JVC AX-V4BK User manual

AX-V4BK
Beebe
Seon ane
“AX-V4BK
Area Suffix
Bs .... theU.K
EF .... Continental Europe Except
Germany & italy
EN .... Nordic Countries
G Germany
GI .... Italy
UB .... Hong Kong
US .... Singapore
UT .... Taiwan
Universal Except All of
Above
COMPU LINK
iifRemote ill
Control Component
Contents
Safety Precautions ..............00 00s evens 1-2 Adjustment Procedures ................... 1-23
Instruction Book .........000.000 000 cee enee 1-3 Block Diagrams ......................05- 1-24
Description of Major ICs ...............4. 1-13 Schematic Diagrams ...................4: 1-25
Internal Connection of FL Display ........ 1-19 Printed Circuit Boards ................... 1-28
Disasssembly
Proceduers
..............--.
1-20
Ports
List
=
©
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sda
end
eb
eds
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Ba
2-1
No.20585
May. 1996

AX-V4BK
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.).
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 1,500Q 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 Ee ae
repeat each measurement. Any voltage back exposed
measured must not exceed 0.75 V AC (r.m.s.). 15002 10W metal part.
This corresponds to 0.5mA AC (r.m.s.). Good earth ground
Warning
. 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
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.

e-4
Table of Contents
— eee
Page I
Getthing: Started: ccccsssncascencnovecscnuussfococssoneshceoiesscounviesbceesecsobecaccobnlsvcsniscbcassssuorn
ee
Before Installation ...........escsssscsscsescsesssssssssnsssssssnsssssssseeseeses
Checking the Supplied Accessories
Switches, Buttons and Controls
Connecting the Speakers
Connecting Audio/Video Components
Connecting Audio Components for the COMPU LINK-3 Remote Control System
Power Supply through the AX-V4BK to a Connected Componen
Connecting the Power Cord .........essessscsecssssesessessscssssassnseneecesectee
Putting Batteries in the Remote Control
OOo CMH UMWN
Basic Operations .
Turning the Power On and Off
Selecting the Source to Play..
Selecting the Front Speakers .
Adjusting the Volume ........
Adjusting the Front Speaker Output Balance iI
Adjusting the Tone ..........scseseeseeene FI
Listening at Low Volume (Loudness)
Muting the Sound .
Recording a Source ..
Listening with Headphones
Using the Surround Processor ...ssssssssssssssscsesscssernssseeesseesnseesssacenecssesenessvees
Using JVC's Hall Surround .............cssseseee
Preparing for Dolby Surround
Using Dolby Surround
COMPU LINK Remote Control System ............. seb docraeboutoscace cassasenvsescorseceneenscessosenernsoeese oe AT
eee omen renrcnecnneceneceneenecnrneresennee AE
Using the Remote Control........-s:.rees» esinacteascorecbeniameeoeses adacnsetontcovsdsotcaty soseevenvenseneese eresreeeeee 1B
aarti reer emseese er anennernvenrensaterecereensenreterceessonseense 207
Troubleshooting wae 19
Specific ris ous ssesscivansssncsosecsbstbnscomssnesson osncesssescacoasscadcoss sabes vakcacasonasbaadevnstbsbsvecsdconsséacesteses 20
Getting Started
Before installation
This section explains how to connect stereo components and speakers to the AX- V4BK, and how to connect
the power supply.
General
* Be sure your hands are dry.
+ Tum the power off to all components.
* Read the manuals supplied with the components you are going to connect.
Locations
* Install the AX-V4BK in a location that js level and protected from moisture.
¢ The temperature around the AX-V4BK must be between 23° and 104° F (-5° and 40° C).
* Make sure there is good ventilation around the AX-V4BK. Poor ventilation could cause overheating and
damage the AX-V4BK.
Handling the AX-V4BK
* Do not insert any metal object into the AX-V4BK.
* Do not disassemble the AX-V4BK or remove screws, covers, or cabinct.
* Do not expose the AX-V4BK to rain or moisture.
Checking the Supplied Accessories
Check to be sure you have all of the following items, which are supplied with the AX-V4BK,
The number in the parentheses indicates quantity of the pieces supplied.
* Remote Control (1)
© Batteries (2)
* Mains Plug (only for the U.K.) (1)
If anything is missing. contact your dealer immediately.
Page 2
MavA-XV

vl
ne
Se
Switches,
Buttons
and
Controls
Become familiar with the buttons and controls on the AX-V4BK before use.
Front Panel
Remote sensor
PRO LOGIC indicator (15, 16)
3CH LOGIC indicator (15, 16)
HALL indicator (13)
Display (10)
MASTER VOLUME control (11)
LOUDNESS button (12)
Source selecting buttons (TUNER, TAPE, PHONO,
CD, VIDEO, VCR) (10)
POWER button and STANDBY indicator (10)
PHONES jack (12)
SPEAKERS 1/2 buttons (11)
BASS control (11)
TREBLE control (11)
BALANCE control (11)
SURROUND ON/OFF button (13, 15, 16)
SURROUND MODE button (13, 15, 16)
CENTER LEVEL/REAR LEVEL buttons (+/-) (16)
CENTER MODE button (15)
[9] DELAY button (15)
Refer to the pages in parentheses for details.
SERBRBRBEREEES Seeo8e8e8o
Page 3
Remote Control
Refer to the pages in parentheses for details.
[1] TV button (18)
2) Source selecting buttons (PHONO, VIDEO, TUNER, CD, TAPE,
VCR) (10, 18)
[3] TV/VCR CH buttons (+/-) (18)
[4] FADE MUTE button (12)
[5] POWER buttons (TV, VCR, AUDIO) (10, 18)
(6) 10 keys (18)
(7) CD-DISC button (18)
[8} Operating buttons for JVC audio/video components (18)
Surround adjustment buttons (13, 15, 16)
VOLUME buttons (+/-) (11)
Page 4
MaPA-XV

