JVC RX-504VBK User manual

RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
JVC
ERVICE MANUAL
RX-504VBK/RX-504VLBK
move.
no.
RX-SOSVTN/RX-SOSVLTN
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Control Component
Note:
RX-504VBK/RX-504VLBK
and
RX-505VTN/RX-505VLTN
are
competely
same
in
their
structure,
except
for their outlook colours.
Contents
Safety
Precaution
.............cceccceeseeee
sense
een
eeneneeeees
1-2
Power
Amplifier
Adjustment
Procedures
...............
1-36
Instruction
BOOk
..............:eceeeeeesen
eens
eseceneneetereees
1-3 Timing
Chart... :
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ccccaciseicetseecdeseectese
ni
staseessaeenet
1-36
Description
of
Major
ICs
..............c::eceeeeseeeeee
renee
1-24
Block
Diagram
..............:ccccceseeccseeeeeneeeesecneeesseners
1-37
Internal
Block
Diagram
of
Other
ICs
.................006
1-30
Schematic
Diagrams
.................:ccsseeseeeevereeeee
Insertion
Internal
Wiring
of
FL
Display
................:.:eeeeeeeeeeee
1-33
Printed
Circuit
Board
................2..c:ceeeeeeeeen
nee
Insertion
Disassembly
Procedures
..............::.ceceeeeeeeeneneeoees
1-34
Connection
Diagram
............ccecceeeeeeeeneneeeneeee
Insertion
FM/AM
Tuner
Alignment
Procedures
.................55+
1-35
Parts:
LiSt:\si20.c.tewedcicteracencicedeidensvetectecsevanegaee
Insertion
Mo.
20220
Jan. 1991

RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
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.
Services
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
manufacture
of
responsibility
for
personal
injury
or
property
damage
resulting
therefrom.
3.
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.
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
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,
particularily
any
exposed
metal
part
having
a
return
path
to
the
chassis,
to
a
known
good
earth
ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
®@ Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, | ,000
ohms
per
volt
or
more
sensitivity
in
the
following
manner.
Connect
a
1,500Q
10
W
resistor paralleled by a 0.15 »F 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.
Now, reverse the plug in the AC outlet and
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity.)
Piace this
probe ort
repeat
each
measurement.
Any
voltage
each
exposed
measured
must
not
exceed
0.75
V
AC
(r.m.s.).
15000
10W
metal
part.
This
corresponds
to
0.5
mA
AC
(r.m.s.).
Good
earth
ground
Warning
. 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.
_ lf mains voltage selector is provided, check setting for local voltage.
1-2 (No.20220)

