JVC AXV-8000 Service manual

SERVICE MANUAL

AUDIO/VIDEO CONTROL AMPLIFIER

MB17720043

AX-V8000

Area suffix

UP --------------------------- Korea

TRANSMITLEARN

STANDBY

ON

ZONE 2

ZONE 1

ZONE 1

ZONE 2

TV/CATV/DBS

VCR 1

ON/OFF ON/OFF

STANDBY/ON STANDBY/ON

ZONE 2 LEARNZONE 1

DVD

DVD MULTI

CD

PHONO

CDR

TAPE/MD

VCR 1 VCR 2

EXT 7.1CH

FM/AMVIDEOTV/DBS

ANALOG/DIGITAL

EFFECT

INPUT

123

LIVENESS

SOUND

456

TEST

/P

89

7

STANDBY

STANDBY/ON

MASTER VOLUME

CC CONVER

AUDIO/VIDEO CONTROL AMPLIFIER

PHONES

DIMMER

DOOR

UP

DOOR

DOWN

VIDEO L—AUDIO—R

S-VIDEODIGITAL

VIDEO

CC CONVERTER

RETURN

THX

EX/ES/7.1

SLEEP DIMMER

/ REW

DOWN U P

REC

CHANNEL

TV VOL

SETUP
MENU

TEXT

DISPLAY

DVD

MENU

RM-SRXDP20J

A/V CONTROL RECEIVER

10

PLAY

TUNING

STOP PAUSE

TV/VIDEO

MUTING

SET

LIGHT

FM MODE

DSP SURR/DSPSURROUND

ANALOG DIRECT

REMOTE CONTROL

+

100

+

100

OFF

TV

CATV/
DBS

FF/

VOLUME

ADJUST
MENU

EXIT

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED

No.MB177

2004/3

SECTION 1

PRECAUTION

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.

1-2 (No.MB177)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB177)1-3

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the top cover
(See Fig.1)

(1) From the top sides of the main body, remove the nine

screws A attaching the top cover.

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

screws B attaching the top cover.

(3) Take out the top cover upward in the direction of the arrow.

3.1.2 Removing the side panel (L) & side panel (R) & stay bkt
(See Figs.1 and 2)

• Prior to performing the following procedure, remove the top

cover.
(1) From the left sides of the main body, remove the four

screws C attaching the side panel (L). (See fig.1)

(2) From the right sides of the main body, remove the three

screws C attaching the side panel (R). (See fig.1)

(3) From the top side of the main body, remove the four screws

D attaching the side panel (L) and the side panel (R). (See
fig.2)

(4) Remove the four screws E attaching the stay bkt, and take

out the stay bkt. (See fig.2)

Side panel (R) Side panel (L)

Top cover

C

C

Fig.1

Side panel(R)

E

A

B

Side panel(L)

C

DD

E

Stay bkt

Fig.2

E

1-4 (No.MB177)

3.1.3 Removing the front panel assembly

(See Figs.3 to 6)

• Prior to performing the following procedure, remove the top

cover, side panels and stay bkt.
(1) From the top side of the main body, cut off the tie band

fixing the wire. (See fig.3)

(2) Remove the three screws F attaching the front panel

assembly. (See fig.3)
(3) Remove the screw G attaching the lug wire. (See fig.3)
(4) From the bottom side of the main body, remove the four

screws H attaching the front panel assembly and take out

the front panel assembly forward. (See fig.4)
(5) From the front side of the main body, disconnect the wire

from the connectors CN971

on the system control board. (See fig.5)
(6) From the reverse side of the front panel assembly,

disconnect the wire from the connector CN973

AV in board. (See fig.6)
(7) Disconnect the wire from the connector CN373

DIGITAL in board. (See fig.6)

Reference:

When attaching the screws F and screw G, attach the lug wire
with it.