S-t
Connecting the Speakers
You can connect the following speakers:
* Two sets of front speakers to produce normal stereo sound
+ One set of rear speakers to enjoy the surround effect
* One center speaker to produce more effective surround effect (to make human voices outstanding)
For each speaker, connect one end of the speaker signal cable (not supplied) to the speaker terminal on the
4 rear panel and the other end to the speaker.
1. Open each terminal.
2. Insert the end of the speaker signal cabje as shown (be sure ¢o remove the insulation at the end
of each wire first).
3. Close the terminals to clamp the speaker signal cables firmly in place.
4, Connect the black (-) and red (+) terminals on the rear panel to the black (-) and red (+)
terminals marked on the speakers.
CAUTION:
Use speakers with the same impedance as marked near the terminals on the rear panel.
Connecting the front speakers
Connect the front speakers to the FRONT SPEAKERS terminals.
Right Sosakor
een, SO
(+)
Connecting the rear and center speakers
Connect rear speakers to the REAR SPEAKERS terminals and a center speaker to the CENTER SPEAKER
terminals.
oe)
Center speaker
Le ke Right ak FEAR
ef rear speaker ight rear speaker
Note:
When you connect rear speakers, make sure that both left and right speakers are connected, otherwise, no
sound will come out of the rear speakers.
Page 5
About the speaker impedance of the speakers
CAUTION:
When connecting speakers, use speakers with the same SPEAKER IMPEDANCE indicated by
the speaker terminals.
Notes:
* The required speaker impedance of the front speakers differs depending on whether or not a center and/
or rear speakers are connected af the same time. Since there four possible speaker connections with the
AX-V4BK, check which one fits your case and use the speaker with the impedance described below.
° The required speaker impedance of the front speakers does not differ depending on whether both the
FRONT SPEAKERS (and FRONT SPEAKERS (@ terminals are used or only one of them is used.
e733 When you connect only front speakers
When you connect front speakers and a center
speaker
Front
Speaker
ZS
©
Use front speakers with 4 — 16 ohm impedance. Use the following speakers;
+ Front speakers: 8 — 16 ohm impedance
* Center speaker: 8 — 16 ohm impedance
er
SI2k
When
you
connect
front
and
rear
speakers
|
CASE
4 |
When
you
connect
front
and
rear
speakers
as
well as a center speaker
Center Speaker
Use the following speakers;
* Front speakers: 8 — 16 ohm impedance
+ Rear speakers: 8 — 16 ohm impedance
Use the following speakers;
* Front speakers: 8 — 16 ohm impedance
+ Rear speakers: 8 — 16 ohm impedance
* Center speaker: 8 — 16 ohm impedance
Page 6
MavA-XV

Or}
Connecting Audio/Video Components
You can connect the following components to the AX-V4BK using cables with RCA pin plugs.
Audio Components
+ Turntable
Video Components
* VCR
* CD player « Video disc player
+ Cassette deck * TV
> Tuner —___
Notes:
* Both plugs and jacks are color-coded; the red ones are for right audio signals, the white ones for left audio
signals, and yellow ones for video signals.
+ Any turntables incorporating a small-output cartridge such as an MC (moving-coil type) must be connected
to the AX- V4BK through acommercial head amplifier or step-up transformer. Direct connection may result
in insufficient volume.
Audio component connections
To audio output wes
To audio output
To audio output
Ifa ground cable is provided
for your turntable, connect
the cable to the screw marked
GND on the rear panel. To audio outp
Video component connections
To video output
To video input
ES Fes ss |
Video disc slaiiet Tv
CAUTION:
Ifyou
connect
a
sound-increasing
device
such
as
a
graphic
equalizer
between
the
source
components
and
the
AX-V4BK,
the
sound
output
through
the
AX-V4BK
may
be
distorted.
Page 7
a
a
Connecting
Audio
Components
for
the
COMPU
LINK-3
Remote
Control
System
SK —SSSSSSSSSSSSSSSFSsseeSeSeseSFSSSSSSSSSSSSSSSSSSSsFFsseseeee
The COMPU LINK-3 remote control system allows you to control other JVC audio components from the
AX-VA4BK or vice versa. To use this system, connect your JVC audio components and the AX-V4BK with
the cable (monaural mini-plug) supplied with those components.
Hf your audio component has two COMPU LINK-3 SYNCHRO jacks, you can use either one.
If it has only one COMPU LINK-3 SYNCHRO jack, connect it so that it is the Last item in the series of
components. (for example, the turntable in the diagram below)
Notes:
+ The COMPU LINK-3 remote control system is the upgraded version of the COMPU LINK-] and COMPU
LINK-2. Even if your component has the COMPU LINK-1 or COMPU LINK-2 jacks, you can still connect
it in the COMPU LINK-3 remote control system, but some functions may not work correctly.
* For more information about the COMPU LINK-3 (-1 and -2) remote control system, see page 17.
Cassette deck
Power Supply through the AX-V4BK to a Connected Component
‘AC OUTLET You can use the AC outlet on the rear of the AX-V4BK to supply power to an audio component.
This AC outlet is a “switched” outlet. So when the AX-V4BK is off (that is, in standby mode), power is not
supplied through this outlet. By tuming the AX-V4BK on and off, you can turn the connected component on
and off at the same time.
Note:
Do not use the AC outlet on the rear of the AX-V4BK to supply power to the component in the COMPU LINK
: remote control system; otherwise, the COMPU LINK remote control system may not work tly.
For Continentat Europe 2 i is ntrol system may not work correctly.
AC OUTLET
CAUTION:
De not plug the component to the AC outlet on the rear if the maximum consumption is greater
than indicated by the AC outlet.
For the U.K.
Page 8
MavA-XV

