JVC RC-X3 User manual

RC-X3
B/E/G
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DIGITAL AUDIO
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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
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| 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)