAPE
(PLAY)
switch
Set
this
switch
according
to
the
type
of
tape
to
be
used.
METAL/CrOz2:
(playback
only)
Set
to
this
position
to
listen
to
a
metal
(type
IV)
or
chrome
(type
Il)
tape.
NORMAL:
Set
to
this
position
to
listen
to
a
normal
(type
|)
tape.
FUNCTION
switch
TAPE/DUBBING
e
NORMAL
SPEED:
¢
HIGH
SPEED:
Set
to
NORMAL
SPEED
when
listening
to
a
cassette
or
recording
from
the
external
microphone;
also
set
to
this
position
when
dubbing
at
normal
speed.
Set
to
HIGH
SPEED
when
dubbing
at
high-speed.
Set
to
this
position
when
listening
to
or
recording
from
the
radio.
[CD
]
(RC-X3
B/E)
Set
to
this
position
when
recording
from
or
listening
to
a
CD.
:
CD/DIN
|
(RC-X3
G
only)
Set
to
this
position
when
recording
from
or
listening
to
a
CD
player
or
a
unit
connected
to
the
DIN
jack
on
the
rear
panel.
If
the
CD
player
and
a
unit
connected
to
the
DIN
jack
are
both
playing,
and
the
FUNCTION
switch
is
set
to
CD/DIN,
their
output
sound
will
be
mixed.
TONE
control
VOLUME
control
FM
MODE
switch
STEREO:
Set
to
this
position
when
receiving
FM
stereo
broadcasts.
MONO:
Set
to
this
position
when
FM
stereo
reception
is
obscured
by
noise.
FINE
TUNING
knob
BAND
(LW/MW/SW/FM)
switch
Dial
scale
POWER
indicator
Headphones
jack
(PHONES)
(3.5
mm
dia.
stereo
mini)
Connect
headphones
(impedance
8
Q—1
kQ)
to
this
jack.
The
speakers
are
automatically
switched
off
when
headphones
are
connected.
oO
(2)
(3)
(4)
5)
6)
@
QOS)
GOO)
=
(RC-X3G
only)
(RC-X3E
only)
Cassette
holder
(Deck
A)
Cassette
operation
buttons
(Deck
A)
©
REC:
Press
this
button
to
start
recording.
m
PLAY:
Press
to
play
to
tape.
“@4REW:
Press
to
rewind
the
tape
rapidly.
mr
FF:
Press
to
wind
the
tape
forward
rapidly.
B
/&
STOP/EJECT:
Press
to
stop
the
tape.
Pressing
this
button
when
the
tape
is
stopped
opens
the
cassette
holder.
HE
PAUSE:
Press
to
stop
the
tape
temporarily.
Press
again
to
release
the
pause
mode.
Cassette
operation
buttons
(Deck
B)
>
PLAY:
Press
to
play
the
tape.
“<4
REW:
Press
to
rewind
the
tape
rapidly.
bP
rr:
Press
to
wind
the
tape
forward
rapidly.
@
/4
STOP/EJECT:
Press
to
stop
the
tape.
Pressing
this
button
when
the
tape
is
stopped
opens
the
cassette
holder.
(19)
Cassette
holder
(Deck
B)
@0)
TUNING
knob
Q1)
Telescopic
antenna
for
FM
and
SW
@2)
CD
OUT
jacks
Connect
to
another
stereo
amplifier,
etc.
to
listen
to
the
CD
sound
from
other
equipment.
3)
MIX
MIC
jack
(3.5
mm
dia.
mini)
When
recording
or
mixing
using
a
microphone,
connect
the
microphone
(with
an
impedance
of
200
Q
to
2
kQ)
to
this
jack.
The
microphone
sound
is
recorded
mo-
naurally.
Battery
compartment
cover
DIN
jack
(REC/PB)
(RC-X3
G
only)
BEAT
CUT
switch
(See
page
)
DC
IN
12
V
jack
(
~-®-+
_
)
(RC-X3
E
only)
VOLTAGE
SELECTOR/AC
IN
(AC
input)
jack
Qe)
24)
25)
26)
@7)
28)
(No.