Zl
A
a
ae
ce
Connecting
the
Power
Cord
a
ee
et,
Before plugging the AX-V4BK into an AC outlet, make sure that all connections have been made.
When the power cord is connected, the STANDBY indicator above the POWER button lights up.
Keep the power cord away from the connecting cables for the TV, VCR, and antenna. The power cord may
cause noise or screen interference.
Notes:
+ Asmall amount of power is always consumed even in standby mode. To switch off the power completely,
unplug the power cord from the AC outlet.
+ Ifthe power cord is unplugged or a power failure occurs, preset settings will be erased in a few days.
CAUTIONS:
* Do not touch the power cord with wet hands.
* Donotpullonthe power cord to unplug the AX-V4BK. When unptugging the AX-V4BK, always.
grasp the plug itself so as nol to damage the cord.
Putting Batteries in the Remote Control
Before using the remote control, put two supplied batterics first. When using the remote contro}, aim the
remote control directly at the remote sensor on the AX-V4BK,
1. On the back of the remote control, press down on the battery cover and slide ft out.
2. Insert batteries. Make sure to observe the proper polarity: (+) to (+) and (-) to (-).
3. Slide the cover tn.
ge 2 AGP (SUM-3)/AA (15F)
4
If the range or effectiveness of the remote contro] decreases, replace the batteries. Use two R6P (SUM-3)/
AA (I5F) type dry-ceil batteries.
CAUTIONS:
Follow these precautions to avoid leaking or cracking cells:
¢ Place batteries in the remote control so they match the polarity indicated: (+) to (+) and (-)
to (-).
+ Use the correct type of batteries. Batteries that look simitar may differ in voltage.
* Always replace both batteries at the same time.
* Do not expose batteries to heat or flame.
Page 9
Basic Operations
The following operations are commonly used when you play any sound source.
Turning the Power On and Off
Se Totura on the power, press the POWER button on the front panel or the AUDIO button on the remote control.
aL cai N10 The STANDBY indicatur goes off.
To turn off the power, press the POWER button or AUDIO button on the remote control again.
The STANDBY indicator lights up.
On the front From the
panel remote control
Salecting the Source to Play
You nced to select the source to listen before you start playing any source.
Press one of the source selecting buttons so that the source name appears on the display.
Selected source name appears
= Et > 5 On the front panel:
i) ie) 9 ce) TUNER Listen to the tuner.
(©) (@) TAPE Listen to the cassette deck connected to the TAPE jacks.
PHONO Listen to a record.
cD Listen to the CD player.
VIDEO View the video component connected to the VIDEO jacks.
On the front panel VCR View the video component connected to the VCR jacks.
From the remote control:
=) PHONO* Listen to a record.
C3 VIDEO View the video component connected to the VIDEO jacks.
TUNER* Listen to the tuner.
cD* Listen to the CD player.
TAPE* Listen to the cassette deck connected to the TAPE jacks.
© > VCR View the video component connected to the VCR jacks.
TAPE
Note:
* When you press one of the source selecting buttons on the remote control marked above with an asterisk,
the AX-V4BK automatically turns on.
From the remote control
Selecting different sources for picture and sound
You can watch picture from video equipment while listening to sound from audio equipment.
To listen to the sound from audio equipment while watching the picture from video equipment, press
one of the source selecting buttons for the video equipment (TUNER, TAPE, PHONO or CD), then press one
of the source selecting buttons for the audio equipment (VIDEO or VCR).
Page 10
MavA-XV

Sl
Selecting the Front Speakers
When
you
have
connected
two
sets
of
front
speakers,
you
can
select
which
to
use.
Pressing
in
the
SPEAKERS
1
or
SPEAKERS
2
button
activates
the
respective
set
of
speakers.
SPEAKERS
To
use
the
set
of
speakers
connected
to
the
FRONT
SPEAKERS
©
terminals,
press
in
the
SPEAKERS
ay.
Me
1
button
(mON),
and
press
out
the
SPEAKERS
2
button
(MOFF).
oO
©
To
use
the
set
of
speakers
connected
to
the
FRONT
SPEAKERS
@
terminals,
press
in
the
SPEAKERS
2
button
(ON),
and
press
out
the
SPEAKERS
I
button
(HOFF).
e
To
use
both
sets
of
speakers,
press
in
both
the
SPEAKERS
1
and
2
buttons
(mON).
To
use
neither
set
of speakers,
press
out
both
the
SPEAKERS
1
and
2
buttons
(ROFF).
Note:
When
only
one
set
of
the
front
speakers
is
connected
to
either
the
FRONT
SPEAKERS
or
@
terminals,
do
not
press
in
both
SPEAKERS
1!
and
2
buttons
(ON).
If
you
do,
no
sound
comes
out
of
the
front
speakers.
Adjusting the Volume
On the front panel:
To increase the volume, tum the MASTER VOLUME control clockwise.
To decrease the volume, turn it counterclockwise.
From the remote control:
To Increase the volume, press the VOLUME + button.
To decrease the volume, press the VOLUME - button.
On the front panel
CAUTION:
VOLUME
+
Always
set
the
MASTER
VOLUME
contro!
to
the
minimum
before
starting
any
source.
if
the
=>
From the remote control
MASTER
VOLUME
controlis
left
turned
up,
the
sudden
blast
of
sound
energy
can
permanently
damage
your
hearing
and/or
ruin
your
speakers.
Adjusting the Front Speaker Output Balance
If
the
sounds
you
hear
from
the
front
right
and
left
speakers
are
unequal,
you
can
adjust
the
speaker
output
balance
with
the BALANCE
control.
To decrease the feft channel sound, turn the BALANCE control clockwise.
To
decrease
the
right
channel
sound,
turn
the
BALANCE
control
counterclockwise.
When set to the CENTER position, no adjustment is applied.
Adjusting the Tone
eee
You can increase or decrease the amount of bass and treble reinforcement.
Adjusting the bass
To increase the bass reinforcement, turn the BASS contro! clockwise.
To
decrease
the
bass
reinforcement,
turn
the
BASS
control
counterclockwise.
When set to the FLAT position, no bass reinforcement is applied.
oo
ee
A
To increase the treble reinforcement, turn the TREBLE control clockwise,
To decrease the treble reinforcement, turn the TREBLE control counterclockwise.
When set to the FLAT position, no treble reinforcement is applied.
Page 11
Listening at Low Volume (Loudness)
Human
ears
are
not
sensitive
to
bass
at
low
volume.
To
compensate
for
this,
the
loudness
function
automatically
boosts
the
bass
Jevel
as
you
lower
the
volume.
touoness
To use the loudness function, press the LOUDNESS button on the front panel.
The LOUDNESS indicator lights up on the display.
To turn the function off, press the LOUDNESS button again,
The LOUDNESS indicator goes off.
Muting the Sound
You
can
easily
tum
down
the
volume
by
pressing
the
FADE
MUTE
button
on
the
remote
control.
Fane
wai
To
mute
the
sound
through
all
speakers
and
headphones
connected,
press
the
FADE
MUTE
button
so
that the VOLUME contro! tums down.
To
cancet
the
mute,
press
the
VOLUME
+
button
(or
the
VOLUME
-
button)
on
the
remote
control.
Recording a Source
You
can
record
any
source
playing
through
the
AX-V4BK
to
the
cassette
deck
connected
to
the
TAPE
jacks
and
the
VCR
connected
to
the
VCR
jacks
at
the
same
time.
While
recording,
you
can
listen
to
the
selected
sound
source
at
whatever
sound
and
tone
settings
you
like,
without
affecting
the
sound
levels
of
the
recording.
Note:
The
output
volume
level,
tone
adjustments,
as
well
as
surround
effects
cannot
affect
the
recording.
Listening with Headphones
TF
SSNS
A
standard
pair
of
headphones
can
be
connected
to
the
PHONES
jack
on
the
front
panel.
To
listen
with
only
headphones,
press
out
both
the
SPEAKERS
f
and
2
buttons
(HOFF),
CAUTION:
Be
sure
to
turn
down
the
volume
before
connecting
or
putting
on
headphones,
as
high
volume
can damage both the headphones and your hearing.
Page 12
MavA-XV

