JVC RXD-301-S, RXD-302-B Service manual

MB479200510

SERVICE MANUAL

AUDIO/VIDEO CONTROL RECEIVER

RX-D301S, RX-D302B

RX-D301S

Area suffix

A ------------------------ Australia
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe

RX-D302B

Area suffix

B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

COPYRIGHT © 2005 Victor Company of Japan, Limited

No.MB479

2005/10

SPECIFICATION

Amplifier

Output Power At stereo operation Front channels 110 W per channel, min. RMS, driven into 6

1 kHz with no more than 0.8% total harmonic dis­tortion.

At surround operation Front channels 110 W per channel, min. RMS, driven into 6

Center channel 110 W, min. RMS, driven into 6

Surround channels 110 W per channel, min. RMS, driven into 6

Surround back channels 110 W per channel, min. RMS, driven into 6

Audio Audio Input Sensitivity/Impedance DVR/DVD (DVD MULTI), VCR, DBS, TV 270 mV/47 k

Audio Input (DIGITAL IN)*1 Coaxial: DIGITAL IN 1(DVR/DVD) 0.5 V(p-p)/75 Ω

Optical: DIGITAL IN 2(DBS), 3(VCR) -21 dBm to -15 dBm (660 nm ±30 nm)

USB: USB WIRELESS USB TERMINAL

Audio Output Level DVR, VCR 270 mV

Signal-to-Noise Ratio ('66 IHF/'78 IHF) 80 dB/62 dB

Frequency Response (6

Bass Boost +4 dB ±1 dB at 100 Hz

Equalization (at DSP operation) Center frequency 63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz

Video Video Input Sensitivity/Impedance Composite video: DVR/DVD, VCR, DBS 1 V(p-p)/75

Video Output Level/Impedance Composite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 Ω

Synchronization Negative

Tuning Range 87.50 MHz to 108.00 MHz

Usable Sensitivity Monaural 12.8 dBf (1.2 µV/75 Ω) for A version

50 dB Quieting Sensitivity Monaural 16.0 dBf (1.7 µV/75 Ω) for A version

Stereo Separation at REC OUT 35 dB at 1 kHz

Tuning Range 531 kHz to 1 710 kHz (at 9 kHz intervals)

Power Requirements AC 240 V ,50 Hz for A version

Power Consumption 180 W (at operation)

Dimensions (W

Mass 6.8 kg

USB WIRELESS SYSTEM The USB wireless transmitter supplied with this re-

× H × D) 435 mm × 91.5 mm × 371 mm

Ω) 20 Hz to 20 kHz (±1 dB)

Control range ±8 dB

S-video: DVR/DVD, VCR, DBS Y (luminance): 1 V(p-p)/75 Ω
Component: DVR/DVD, VCR (DBS) Y (luminance): 1 V(p-p)/75 Ω

S-video: DVR, VCR, MONITOR OUT Y (luminance): 1 V(p-p)/75 Ω
Component: MONITOR OUT Y (luminance): 1 V(p-p)/75 Ω

FM tuner (IHF)

Stereo 37.5 dBf (20.5 µV/75 Ω) for A version

AM tuner

General

1 kHz with no more than 0.8% total harmonic dis­tortion.

Ω at 1 kHz, with

no more than 0.8% total harmonic distortion.

1 kHz with no more than 0.8% total harmonic dis­tortion.

1 kHz with no more than 0.8% total harmonic dis­tortion.

Ω

Ω

C (chrominance, burst): 0.3 V(p-p)/75 Ω
PB, PR: 0.7 V(p-p)/75 Ω

C (chrominance, burst): 0.3 V(p-p)/75 Ω
PB, PR: 0.7 V(p-p)/75 Ω

17.0 dBf (1.9 µV/75 Ω) for Europe version

21.3 dBf (3.2 µV/75 Ω) for Europe version

41.3 dBf (31.8 µV/75 Ω) for Europe version

522 kHz to 1 629 kHz (at 10 kHz intervals)

AC 230 V , 50 Hz for Europe version

5.8 W (in standby mode) for A version

0.9 W (in standby mode) for Europe version

ceiver supports Direct Sequence Spreading Spec­trum (DSSS) using 2.4 GHz frequency band.

*2: Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz).
Designs and specifications are subject to change without notice.

1-2 (No.MB479)

Ω at

Ω at

Ω at

Ω at

SECTION 1

PRECAUTIONS

1.1 Safety Precautions

(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 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 manufacturers 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 ( ) 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 reassem­bling.

(5) Leakage shock hazard testing

After reassembling 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, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-

posed 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 measure 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.).