Specifications
AMPLIFIER SECTION
Output power
(CD INSP. OUT) :(For the U.S.A. and Canada)
80 watts per channel, min. RMS, both
channels driven into 8 ohms from 20 Hz
to 20 kHz, with no more than 0.03%
total harmonic distortion.
(For other areas)
70 watts per channel, min. RMS, both
channels driven, into 8 ohms from 20Hz
to 20kHz, with no more than 0.03%
total harmonic distortion.
70 wattes per channel, min. RMS, both
channels driven, into 8 ohms at
1kHz(DIN).
20 wattes channel, min. RMS, into 8
ohms at 1kHz, with no more than 0.7%
total harmonic distortion.
: 0.03% at 80 watts
Rear channels
intermodulation distortion
input sensitivity / impedance
PHONO :2.5mV/47k ohms
TAPE 1 PLAY,CD : 200mV /33k ohms
TAPE 2 PLAY, VIDEO
VCR PLAY
Recording output level : 200mV
Frequency response
PHONO
(RIAA equalization)
TAPE 1 PLAY, CD
TAPE 2 PLAY, VIDEO
VCR PLAY
2:20 Hz — 20kHz +0.5dB
:10Hz — 30kHz +1dB
Signal-to-noise ratio
PHONO : 71dB (‘66IHF)
78 dB (‘78 IHF, REC OUT)
66 dB (DIN)
TAPE 1 PLAY, : 91 dB (‘66IHF), 85 dB (‘78 IHF)
TAPE2 PLAY, CD 67dB (DIN)
VIDEO VCR PLAY
S.E. A. graphic equalizer
Center frequencies : 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz,
6.3kHz, 16kHz
Control range : 10dB
Tone controls
BASS :*8dB (100Hz)
TREBLE :+8dB (10kHz)
FM TUNER SECTION (IHF)
> 87.5 MHz — 108.0 MHz
: Mono 10.8 dBf (0.95V/75 ohms)
Tuning range
Usable sensitivity
50 dB quieting : Mono 16.3dBf (1.84V/75 ohms)
sensitivity Stereo 38.3 dBf (22.5 nV /75 ohms)
Signal-to-noise ratio : Mono 80 dB
(IHF-Anet, at 85dBf) Stereo 73 dB
Total harmonic
distortion (1 kHz) : Mono 0.15%
Stereo 0.2%
Frequency response :30Hz — 15kHz,(+0.5 dB, -3 dB)
Capture ratio ( at 85 dBf) :1.5dB
Alternate channel
selectivity : 60dB(+ 400kHz)
: 85dB (at 98 MHz)
: 40 dB (at 1 kHz)
IF response ratio
Stereo separation
RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
AM TUNER SECTION
MW
Tuning range
Channel space
Area
9kHz 10kHz
530kHz~1710kHz
522kHz~ 1629kHz
522kHz~1629kHz
522kHz~1629kHz
531kHz~ 1602kHz
530kHz~1600kHz
Sensitivity
Loop antenna > 300 nV /m*
External antenna 730 «V*
Signal-to-noise ratio : 50 dB* (100mV/m)
Selectivity : 25 dB” (+9kHz, +10 kHz)
LW (RX-504L/505L )
Tuning range
SC ee eee
| Austria |
| OtherArea |
Sensitivity
Loop antenna > 6004V /m at 245kHz
External antenna :100uV at 245kHz
Signal-to-noise ratio
(100 mV /m) : 50dB at 245kHz
Selectivity > 32dB + 9kHz at 245kHz
VIDEO SECTION
Output signal level > 1Vp.p (at 1 Vp.p input)
(VCR REC,
MONITOR OUT)
Impedance : 75 ohms, unbalanced
Synchronization : Negative
Signal-to-noise ratio > 45dB
Crosstalk : 45d0B (3.58MHz)
GENERAL
Dimensions :17-3/16" x5" x 13”
(WxHxD) (435 x 127 329 mm)
Weight : 21.6 Ibs. (9.8 kg)
* Measured at 1,000 kHz or 999kHz
Design and specifications subject to change without notice.
POWER SPECIFICATIONS
: Power
Line Voltage & Frequency Ciprsiimptio
4 n
U.S.A. Canada AC120V~, 60Hz 230 watts, 310 VA
Continental Europe AC230V~, 5OHz
U.K. Australia AC240V~, 50Hz
Al ~~
ihap nies €110/127/220/240V
selectable, 50/60Hz
(NoZ0220) 1-3