6-4
Using
the
Surround
Processor
Speaker
arrangements
for
Dolby
Surround
i
a
NN
Rw
ee
ee
et
eee
ea
The
following
illustrations
show
how
to
obtain
the
optimum
sound
environment
for
various Dolby
Surround
The
built-in
surround
processor
provides
three
types
of
surround
programs
—
Dolby
Pro
Logic,
Dolby
3-
settings.
Try
to
find
the
speaker
direction
and
location
10
creale
the
optimum
sound
field.
Channel
Logic,
and JVC’s
Hall
Surround.
What is surround? cor \|-aai ~When you have added a center speaker and rear speakers
Center Speaker
The sound heard in a concert hall or a movie theater consists of direct sound and indirect sound: early
reflections and reflections from behind. The reflected sounds are always delayed by the distances of the ceiling
and walls from the listener, These reflections are some of the most important elements of the acoustic
surround.
On JVC’s Hall Surround
In order to reproduce a more realistic sound field in your listening
Reflections fof. room while playing an ordinary stereo source, JVC's Hall Surround In this case:
from behind ‘
has been designed to give you clear vocals and to create the 1. Select PRO LOGIC.
feeling of a concert hall. The sound is reproduced through the 2. Select NORMAL or WIDE for center mode.
front speakers and rear speakers.
Early reflections
See pages 15 and 16 for more details.
On Dolby Surround
Dolby Surround has been also developed to reproduce the
important elements of the acoustic surround at home.
To watch the soundtracks of video software bearing the mark
* which includes the same encoded surround
information as found in Dolby Stereo films, the AX-V4BK can
provide you with 2 Dolby Surround programs (Dolby Pro Logic
and Dolby 3ch Logic).
Dolby Pro Logic: Select this mode when the optional rear
speakers are connected.
Dolby 3ch Logic: Select this mode when a center speaker is
connected without rear speakers.
* Manufactured under license from Dolby Laboratories Licensing Notes:
Corporation. DOLBY, the double-D symbol and “PRO LOGIC” are — * The surround processor has no effect on monaural sources.
trademarks of Dolby Laboratories Licensing Corporation. * The surround processor cannot be used for recording.
In this case:
1. Select PRO LOGIC.
2. Select PHANTOM for center mode.
See pages [5 and 16 for more details.
Using JVC's Hall Surround
You nced to connect one set of rear speakers to obtain the full effect.
_ 1. Press the SURROUND ON/OFF button (or the ON/OFF button on the remote control).
One of the surround program indicators (PRO LOGIC, 3CH LOGIC, or HALL) lights up on the
display,
2. Press the SURROUND MODE button (or the MODE button on the remote control) repeatedly
ts until the HALL indicator lights up on the display.
To cancel Hall Surround, press the SURROUND ON/OFF button (or the ON/OFF button on the remote
control) again.
Note: In this case:
You
can
also
adjust
the
delay
time
(see
Step
4
on
page
15)
and
the
sound
level
of
the
rear
speakers
(see
Step
1.
Select
3CH
LOGIC.
6
on
page
16)
for
Hall
Surround.
Once
you
have
adjusted
the
delay
time
for
the
Hall
Surround,
the
AX-V4BK
2.
Select
NORMAL
or
WIDE
for
center
mode.
memorizes the setting.
See pages 15 and 16 more details.
Page
13
Page
14
MavA-XV