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

0.15 F AC TYPE

Place this
probe on

1500 10W

Good earth ground

1.2 Warning

(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 must 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.

1.3 Caution

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.

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen
printed 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. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)

each exposed
metal part.

(No.MB479)1-3

1.5 Safety Precautions (U.K only)

(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-

tinued 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.

(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot

accept responsibility for personal injury or property damage resulting therefrom.

(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never

be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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.

1.5.1 Warning

(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) 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.

1-4 (No.MB479)

1.6 Caution after repairs

There are two power supply as the second power supply of the transformer.
One is a power supply for power IC(3pin), and another is a power supply for the control(8pin).

+B for power IC
(3pins)

There are two power supply as the second power supply of the transformer.
One is a power supply for power IC(3pin), and another is a power supply for the control(8pin).

Please connect first of all and confirm the power supply for the control when you do the energizing examination after it completes of
the repair.

+B for control section
(8pins)

For power IC(3pins)

Please never do the energizing examination in a power supply of power IC alone.
Moreover, when the control system breaks down, power IC is occasionally damaged.

(No.MB479)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB479)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the top cover
(See Figs.1 and 2)

(1) From the both sides of the main body, remove the four

screws A attaching the top cover. (See Fig.1)

(2) From the back side of the main body, remove the five

screws B and screw C attaching the top cover. (See Fig.2)

Reference:

When removing the screw C, use a screwdriver to show
as follows.
TORX Driver: size T10
Parts number: DR-L70

(3) Remove the top cover in the direction of the arrow. (See

Fig.1.)

Top cover

A

Fig.1

[For Australia]

B

C

Top cover

B B

[For Europe]

B

C

Top cover

B B

Fig.2

(No.MB479)1-7

3.1.2 Removing the front panel assembly
(See Figs.3 and 4)

• Remove the top cover.

Reference:

Remove the tie bands and wire holder bundling the wires.
(1) Disconnect the card wire from the connector CN102

main amplifier board. (See Fig.3)

(2) Disconnect the wire from the connector CN351

amplifier board. (See Fig.3)

(3) Disconnect the wire from the connector CN552

board. (See Fig.3)

(4) Disconnect the wire from the connector CN661

ume board. (See Fig.3)

(5) Remove the three screws D attaching the front panel as-

sembly. (See Fig.3)

(6) Remove the screw D attaching the OSD connect 2 board.

(See Fig.3)

(7) From the bottom side of the main body, remove the four

screws E attaching the front panel assembly. (See Fig.4)

(8) Release the joints a and remove the front panel assembly

in the direction of the arrow. (See Fig.4)

on the

on the main

on the input

on the vol-

[For Australia]

Front panel assembly

CN102

D

CN552

Input board

[For Europe]

Front panel assembly

CN102

OSD connect 2 board

D

CN661

Volume board

OSD connect 2 board

D

Main amplifier board

D

CN351

Main amplifier board

D

D

CN552

Input board

E

a

CN351

CN661

Volume board

Fig.3

Front panel assembly

E

a

1-8 (No.MB479)

Fig.4

3.1.3 Removing the rear panel

(See Fig.5)

• Remove the top cover.

(1) From the back side of the main body, remove the strain re-

lief from the rear panel in the direction of the arrow and re­move the power cord.

(2) Remove the twenty-nine screws F attaching the rear panel.

[For Australia]

(3) Remove the thirty screws F attaching the rear panel. [For

Europe]

(4) Remove the nut and washer attaching the coaxial connec-

tor to the rear panel.

[For Australia]

Strain relief

Power cord

F

Rear panel

F

F

[For Europe]

Power cord

F

Strain relief

Rear panel

Coaxial connector

Nut and washer

Rear panel

F

Rear panel

F

F

F

Coaxial connector

Nut and washer

Fig.5

(No.MB479)1-9

3.1.4 Removing the tuner
(See Fig.6)

• Remove the top cover.

(1) Disconnect the card wire from the connector CN1 on the

tuner.

(2) From the back side of the main body, remove the two

screws G attaching the tuner to the rear panel and take out
the tuner.

3.1.5 Removing the subwoofer board
(See Fig.6)

• Remove the top cover.

(1) Disconnect the wire from the connector CN524

woofer board.

(2) From the back side of the main body, remove the screw H

attaching the subwoofer board to the rear panel and take
out the subwoofer board.

3.1.6 Removing the front video board
(See Fig.6)

• Remove the top cover.

Reference:

Remove the tie band bundling the wires.
(1) Disconnect the wire from the connector CN662

ume board

(2) From the back side of the main body, remove the two

screws J.

(3) Remove the nut and washer attaching the coaxial connec-

tor to the rear panel.