, CN977, CN983 and CN985

on the front

on the front

G

(fixing the
lug wire)

H

F

Front panel assembly

Tie band

Fig.3

CN973

Front panel
assembly

Fig.4

System control board

CN985

CN971CN977CN983

Fig.5

CN373

Front AV in board

Front DIGITAL in board

Fig.6

(No.MB177)1-5

3.1.4 Removing the rear panel
(See Fig.7)

• Prior to performing the following procedure, remove the top

cover, side panels and stay bkt.
(1) From the top side on the main body, remove the protect

cover and the solders from the two solder points on the AC
inlet.

(2) From the bottom side on the main body, remove the four

screws J attaching the rear panel.

(3) From the back side on the main body, remove the forty-six

screws K, two screws L and three screws M attaching each
board to the rear panel.

3.1.5 Removing the audio signal 3 board & compu link board
(See Figs.7 and 8)

• Prior to performing the following procedure, remove the top

cover, side panels and stay bkt.
(1) From the top side of the main body, cut off the tie band

fixing the wire. (See fig.8)

(2) Disconnect the wire from the connector CN201

audio signal 1 board. (See fig.8)

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

screws L attaching the audio signal 3 board to the rear
panel. (See fig.7)

(4) From the top side of the main body, disconnect the wire

from the connector CN302
fig.8)

(5) Disconnect the wire from the connector CN207

audio signal 1 board. (See fig.8)

(6) From the back side of the main body, remove the three

screws M attaching the compu link board to the rear panel.
(See fig.7)

on the compu link board. (See

on the

on the

K

Rear panel

K

Solder part

Protect cover

K

K

K

J

AC inlet

L

Fig.7

Black

Red

K

M

K

J J

KK

3.1.6 Removing the Y/C separator board
(See Fig.9)

• Prior to performing the following procedure, remove the top

cover, side panels and stay bkt.
(1) From the top side of the main body, cut off the tie band

fixing the wire.

(2) Disconnect the connectors CN481

separator board, and take out the Y/C separator board
upward.

1-6 (No.MB177)

and CN482 on the Y/C

CN201
CN207

Audio signal

1 board

Tie bands

CN482

CN481

Tie bands

Fig.8

Fig.9

CN302

Audio signal

3 board

Y/C separator

Compu link

board

board

3.1.7 Removing the system control board

(See Figs.10 and 11)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt and front panel assembly.
(1) From the top side of the main body, cut off the tie bands

fixing the wires. (See fig.10)

(2) Disconnect the wire from the connector CN45

2 board . (See fig.10)

(3) Disconnect the wire from the connector CN25

power/ fuse board. (See fig.10)

(4) Disconnect the wire from the connector CN234

the audio signal 1 board. (See fig.10)

(5) From the front side of the main body, disconnect the wires

from the connector CN963
system control board. (See fig.11)

(6) Remove the three plastic rivet, and take out the system

control board. (See fig.11)

, CN964 and CN981 on the

on the power

on the

, CN208 on

CN234

CN208

Tie bands

System control board Plastic rivetPlastic rivet

Power 2 board

Power/ fuse boardAudio signal 1 board

Fig.10

CN45

Tie
bands

CN25

3.1.8 Removing the DSP 1 board & DSP 2 board & shield cover

(See Fig.12)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt, front panel assembly and rear
panel.
(1) From the top side of the main body, disconnect the

connector CN631

(2) Disconnect the connector CN203

board, and cut off the tie bands fixing the wire.

(3) Remove the two plastic rivet, and disconnect the connector

, CN643 on the DSP 2 board, and disconnect

CN633
CN635 on the DSP 1 board.

(4) Remove the screw N attaching the barrier to the shield

cover, and take out the shield cover.

on the DSP 2 board.

on the audio signal 1

(Top view)

N

CN981

Fig.11

CN963

Barrier

Shield cover

CN631

CN203

DSP 1

CN964

board

CN633

DSP 2 board

CN635CN643 Plastic rivet

Audio signal 1 board

Fig.12

(No.MB177)1-7

3.1.9 Removing the audio signal 1 board
(See Fig.13)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt, front panel assembly and rear
panel, DSP 1 board, DSP 2 board and shield cover.
(1) From the top side of the main body, disconnect the wires

from the connectors CN202

CN208, CN218 and CN223 on the audio signal 1 board.