Ol}
Preparing for Dolby Surround
The AX-V4BK memorizes two sets of Dolby Surround adjustments; one for Pro Logic and the other for 3ch
Logic. However, the sound levels of center and rear speakers cannot be stored separately.
sumone covorr 1,
2.
sumROUND MOE
cxwren woot 3
peur 4.
On the front panel
mene
From the remote control
TEST 5.
Page 15
Press the SURROUND ON/OFF button (or the ON/OFF button on the remote control).
One of the surround program indicators lights up on the display.
Press the SURROUND MODE button (or the MODE button on the remote control).
Each time you press the button, the surround program changes as follows:
PRO LOGIC 3CH LOGIC HALL
(DOLBY) (DOLBY)
PRO LOGIC: Select this mode when you use the rear speakers
3CH LOGIC: Select this mode when you use no rear speakers
HALL: This is JVC's original surround program, and is different from Dolby Surround. To use
this, see page 13.
Press the CENTER MODE button on the front panel.
Each time you press the CENTER MODE button, the mode changes as follows.
PHANTOM NORMAL WIDE
DEAE OFF ee
PHANTOM: Sclcct this mode when you have not connected a center speaker.
NORMAL: _ Select this mode when the size of the center speaker is smaller than thal of the front
speakers.
WIDE: Sclect this mode when the size of the center spcaker is the same as that of the front
speakers.
OFF: Select this mode to shut off the output of the center channel signal.
Note:
When you have selected 3CH LOGIC in Step 2 above, you cannot select PHANTOM.
Press the DELAY button to set the delay time of the delayed sound.
Each time you press the button, the delay time changes among 3 levels.
eel DELAY. DELAY-3 a
DELAY-1: When your distance to your rear speakers is greater than that to the front speakers.
DELAY-2: When your distance to your rear speakers is almost equal to that to the front speakers.
DELAY-3: When your distance to your rear speakers is less than that to the front speakers.
Note:
When you have selected ICH LOGIC in Step 2 above, you cannot adjust the delay time.
Press the TEST button on the remote control to check your setting.
When you press the button, “TEST” stasts flashing and a test tone comes out of the speakers in the
following order:
Pome front speaker. Center speaker Right front cuales)
Rear speakers
Notes:
° No test tone comes out of the rear speakers when you have selected 3CH LOGIC.
* Notesttone comes out of the center speaker when you select PHANTOM or OFF for the center mode.
Leonean,
(my
On the front panel
outer
Leven
cpatnoe
=
ty "BS
From the remote control
TEST
Using Dolby Surround
Set the levels of the center and rear speakers.
On the front panel:
Press the CENTER LEVEL +/- bution to set the sound level of the center speaker.
Press the REAR LEVEL +/— button to sct the sound level of the rear speakers.
From the remote control:
Press the CENTER +/~ button while pressing the LEVEL CONTROL button to set the sound fevel of
the center speaker.
Press the REAR +/- button while pressing the LEVEL CONTROL button to set the sound level of the
tear speakers.
Notes:
* Youcan adjust these levels in 1dB steps within the range of 10 dB. The sound levels of the left and right
rear speakers will be the same.
itis recommended that you adjust the output levels of all the speakers so that their sound levels become
identical when they reach your listening point.
* You cannot set the sound level of the rear speakers when you have selected 3CH LOGIC.
* Youcannot set the sound level of the center speaker when you select PHANTOM or OFF for the center
mode.
Although the sound levels of the center and rear speakers can be stared, they are not stored separately
for each surround program.
Press the TEST button on the remote control again to finish the preparation.
The test tone stops.
SURROUND OWOFP
Once you have set the Dolby Surround adjustments you can use the same adjustments every time you want
to enjoy Dolby Surround.
1.
Press the SURROUND ON/OFF button (or the ON/OFF button on the remote control) so that
one of the surround program indicator lights up on the display.
Press the SURROUND MODE button (or the MODE button on the remote control) repeatedly
if the surround program indicator (PRO LOGIC or 3CH LOGIC) you want does not light up.
Each time you press the button, the display changes to show the following:
PRO
LOGIC
3CH
LOGIC
HALL
(DOLBY)
(DOLBY)
Play a sound source which was processed with Dolby Surround and fs labeled with
mark,
To
cancel
Dolby
Surround,
press
the
SURROUND
ON/OFF
button
(or the
ON/OFF
button
on
the
remote
contro!)
again.
Page 16
MavA-XV

