JVC AV-2168TEE, AV-21LS2, AV-21LX2, AV-21LX2/A Schematics

AV-21LS2
AV-21LX2
AV-2168TEE

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

BASIC CHASSIS

CH

AV-21LS2
AV-21LX2

CD-ROM No. SML200209

POWER

MUTING

SYSTEM

COLOUR SOUND

ECO

SENSOR

DISPLAY

MENU

/

TV/TEXT

TV/VIDEO

123

OFF

TIMER

456

PICTURE
MODE

789

CHANNEL

RETURN+

SCAN

--

0-/

CHANNEL

VOLUME

TEXT

SIZE

INDEX

HOLD

REVEAL

SUBPAGE CANCEL

STORE MODE

TV

RM-C1020

RM-C1020-1H
[AV-21LS2]

RM-C1024-1H
[AV-21LX2]
[AV-21LX2

MUTING

SYSTEM

COLOUR SOUND

DISPLAY

TV/VIDEO

OFF

TIMER

PICTURE
MODE

CHANNEL

SCAN

CHANNEL

MENU

123

456

789

RETURN+

0-/

VOLUME

RM-C1024

TV

POWER

ECO

SENSOR

--

RM-C1023-1H
[AV-2168TEE]

/A

]

MUTING

SYSTEM

COLOUR SOUND

DISPLAY

MENU

TV/VIDEO

123

OFF

TIMER

456

PICTURE
MODE

789

CHANNEL

RETURN+

SCAN

0-/

VOLUME

CHANNEL

TEXT

INDEX

HOLD

REVEAL

SUBPAGE CANCEL

STORE MODE

RM-C1023

AV-21LX2 /A
AV-2168TEE

POWER

ECO

SENSOR

TV/TEXT

--

SIZE

TV

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

No. 52031

Jul. 2002

AV-21LS2
AV-21LX2
AV-21LX2 /A

AV-21LS2
AV-21LX2
AV-2168TEE

AV-2168TEE

q

NOTE ON USING CIRCUIT DIAGRAMS

STANDARD CIRCUIT DIAGRAM

1. SAFETY

The components identified by the symbol and shading are
critical for safety. For continued safety replace safety critical
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 : Color bar signal
(2)

Setting positions of each knob/button and
variable resistor

(3) Internal resistance of tester : DC 20kØ/V
(4) Oscilloscope sweeping time : H ⇒ 20µS/div

(5) Voltage values : All DC voltage values

:Original setting position when

shipped

:V ⇒ 5mS/div
: Others ⇒ Sweeping time is

specified

9Since the voltage values of signal circuit vary to some extent ac-

cording to adjustments, use them as reference values.

3. INDICATION OF PARTS SYMBOL [EXAMPLE]

•In the PW board : R1209

→

R209

Type

•

No indication : Ceramic capacitor
MY : Mylar capacitor
MM : Metalized mylar capacitor
PP : Polypropylene capacitor
MPP : Metalized polypropylene capacitor
MF : Metalized film capacitor
TF : Thin film capacitor
BP : Bipolar electrolytic capacitor
TA N:Tantalum capacitor

(3) Coils

No unit : [µH]
Others : As specified

(4) Power Supply

:B1

: B2(12V)

:9V

:5V

9Respective voltage values are indicated

(5) Test point

:Test point

: Only test point display

4. INDICATIONS ON THE CIRCUIT DIAGRAM

(1) Resistors

Resistance value

•

No unit : [Ø]
k:[kØ]
M:[MØ]
Rated allowable power

•

No indication : 1/16 [W]
Others : As specified
Type

•

No indication : Carbon resistor
OMR : Oxide metal film resistor
MFR : Metal film resistor
MPR : Metal plate resistor
UNFR : Uninflammable resistor
FR : Fusible resistor

9Composition resistor 1/2 [W] is specified as 1/2S or Comp.

(2) Capacitors

Capacitance value

•

1 or higher : [pF]
less than 1 : [µF]
Withstand voltage

•

No indication : DC50[V]
AC indicated : AC withstand voltage [V]
Others : DC withstand voltage [V]

9 Electrolytic Capacitors

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

(6) Connecting method

: Connector

:Wrapping or soldering

: Receptacle

(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 the LIVE side GND and
ISOLATED(NEUTRAL) side GND at the same time with a measur­ing apparatus ( oscilloscope, etc.). 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 cir-

•

cuit constants may be subject to change for improvement with­out any notice.