1755)
5
RC-X3
B/E/G
|
6
16]
Location
of
Main
Parts
Tuner
Board
Ass’y
CD
Mechanism
Assy
Amplifier
Board
Ass‘y
Speaker
Cassette
Mechanism
Ass‘y
Fig.
6-1
Amplifier
Board
Ass’y
CD
Mechanism
Ass’y
Tuner
Board
Assy
Fig.
6-2
Power
Supply
Board
Ass’y
AC
Jack
Antenna
Terminal
THE
HE
HEH
Power
Trans.
DC
IN
Jack
DIN
Jack
(RC-X3G
only)
Fig.
6-3
(No.
1755)
RC-X3
B/E/G
Removal
of
Main
Parts
B
Rear
Cabinet
Ass’y
1.
Remove
the
ten
screws
Qa),
(2)
and
G3),
(4)
and
(6)
retaining
the
Rear
Cabinet
Ass’y.
.
Pull
off
the
Rear
Cabinet
Ass’y
from
the
Front
Cabinet
Ass’y.
.
Remove
the
Connector
(CN901)
and
the
Antenna
ter-
minal
(TP1)
from
Amplifier
and
Tuner
Boards.
BCD
Unit
Ass’y
1.
Remove
two
screws
6)
and
@
retaining
both
Cassette
door.
(Fig.
7-2)
.
Remove
two
screws
retaining
both
cassette
door,
(Fig.
7-3).
.
Push
CN-1
connector
and
remove
two
wires
from
Tuner
Board
Ass’y,
and
Amplifier
Board
Ass’‘y.
.
Pull
CD
unit
forward
to
front.
.
Remove
four
screws
@)
and
retaining
CD
Control
Circuit
Board
Ass’y.
(Fig.
7-3)
*
Be
careful
not
to
touch
or
exert
excessive
pressure
on
the
pickup
section.
HCD
Mechanism
Ass‘y
1
3.
.
Remove
CD
unit
from
Front
Cabinet
Ass’y
2.
Remove
four
screws
(9)
and
retaining
CD
Con-
trol
Circuit
Board
Ass’y.
(Fig.
7-3)
Remove
four
screws
27)
}
retaining
CD
Mechanism.
(Fig.
7-4)
@
Tuner
Board
Ass’y
(Fig.
7-3)
1.
2.
p
Remove
tuning
knob.
Remove
two
screws
a3
retaining
front
cabinet
ass’y.
>
.
Pull
out
tuner
board
ass’y.
.
Remove
the
earth
wire.
.
Remove
four
screws
a1)
and
a2
retaining
tuner
chassis.
Fig.
7-4
(No.
1755)
7
RC-X3
B/E/G
H
Amplifier
Board
Ass’y
(Fig.
7-5)
1.
Remove
three
knobs
(power,
tape
select,
function)
retaining
unit.
2.
Remove
three
screws
and
a5)
retaining
front
cabinet
ass’y.
3.
Remove
two
screws
and
a?
retaining
front
cabinet.
4.
Remove
two
connectors
CN-701
and
CN702
from
amplifier
board
ass’y.
--
Warning
When
replacing
heads,
be
sure
to
turn
the
head
wires
of
the
A
and
B
mechanisms
two
turns
to
the
right
before
wiring.
@
Mechanism
Ass’y
1.
Remove
three
screws
and
retaining
Mechanism
B.
(Fig.
7-6)
2.
Remove
two
screws
20
and
21)
retaining
Mechanism
B.
(Fig.
7-7)
3.
Remove
two
screws
Q2)
retaining
Mechanism
A.
(Fig.
7-8)
@
Speaker
Unit
1.
Remove
the
CD
unit
Ass’y
and
the
Tuner
Board
Ass’y
and
the
Amplifier
Board
Ass’y.