(2) Remove the plastic rivet, and disconnect the connectors

, CN221 and CN206 on the audio signal 1 board.

CN205

(3) Take out the audio signal 1 board.

, CN204, CN234, CN224,

Plastic rivet

CN224

CN234

CN208

CN218

CN223

CN204

CN205

CN202

3.1.10 Removing the audio signal 2 board & video board & S video board & component video board & D5 video board
(See Figs.14 and 15)

• Prior to performing the following procedure, remove the top

cover, rear panel, front panel assembly, Y/C separator board,
DSP 1 board, DSP 2 board, shield cover and audio signal 1
board.
(1) From the top side of the main body, disconnect the wire

from the connector CN324
(See fig.14)

(2) Disconnect the audio signal 2 board from the connector

and CN6 on the main board. (See fig.15)

CN15

(3) Disconnect the video board from the connector CN7 on the

main board. (See figs.14 and 15)

(4) Disconnect the S video board from the connector CN8

the main board. (See figs.14 and 15)

(5) Disconnect the wire from the connector CN502 on the

component video board. (See fig.14)

(6) Disconnect the component video board from the connector

on the main board. (See fig.15)

CN9

(7) Disconnect the D5 video from the connector CN10

main board. (See figs.14 and 15)

on the audio signal 2 board.

on

on the

Video board

CN324

S video board

Main board

Main board

CN206

CN221

Fig.13

Audio signal 1 board

CN502

Audio signal 2 board

Fig.14

Component
video board

D5 video board

1-8 (No.MB177)

CN15

CN6

CN7

CN8

Fig.15

CN10

CN9

3.1.11 Removing the main board

(See Figs.16 and 17)

• Prior to performing the following procedure, remove the top

cover, rear panel, front panel assembly, Y/C separator board,
DSP 1 board, DSP 2 board, shield cover, audio signal 1 board,
audio signal 2 board, video board, S video board, component
video board and D5 video board.
(1) From the top side of the main body, cut off the tie bands

fixing the wire. (See fig.16)

(2) Disconnect the wire from the connector CN62

regulator board. (See fig.16)

(3) Disconnect the wire from the CN44

(See fig.16)

(4) Disconnect the wire from the connector CN743

speaker relay board. (See fig.17)

(5) Disconnect the card wire from the connector CN1

and the wire from the connector CN11 on the main board.
(See fig.16)

(6) Remove the seven screws P attaching the main board, and

take out the main board. (See fig.16)

3.1.12 Removing the speaker relay board

(See Fig.17)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt and rear panel.
(1) Disconnect the wire from the connector CN741

and CN743 on the speaker relay board.

on the power 2 board .

on the

on the

, CN2

, CN742

CN2

CN1 CN11

P

Main board

Regulator board

CN743

Fig.16

Power 2 board

CN62

Speaker relay board

CN44

3.1.13 Removing the regulator board

(See Fig.18)

• Prior to performing the following procedure, remove the top

cover, side panels and stay bkt.
(1) From top side of the main body, disconnect the wires from

the connectors CN61
the regulator board.

(2) Disconnect the wires from the connectors CN44

on the power 2 board.

(3) Remove the six screws Q attaching the regulator board.

Reference:

When attaching the screw Q, attach the lug wire with it.

, CN62, CN63, CN64 and CN65 on

and CN45

CN743 CN742CN741

Speaker relay board

Fig.17

CN62

CN65 CN64

CN61

Regulator boardQCN45

CN44

Fig.18

Power 2 boardCN63

Q

(No.MB177)1-9

3.1.14 Removing the power transformer 1 with the power 2 board
(See Fig.19)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt and regulator board.
(1) From top side of the main body, disconnect the wire from

the connector CN46

(2) Remove the two screws R attaching the power transformer

1.

and CN47 on the power 2 board.

Power transformer 1

CN47

Power 2 board

CN46

3.1.15 Removing the thermal SW 1 board
(See Fig.19)

• Prior to performing the following procedure, the top cover, side

panels, stay bkt and regulator board.
(1) From top side of the main body, remove the screw S

attaching the thermal SW 1 board.