RX-504VBK/RX-5O4VLBK
RX-505VTN/RX-505VLTN
YolUl gox-¥m Oxo) nal ole) ay) a) am Oxesalay-xoa tle) ayy
Switch the power off when connecting any cables.
Turntable
CD player
Vi0EO N aes VIO
OUT
VCR
DAT deck or cassette
Cassette deck deck
x —_—o = — —; =a
LINE IN LINE OUT LINE IN LINE OUT
(Analogue) (Analogue)
Since mutual interference between video
and audio components can cause noise and
distorded pictures, you are recommended to
use Coaxial cable for the TV/video antenna
Video disc player
To TV antenna
@GND
© AUDIO terminals (PHONO, CD, TAPE 1, TAPE 2, VCR, VIDEQ)
@ VIDEO terminals (VCR, VIDEO}
@ COMPU LINK-1/SYNCHRO terminais
Connect to JVC components provided with COMPU LINK-1/SYN-
CHRO terminals for the COMPU LINK control system function
P-OYAABIE F IATL
WoUFIVET WS inl VEN
I!/Remofe //II
Control System
COMPU LINK is a computer-linked system by which individual
JVC audio and/or video components are controlled via a com-
puter. For further details, see page 16.
1-4 (No.20220)
Notes:
@ When connecting components, connect their left and right chan-
nels correctly. If channels are reversed, the stereo effect will be
degraded.
@ The AC OUTLETS do not supply power when the power switch
is turned off. Do not connect equipment requiring more than the
outlet’s rated value.
@ Do not connect the remote cable when connecting the JVC cas-
sette deck having COMPU LINK-1/SYNCHRO terminals to the
TAPE 2 terminals.
@ When a JVC DAT deck having COMPU LINK-1/SYNCHRO termi-
nals is used, be sure to connect it to the TAPE 2 terminals and
also connect the remote cable.
®@ Connect a turntables using a moving magnetic (MM) type car-
tridges to the PHONO terminals.

elaTh coy am Oxeyeny exe) ar-lay am Ore) alal-rentleyarsy
* in case the JVC's monnor
TV has the multi-input
function, connect to the
“VIDEO 1” terminal
VIDEO IN
(EXT IN*)
mc far
'
TAPE
Open the speaker terminal Clamp the wire by
by pressing the lever and resetting the lever.
insert the stripped end ot
the cord
@ MONITOR OUT terminal
© SPEAKERS 1, 2 terminals
@ SURROUND SPEAKERS terminals
RX-504VBK/RX-SOAVLBK
RX-505VTN/RX-505VLTN
iFront speakers)
Speakers 2
(Front speakers)
Speakers 4
(Rear speakers)
Surround speakers
Notes:
@ Connect speakers with the correct polarity: (+) to (+) and (—)
to{—}. Reversed polarity wil! Gegrade the stereo effect. Be care
ful to prevent adjacent speaker wires from touching each other.
@
Use
sneakers
with
[ne
correct
impedance.
The
correct
imped
ance
1S
indicated
on
the
rear
panel
of
the
receiver.
@
When
using
surround
speakers,
be
sure
to
connect
both
the
night
and left speakers, connecting only one speaker will not generate
sound
(No.2022 0) 1-5

RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
Installation of Loop Antenna
Fig. 2| Fig. 3
Insert in the direction of arrow.
Fig. 1] Fig. 5 Fig. 6
AM antennas
Figure 1: How to assemble the AM loop antenna
Figure 2: AM loop antenna
This antenna is for the reception of local AM broadcasts.
Figure 2: AM external antenna
If AM reception is unsatisfactory, connect an external AM antenna
(single-wire antenna) to the AM EXT terminal
Figure 3: Connection of AM antenna
@) Open antenna terminals levers
(2) Plug cords into the terminals
(3) Close the levers.
Figure 4: Noise and interference
Change the direction of the loop antenna, or re-install it in a better
psition ‘f the reception is noisy.
75-ohm antenna
with coaxial FM feeder antenna AM external antenna
Notes:
@ If the provided loop antenna !s not connected or an uninsulated
antenna wire tcuches the rear panel, it will be impossible to receive
AM broadcasts
@ When installing an e.tersal AM antenna, leave the AM loop an-
tenna connected
FM antennas : 2
Figure 5: 75-ohm FM antearta ith coatfa
Loosen the screws on the brackei and inseri ‘he cable through the
ring from below. Connect the strippea 7ore to tne upper terrninail then Anica athe
tighten the ring. The ring is the antenna ground
Figure 6: FM Feeder antenna
Connect to the FM 300 Q terminal. Make sure the feeder antenna
wires do not touch any other terminais. R
z
1-6 (No.20220)