(4) Take out the front video board from the main body.

on the sub-

on the vol-

[For Australia]

Volume board

Front video board

Compulink board

K

Rear panel

Tuner

Subwoofer board

CN662

CN565

Rear panel

Coaxial connector

Nut and washer

CN524

CN1

GJ H

3.1.7 Removing the compulink board
(See Fig.6) [For Australia]

• Remove the top cover.

(1) Disconnect the wire from the connector CN565

pulink board.

(2) From the back side of the main body, remove the screw K

and take out the compulink board from the main body.

on the com-

[For Europe]

Volume board

Tuner

Front video board

CN662

Rear panel

Subwoofer board

CN524

CN1

GJ H

1-10 (No.MB479)

Coaxial connector

Nut and washer

Fig.6

3.1.8 Removing the power transformer

(See Fig.7)

• ReReference:zmove the top cover.

Reference:

Remove the tie bands bundling the wires.
(1) Disconnect the wires from the connectors (CN106

on the main amplifier board.
(2) Remove the soldered sections b and remove the wires.
(3) Remove the four screws M and take out the power trans-

former from the main body.

, CN111)

Trans primary board

b

Main amplifier board

M

CN106

CN 111

3.1.9 Removing the trans primary board
(See Fig.7)

• Remove the top cover.

Reference:

Remove the tie band bundling the wires.
(1) Remove the wires from the soldered sections b and re-

move the wires.

(2) Remove the solders from the soldered sections c and re-

move the trans primary board.

3.1.10 Removing the trans secondary board
(See Fig.7)

• Remove the top cover and power transformer.

From the side of the power transformer, remove the solders from
the soldered sections d and remove the trans secondary board.

3.1.11 Removing the DCDC control board
(See Fig.8)

• Remove the top cover.

From the top side of the main body, disconnect the connector

on the DCDC control board from the main amplifier board

CN152

in an upward direction.

Note:

When removing the DCDC control board, take care not to
break the claw of the connector on the main amplifier board.

c

d

Trans secondary
board

DCDC control board

M

M

Power transformer

Fig.7

Main amplifier board

CN152

Fig.8

(No.MB479)1-11

3.1.12 Removing the PWM modulation 1 board
(See Fig.9)

• Remove the top cover.

Reference:

Remove the tie band bundling the wires.
(1) Disconnect the wire from the connector CN413

PWM modulation 2 board.

(2) Disconnect the wires from the connectors (CN311

CN313) on the PWM modulation 1 board.

(3) Disconnect the connector CN301

1 board from the main amplifier board in an upward direc­tion.

Note:

When removing the PWM modulation 1 board, take care not to
break the claw of the connector on the main amplifier board.

3.1.13 Removing the PWM modulation 2 board
(See Fig.9)

• Remove the top cover.

(1) From the top side of the main body, disconnect the wires

from the connectors (CN411
modulation 2 board.

(2) Disconnect the connector CN401

2 board from the main amplifier board in an upward direc­tion.

Note:

When removing the PWM modulation 2 board, take care not to
break the claw of the connector on the main amplifier board.

on the PWM modulation

, CN412, CN413) on the PWM

on the PWM modulation

on the

, CN312,

Main amplifier board

CN401

CN312

CN412

CN413

PWM modulation 1 board

CN301

CN311

CN313

CN411

PWM modulation 2 board

Fig.9

3.1.14 Removing the fan motor
(See Fig.10.)

• Remove the top cover.

Reference:

Remove the tie band bundling the wires.
(1) Disconnect the wire from the connector CN103

amplifier board.

(2) Remove the two screws N and take out the fan motor as-

sembly.

(3) Remove the two screws P attaching the fan motor to the

fan bracket.

on the main

Main amplifier board

Fan motor assembly

CN103

N

Fan motor

P

P

Fan bracket

N

Fig.10

1-12 (No.MB479)

3.1.15 Removing the volume board

r

(See Fig.11)

• Remove the top cover and front video board.

(1) From the back side of the main body, remove the five

screws Q attaching the volume board to the rear panel.
(2) Remove the screw R attaching the volume board.
(3) From the top side of the main body, remove the screw S at-

taching the wire holder board and move the wire holder

board with the wires in the direction of the arrow.
(4) Disconnect the connector CN681

from the DSP connect board.

Note:

When removing the volume board, take care not to break
the claw of the connector on it.

(5) Take out the volume board and disconnect the wires from

the connectors (CN661

side of the volume board.

, CN682, CN683) on the forward

on the volume board

Wire holder board

Volume board

S

CN682

3.1.16 Removing the OSD board
(See Fig.12) [For Australia]

• Remove the top cover, front video board and volume board.