3.1.16 Removing the power transformer 2
(See Figs.20 and 21)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt and regulator board.
(1) From the top side of the main body, disconnect the wire

from the connector CN701
fig.20)

(2) Remove the solder points PW81 and PW82 on the power

trans 1 board. (See fig.21)

(3) Remove the four screws T attaching the power transformer

2. (See fig.21)

on the power amp. board. (See

Thermal SW

1 board

S

Fig.19

Fig.20

Power trans 1

board

R

Power amp. boardCN701

PW81 PW82

1-10 (No.MB177)

T

Power transformer 2

T

Fig.21

3.1.17 Removing the power transformer 3 with the power 1 board

V

V

(See Fig.22)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt, regulator board, power
transformer 1 and power transformer 2.
(1) From the top side of the main body, disconnect the wire

from the connector CN41

(2) Remove the two screws U attaching the power transformer

3.

3.1.18 Removing the power/ fuse board

(See Fig.23)

• Prior to performing the following procedure, remove the top

cover, side panels, stay bkt, rear panel, regulator board and
power transformer 2.
(1) From the top side of the main body, disconnect the wire

from the connector CN25
(2) Remove the four screws V attaching the power/ fuse board.
(3) Remove the solder from the points PW21

and PW24 on the power/ fuse board.

on the power 1 board.

on the power/ fuse board.

, PW22, PW23

CN25

Power transformer 3

U

PW23 (red)

Power 1 board

CN41

Fig.22

PW21 (blue)

V

Power/ fuse board

PW24 (white)

PW22 (brown)

Fig.23

(No.MB177)1-11

3.1.19 Removing the head phone board
(See Figs.24 and 25)

• Prior to performing the following procedures, remove the top

cover, side panels, stay bkt and front panel assembly.
(1) From the top side of the main body, disconnect the wires

from the connector CN738
fig.25)

(2) From the front side of the main body, remove the nut a

fixing the head phone board. (See fig.24)

(3) Remove the screw W attaching the lug wire and bracket.

(See fig.24)

Reference:

When attaching the screw W, attach the lug wire with it.

3.1.20 Removing the power amp. assembly
(See Figs.25 and 26)

• Prior to performing the following procedures, remove the top

cover, side panels, stay bkt, rear panel, front panel assembly,
system control board, DSP 1 board, DSP 2 board, audio signal
1 board, audio signal 2 board, video board, S video board, V
compo 1 board and speaker relay board.
(1) From top side of the main body, remove the three screws

X fixing the barriers, and remove the tow barriers. (See
fig.25)

(2) Remove the eight screws Y attaching the power amp.

assembly. (See figs.25 and 26)

(3) Take out the power amp. assembly in the direction of the

arrow. (See fig. 26)

on the power amp. board. (See

Lug wire

W

Barrier

X

Bracket

Nut a

Head phone board

Fig.24

X

Power
amp.
assembly

Power
amp.
board

Y

CN738

Y

Fig.25

Power amp. assembly

1-12 (No.MB177)

Y

Fig.26

3.2 Power amp. assembly section

• Remove the power amp. assembly from the main body.

(See "Removing the power amp. assembly".)

3.2.1 Removing the relay board & Rch amp. board & Lch amp. board & Cch amp. board & SL/SRch amp. board

(See Figs.1 to 3)

(1) From the top side of the amp. assembly, disconnect the

wires from the two connectors on each thermal
compensation board. (See fig.1)

(2) From the bottom side of the amp. assembly, remove the

two screws A attaching the relay board. (See fig.2)

(3) Disconnect the wires from the five connectors on each

thermal compensation board. (See fig.2)

(4) Disconecct the connectors CN712

CN813, CN772, CN773, CN752 and CN753 on the each

amp. board of Lch, Cch, SL/SRch and Rch from the power
amp. board. (See fig.2)

(5) From the top side of the relay board, disconnect the each

amp. board from the connectors CN721
and CN761 on the relay board. (See fig.3)