LL-b
COMPU LINK Remote Control System
The COMPU LINK remote control system allows you to operate JVC audio components through the remote
sensor on the AX-V4BK.
COMPU Law To use this remote control system, you need to connect JVC audio components through the COMPU LINK-
Hill Remote jill 3 SYNCHRO jacks (see page 8) in addition to the connections using cables with RCA pin plugs (see page 7).
Control This remote control system allows you to use four functions listed below.
m@__ Remote Control through the Remote Sensor on the AX-V4BK
You can contro} all audio components through the remote sensor on the AX-V4BK using this remote control.
For details, see page 18.
Note:
Aim the remote control directly at the remote sensor on the AX-V4BK,
@_ Automatic Source Selection
When you press the play button on a connected component or on its own remote control, the AX-V4BK
automatically turns on and changes the source to the component. On the other hand, if you select a new source
on the AX-V4BK or the remote control, the selected component begins playing immediately.
In both cases, the previously selected source continues playing without sound for a few seconds.
@ Automatic Power On/Off (only possible with the COMPU LINK-3 connection)
The audio components (tuner, CD player and cassette deck) connected to the AX-V4BK automatically turn
on and off with the AX-V4BK.
When you turn on the AX-V4BK, one of the connected components will tum on automatically, depending
which component has been previously selected.
When you tum off the AX-V4BK, these components connected will turn off.
m@__ Synchronized Recording
Synchronized recording means the cassette deck starts recording as soon as a CD or record begins playing.
To use synchronized recording, follow these steps:
1 Puta tape in the cassette deck, and a disc in the CD player (or a record on the turntable).
2 Press the record (@) button and the pause (#8) button on the cassette deck at the same time.
This puts the cassette deck into recording pause.
Note:
If youdo not press the record (@) button and pause {\1) button at the same time, the synchronized recording
feature will not operate.
3 Press the play (>) button on the CD player or on the turntable.
‘The source changes on the AX-V4BK, and as soon as play starts, the cassette deck starts recording.
When the play ends, the cassette deck enters recording pause, and stops 4 seconds later.
Notes:
* During synchronized recording, the selected source cannot be changed.
* Ifyour CD player is playing in program mode, a4-second blank is recorded between tracks so that the music
scan feature of your cassette deck can be used on the recorded tape.
+ Ifthe power of any component is shut off during synchronized recording, the COMPU LINK remote control
system may not operate properly. In this case, you must start again from the beginning.
* Refer also to the manuals supplied with your CD player and cassette deck.
Page 17
Using the Remote Control
a Oe
You can operate JVC's audio and video components with this AX-V4BK's remote control, since contro! signals for JVC components are preset
in the remote control.
To operate these components with the remote control, first select a source with the source selecting buttons on the remote control. Then, operate
that source using the remote control.
Note:
If you choose a source on the front panel directly, the remote control will not operate that source. To operate a source with the remote control,
the source must be selected using buttons on the remote control.
'MPORTANT:
To operate JVC's audio components using this remote control:
* You need to connect JVC audio components through the COMPU LINK-3 SYNCHRO jacks (see page 8) in addition to the
connections using cables with ACA pin plugs (see page 7).
* Aim the remote control directly at the remote sensor on the AX-V4BK.
To operate JVC's video components using this remote control:
* Aim the remote control directly at the remote sensor on the VCR or TV, not on the AX-V4BK.
After pressing the TUNER button, you can perform the following operations on a tuner:
1— 10, +10 Selects a preset channel number directly
To select channel number 5, press 5. For channel number 15, press +10, then 5, For
channel number 20, press +10, then 10.
RDS (Radio Data System) operating buttons:
PTY SEARCH Starts PTY (programme type) Search.
PTY SELECT +/- Select programme type you want.
DISPLAY MODE Changes the RDS information shown on the display.
JVC PULSAVA REMOTE COWTROL
After pressing the CD button, you can perform the following operations on a CD player:
> Starts playing
we Returns to the beginning of the current (or previous) track
mri Skips to the beginning of the next track
a Stops playing
" Pauses
1— 10, +10 Selects a track number directly
To select track number 5, press 5. For track number 15, press +10, then 5, For track
number 20, press +10, then 10.
After pressing the CD-DISC button, you can perform the following operations on a CD player-changer:
1~ 6, 7/P Select the number of a disc installed in a CD player-changer. Then continue to
operate the CD player as described above.
Note:
If you have the CD player-changer XL-MC100C and XL-MC100M, 1 — 6 buttons function as the DISC
SKIP button.
* Press 2, 4, or 6 to skip to the next disc.
* Press 1, 3, or 5 to skip back to the previous disc.
After pressing the TAPE button, you can perform the following operations on a cassetle deck:
> Starts playback
—< Fast winds a tape from right to left
Pr Fast winds a tape from left to right
= Stops operation
u Pauses
Afler pressing the VCR button, you can perform the following operations on a VCR:
> Starts playback
i Rewinds a video tape
mr Fast winds a video tape
a Stops operation
n Pauses
TV/VCR CH+4/— Changes TV channels on a VCR
Note:
While you are playing the source other than VCR—such as the CD player or cassette deck, you cannot
operate the VCR using the remote control.
After pressing the TV button (located at the upper leftmost portion of the remote control, not the one in the
POWER section}, you can perform the following operations on TV:
TV/VCR CH+/~- Changes TV channels
Notes:
+ When you press the TV button (located at the upper leftmost portion of the remote control, not the one
in the POWER section), the TV's input mode changes to TV.
* You can also turn the VCR or TV on and off by pressing the VCR or TV button in the POWER section
of the remote control.
Page 18
MEvA-XV

Zhe
Troubleshooting
MaPA-XV
Page 19
Use this chart to help you solve daily operational problems. If there is any problem you cannot solve, contact
your JVC service center.
PROBLEM POSSIBLE CAUSE SOLUTION
The display does not light up The powcr cord not plugged in Plug the power cord into an AC outlet
No sound from speakers Speaker signal cables not Check speaker wiring and reconnect if
connected necessary
The SPEAKERS buttons are not Press the SPEAKERS buttons in or out
set correctly correctly
An incorrect source is selected Select the correct source
Sound from one speaker only Speaker signal cables are not Check speaker wiring and reconnect if
connected properly necessary
The BALANCE control is setto © Adjust the BALANCE contro! properly
one extreme
Howling during record Your tumtable is too close to Move speakers away from the tumtable
playing speakers
Remote control does not There is an obstruction in front of Remove the obstruction
work the remote sensor on the A X-
V4BK
Batteries are weak Replace batteries
Specifications
Amplifier
Output Power
Total Harmonic Distortion
(8 ohins, | kHz)
Frequency Response (8 ohms)
Audio Input Sensitivity/
Impedance (1 kHz)
Audio Output Level
Signal-to-Noise Ratio
(°66 THF/DIN)
RIAA Phono Equalization
LOUDNESS control
(Volume Control at -30 dB)
Tone Control Range
Video Input Sensitivity/
Impedance
Video Output Level
Synchronization
Signal-to-Noise Ratio
At Stereo operation
Front Channels
At Surround operation
Front Channels
Center channel
Rear channels
PHONO
CD,TUNER,TAPE, VCR, VIDEO
PHONO
CD,TUNER,TAPE,VCR, VIDEO
TAPE,VCR
PHONO
CD,TUNER, TAPE, VCR,VIDEO
BASS
TREBLE
VCR, VIDEO
VCR, MONITOR OUT
40 watts per channel, min. RMS, driven into4 ohmsat 1 kHz with
no more than 0.9% total harmonic distortion. (IEC268-3/DIN)
30 watts per channel, min. RMS, driven into 8 ols at | kHz with
no more than 0.9% total harmonic distortion. (IEC268-3/DIN)
30 watts per channel, min. RMS, driven into 8 ohms, 40 Hz to 20
kHz with no more than 0.8% total harmonic distortion.
30 watts per channel, min. RMS, driven into 8 ohms at } kz with
no more than 0.8% total harmonic distortion,
30 watts, min. RMS, driven into 8 ohms at 1 kHz, with no more
than 0.8% total harmonic distortion.
10 watts per channel, min. RMS, driven into 8 ohms at !kHz, with
no more than 0.8% total harmonic distortion.
0.8 %* at 30 watts output
(* Measured by JVC Audio Analysis System)
20 Hz to 20 kHz (+1 dB)
20 Hz to 20 kHz (+1 dB)
2.5 mV/47 k ohms
200 mV/47 k ohms
200 mV
70 dB/66 dB
87 dB/67 dB
+0.5 dB (20 Hz to 20 kHz)
+5 +2 dB at 100 Hz
+8 +2 dB, -8 +2 dB (at 100 Hz)
+8 +2 dB, -8 £2 dB (at 10 kHz)
1 Vp-p/75 ohms
1 Vp-p (at 1 Vp-p input)
negative
45 dB
General
Power Requirements
Power Consumption
Dimensions (W x H x D)
Mass
AC 230V'L, 50 Hz
190 watts
5 watts (in standby mode)
435 x 147 x 346 mm
(17 ex 5 “he x 13 *einches)
7.4 kg (16.4 Ibs)
Design & specifications are subject to change without notice
Page 20