RX-504VBK/RX-504VLBK
RX-505VTN/RX-SO5VLTN
Display window ® @
@ POWER (ON/STANDBY)
Press this button to turn the power ON. Press again to turn the
power off and activate the STANDBY mode. The STANDBY indi-
cator will light
A small amount of power (5 watts) is consumed in the STAND-
BY mode. To turn the power off completely, disconnect the power
cord from the wall outlet. Preset data 1s retained in memory while
the power cord is plugged into the wall outlet. If the power cord
is disconnected or a power failure occurs, data is retained for two
or three days.
© SPEAKERS 1, 2
Turns speakers 1 and 2 ON or OFF.
© PHONES
Plug headphones into this jack. If you want to hear from the head-
phones alone, turn OFF speakers 1 and 2
@ cSRP
COMPU LINK SOURCE RELATED PRESET SYSTEM feature
CSRP: Turns the CSRP feature ON or OFF
MEMORY: Stores CSRP data in memory.
© CHARACTER INPUT
Use the following keys to assign tities or other data to the S.E.A
patterns or to TUNER channels you have preset
° CHARACTER « ENTER
« DOWN, UP
For details, see ‘‘Entering Characters’
@ LOUDNESS
Turns LOUDNESS ON or OFF. The ON position makes up for loss
of the human auditory sensatian when the sound volume is low
@ BALANCEL, R
Adjusts the volume balance between the left and right speakers.
@ DIGITAL SURROUND
Use these keys when you playback with a surround sound effect.
e REAR LEVEL © DELAY TIME
¢ SURROUND ¢ INPUT BALANCE
* HALL, STADIUM ¢ DOLBY SURROUND
@ TUNER
Use the following keys to listen to AM or FM broadcasts:
¢ MEMORY ¢ TUNING <,>
e AUTO MEMORY~ ¢ 1-10, +10 (Tuner numeric keys)
¢ FM MODE/MUTE
For details, see ‘‘Listening to AM or FM broadcasts’’
@ MUTE
Turns sound ON or OFF temporarily.
@ VOLUME < ,>
Adjusts the volume of sound from the speakers or headphones.
@ REMOTE SENSOR
Receives signals from the remote control unit
@ RECEIVED and POWER STANDBY indicator
Lights when signals are received from the remote control unit or
when the machine is in the STANDBY mode
@ SOURCE
Use the following keys lo select lo select sources:
e VCR e FM
¢ VIDEO « AM
¢ PHONO * TAPE 1
«CD ° TAPE 2
(alternates between ON and OFF)
@® SEA
Use the following keys for the S.E.A. Graphic Equalizer:
© SEA ¢ MEMORY
e FLAT e PRESET
¢ REVERSE e LEVEL < , >
¢ DISPLAY e FREQUENCY < , >
For details, see ‘‘Using the S.E.A. graphic equalizer’
© Surround mode indicator
Shows the surround mode selected.
(No.20220) 1-7

RX-504VBK/RX-5O04VLBK .
RX-505VTN/RX-SO5VLTN
— Before Operating —
Before plugging the power cord into an AC outlet, check to be sure the individual
components are connected correctly.
1. Turn the POWER to ON. 4. Adjust the VOLUME and BALANCE keys to your taste.
VOLUME
POWER BALANCE
ON/STANDBY . . . @ . . .
a
“8 Morac mre
i oe Pact Pe eI wwe
| i =. PLP deh
Note:
These keys vary their settings while they are being pressed. The dis-
The display window lights up. play normally shows VOLUME. It will change to BALANCE for about
5 seconds when the BALANCE keys are pressed.
Note:
lf a malfunction occurs when the power is ON; unplug the power 5. Press the LOUDNESS and MUTE keys as needed.
cord and then plug it in again.
@ Press to make up for loss of the human auditory sensation when
2. Selecta speaker system by pressing one of the SPEAKERS keys. the sound volume is low.
Lous VOLUME
1 SPEAKERS 2 — BALANCE
ON OFF a
LOUDNESS
@ Press to temporarily cancel sound output.
Note:
If speakers are not connected to both SPEAKERS 1 and 2 terminalis, MUTE
do not turn ON both speaker systems as that would suppress sound >_—- —
output. ; NA i | | i
3. Press one of the SOURCE keys for the desired source. \ 7
To release it press the MUTE key again.
co
| | | Note:
i_ ti] The MUTE key is reset when the VOLUME or BALANCE keys are
pressed.
1-8 (No.20220)

RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
Listening to AM or FM Broadcasts
®@ Selecting a Station
1.Press the AM or FM key.
*M AM
2. Use the TUNING keys to find a station.
<< TUNING >
Each time the TUNING keys are pressed, the frequency is varied
in steps of 10 kHz for AM and 0.1 MHz for FM. The setting will
vary continuously while the keys are pressed and held.
FM Oh TC owe
ti fl
Auto-tuning starts when the TUNING keys are released and stops
when a Station is tuned. To halt auto-tuning, press a TUNING key.
3. The TUNED indicator will lignt when a station is tuned in correctly.
vue
Adjust the antenna if the indicator does not iight
@ While tuning in an FM station, press the FM MODE/MUTE key
to light the MUTE/AUTO indicator, this cuts out inter station noise
while tuning
@ The STEREO indicator will light when an FM stereo station !s tuned
in correctly.
If the FM stereo station is weak and noisy, press the FM MODE/MUTE
key again to turnotf the MUTE/AUTO indicator to improve reception
(broadcast becomes monaural).
A A en De el ect Fh
as a 9 ea | orem |
@ Presetting Stations
You can preset a total of 40 AM and FM station (CH 1 through CH 40).
1. Tune in the desired station with the TUNING keys.
MUT!
rs
2. Press the MEMORY key to light its indicator.
MUTE
MEMORY STEREO Mure
MEMORY
Cl
FM
.
~ “ch
3. Enter the channel number with numeric keys while the indicator
is on (for about 5 seconds).
MUT!
TUNED] [STEREO] MUTE
MP deg Ich
@ |f{ the indicator turns off before you enter the channel number,
press the MEMORY key again.
4. Repeat this procedure to preset other channels.
(No.20220) 1

RX-504VBK/RX-504VLBK
RX-505VTN/RX-505VLTN
# AUTO MEMORY
The auto-memory feature scans frequencies upward and presets sta-
tions as they are tuned, in ascending channel number order.
1. Using the TUNING keys, select the frequency from which you want
auto-memory to start (the lower-limit frequency).
2. Press the AUTO MEMORY key to light its indicator.
AUTO
sam AUTO
et Pe oi
" Bal’. deh ~~ ch
Enter the starting channel number with the numeric keys while
the indicator is on (about 5 seconds)
_— nS
FM CI OTe \
ie ae as ee jo
@ If the indicator turns off before you enter the channel number,
press the AUTO MEMORY key again.
3. The auto-memory feature starts scanning frequencies upward.
The TUNED indicator will light when a station is tuned, with the
channel number blinking (for about 5 seconds)
AUTO
Fil) Wte A — cogs /
_/ of. Ll ich
4. The presetting is complete when the MEMORY indicator is lit
[MEMORY] [TUNED] [STEREO rts
FM EE ae
ah hcg leh
This continues until the upper-limit frequency ts reached or all 40
channels are filled
Note:
If you do nat want to preset a station, resume scanning by pressing
the AUTO MEMORY key while the channel number is blinking. To
halt the auto-memory feature, press any TUNER key other than the
AUTO MEMORY key.
1-10 (No. 20220)
@ Recalling preset channels
1. Press numeric keys to select a preset chanel.
fi 2
‘
VRE
[URED]
[aTERED)
MUTE
Lt
/
=
-
ae
Lil
;
=.
lene
Be
i
@ To indicate numbers 1 through 10, simply press the appropriate
keys.
To indicate numbers over 10, press the appropriate combination
of keys.
Examples;
To indicate 17, press ‘+ 10", then ‘’7"’.
To indicate 20, press ‘+10’, then ‘'10’’.
To indicate 26, press ‘‘+ 10"' twice, then ‘'6”
To indicate 40, press ‘'+10"' three times, then ''10’'.