2.
Next,
remove
eight
screws
retaining
Front
Cabinet.
@
Power
Supply
Board
Ass’y
(Fig.
7-9)
1.
Remove
two
screws
5)
retaining
power
trans.
2.
Next,
remove
three
screws
6)
retaining
AC
Socket.
8
(No.
1755)
@
CD
Mechanism
Section
ick
up
Board
CD
mechanism
Ass’y
Fig.
7-12
RC-X3
B/E/G
1.
Remove
one
screw
Q)
retaining
Gear.
2.
Remove
the
Gear.
3.
Remove
the
shaft
stopper.
4.
Pull
up
the
pick
up
Ass’y
and
remove
the
Connector.
Pick
up
replacement
can
be
done
without
any
adjustments.
Parts
No.
KSS-150B
(H)-RS
*
To
lessen
the
effects
of
static
electricity,
the
above
part
has
a
soldered
bridge.
Remove
this
soldered
bridge
before
using
the
part.
Soldered
bridge
Pick
up
Board
Pattern
side
Fig.
7-13
Part
No.
KSM-150B-AJRS
(No.
1755)
9
RC-X3
B/E/G
Hi
Location
of
Machanism
Parts
Rewind/F.
Forward
Clutch
Ass’y
Rewind/F.Forward
Clutch
Ass‘y
Front
Section
Erase
head
R/P
Head
Pinch
Roller
Ass’y
P.B
Head
Pinch
Roller
Ass’y
Fig.
7-14
Motor
Rear
Section
‘
Flywheel
Ass’y
Flywheel
Ass’y
Fig.
7-15
@
Motor
bracket
(Recording/playback
deck)
1)
Remove
the
three
screws
q).
2)
Remove
the
chassis
and
Motor
bracket
from
the
button
side.
Then
remove
the
bracket
arm
(panel).
(The
synchro
arm
can
be
removed
from
the
pause
lock.
Return
the
pause
lock
after
it
is
removed
from
the
pro-
per
position.}
M@
Head
section
Fig.
7-16
1)
Remove
the
record/playback
head’s
mounting
screw
(2)
and
loosen
screw
(3).
2)
Remove
the
erase
head
mounting
screw
(4)
and
G).
@
Pinch
roller
1)
Remove
the
pinch
roller
arm
stopper
(6).
Rec
Play
Rew
FF
Stop
Pause
@
Fiywheel
ass’y
Eject
1)
Remove
the
C
washer
@
securing
the
capstan
shaft.
Fig
949
ig.
7-
2)
Pull
out
the
flywheel
ass‘y.
ss
10
(No.
1755)
RC-X3
B/E/G
H@
Removal
of
the
button
ass’y
from
the
mechanical
chassis.
e
Removing
the
leaf
switch
To
remove
the
leaf
switch
(Play)
attached
to
the
mechanism
assembly,
insert
a
small
tweezers
or
similar
instrument
between
the
chassis
guide
section
and
the
hooks
and
simultaneously
release
the
hooks.
Then
pull
up
the
leaf
switch.
Caution
Hooks
¢
Removing
only
one
hook
could
damage
the
leaf
switch.
Insert
the
tweezers
between
the
chassis
guide
and
the
hooks
and
remove
the
hooks
simultaneously.
Fig.
7-18
©
Gear
(Below
the
flywheel)
ee
Remove
the
C
washer
a)
securing
the
gear.
pss
on
:
:
Gear
|
RF
crutch
ass’y
For
reassembly,
insert
the
Sensing
Lever
arm
stand
into
;
|
the
(4)
section.
—/—
:-—__}
*
Lock
arm
Press
the
arm
stopper
from
window
3),
and
pull
to
remove.
¢
Chassis
removal
1)
Remove
the
three
6), 6),
and
@
springs.
2)
Remove
the
two
screws
3)
Remove
the
two
screws
(8)
securing
the
capstan
metal.
4)
Gently
remove
the
button
ass’y
from
the
chassis.