(1) Remove the solder from the section e to remove the earth

wire.

(2) Remove the screw T attaching the support bracket on the

chassis base.

(3) Disconnect the connectors (CN582

board in an upward direction.

Note:

When removing the OSD board, take care not to break
the claws of the connectors on it.

(4) Remove the screw U to remove the support bracket from

the OSD board.

3.1.17 Removing the primary board
(See Fig.12)

• Remove the top cover.

Reference:

Remove the tie bands bundling the wires.
(1) Disconnect the wire from the connector CN101

amplifier board.

(2) Disconnect the power cord from the connector CN120

the primary board.
(3) Remove the four screws V attaching the primary board.
(4) Take out the primary board from the main body and remove

the wires from the soldered sections f on the reverse side

of the primary board.

, CN584) on the OSD

on the main

on

CN683

Chassis base

CN120

V
V

Power cord

CN661

CN681

R

Rear panel

Q

Fig.11

Primary board Support bracket

VT

Main amplifie
board

CN101

f

V

CN582

Earth wire

e

U

Fig.12

CN584

OSD board

(No.MB479)1-13

3.1.18 Removing the scart board
(See Fig.13) [For Europe]

• Remove the top cover.

(1) From the back side of the main body, remove the six

screws W attaching the scart board to the rear panel.

(2) Disconnect the card wire from the connector CN537

scart board.

(3) Take out the scart board from the main body.

on the

Scart board

W

W

CN537

Rear panel

3.1.19 Removing the speaker terminal 1 and speaker terminal 2 boards
(See Fig. 14)

• Remove the top cover and rear panel.

Reference:

Remove the tuner and subwoofer board as required.
(1) From the top side of the main body, disconnect the wires

from the connectors (CN265

minal 1 board.
(2) Take out the speaker terminal 1 board from the main body.
(3) Disconnect the wires from the connectors (CN209

on the speaker terminal 2 board.
(4) Take out the speaker terminal 2 board from the main body.

, CN465) on the speaker ter-

, CN262)

Speaker terminal 2 board Speaker terminal 1 board

CN262

Fig.13

CN465CN209

CN265

Fig.14

1-14 (No.MB479)

3.1.20 Removing the DSP connect board
(See Fig.15)

• Remove the top cover, front video board and volume board.

Disconnect the connector CN602
from the input board in an upward direction.

Note:

When removing the DSP connect board, take care not to break
the claw of the connector on the input board.

on the DSP connect board

3.1.21 Removing the input board
(See Fig. 16)

• Remove the top cover, rear panel, tuner, subwoofer board,

front video board, compulink board [For Australia], volume
board, OSD board [For Australia], scart board [For Europe]
and DSP connect board.

Reference:

Remove the tie band bundling the wires.
(1) Disconnect the wire from the connector CN209

speaker terminal 2 board.

(2) Disconnect the wire from the connector CN513

connect 1 board.

(3) Disconnect the wires from the connectors (CN530, CN531,

) on the input board.

CN552

(4) Disconnect the parallel wire from the connector CN540 on

the input board.

(5) Remove the three screws X and take out the input board

from the main body.

on the

on the OSD

CN602

CN552

Input board

CN540

X

Input board

DSP connect board

Fig.15

OSD connect 1 board

CN531

CN530

X

Speaker terminal 2 board

CN513

CN209

Fig.16

(No.MB479)1-15

3.1.22 Removing the OSD connect 1 board
(See Fig.17)

• Remove the top cover, front video board and volume board.

Reference:

Remove the tie band bundling the wires.
(1) Disconnect the wire from the connector CN524

woofer board.

(2) Disconnect the wire from the connector CN513

connect 1 board.

(3) Disconnect the connector CN522

board from the main amplifier board in an upward direction.

Note:

When removing the OSD connect 1 board, take care not to
break the claw of the connector on the main amplifier board.

on the OSD connect 1

on the sub-

on the OSD

OSD connect 1 board

Main amplifier board

CN522

3.1.23 Removing the master clock board
(See Fig.18)

• Remove the top cover, tuner, front video board, PWM modula-

tion 1 board, PWM modulation 2 board, volume board and
OSD connect 1 board.
(1) Remove the two screws Y with a short driver and remove

the transistor hold from the joints g of the heat sink.

(2) Disconnect the wire from the connector CN201

amplifier board.

