JVC AV-14F43/BK, AV-20N43/BK, AV-21D43/BK Schematics

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

BASIC CHASSIS

AV-21D43/BK
AV-20N43/BK

AV-21D43
AV-20N43

AV-14F43

CG

[RM-C368GY]

[AV-14F43

AV-14F43/BK

CD-ROM No.SML200209

/BK] [AV-20N43/BK] [AV-21D43/BK]

CONTENTS

NOTE ON USING CIRCUIT DIAGRAMS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
PATTERN DIAGRAMS

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

2-1
2-2
2-3
2-5
2-13

No.52036

Aug. 2002

AV-21D43

STANDARD CIRCUIT DIAGRAM

AV-21D43

/BK

AV-20N43

/BK

AV-14F43

/BK

NOTE ON USING CIRCUIT DIAGRAMS

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 : Colour bar signal
(2)Setting positions of

each knob/button and
variable resistor

(3)Internal resistance of tester

:DC 20k

/V

(4)Oscillosco pe swe eping time

:H

20µS/div

:V

5mS/div

:Others

Sweeping time is
specified

(5)Voltage values

:All DC voltage values

Sin ce th e vo l tage val ue s of si gn a l cir cui t va ry to some ex ten t
according to adjustments, use them as reference values.

3.INDICATION OF PARTS SYMBOL [EXAMPLE]

In the PW board

:R1209

R209

4.IND ICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value
No unit :[

]

K

:[K

]

M

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

Type
No indic ation

:Carbon resistor

OMR

:Oxide metal film resistor

MFR

:Metal film resisto r

MPR

:Metal plate resistor

UNFR

:Uninflammable resi stor

FR

:Fusible resistor

C omposition r esistor 1/2 [W] is specified as 1/2S or Comp.

(2)Capacitors

: Original setting position
when shipped

5.NOT E FOR REPAIR ING S ERVI CE

This model's power circuit is partly di fferent 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 ci rcuit an d
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 i ndicated in
the part list.
When ordering parts, plea se use the numbers t hat appear
in the Parts List .

Type

MM

:M etal ized mylar capa c i tor

PP

:Polypropylene capacitor

MPP

:Metalized polypropylene capacitor

MF

:Metalized film capacitor

TF

:Thin film capacitor

BP

:Bipolar electrolytic capacitor

TAN

:Tant alum capacit or

(3)Coils

No unit

:[

µ

H]

Others

:As specified

(4)Power Supply

:B1

:9V

:5V

Respective voltage values are indicated

(5)Test point

:T est point

:Only test point display

(6) Connecting method

:Connector

:Wrapping or sold eri ng

:Receptacle

(7)Ground symbol

:LIVE side ground
:ISOLATED(NEU TRAL) side ground
:EARTH ground
:DIGITAL ground

:[M ]

Capacitance value
1 or higher :[pF]

less than 1

:[µF]
Withstand voltage
No indication :DC50[V]

Others :DC withstand voltage [V]
AC indicated

:AC withstand voltage [V]
Electrolytic Capacitors

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

No indication

:Ceramic capacitor

:B2 (12V)

AV-20N43
AV-14F43

AV-21D43
AV-20N43

AV-14F43

No.52036

Aug. 2002 No. 520362-16

AV-21D43
AV-20N43
AV-14F43

CONTENTS

AV-21D43
AV-20N43

AV-14F43

CRT SOCKET PWB PATTERN

SEMICONDUCTOR SHAPES

BLOCK DIA GRAM
CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRA M

P ATTERN DIAGRAMS

MAIN PW B PATTERN

CRT SOCKET PWB PATTERN

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIE W

E
C

B

ECB

BCE

(G)(D)(S )

FRONT VIEW

ECB

ECB

TO P VI EW

CHIP TR

C

BE

2-2
2-3

2-5

2-13
2-15

TOP

8

6

3

W270

E

5

3

R

C354

3

6

3

R

5

3

R

-4

P

T

R366

Q351

B

4

C

7

L351

/R

G

7

R360

SCREEN

T

G2

R

/G

R

7

-4

P

3

C

3

C

6

3

3

W

5

G2

R

3

5

3

R356

1

5

R359

2

RK

GK

B

5

6

3

BK

R362

R

L354

MARK

1

R369

4

U

NEAMX5 94V-0

C

E

6

5

3

C

HE

Q353

H

3

5

3

L

IC

B O TT OM VI EW F R O NT VIEW TO P VI EW

OUT

E

IN

IN OUTE

1 N

1 N

CHIP IC

TO P VI EW

N

N

N

1

N

1

N

R364

R346

1

N

C357

D356

W

R
R

D352

7

3

3

R351

B

5

4

3

2

5

3

3

5

3

D

6

7

5

W

3

R

R349

3

L

2

5

C

Q352

R3

E

7

4

8

4

3

R

GK

R361

55

C

W338

RK

G1

G1

5

5

3

8

5

3

R

1

5

3

K

4

5

3

D

R

A

M

7

6

3

R

5

HE

5

5

3

D

T

K

1

SK351

BK

H

2

H

-E

9

4

3

1

F

K

C

D351

G1

TP-47B

E1

-1
1

\4

/2

2

0

\4

TP-E

2-2

No.52036No.52036

2-15