/
i
/
Small
dia
wee
dia
Leaf
Stopper
switch
Fig.
7-19
®
Fig.
7-20
(No.
1755)
11
RC-X3
B/E/G
|
Main
Adjustment
and
Level
Check
=
Amplifier
adjustments
Conditions
Power
supply
voltages
:
AC
110~
120/220
~
240
V
DIN
OUT
500
mV
(-3.8
dBs)/47
kQ
DC
12
V
(from
battery)
...G
version
only
Input
levels
:
CD
OUT
—11
dBs
Headphones
—
11
dBs=0.215
V/32
Q
EXT
MIC
—8
dBs
Tone
controls:
High
DIN
IN
—8
dB
Tape
select
:
Normal
Output
levels
:
Speaker
0
dBs
=0.775
V/3
2
Tapes
used
:
Recording
normal
tape
TS-8
(UR)
CD
OUT
1.0
V(+2
dBs)/47
kQ
chrome
tape
TS-6
metal
tape
TS-7
Item
Tape
used
Adjustment/check
method
Condition
Adjustment
location
Head
azimuth
|VTT703
Playback
the
VTT703
test
tape
for
both
A
and
|
Tape/normal
Left side
screw
of
adjustment
(10
kHz)
B
decks
and
adjust
the
screw
in
front
of
the
head
|
speed
PB
or
R/P
Head
for
the
tape
running
direction
so
that
the
minimum
phase
difference
is
within
2
dB
of
peak.
zl
4
Tape
speed
VTT712
Playback
the
B
deck
at
the
position
where
test
|
Tape/Normal
VR851
adjustment
(3
kHz)
tape
VTT712
has
ended
and
adjust
VR85
so
that
|
speed
the
speed
meter
value
is
within
3000+10
Hz.
Play
the
VT712
to
the
end
position
and
confirm
|
High
Speed
Confirming
that
between
5150
and
5500
Hz
are
obtained
with
the
B
deck
in
the
Playback
condition
and
the
A
deck
in
record
condition.
Checking
wow
|
VTT712
Playback
the
VTT712
test
tape
with
A
and
B
|
Tape/Normal
Confirming
&
flutter
(3
kHz)
decks
and
confirm
that
the
wow
&
flutter
value
|
speed
is
less
than
0.35%
of
JIS,
RMS.
Playback
VTT724
Playback
the
VTT724
test
tape
and
confirm
that
|
Tape/Normal
output
level
(1
kHz)
Line-out
is
~8
dBs+3
dB.
Also
make
sure
at
this
time
that
the
L.R.
deviation
is
within
1.5 dB.
Confirming
VTT739
With
respect
to
their
outputs
at
1
kHz,
the
out-
|
Deck
B
playback
puts
at
Speaker
Terminal
(add
dummy
resistor
of
|
playback
frequency
3
2)
should
be
11+
4
dB
at
63
Hz,
and
3
+
4
dB
|
Tape/Normal
characteristics
at
10
kHz.
(The
Chrom/Metal
Position
should
be
—4
dB+2
dB
in
response
to
normal
tape.)
Recording
bias
|
(TS-8)
|
Set
beat
cut
switch
$271
to
position
1
and
ad-|S721
(Beat
cut)
|L721
frequency
Normal
tape
|
just
the
oscillating
frequency
to
68
+
1
kHz
with!
1
:
68
kHz
L721.
(Connect
a
1
MQ
resistor
in
series
when
|
2
:
66
kHz
measuring.)
3:
70
kHz
Rec/Play
(TS-8)
With
respect
to
their
CD
OUT
at
1
kHz
—
20
dB|Deck
B
During
repairs,
if
the
frequency
Normal
tape
|
Confirmate
output
level
9+4
dB
(Rec/PB)
at
R727
resistance
is
characteristics
100
Hz,
and
344
dB
at
10
kHz
cut,
10
kHz
will
rise.