, CN713, CN812,

, CN821, CN781

Cch amp. board

Fig.1

ConnectorsLch amp. board

A

Thermal
compensation
board

Connectors

Thermal
compensation
board

CN713

CN813

CN773

CN753

Power amp. board

Cch amp. board

Lch amp. board

CN721

A

Relay board

Fig.2

CN712

CN812

CN772

CN752

SL/SRch amp. board

Rch amp. board

SL/SRch amp. board

Rch amp. board

CN761CN821

CN781

Fig.3

Relay board

(No.MB177)1-13

3.2.2 Removing the thermal SW 2 board
(See Fig.4)

• Prior to performing the following procedure, remove the relay

board and the each amp. board of Lch, Cch, SL/SRch, Rch.
(1) From the top side of the amp. assembly, remove the screw

B attaching the thermal SW 2 board.

3.2.3 Removing the heat sink
(See Figs.4 to 6)

• Prior to performing the following procedure, remove the relay

board and the each amp. board of Lch, Cch, SL/SRch, Rch.
(1) From the both sides of the amp. assembly, remove the

eight screws C attaching the heat sink. (See fig.4)

(2) From the top side of the amp. assembly, remove the eight

screws D attaching the power ICs. (See fig.5)

(3) From the bottom side of the amp. assembly, remove the

twenty screws D attaching the power ICs. (See fig.6)

D D

Heat sink

Thermal SW 2 board

Heat sink

B

C(both sides) C(both sides)

Fig.4

Fig.5

D D

Heat sink

1-14 (No.MB177)

Fig.6

3.3 Front panel assembly section

• Remove the front panel assembly from the main body.

(See "Removing the front panel assembly".)

3.3.1 Removing the FL display board & front AV in board

(See Figs.1 and 2)

(1) From the front side of the front panel assembly, pull out the

volume knob to the forward and remove the nut a attaching
the FL display board. (See fig.1)

(2) From the reverse side of the front panel assembly, remove

the three screws A attaching the front AV in board and take
out the front AV in board. (See fig.2)

(3) Remove the nine screws B attaching the FL display board.

(See fig.2)

(4) Disconnect the wires from the connectors CN969

and CN982 on the FL display board. (See fig.2)

, CN975

Front panel assembly

Front AV in board

B

A

Volume knob

Fig.1

FL display board

CN982 CN969 CN975

B

Fig.2

Nut a

(No.MB177)1-15

3.3.2 Removing the power switch board & front DIGITAL in board & motor assembly
(See Fig.3)

• Prior to performing the following procedure, remove the FL

display board.
(1) From the reverse side of the front panel assembly, remove

the four screws C attaching the power switch board and
take out the power switch board.

(2) Remove the screw D attaching the front DIGITAL in board

and take out the front DIGITAL in board.

(3) Remove the three screws E attaching the motor assembly

on the back of the front panel assembly.

(4) Remove the belt and the two screws F attaching the motor

assembly.

3.3.3 Removing the door input board
(See Figs.3 and 4)

• Prior to performing the following procedure, remove the FL

display board.
(1) From the reverse side of the front panel assembly, remove

the four screws G attaching the door and take out the door
to the forward. (See fig.3)

(2) From the reverse side of the door, remove the six screws

H attaching the door input board. (See fig.4)

Front DIGITAL

D

in board

H

Power switch board

GG

DoorCN373

Motor assembly

Fig.3

E

Belt

C

F

Door input board Door

Fig.4

1-16 (No.MB177)

SECTION 4

ADJUSTMENT

4.1 Adjustment of idling current

Measuring point Alignment point Measuring condition

Lch B903

Rch B911

Cch B907 & B908 VR801

SLch B907 & B908 VR771

SRch B909 & B910 VR772

SBLch B901 & B902 VR702

SBRch B913 & B914 VR752

Attention:

This adjustment does not obtain a correct adjustment value immediately after the amplifier is used (state that an internal temperature
has risen).
Please adjust immediately after using the amplifier after turning off the power supply of the amplifier and falling an internal temper­ature.

