JVC AV-30W476/S Schematics

SCHEMATIC DIAGRAMS

COLOR TELEVISION

AV-30W476/S

CD-ROM No.SML200503

BASIC CHASSIS

GW2

COPYRIGHT © 2005 Victor Company of Japan, Limited.

No.YA246

2005/3

AV-30W476

/S

STANDARD CIRCUIT DIAGRAM

NOTE ON USING CIRCUIT DIAGRAMS

1.SAFETY

The components identified by the symbol and shading are
critical for safety. For continued safety replace safety ciritical
components only with manufactures recommended parts.

2.SPECIFIED VOLTAGE AND WAVEFORM VALUES

The voltage and waveform values have been measured under the
following conditions.

(1)Input signal : Colour bar signal

(2)Setting positions of
each knob/button and
variable resistor

(3)Internal resistance of tester

(4)Oscilloscope sweeping time

(5)Voltage values

Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.

: Original setting position
when shipped

: DC 20kΩ/V

: H

: V

: Othters

: All DC voltage values

20µs / div

5ms / div

Sweeping time is
specified

3.INDICATION OF PARTS SYMBOL [EXAMPLE]

In the PW board

: R1209

R209

Type

No indication

MM
PP
MPP

MF
TF
BP

TAN

(3)Coils

No unit

Others

(4)Power Supply

Respective voltage values are indicated

(5)Test point

: Test point

(6)Connecting method

: Ceramic capacitor
: Metalized mylar capacitor

: Polypropylene capacitor
: Metalized polypropylene capacitor
: Metalized film capacitor
: Thin film capacitor
: Bipolar electrolytic capacitor
: Tantalum capacitor

: [µH]

: As specified

: B1

: 9V

: Connector

: Receptacle

: Only test point display

: Wrapping or soldering

: B2 (12V

: 5V

)

4.INDICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value

No unit : [Ω]

K
M

Rated allowable power
No indication : 1/16 [W]

Others : As specified

Type

No indication

OMR

MFR

MPR

UNFR

FR

Composition resistor 1/2 [W] is specified as 1/2S or Comp.

(2)Capacitors

Capacitance value

1 or higher : [pF]

less than 1

Withstand voltage

No indication : DC50[V]

Others : DC withstand voltage [V]

AC indicated
Electrolytic Capacitors

47/50[Example]: Capacitance value [µF]/withstand voltage[V]

: [kΩ]

: [MΩ]

: Carbon resistor

: Oxide metal film resistor

: Metal film resistor

: Metal plate resistor

: Uninflammable resistor

: Fusible resistor

: [µF]

: AC withstand voltage [V]

(7)Ground symbol

: LIVE side ground

: ISOLATED(NEUTRAL) side ground

: EARTH ground

: DIGITAL ground

5.NOTE FOR REPAIRING SERVICE

This model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : ( ) side GND and the
ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be
taken for the following points.

(1)Do not touch the LIVE side GND or the LIVE side GND and the
ISOLATED(NEUTRAL) side GND simultaneously. if the above
caution is not respected, an electric shock may be caused.
Therefore, make sure that the power cord is surely removed from
the receptacle when, for example, the chassis is pulled out.

(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL
side GND or never measure with a measuring apparatus measure
with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND
and ISOLATED(NEUTRAL) side GND at the same time.
If the above precaution is not respected, a fuse or any parts will be broken.

Since the circuit diagram is a standard one, the circuit and
circuit constants may be subject to change for improvement
without any notice.

NOTE
Due improvement in performance, some part numbers show
in the circuit diagram may not agree with those indicated in
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.