If
the
R726
resistance
is
|
cut,
10
kHz
will
fall.
Dubbing
check
|
(TS-8)
Regarding
the
outputs
at
1
kHz,
insert
a
VTT739
Normal
tape
|
test
tape
for
the
output
at
mechanism
A
and
a
VTT739
TS-8
Normal
Tape
for
the
output
at
mechanism
B
and
carry
out
according
to
the
hi-speed
dubb-
ing
order.
With
1
kHz
as
standard,
the
output
should
be
+
12+4
dB
at
63
kHz
and
+344
dB
at
10
kHz.
@
Tuner
Section
Basic
Conditions:
Power
Source
of
the
Receiver
:
DC
12V
or
AC
120
V
Tuner
Section
:
6.85
V
Load
Resistance
of
the
Receiver
:
5bO
mW
(0.39
V)/3
2
Modulation
of
SSG
:
AM
—
400
Hz,
30%
FM
—
400
Hz
22.5
kHz
Devi.
12
(No.
1755)
RC-X3
B/E/G
#
Location
of
Adjustment
Bias
Adj.
Recording
Bias
Frequency
Adj.
Motor
Speed
Adj.
Function
Switch
Power
Switch
R/P
Switch
Volume
Tape
Select
Switch
Tone
Volume
Fig.
8-1
OTP]
Ole
O}|rtce
L2
$1
or
reptile
58
VR}
7
fe
QO!
Q
7}
TP5
LD
ak
eee
©
Oh?
IS
3
MBLRG
TC]
TC5
1C7
C3
TPT,
T2
TP8
Dummy
Antenna
Loop
Antenna
F
a
ES
aN
esG
Loop
Antenna
Bl
Re
|
o>
Bar
ANT
60cm
P|
FM:
Ri
+
R2
=
752,C
=0
Ri:
Output
impedance
of
S.S.G.
SW:
Ri
+
R2
=
802
Cae
Fig.
8-3
(No.
1755)
13
RC-X3
B/E/G
@
Tuner
Alignment
Item
Description
1.
AM
IF
ALIGNMENT
1-1
(1)
2-1
(1)
(2)
(3)
(4)
(5)
2-2
(1)
(2)
2.
FM
IF
ALIGNMENT
Conditions
of
the
receiver
Power
source:
Function
switch
position:
Band
select
switch:
Volume
control:
Variable
capacitor:
Connection
of
Sweeper
and
the
receiver
Tuner
input:
Tuner
output:
Aligning
position:
Alignment
(Waveform):
Conditions
of
the
receiver
Power
source:
Function
switch
position:
Band
select
switch:
Volume
control:
Variable
capacitor:
Connection
of
Sweeper
and
the
receiver
Tuner
input:
Tuner
output:
Since
AMIF
on
this
set
is
non-aligning,
alignment
of
AMIF
should
not
be
carried
out
as
a
rule.
When
alignment
is
necessary
after
repairs,
for
example,
follow
the
steps
outlined
below.
DC
6.85
V
(When
the
power
is
supplied
directly
to
the
tuner
in
the
receiver,
the
voltage
should
be
adjusted
to
the
pro-
per
jevel
which
shall
be
required
by
the
tuner.)
RADIO
AM
Minimum
gain
position
Near
the
minimum
capacity
position
where
no
signal
comes
in.
Positive
side
to
TP3
Positive
side
to
TP6
(IF
out)
Negative
side
to
TP7
(GND)
T3
Adjust
AM
I.F.T.
(above
mentioned
aligning
position)
so
that
maximum
and
symmetrical
waveform
can
be
obtained.
In
this
case,
the
wavehead
should
be
appeared
at
the
center
marker
(450
kHz)
on
the
scope
of
Sweeper.
Since
FMIF
on
this
set
is
aligning,
alignment
of
FMIF
should
not
be
carried
out
as
a
rule.
When
alignment
is
necessary
after
repairs,
for
example,
follow
the
steps
outlined
below.