(3) Take out the master clock board from the main body.

on the main

CN513

Heat sink

CN201

Main amplifier board

Subwoofer board

Fig.17

Transistor hold

g

g

Y

Master clock board

Fig.18

CN524

1-16 (No.MB479)

3.1.24 Removing the main amplifier board

(See Figs.19 and 20)

• Remove the top cover, tuner, front video board, DCDC control

board, PWM modulation 1 board, PWM modulation 2 board,
volume board, OSD connect 1 board and master clock board.
(1) Disconnect the wire from the connector CN265

speaker terminal 1 board. (See Fig.19.)

(2) Disconnect the wire from the connector CN262

speaker terminal 2 board. (See Fig.19.)

Reference:

Remove the tie bands bundling the wires.

(3) Disconnect the wires from the connectors (CN101

, CN111, CN351) on the main amplifier board. (See

CN106

Fig.19.)

(4) Disconnect the card wire from the connector CN102

main amplifier board. (See Fig.19.)

(5) Disconnect the wires from the connectors (CN530

on the input board. (See Fig.20.)

(6) Disconnect the parallel wire from the connector CN540

the input board. (See Fig.20.)

(7) Remove the four screws Z and two screws AA. (See

Fig.20.)

(8) Take out the main amplifier board with the regulator board

from the main body. (See Fig.20.)

on the

on the

, CN103,

on the

, CN531)

on

CN103

CN106

CN101

Speaker terminal 2 board

Main amplifier board

CN102

CN262

Speaker terminal 1 board

Fig.19

CN 111

CN265

CN351

Regulator board

Z

CN540

Input board

CN530

AA

CN531

Fig.20

Main amplifier board

Z

Z

(No.MB479)1-17

3.1.25 Removing the regulator board
(See Fig.21)

• Remove the top cover, tuner, front video board, DCDC control

board, PWM modulation 1 board, PWM modulation 2 board,
volume board, OSD connect 1 board, master clock board and
main amplifier board.
(1) From the forward side of the main amplifier board, discon-

nect the wire from the connector CN105
(2) Remove the two screws AB attaching the regulator board.
(3) Remove the regulator board and disconnect the parallel

wire from the connector CN104

board.

3.1.26 Removing the heat sink
(See Fig.22)

• Remove the top cover, tuner, front video board, DCDC control

board, PWM modulation 1 board, PWM modulation 2 board,
volume board, OSD connect 1 board, master clock board,
main amplifier board and regulator board.
(1) From the forward side of the main amplifier board, remove

the screw AC and remove the wire holder board with the
wires.

(2) Remove the five screws AD to remove the heat sink.

.

on the main amplifier

Main amplifier board

Regulator board

CN104

CN105

AB

Fig.21

Wire holder board

AC

Heat sink

AD

Main amplifier board

AD

Fig.22

1-18 (No.MB479)

3.2 Front panel assembly section

• Remove the front panel assembly.

(See "3.1.2 Removing the front panel assembly".)

3.2.1 Removing the JOG board

(See Figs. 1 and 2)

(1) From the inside of the front panel assembly, remove the

four screws A attaching the JOG board. (See Fig.1.)

(2) Take out the JOG board while lifting it from the front panel

assembly little by little.

Reference:

The rotary knob assemblies are removed from the front
side simultaneously. (See Fig.2.)

(3) From the forward side of the JOG board, disconnect the

wire from the connector CN913

3.2.2 Removing the OSD connect 2 board

(See Fig. 1)

(1) From the inside of the front panel assembly, remove the

two screws A attaching the OSD connect 2 board.

(2) Disconnect the wire from the connector CN914

board.

. (See Fig.1)

on the FL

Front panel assembly

CN913

A

A

JOG board

A

Front panel assembly

CN914

FL board

A

OSD connect 2 board

Fig.1

3.2.3 Removing the FL board

(See Fig. 3)

• Remove the JOG board.

(1) Disconnect the wire from the connector CN914

board.

(2) Remove the eight screws A and take out the FL board.

on the FL

Rotary knob assemblies

Front panel assembly

A

A

Fig.2

Fig.3

FL board

A

A

CN914

(No.MB479)1-19

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

1-20 (No.MB479)

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

(No.MB479)1-21

Victor Company of Japan, Limited
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB479)

Printed in Japan

VPT

SCHEMATIC DIAGRAMS

AUDIO / VIDEO CONTROL RECEIVER

RX-D301S,RX-D302B

CD-ROM No.SML200510

RX-D301S

Area suffix

A ------------------------ Australia
B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe

RX-D302B

Area suffix

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

Contents

Block diagrams
Standard schematic diagrams
Printed circuit boards

B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe

2-1
2-3
2-17 to 22

COPYRIGHT 2005 Victor Company of Japan, Limited.

No.MB479SCH

2005/10

In regard with component parts appearing on the silk-screen printed 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.