JVC RX-5020VBK, RX-5022VSL Service Manual

RX-5020VBK/RX-5022VSL

SERVICE MANUAL

AUDIO/VIDEO CONTROL RECEIVER

RX-5020VBK

FM MODE

PTYÐPTY SEARCHÐPTY

RX-5022VSL

Area suffix
J ---------------------- U.S.A.

C ------------------- Canada

L

FM/AM TUNING

FM/AM PRESET FM MODE

UP

STANDBY

DOWNUPDOWN

STANDBY/ON

PHONES

DIGITAL

SURROUND

SURROUND ON/OFF

SURROUND MODE

INPUT ATT

SPEAKERS ON/OFF

MEMORY

INPUT DIGITALINPUT ANALOG

AUDIO/VIDEO CONTROL RECEIVER

DVD VCR TV SOUND

CD TAPE/CDR

FM/AM

SOURCE NAME

ADJUST

DOWN UP

MASTER VOLUME

SETTING

CONTROL

As for RX-5022VSL the body is silver color

Contents

Safety precautions --------------------------------------------------------1-2
Importance administering
point on the safety-----------------------------------------1-3
Disassembly method -----------------------------------------------------1-4
Adjustment method -------------------------------------------------------1-9
Description of major ICs -------------------------------------------------1-10~24

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21065

Feb. 2002

RX-5020VBK/RX5022VSL

1. This 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 circuitr y 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 fur ther
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 par ts 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 ( ) on the Parts List in
the Service Manual. The use of a substitute replacement 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, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W 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 repeat each
measurement. Voltage measured any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

Place this
probe on
each exposed
metal part.

!

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs m ust be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.

In regard with component parts appearing on the silk-screen pr inted side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.

(This regulation does not correspond to J and C version.)

1-2

Importance administering point on the safety

LVA1029-C9

B110

Primary part

PW105

PW104

B109

B108

B106

B105

PW102

B107

TA201

TA202

RX-5020VBK/RX5022VSL

Secondary parts

PW103

PW101

R201

B104

B103

B102

B101

FC232

F 203

FC231

FC211

6.3A-125V

F 201

6.3A-125V

FC212

122

FC222

F 202

2A-125V

FC221

R1

121

2A-125V

CN251

EP1

110

111 112113

B191

B159

RY201

114120

130131

B192

B160

D205

LVA1029-C7

Caution: For continued protection against risk of
fire, replace only with same type 6.3A/125V for
F201, 2A/125V for F202 and F203.
This symbol specifies type of fast operating fuse.

Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F201 comme le meme type
que 6.3A/125V, et 2A/125V pour F202 et F203.
Ce sont des fusibles suretes qui functionnes rapide.

^

1-3

RX-5020VBK/RX5022VSL

Disassembly method

Removing the top cover (See Fig.1)

1.

Remove the four screws A attaching the top cover
on both sides of the body.

2.

Remove the three screws B on the back of the body.

3.

Remove the top cover from behind in the direction of
the arrow while pulling both sides outward.

Removing the front panel assembly

(See Fig.2 and 3)

Prior to performing the following procedure, remove
the top cover.

1.

Disconnect the card wire from connector CN402 on
the audio board and CN201 on the power supply
board in the front panel assembly.

2.

Cut off the tie band fixing the harness.

A

Tie band

Main

board

CN402

Top cover

2

A

B

2

Fig.1

C

Front panel assembly

C

CN201

Power supply

board

3.

Remove the three screws C attaching the front
panel assembly.

4.

Remove the four screws D attaching the front panel
assembly on the bottom of the body. Detach the front
panel assembly toward the front.

Removing the rear panel (See Fig.4)

Prior to performing the following procedure, remove
the top cover.

1.

Remove the power cord stopper from the rear panel
by moving it in the direction of the arrow.

2.

Remove the seventeen screws E attaching the audio
input board, DVD board, video board and tuner
board to the rear panel on the back of the body.

3.

Remove the four screws F attaching the rear panel
on the back of the body.

Audio board

E

E

E

E

D

E

Fig.2

Front panel assembly

Fig.3

E

D

Cord stopper

1-4

F

Rear panel

F

Fig.4

E

F

F

Removing the digital signal board / audio
input board / DVD board / video board
and tuner board on the audio board

(See Fig.5 to 8)

Prior to performing the following procedure, remove
the top cover and the rear panel.

1.

Cut off the tie band fixing the harness.

2.

Disconnect the d
CN481 on the audio board.

3.

Disconnect the audio input board, DVD board and
the video board from connector CN421, CN431 and
CN441 on the audio board.