Same
as
mentioned
in
item
1-1
RADIO
FM
Minimum
gain
position
Near
the
minimum
capacity
position
where
no
signal
comes
in.
Positive
side
to
TP5
Positive
side
to
TP6
(IF
out)
Negative
side
to
TP7
(GND)
Note:
a)
Attach
a
capacitor
(30
pF)
and
a
resistor
(30
kQ)
to
the
positive
side
cable
which
shall
be
led
from
Sweeper
3-1
(1)
(2)
(3)
3-2
(1)
(2)
(3)
3-3
3-4
output.
Attach
a
resistor
(100
kQ)
in
series
to
the
positive
side
cable
which
shall
be
led
from
Sweeper
iutput.
3.
AM
RF
ALIGNMENT
Conditions
of
the
receiver.
Power
source:
Volume
control:
Variable
capacitor:
Conditions
of
SSG.
Modulation:
Frequency:
Output
level
of
the
attenuator
in
SSG:
Power
output
measuring
position:
Alignment:
Same
as
mentioned
in
item
1-1.
maximum
Refer
to
the
following
list
shown
in
item
3-3.
Refer
to
the
basic
condition
Refer
to
the
following
list
shown
in
item
3-3.
Approx.
50
mW
Speaker
terminals
14
(No.
1755)
RC-X3
B/E/G
Band
Select
ae
of
Antenna
to
be
Frequency
of
SSG
Variable
Capacitor
Position
Adjusting
Switch
Position
attached
to
SSG
Position
360
kHz
(290
Hz
P
:
G
Version
only)
Min.
capacity
TC-3
5
360
kHz
(290
Hz
to
be
received
360
kHz
G
Version
only)
(290
kHz
RC-X3G
only)
6
Adjust
the
above
aligning
position
(L4
&
TC-4)
repeatedly
so
that
the
tuner
can
be
obtained
the
best
sensitivity.
7
520
kHz
Max.
capacity
>|
mw
|
tow
anana
|
Ain
sr
ig
in
8
8
Tain
10
600
kHz
to
be
received
600
kHz
L6
11
1400
kHz
to
be
received
1400
kHz
TC-6
12
Adjust
the
above
aligning
position
(L6
&
TC-6)
repeatedly
so
that
the
tuner
can
be
obtained
the
best
sensitivity.
13
5.8
MHz
Max.
capacity
L7
14
|
18.6
MHz
Min.
capacity
TC-7
15
SW
Dummy
Adjust
the
above
aligning
position
(L7
&
TC-7)
repeatedly
so
that
Antenna
the
tuner
can
be
received
above
frequency
range
(band
width).
v6
6.0
MHz
7
18.0
MHz
18
Adjust
the
above
aligning
position
(L8
&
TC-8)
repeatedly
so
that
the
tuner
can
be
obtained
the
best
sensitivity.
FM
RF
Adjustment
(1)
Power
source:
Same
as
mentioned
in
item
1.
(2)
Function
switch
position:
TUNER
(3)
Band
select
switch:
FM
(4)
Volume
control:
50
mw
(5)
Variable
capacitor:
Refer
the
following
list
shown
in
item
FM
Tracking
Adj.
(6)
Modulation:
Refer
the
basic
condition
(7)
Frequency:
Refer
the
following
list
shown
in
item
FM
Tracking
Adj.
(8)
Output
level
of
the
attenuator
in
FM
SSG:
The
level
shall
be
decided
by
the
load
resistance
of
the
receiver
mentioned
in
the
basic
conditions.
@
FM
Tracking
Adjustment
Sort
of
Antenna
to
be
attached
to
SSG
Band
Select
Switch
Position
Adjusting
Position
87.5
MHz
dare
me
2
only!
109.0
MHz
(108.34
. j
sae
we
e
only)
Ajust
the
above
aligning
position
(L1
&
TC-1)
repeatedly
so
that
the
tuner
can
be
received
above
frequency
range
(band
width).