Adjustment method

(1) Prior to turning the power ON, fully turn the adjusting resistor (VR701

terclockwise direction and connect the DC voltmeter to the measuring terminal (B901-B902, B903-B904, B905-B906, B907-

B908, B909-B910, B911-B912, B913-B914).

(2) Adjust the resistor so that the measured value becomes 2.0mV just after the power supply is turned on.
(3) Adjust the resistor so that the measured value becomes 2.5mV more than 60 seconds after the power supply is turned on.
(4) After stability is 1.0-4.0mV.

Refer to following page "Idling Current graph".

NOTE:

It is not abnormal though the idling current might not become 0mA even if it is finished to turn variable resistance (VR701

VR751, VR752, VR771, VR772, VR801) in the direction of counterclockwise.

& B904 VR701 No load and No signal.Rated line voltage

& B912 VR751

SURROUND : OFF
Room temperature : 20 to 25 ºC

, VR702, VR751, VR752, VR771, VR772, VR801) coun-

, VR702,

VR701 (Lch)

VR801 (Cch)

VR771 (SLch)

VR751 (Rch)

B901, B902 (SBLch)

B903, B904 (Lch)

VR702 (SBLch)

B905, B906 (SLch)

B907, B908 (Cch)

VR772 (SRch)

B909, B910 (SRch)

VR752 (SBRch)

B911, B912 (Rch)

B913, B914 (SBRch)

(No.MB177)1-17

4.2 Idling Current graph (1/2)

4

3.5

3

2.5

2

1.5

1

Voltage at measering point(mV)

0.5

SL ch / SR ch

SL ch

SR ch

0

0 8 10 12 14642

4

3.5

3

2.5

2

1.5

1

Voltage at measering point(mV)

Time(Min)

SBL ch / SBR ch

SBL ch

SBR ch

0.5

0

0 8 10 12 14

1-18 (No.MB177)

642

Time(Min)

4.3 Idling Current graph (2/2)

4

3.5

3

2.5

2

1.5

1

Voltage at measering point(mV)

0.5

L ch / R ch

L ch

R ch

0

0 8 10 12 14642

4

3.5

3

2.5

2

1.5

1

Voltage at measering point(mV)

Time(Min)

C ch

0.5

0

0 8 10 12 14642

Time(Min)

(No.MB177)1-19

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-20 (No.MB177)

(No.MB177)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.MB177)

Printed in Japan

WPC

SCHEMATIC DIAGRAMS

AUDIO/VIDEO CONTROL AMPLIFIER

AX-V8000

CD-ROM No.SML200402

Area suffix

UP --------------------------- Korea

TRANSMITLEARN

STAND B Y

ON

ZONE 2

ZONE 1

ZONE 1

ZONE 2

TV/CATV/ D BS

VCR 1

ON/OFF ON/OFF

STAND BY / ON STANDBY/O N

ZONE 2 LEARNZONE 1

DVD

DVD MULTI

CD

PHONO

CDR

TAPE/MD

VCR 1 VCR 2

EXT 7 .1 CH

FM/AMVIDEOTV/ D BS

ANALOG/DIGIT AL

EFFECT

INPUT

123

LIVENESS

SOUND

456

TEST

/P

89

7

STAN D BY

STAND B Y / O N

MASTER VOLUME

CC CONVER

AUDIO/VIDEO CONTROL AMPLIFIER

PHONES

DIMMER

DOOR

UP

DOOR

DOWN

VIDEO L—AUDIO— R

S-VID EODIGITAL

VIDE O

CC CONVER TER

RETURN

THX

EX/ES/ 7.1

SLEEP DIMM ER

/ REW

DOWN U P

REC

CHANNEL

TV VOL

SETU P
MENU

TEXT
DISPLAY

DVD

MENU

RM-SRXDP20J

A/V CONTR OL RECEIVER

10

PLAY

TUNING

STOP PAUSE

TV/VIDEO

+

100

+

100

FM MODE

DSP SURR/DSPSURROUND

OFF

ANALOG DIRECT

TV

CATV/

DBS

FF/

VOLUME

MUTING

ADJUST
MENU

SET

EXIT

LIGHT

REMO TE CO NT ROL

Contents

Block diagram
Standard schematic diagrams
Printed circuit boards

COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LTD.