AX-V4BK
Description of Major LSls
mM MN171202K8F (1C401) : SYSTEM CONTROLLER 1
1. Terminal Layout 2.Key Matrix
:
GND (PIN2) PIN3) (PIN4) (PINS)
KOO PHONO cD TUNER TAPE
T.MUTE (PIN6) (S401) (S402) (S405) (S406)
LOUDNESS
POWER/STANDBY LED KO1 VIDEO VCR TV LOUDNESS
ee (PIN7) (S403) (S404) ($407) (S408)
PROLOGIC LED
SOURCE MUTE KO3 POWER
3 52 | VOL. LED (PINS) (S413)
so MN171202K8F VOL +
VOL-
COMPLINK
OUT
KO4
SURR.
Pine
ae
comptina
IN
(PIN10)
|
($417)
(S418)
(5420)
STEREO
INH IN CENTER CENTER CENTER
RM IN Kos | DELAY | MODE LEVEL- LEVEL +
RESET PIntt) | (S421) | (5422) ($423) (5424)
DO
Onynun bBwn a
VIDEO!
VIDEO2 SOURROUND ON/OFF
3. Description
Fel ee ed
| 1 {vDD _‘[ -- | Power supply SURR.ON/OFF | O | SURROUND ON/OFF control
[2 [kio | T]Keymatricinput | 34|t______ | 0 TWsoundselectcontrolsignal |
D3 [ki [ F |Keymatricinput_________| 35 |8t82_____| 0 [Strobe signal tolcear,eo1___|
Pa _[xi2_[ Key matrixinput_———SS*d 6 CLK «dO Clock output SS
Ts [kis] 1 [Key matrix input] 37 |sta1_ | 0] Strobe signal toicaz1__—SS—=S
[6 [01KO0 | O| Grid control signaliKey matixoutput [38 [DATA | | Data output
[7 [2Kot [0 [Grid controlsignaliKey matrixoutput___| 39 |CE [| Chip enableoutput ——S~S
[8 [03KO2 | © | Grid controlsignaliKey matrixoutput | 40 [CK [ 0 CLOCKsignal output _——S—~™
[9 [bakos [0 [Grid control signaliKey matrix output] 41 [Di [ 1 |Tunerdatainput____——S—S
[10 [b5KO4 [0 | Grid controlsignaliKey matrix output | 42 [D0 [0] Tunerdataoutput_—S~S
[11 [6KO3 [0 | Grid control signaliKey matrix output | 43 [RESET____[ O[RESETsignal input ____——+
[12 [b7KO6 [0 | Grid control signaliKey matrix output | 44 [RMIN [1 [Remote signal input ___————*+
[13 [08Ko7 [0 | Grid controlsignaliKey matrixoutput | 45 [INHIN | | [inhibit signal input
Pia [s0____]o[Segmentcontrolsignal ___—_——_—+| 46 [STEREO PrISTEREO signal input____——S——id
[15 [s1__] 0 ] segment controlsignal__] 47 TUNED] 1 | TUNED signal input]
16 [52] 0 [Segment control signal] 48 [COMPULINKIN [1 [COMPULINK signal inpot__——*+|
[17 [s3_____] 0 [Segment controlsignal | 49 [COMPULINKOUT| 0 [COMPLUINK signal output‘
Tis [vPp____]o[Powersupply —————S—SCS~d SO] VOL- «| VOL. controlsignal SCS
P19 [s4 | 0 [Segment controlsignal______| 51 [VoL+ [0] VOL. controlsignal __————*+d
[20 [35 0 [Segment control signal] 52 |VOLLED | O| VOL. indication control +
P2i_[s6 | 0 [segment controlsignal________] 53 [SOURCE MUET [0 | SOURCE MUET control signal |
[22 [87] 0 [segment controlsignal_____] 54 | PROLOGICLED_[ 0 | PROLOGIC indication control]
23 [s8______] 0 [segment controlsignal____] 55 [3CHLED [0] 3CHindication control __———S~™
[2a [59 | 0 [Segment controlsignal_ | 56 [HALLLED [©] HALL indication control ‘|
[25 [S10 | 0 [Segment controlsignal__] 57. PSTANDBYLED [0 | STANDBY indication control___—_|
[26 [811 | 0 [Segment controlsignal________] 58 [LOUDNESS [© | LOUDNESS controisignal |
[27 [812 [ 0 [Segment controlsignal_____] 59 [T MUTE | O] TUNER MUET controlsignal_ |
[28 [S13 | 0 [Segment controlsignal | 60[x1_-[-|@nD. CSCS
[29 [sia [0 ]Segment controlsignal | 61 | f=[Not used ——SSCSCSCSC~SCSCS
P30
[S15
|
0
|
Segment
controlsignal_________|
62
|
i]
ere
P31
[vibgo1
[0
[Controt
signal
to
1c661
[=
[Oscilationterminal
[32 [vide02 [0 [Control signaltoicest ____] 6a | [= [Oscillation terminal ____———*d