)

(No.YA246)2-1

CONTENTS

SEMICONDUCTOR SHAPES ...................................................................... 2-2

BLOCK DIAGRAM ........................................................................................ 2-3

CIRCUIT DIAGRAMS .................................................................................... 2-5

MAIN PWB CIRCUIT DIAGRAM ................................................................................................................ 2-5

FRONT CONTROL PWB CIRCUIT DIAGRAM ............................................................................................ 2-5

CRT SOCKET PWB CIRCUIT DIAGRAM ................................................................................................... 2-9

AV SELECTOR PWB CIRCUIT DIAGRAM ................................................................................................2-11

SIDE CONTROL PWB CIRCUIT DIAGRAM .............................................................................................. 2-11

PATTERN DIAGRAMS .............................................................................. 2-13

MAIN PWB PATTERN .............................................................................................................................. 2-13

FRONT CONTROL PWB PATTERN ......................................................................................................... 2-17

CRT SOCKET PWB PATTERN ................................................................................................................. 2-15

AV SELECTOR PWB PATTERN ............................................................................................................... 2-15

SIDE CONTROL PWB PATTERN ............................................................................................................. 2-17

USING P.W. BOARD

PWB ASS'Y name PWB ASS'Y No.

MAIN P.W. BOARD SGW-1011A-M2

CRT SOCKET P.W. BOARD SGW-3011A-M2

AV SELECTOR P.W. BOARD SGW-5011A-M2

SIDE CONTROL P.W. BOARD

FRONT CONTROL

P.W. BOARD

SGW-6011A-M2

SGW-7011A-M2

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW FRONT VIEW TOP VIEW

CHIP TR

E
C
B

ECB

IC

BOTTOM VIEW FRONT VIEW TOP VIEW

OUT
E

IN

IN OUTE

CHIP IC

N

N

N

1

N

B

(G)E(S)C(D)

TOP VIEW

1 N

1

N

ECB

ECB

1

1 N

C

BE

N

2-2(No.YA246)

BLOCK DIAGRAM

INPUT 3

INPUT 1

INPUT 2

AUDIO

AUDIO

OUT

V3

L3

R3

SIDE CONTROL

PWB

Y1/C1

V1

L1

R1

L2

R2

L

R

VTV

V1

V2

V3

Y1/C1

L1/R1

L2/R2

IC5501

AV S W

AUDIO OUT L/R

Y/C

L/R

MPX

L3/R3

MTS DECODE

V

Y/C

IC5001

TV SW

AV SELECTOR PWB

IC5201

3L DIGITAL

COMB

FILTER

MTS DECODE/AUDIO CONTROL/AUDIO SELECT

SURROUND

TONE

CONTROL

VOLUME

CONTROL

Q5901~Q5908

ROTATION

DRIVE

IC5701

D-A CONVERTER

L/R

ROTATION COIL

CRT SOCKET PWB

Q3304

R/G/B

Q3306

RGB OUT

Q3103

Q3107

Q3109

VM AMP

VM

CRT

VM COIL

INPUT 2

COMPONENT

VIDEO

TU001

TUNER

Y2/V2 V2

Pb2

Y2/Pb2/Pr2

Pr2

MPX

VTV

Y/C

R/G/B

VM

C IN

Y IN

Y2

Y2/Pb2/Pr2

IC911 IC921

POWER REG. ERROR AMP

PC921

VOLTAGE

FEEDBACK

SVM_OUT

CHROMA

PROCESS

Y PROCESS

SYNC.

SEP

Pb2/Pr2

BASE BAND

PROCESS

CUTOFF

DRIVE

RGB

SW

HORIZONTAL

PROCESS

H_OUT

H

MAIN CPU/CLOSED CAPTION DECODE/

IC201

VIDEO PROCESS/RGB PROCESS/
SYNC. SEP/DEF PROCESS

OSD R/G/B/Ys/I
GENERATE

CLOSED

CAPTION

DECODER

VERTICAL
PROCESS

V_OUT

V

EW

PROCESS

EW_OUT

EW

SCL0SDA0

MICOM

SCL1SDA1

IC702

MEMORY

V

H

IC421

V OUT

Q511

H OUT

L/R

IC651

BBE

EW

IC621

AUDIO OUT

Q541~Q543

SIDE PIN OUT

SPEAKER L

SPEAKER R

DEF

YOK E

V

H

LF901

D901

T921

SW

TRANS.

B1

B1

FOCUS

T502

HVT

SCREEN

MAIN PWB

2-4(No.YA246)(No.YA246)2-3