2-1
2-2
2-13 to 23

No.MB177SCH

2004/2

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

Block diagram

DIGITAL

IN1 to 3

DIGITAL

IN4 to 6

DIGITAL

OUT

DIGITAL

IN7

DVD

REAR

DVD

C/SW

DVD

FRONT

CDR

P. B

CDR
REC

TAPE/MD

P. B

TAPE/MD

REC

CD

PHONO

DSP 1 section

IC673

DIR & Selector

IC674

Selector

IC675

DIT

WR636

CN373

Audio signal input 1 section

SUB.VI L/R

V SIG L/R

IC202
IC203

Source

Selector

IC201

EQ

FRONT
L/R

TUNER-L/R

CN207

System control LSI /
FL display section
(Power sw)

KEY

WR970

System control LSI /
FL display section
(Input select sw)

KEY

System control LSI /
FL display section
(COMPU link)

TUNER-L/R

AV COMPU

LINK

COMPU

LINK

WR302

CN302

Primary / Regulator section

WR26

AC IN

AC220V

IC681
A/D DIR
Selector

CN651 CN652

IC666

DSP

IC671

Local

MICON

IC211

A/D SW

A/D.L/R, A/D.C/SW
A/D.SL/SR, A/D.SBL/SBR

CN641 CN642 CN635

RY277

RY273

RY272

RY271

RY276

RY275

RY274

Audio signal input 2
section (ZIST circuit)

WR700

CN201

ZIST.L/R
ZIST.C/SW
ZIST.SL/SR
ZIST.SBL/SBR

IC701 to IC704

System control LSI /

FL display section

(FL display)

CN969 CN982

IC962
Display
MICON

DI961

FL Display

Primary / Regulator section
(Audio power supply)

Q61, Q62
Audio+18V REG.
Audio-18V REG.

D61 to D64

AC-DC

DCS, AV_VCR

RY21

T21

Trans.

CN61

Q22

SW REG.

D21 to D24

AC-DC

DSP 2 section

IC657

to

IC659

SW

CN631 WR632

WR204

CN203

IC224

Volume

IC223

Volume

IC222

Volume

IC221

Volume

Amp

System control LSI /
FL display section

WR986 WR984

CN985 CN983

WR961 WR962

CN62

Main

Trans.

CN25

IC635, IC640
IC645, IC650

CC

Convertor

IC634, IC639
IC644, IC649

DAC

DSP.L/R, DSP.SBL/SBR
DSP.C/SW, DSP.SL/SR

CN223

CN202 CN204 CN221

FRONT
L/R

C/SW

SURR.
L/R

SURR.B
L/R

IC961
System
Control
MICON

B+5V D+5V

Primary / Regulator section
(Digital power supply)

CN44

CN45

CN41

Primary / Regulator section
(Video power supply)

TV/DBS

VCR1

REC

VCR1

P. B

VCR2

REC

VCR2

P. B

7.1CH

FRONT

L/R

C/SW

SURR.

L/R

SURR.B

L/R

Primary/Regulator
section (Main)

CN5 CN3

CN963 CN964

CN1 CN2

WR13 WR12

T41

Trans.

CN47 CN46

WR41 WR42

VIDEO+5V REG.

T42

Trans.

Audio signal input 2
section

IC321
IC322

Source

Selector

WR322

V SIG L/R

SUB.VI L/R

Q329,Q330,Q351

VIDEO+5V

A+18V, A-18V

VIDEO L/R

Q323,Q324

Mute

CN321

CN11

WCN5

CN8 CN7CN10 CN9WR14CN6

IC44

D+5V REG.