90
MHz
to
be
received
90
MHz
Ea
ead
106
MHz
to
be
received
106
MHz
Adjust
the
above
aligning
position
(L2
&
TC-2)
repeatedly
so
that
the
tuner
can
be
obtained
the
best
sensitivity.
Frequency
of
SSG
Variable
Capacitor
Position
Dummy
Antenna
@
FM
MPX
ALIGNMENT
(1)
Input
Position
:
TP-1
(ANTENNA)
TP-2
(GND)
(2)
Input
Frequency
:
98
MHz
(60
dB
Non
Modulation)
{3)
Alignment
method
:
Connect
TP-3
to
the
plus
side
of
the
frequency
counter
and
TP-7
to
the
ground
side
of
the
fre-
quency
counter
and
then
use
VR-1
to
align
to
19
kHz+100
Hz.
After
inserting
100
kQ
in
the
series
and
using
a
voltmeter
to
amplify,
input
to
the
frequency
counter.
(No.
1755)
15
RC-X3
B/E/G
m@
CD
Player
Adjustment
Fromt
VRSO3
VCO
Adj
TRACKING
Gm.
em
nee
ne
ee
ee
Gain
Adj
evrso5
VRSO!
Tracking
Error
(Offset)
Adj
Fig.
8-4
CD
Unit
A
‘‘CD
unit’
is
an
Ass'y
combination
of
the
CD
mechanism
(KSM-150BA-A
part
no.
KSM-150B-AJRS)
and
the
CD
board
(VMW
1176).
Service
personnel!
call
this
Ass’y
a
CD
unit.
(1)
When
a
stable
DC
power
source
is
used,
connect
the
GND
of
FW4
(6)
and
FW4
(2);
(2)
The
audio
output’s
load
resistance
is
47
kQ.
Monitoring
from
the
CD
OUT
terminal
is
also
possible.
(3)
When
a
disc
is
to
be
inserted,
first
remove
the
set’s
magnet
clamper.
(4)
Short
circuit
the
S609
OPEN/CLOSE
switch.
When
CN601
GQ)
@)
are
shorted,
TOC
reading
will
begin.
Adjustment
procedure
(1)
VCO
free
run
adjustment
(IF
VCO
free
run
adjustment
is
improper,
TOC
cannot
be
read.)
@
Adjustment
tool:
Frequency
counter
1)
Short
circuit
have
TP7
(IC501
6)
terminal
=
ASY)
and
TP6
(D-GND).
2)
Connect
TP5
(IC503
terminal
=PLCK)
to
the
frequency
counter’s
hot
lead,
and
TP6
to
GND.
3)
Adjust
VR503
to
4450+10
kHz.
(2)
Tracking
offset
adjustment
@
Adjustment
toois:
Oscilloscope
and
a
normal
disc
1)
Connect
a
MA165
diode
to
either
TP13
[pin
2)
of
IC506
(CPU)]
or
TP12
[Pin
63)
of
IC506).
2)
Connect
TP3
(IC501
20)
terminal
=
TE)
to
the
oscilloscope’s
hot
lead,
and
TP2
to
GND.
3)
Playback
a
normal
disc.
4)
Connect
TP4
(IC502
(3)
terminal
=TE)
and
TP2
(IC501
terminal
=
VR).
5)
Adjust
VR501
so
the
DC
level
of
the
tracking
error
signal
(oscilloscope
waveform)
becomes
zero.
Note:
Adjust
VR501
so
that
the
top
and
bottom
are
symmetric
while
the
waveform
is
at
the
zero
level.
The
oscilloscope
is
to
be
a
DC
combination.
___If
HLM
UTI
LA
NI
Adjust
the
center
of
P-P
until
it
|
WV
|
ii!
iI
|
itl
becomes
DC
level
0.
Fig.
8-5
16
(No.
1755)
)
Playback
a
normal
ee
)
Connect
TPA
(Ic502
@)
Oi
“Adjust
the
center
of
P-Pu
1
becomes
DC
level
0.