Jul. 2002 No. 52031

AV-21LS2
AV-21LX2
AV-2168TEE

CONTENTS

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

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

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM (1/3) [AV-21LS2] ....................................................................................................... 2-5

MAIN PWB CIRCUIT DIAGRAMS (2/3, 3/3) [AV-21LS2] .............................................................................................2-7

MAIN PWB CIRCUIT DIAGRAM (1/3) [AV-21LX2, AV-21LX2/A, AV-2168TEE] ....................................................... 2-9

MAIN PWB CIRCUIT DIAGRAMS (2/3, 3/3) [AV-21LX2, AV-21LX2/A, AV-2168TEE] ........................................... 2-11

PATTERN DIAGRAMS

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

MAIN PWB (CRT SOCKET) PATTERN ......................................................................................................................... 2-15

SEMICONDUCTOR SHAPES

TRANSISTOR

TOP VIEWBOTTOM VIEW FRONT VIEW

CHIP TR

E

C

B

ECB

EC

B

(G)(D)(S)

ECB

ECB

C

B

E

IC

CHIP IC

TOP VIEWBOTTOM VIEW FRONT VIEW

OUT

E

IN

IN E OUT

N

N

N

1

N

1N

TOP VIEW

1

N

1N

1N

2-2 No.52031

BLOCK DIAGRAM

AV-21LS2
AV-21LX2

AV-2168TEE

AV-21LS2
AV-21LX2
AV-2168TEE

J801

VIDEO-1

INPUT

J802,J803

COMPONENT

(VIDEO-2)

INPUT

J804

OUTPUT

TU001

TUNER

VIDEO

AUDIO L/MONO

AUDIO R

V/Y

B

C

CR

AUDIO L/MONO

AUDIO R

VIDEO OUT

AUDIO L

AUDIO R

SCL
SDA

IF

MAIN PWB

28

SF101

SAW FILTER

SF102

SAW FILTER

29,30

SCL
SDA

7

V1-V

8

V1-L

10

V1-R

3

V2-Y

1

V2-V

2

V2-L

4

V2-R

37

Vout2

36

Lout2

35

Rout2

Cout1

Yout1

IC801

VIDEO SW

MTV-V

25

27

CB

C

13

Q111 Q109

BUF

IC702

EEPROM

R

5,6

CF106

29

23

24

2,3

62,63

43

42

47

48

46

TRAP

SIF IN1

SIF IN2

IF IN1

IF IN2

IC701

V/C DEF.

PROCESSOR

SCL,SDA

SCL1
SDA1

CIN

CVBS/YIN

Y

U

V

7

ROUT

GOUT

BOUT

QSS OUT
(SIF OUT)

VDRB(-)

VDRA(+)

HOUT

IF VOUT

10,64

BUF

51

52

53

35

21,22

33

38

R

G

B

AV-21LS2

CF140

5.5 FILTER

CF141

6.0 FILTER

CF142

6.5 FILTER

Q130

BUF

BUF

Q150

CF130

4.5 FILTER

Q136

BUF

SCL
SDA

IC601

MULTI SOUND

2

PROCESSOR

AV-2LX2, AV-2168TEE

Q137

11

BUF

BUF

Q132

30,31

IC130
SOUND FM
DETECTOR

10

MAIN (CRT SOCKET)

RGB DRIVE

J770

HEADPHONE

JACK

V01

AC IN

J771-J773
FRONT IN
(VIDEO-3)

VIDEO

AUDIO L/MONO

AUDIO R

VOL+

43

V3-V

44

V3-L

42

V3-R

19

Yin1

VOL- CH+ CH- MENU

REMOCON
RECEIVER

S901

POWER SW

POWER

LED

F901

MTV-R

MTV-L

Lout1

Rout1

Vout1

15

14

26

24

23

KEY_IN

REMOTE, LED

D901
RECT

T901

SW

TRANSF.

IC901

POWER

REG

PC901

VOLTAGE

FEEDBACK

IC951

ERROR

AMP

SCL
SDA

IC972

3.3V REG

IC974

REG

L951

1

PROCESSOR

(3D SURROUND

30

& VOL/TONE)

IC401

VERT OUT

Q522

H. OUT

IC602

SOUND

8

23

3.3V_STB

5V

8V

9V

32V

B1

L, R

5

2

T551

FBT

IC650

AUDIO AMP

7

12

FOCUS1

SCREEN

EHV

SP

L

SP

R

V

DY01
DEF YOKE

H

No.520312-4No.52031 2-3