JVC AV-21YN14/P, AV-21YT14/P Schematics

SCHEMATIC DIAGRAMS

FLAT COLOR TELEVISION

YA14320049

AV-21YN14/P,
AV-21YT14

CD-ROM No.SML200412

[AV-21YT14/P][AV-21YN14/P]

/P

BASIC CHASSIS

CW

COPYRIGHT © 2004 Victor Company of Japan, Limited

No.YA143

2004/12

AV-21YN14

/P

, AV-21YT14

/P

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

: R209

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.YA143)2-1

CONTENTS

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

USING P.W.BOARD.........................................................................................2-2

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

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM [AV-21YN14/P] (1/3) ................................................................................ 2-5

MAIN PWB CIRCUIT DIAGRAM [AV-21YN14/P] (2/3),(3/3) ........................................................................ 2-7

MAIN PWB CIRCUIT DIAGRAM [AV-21YT14/P] (1/3) ................................................................................. 2-9

MAIN PWB CIRCUIT DIAGRAM [AV-21YT14/P] (2/3),(3/3)........................................................................2-11

PATTERN DIAGRAMS

MAIN PWB PATTERN [AV-21YN14/P] ...................................................................................................... 2-13

MAIN PWB PATTERN [AV-21YT14/P] ...................................................................................................... 2-15

VOLTAGE CHART ........................................................................................ 2-17

WAVEFORMS ............................................................................................... 2-18

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW FRONT VIEW TOP VIEW

CHIP TR

E
C
B

ECB

B

(G)E(S)C(D)

ECB

ECB

C

BE

IC

BOTTOM VIEW FRONT VIEW TOP VIEW

OUT
E

IN

IN OUTE

1 N

1 N

CHIP IC

TOP VIEW

1

N

1

N

USING P.W. BOARD

P.W. BOARD ASS 'Y NAME AV-21YN14/P AV-21YT14/P

MAIN P.W. BOARD SCW-1346A-H2 SCW-1345A-H2

1

N

2-2(No.YA143)

BLOCK DIAGRAM

VIDEO-1

INPUT

[AV-21YN14/P]

[AV-21TY14/P]

OUTPUT

[AV-21YN14/P]

OUTPUT

[AV-21YT14/P]

VIDEO-2

INPUT

(FRONT)

[AV-21YN14/P]

VIDEO-2

INPUT

(FRONT)

[AV-21YT14/P]

AC IN

VIDEO-1

AUDIO-1

VIDEO-1

INPUT

VIDEO-OUT

AUDIO-OUT

VIDEO2

AUDIO2

AUDIO-L

AUDIO-R

J801

J801

J802

J804

VIDEO

J806

J807

J806

VIDEO

J807

J808

MAIN PWB

IC701 MAIN MICRO COMPUTER /

IF.VIDEO.RGB.SYNC.DEF. PROCESS

CVBS1

TU001

TUNER

IF

SCL
SDA

IC702

MAIN MEMORY

SF101

SAW FILTER

SF102

SAW FILTER

108,109

127,128

102,103

98,99

119

29, 30

24, 25

97

SCL1, SDA1

SCL0, SDA0

TIMER

PW_LED

REMOTE

KEY_IN

SIF IN

VIF IN

SIF DETECT

VIF DETECT/AGC/AFT

SOUND TRAP

I2C

BUS

I/O

PORT

MICRO

COMPUTER

DIGITAL SIGNAL PROCESS

PEAKING SCAN

VELOCITY MOD.

U/V DELAY

SKIN TONE

U/V TINT

SATURATION

RRGGB

OSD
SELECT

ROUT

GOUT

BOUT

85

86

87

[AV-21YN14/P]

L1

VIDEO

SELECT

58

51

49

50

34

35

48

36

37

Y1/CVBS

V3

L1

R1

L3

R3

V_OUT

L_OUT

R_OUT

AUDIO

SELECT

CVBS1

V

L1

L

R1

R

V-OUT

L-OUT

V-OUT

L-OUT

L

R-OUT

R

V3

L3

V3

L3

POWER

F901

TIMER

LED

LED

R3

POWER SW

REMOCON
RECEIVER

VOL+

VOL- CH+ CH- MENU

S901

VIDEO

C

IDENT.

Y

COMB FILTER
Y DELAY ADJ.

AUDIO

SELECT

COLOUR

DEMOD

CONTROL

AUDIO

D901
RECT

IC921

POWER

REG

B-Y R-Y

BASE-BAND
DELAY LINE

SYNC

SEP.

A_L

A_R

T921

SW

TRANSF.

PC901

VOLTAGE

FEEDBACK

60

61

RGB MATRIX

GAMMA

V. DRIVE

H. DRIVE

IC972

3.3V REG

IC975

5V REG

IC973

12V REG

IC951

ERROR

AMP

B

&

1.8V REG

1.8V REG

L951

VDRA+, VDRB-

IC974

IC976

3.3V_STB

5V

HOUT

22, 23

67

1.8V

V1.8V

8V

12V

32V

[AV-21YT14/P]

AUDIO AMP

[AV-21YT14/P]

3

AUDIO AMP

9

1, 7

B1

T522

FBT

IC601

IC601

IC401

V. OUT

Q522

H. OUT

53

1323L_AOUT

R_AOUT

5

FOCUS

SCREEN

EHV

R

G

IC351

B

RGB OUT

MAIN PWB
(CRT SOCKET)

J809

HEADPHONE

SPEAKER L

SPEAKER R

V

DEF YOKE

H

V01

J809

HEADPHONE

SPEAKER L

SPEAKER R

DY01

2-4(No.YA143)(No.YA143)2-3