4.

Disconnect the tuner board from connector CN411
on the audio board.

igital signal board

from connector

Audio

board

Digital
signal

board

CN481

CN421

Audio

input

board

CN431

DVD

board

Video
board

CN441

Fig.5

RX-5020VBK/RX5022VSL

Tie band

Tuner

board

CN411

CN421

Tie band

CN431

Fig.8

CN441

Tuner

board

CN411

CN481

Digital
signal
board

Audio

input

board

CN421

DVD
board

CN431

Fig.6

Video
board

CN441

Fig.7

1-5

RX-5020VBK/RX5022VSL

Removing the audio board (See Fig.9)

Prior to performing the following procedure, remove
the top cover and the rear panel.

1.

Disconnect the card wire from connector CN402 on
the audio board.

2.

Disconnect the relay board from the audio board and
the power supply board. (CN291,CN491)

3.

Disconnect the harness from connector CN473,
CN471, and CN472.

4.

Remove the three screws G attaching the audio board
assembly.

5.

Remove the screw H attaching the audio board and
main board.

Removing the main board (See Fig.10)

Prior to performing the following procedure, remove
the top cover, the rear panel and audio board.

1.

Disconnect the harness from connector CN241 and
CN203 on the power supply board respectively.

2.

Disconnect the harness from connector CN251 on
the power transformer board .

3.

Remove the four screws I and the two screws J
attaching the main board.

CN473

G

CN402

G

Audio board

CN471

I

J

I

Main

board

Heat sink

CN472

K

G

Fig.9

I

Fig.10

Relay board

CN491

CN241

K

H

K

power
supply
board

CN291

Power
transformer

J

CN251

CN203

I

Removing the Heat sink
(See Fig.11 and 12)

1.

Remove the ten screws K and four screws L
attaching the heat sink.

2.

Remove the two screws M attaching the heat sink
from the rear side of main board.

1-6

L

M

Main board

rear side

L

Fig.11

M

Fig.12

Removing the power transformer

(See Fig.13)

Prior to performing the following procedures, remove
the top cover.

1.

Cut off the tie band fixing the harness.

2.

Unsolder the two harnesses connected to the power
transformer.

3.

Unsolder the harness connected to the FW201 on
the power transformer board.

4.

Remove the four screws N attaching the power
transformer.

Removing the the power / fuse board
(See Fig.13)

Prior to performing the following procedure, remove
the top cover and the rear panel.

1.

Unsolder the two harnesses connected to the power
transformer board.

2.

Remove the screw O attaching the power / fuse
board.

FW201

CN251

N

N

Solder points
(from the
power/ fuse
board)

Power cord

RX-5020VBK/RX5022VSL

Power
supply
board

Solder points

Tie band
Power

transformer
board

Tie band

Power
transformer

Power
transformer board

Tie band

O

Solder

points

Power / fuse board

Fig.13

3.

Unsolder the power cord and other harnesses
connected to the power / fuse board.

Removing the power supply board

(See Fig.14 and 15)

Prior to performing the following procedure, remove
the top cover and the front panel.

1.

Remove the one nut attaching the headphone jack of
the power supply board on the front side of the body.

2.

Disconnect the harness connected to connector
CN241,CN201,CN203 and CN291 on the power
transformer board.

3.

Remove the three screws P attaching the power
supply board and pull out the power supply board
from the front bracket backward.

4.

Unsolder the three harnesses connected to the
power supply board.

Power

supply

board

P

CN241

CN203
CN291

Hook

CN201

Headphone jack

Nut

Fig.14

Headphone jack

Power
supply board

P

Solder points

P

Fig.15

Solder points

1-7

RX-5020VBK/RX5022VSL

Removing the system control board /
power switch board (See Fig.16 to 18)

Prior to performing the following procedure, remove
the top cover and the front panel assembly.

1.

Pull out the volume knob on the front side of the front
panel and remove the nut attaching the system
control board.

2.

Remove the two screws Q attaching the power
switch board.

3.

Disconnect the harness from connector CN714 on
the power switch board.

4.

Remove the six screws R attaching the system
control board on the back of the front panel.

5.

On the back of the front panel, release the six joints
by pushing the joint tabs inward.
Remove the operation switch panel toward the front.

6.

Release the two hook attaching the system control
board.

Operation switch panel

Fig.16

R

Joint

R

Front panel assembly

Nut

Volume knob

Power switch

board

Joint

Q

Joint

Joint

Hook

Joint

Fig.17

System control board

Fig.18

Hook

Joint

CN714

1-8