AX-V4BK
M@ 1A2785 (1C601) : Dolby Pro Logic Surround Signal Processor
1. Terminal Layout
2. Pin Functions
Capacitor for spectrum filter in noise
sequencer
Capacitor for spectrum filter in noise
sequencer
Symbol | 1/0 Functions
Capacitor for time constant
22
(in log differential area)
VcSs-1
Capacitor for time constant
23
{in log differential area)
2 NS-BPF2 VCS-2
Capacitor for time constant
24
(in log differential area)
3 VREF Analog reference voltage VCS-TH
$-DC-OU Capacitor for DC-cut Sch L+R RECT Capacitor for Center channel detection
C-DC-OU 26 | DC-CUT
Capacitor for DC-cut Cch Capacitor for DC-cut at detection circuit
L-DC-OU Capacitor for Surround channel detection
4
Capacitor for DC-cut Lch 27 |L-RRECT
Ww Ww Ww N =
7 }|R-DC-OU Capacitor for DC-cut at detection circuit
4
Capacitor for DC-cut Rch 28 | DC-CUT
R-BPF1
a
ight channel signal input LPF,HPF for Right channel control circuit
VREF-
BUFFER VREF low impedance 29 | R-BPF3 LPF,HPF for Right channel control circuit
L-IN
Left
channel
signal
input
30
|
R-BPF2
LPF,HPF
for
Right
channel
control
circuit
C-TRIM
DC-CUT Capacitor for DC-cut Center channel
1
=
Ground
C-MODE-
CAP
Capacitor for Center channel output low-
12 %
pass filter
L-BPF1 LPF,HPF for Lch control circuit
w
w
4
9 fe) Cc 4
e oO Cc
4
—
w
L-BPF LPF,HPF Left channel control circuit Center signal output
35
=
—
> Oo
L-BPF LPF,HPF Left channel control circuit urround signal output
Ww
rn
ie} Cc 4
DC-CU
o)
2
= NS i
Capacitor for DC-cut at detection circuit ight channel signal output
R
RECT
Capacitor
for
Right
channel
detection
L-OUT
Left
channel
signal
output
DC-CUT
Capacitor
for
DC-cut
at
detection
circuit
Vcc
|
|
power
supply
.
:
Oscillation
for
nois
nd
auto
|
L
RECT
|
Capacitor
for
Left
channel
detection
OSC
|
wan
I
agree
balance
Capacitor
for
time
constant
VLR-TH
/STB
Strobe
signal
in
2
|
wane
|
M0
log
ditterential
area)
of
ee
|i
y
ile
ee
Capacitor
for
time
constant
20
VLR-2
:
?
.
.
DATA
Serial
interface
data
input
(in
log
differential
area)
Capacitor
for
time
constant
rae
VER-I
Eg
(in
log
differential
area)
CLK
ie
Serial
interface
clock

AX-V4BK
wesbeig
01g
‘¢
1-15

AX-V4BK
M LV1011 (1C641): Dolby Surround Passive Decoder
1. Terminal Layout
2. Block Diagram

AX-V4BK
3. Pin Functions
VO
Digital GND
Symbol
DGND
DC-CUT
Surround signal output
Capacitor for DC-cut
—
3 S-OUT
VREF
=
5 R-MIX-OUT
Pn no. 10
fea le
ax
[1
[semtineme
cee
SSOSCSCSCSSCSCSCSC“C~*~S*S
onta
[+
[Seal
merce
tome
a
[snort
|=
[enacts
tor
note
react
arectn
SSCS
|
6
|
owrarcr
|
|
Resistor
for
noise
reduction
reference
current
Pave
[=f
OOCOOOCOCOCSC“‘(S
fos
|
um
[il
Left
channel
signal
input
= [ew
leet
ee
Lone
Le
L-MIX-OUT
17 ADND
18 DC-CUT
D/A Capacitor for integrator
NOISE
SHAPER
Capacitor for noise shaper
Capacitor for integrator
Supply for the digital section
Oscillation terminal
Oscillation terminal
N N
N NO
A/D
VDD
OSC
N
WwW
N
OSC
1-17

AX-V4BK
MISPS-420-1 (IC402) : Remocon Module IC
Pa
Limiter
M@
PST6OOE
(1C403)
:
Reset
IC
GND
Vcc
Vout
Mi NJM2246D(IC661) : Video Switch
CTL 1 | CTL2 Output
L L

AX-V4BK
Internal Connections of the FL Display
WELU0001-144 : FL401
a
id:
ny
Ha!
Li
Thy
fai
‘hid
Ht
t i 1 !
ae mo me eo mo me rr 8 re co eo me mt cmt mo cw ne mo een ho me en mn ee hw ee ee hee ete 8 ce ene Ai ee me me ee
‘AY
P12
AS).
Pin Connection
Pomnoner PTT [ols [e> [a] [elu] a] a] fale
[sn [o fr erable [non oe |
Fees | [[on zn] |e nae 2 | | [a
[esc | slo] |e fee 2 oe |
Note F:Filament, G:Grid, P: Element, : No Pin, NC : No Connection

AX-V4BK
Disassembly Procedures
(1) Removing the top cover
1. Remove 4 screws @ fastening both sides of top cover, and 3 screws ® fastening the rear side.
2. Remove the top cover.
(2) Removing the rear panel
1. Remove the top cover
2. Remove the 18screws ®,2 screws © and 2 screws O.
3. Remove the rear panel.
BLACY
gp mF
@ aot
£406308-001 ... £73273-006 © ... SBST3006M © ... SDSG3006M
1-20