RC-X3
B/E/G
(3)
Tracking
gain
adjustment
Hi
Adjustment
tools:
2-needle
vacuum
tube
voltmeter,
oscillator,
measuring
jig,
normal
disc
1)
There
is
a
pattern
cut
round
between
TP3
(IC501
0
terminal)
and
TP10
R613.
Remove
the
solder
and
connect
the
measuring
jig
to
both
ends.
Cut
Round
2)
Set
the
oscillator’s
output
at
1.1
kHz,
180
mVRMS.
sae
3)
Playback
a
normal
disc.
[tPs@
Lp
3
4)
Adjust
VR505
so
that
it
matches
the
output
level
of
the
measuring
jig.
R613
If
proper
adjustment
cannot
be
made
(with
the
jig
or
measuring
instrument,
etc.),
center
VR505
mechanically.
CD
pickup
maintenance
(1)
Check
the
service
life
of
the
laser
diode.
Pickup
replacement
procedure.
a.
Insert
the
disc
and
turn
on
the
power.
b.
Press
the
PLAY
button
(S601)
to
playback
a
track.
Set
to
unit
mode,
and
check
if
the
power
is
not
on.
c.
Use
an
oscilloscope
to
measure
the
RF
output.
If
it
is
0.6
VP-P
or
lower,
wipe
the
objective
lens
with
a
cotton
swab.
Do
the
measurement
again.
If
the
RF
output
is
Remove
the
CD
mechanism
from
the
CD
board.
0.6
VP-P
or
lower,
the
laser
diode
needs
to
be
replaced.
=
Replace
tt
wen
Replacing
she
pienie:
Loosen
the
screws
securing
the
pickup
holder
and
shaft,
d.
If
the
RF
output
is
higher
than
the
above
values,
measure
and
remove
the
old
pickup
the
voltage
of
both
ends
of
R507
(10
2)
mounted
on
the
L_
:
board.
If
it
is
1.2
V
or
higher,
replace
the
pickup.
|
*
To
obtain
a
diagnosis,
do
steps
c
and
d.
Remove
the
solder
from
the
pickup
board's
laser
protec-
tion
short
land.
(2)
Semi-fixed
resistor
on
the
APC
board
ae
The
semi-fixed
resistor
on
the
APC
board
mounted
on
the
pickup
is
for
adjusting
the
laser
power.
This
adjust-
Mount
a
new
pickup,
and
connect
the
connector
secure-
ment
is
done
in
pairs
according
to
the
optical
block
ly.
Then
mount
the
CD
mechanism
on
the
CD
board.
characteristics.
Therefore,
do
not
touch
the
semi-fixed
|
resistor.
Turn
on
the
power
without
inserting
a
disc.
When
the
laser
emits,
check
if
the
lens
is
able
to
move
up
and
down.
(Caution:
Do
not
look
at
the
laser
directly.)
ae
Do
VCO
free
run
adjustment.
If
the
laser
power
is
low,
it
is
due
to
the
laser
diode.
Pickup
replacement
will
be
necessary.
If
a
semi-fixed
resistor
of
a
normal
pickup
is
turned,
the
pickup
may
be
damaged
due
to
excessive
voltage.
(3)
Grading
adjustment
Grading
adjustment
is
done
part-by-part
to
obtain
the
best
adjustment.
Ey
If
the
adjustment
is
off,
playback
will
be
impossible
Preset
VR501
and
VR505,
which
are
for
tracking
adjust-
because
the
laser
beam
will
go
to
incorrect
tracks.
ment,
to
the
center
position.
Playback
the
disc,
and
check
if
the
disc
spins
properly.
Sn
Do
tracking
offset
adjustment.
Do
tracking
gain
adjustment.
Are
PLAY
and
SKIP
operations\_NO
working
properly?
Refer
to
the
repair
guide.
YES
Replacement
is
complete
(No.
1755)
17
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Table of contents
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