D4001 to D4004

AC-DC

Q53

D41

AC-DC

Pre main
amp section
(Relay)

WR323

CN325

WR702WR701 WR703

PROTECT
RYHP

IC481

Y/C

Separator

V. SE PA

Video signal
input 2 section
(Y/C Separator)

CN482 CN481

Pre main amp section (Lch/SBLch amp)

CN711

CN721 CN761 CN781 CN821

IC601

Pre AMP

IC602

Q1710, Q1711

Pre AMP

Pre main amp section (Rch/SBRch amp)

CN751

IC603

Pre AMP

IC604

Q1760, Q1761

Pre AMP

Pre main amp section (SLch/SRch amp)

CN771

IC605

Q1610, Q1611

Pre AMP

IC606

Q1660, Q1661

Pre AMP

Pre main amp section (Cch amp)

IC607

Pre AMP

CN811

PROTECT, RYHP

Video signal input 1 section

WR453 CN451 CN452

VIDEOC, VIDEOY

MAIN1, MAIN2, MAIN3, MAIN4
SUB1, SUB2, SUB3

V.MIX, SEPA.C, SEPA.Y
V.OSDIN, V.OSDOUT

Video signal input 2 section

WR403

VIDEO

MAIN1, MAIN2, MAIN3, MAIN4

CN401 CN402

SUB1, SUB2, SUB3

OSDCLK
OSDDATA

IC405

V.OSDIN
V.OSDOUT

OSD

IC402

V. MI X
V. SE PA

IC404
Video

Selector

Q710, Q711

Lch AMP

SBLch AMP

Q760, Q761

Rch AMP

SBRch AMP

SLch AMP

SRch AMP

Q810, Q811

Cch AMP

IC461

to

IC464

Selector

(Y Block)

IC465

to

IC468

Selector

(C Block)

IC401

Video

Selector

Power amp section

CN722 CN723 CN762 CN763 CN782 CN783

CN712 CN713

CN752 CN753

CN772 CN773

CN812 CN813

CN822 CN823

J451

TV / DBS

J401

R

P

J402

R

P

J403

DVD

MONITOR

J401

TV / DBS

R

P

J402

R

P

J403

DVD

MONITOR

Q714, Q715

Lch AMP

Q1714, Q1715

SBLch AMP

Q764, Q765

Rch AMP

Q1764, Q1765

SBRch AMP

Q1614, Q1615

SLch AMP

Q1664, Q1665

SRch AMP

Q814, Q815

Cch AMP

Protector

VCR1

VCR2

VCR1

VCR2

Q772

Power amp section(Speaker)

WR731

Lout

WR732 WR733 WR734 WR735 WR736 WR737 CN738

Rout

CN741

Cout

SLout

SRout

SBLout

CN742

SBRout

CN743

WR85

RY751

CN973

Video signal input 3 section

CN561

IC561

IC562

Selector

L1-1, L2-1, L3-1
SL1-1, SL2-1, SL3-1

L1-2, L2-2, L3-2
SL1-2, SL2-2, SL3-2

L1OUT, L2OUT
L3OUT, SL1OUT
SL2OUT, SL3OUT

Video signal input 3 section
(Component)

CN501

OSD.Y, OSD.C

IC502

Y/C

Component

Converter

IC503

OSD

RY901

RY902

RY906 CENTER

RY904

RY905

Q1991 to Q1996

Protector

Primary/Regulator
section (Headphone)

HPL, HPR

System control LSI /
FL display section
(Front)

VIDEO L/R
VIDEO
VIDEOC
VIDEOY

CN562

CN502

OUTCr
OUTCb
OUTY

Cr3
Cb3

RY501

to

RY506

SW

Y3

L

FRONT

SPK1

R

L

FRONT

SPK2

R

L

SURROUND

R

L

S.BACK

R

J471
VIDEO

VIDEO L/R

C-VIDEO

S-VIDEO

J561

VIDEO2
IN D

J562

VIDEO3
IN D

J563

VIDEO
OUT D

J503
VIDEO OUT

Y

Cb

Cr

J502
VIDEO3 IN

Y2

Cb2

Cr2

J501
VIDEO1 IN

Y1

Cb1

Cr1

2-1