JVC AV-2124EE, AV-21ETG2 Schematics

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

BASIC CHASSIS

AV-21ETG2

CG

AV-2124EE

CD-ROM No.SML200112

AV-21ETG2
AV-2124EE

CONTENTS

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

COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.

2-1
2-2
2-3
2-7
2-9

No.51893

Nov. 2001

AV-21ETG2

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 critical
components only with manufactures recommended parts.

2.SPECIFIED VOLTAGE AND WAVEFORM VALUES

The voltage and waveform values have been measured under the
follo win g c onditions.

(1)Input signal : Colour bar signal

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

(3)Internal resistance of test er

:DC 20k

/V

(4)Oscil loscope sweeping 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 indicatio n :1/ 16 [W]
Others :As specified

Type
No indicatio n

:Carbon resistor

OMR

:Oxide me tal film res istor

MFR

:Metal film resistor

MPR

:Metal plate resistor

UNFR

:Uninflammable resistor

FR

:Fusible resistor

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

(2)Capacitors

: Original setting position
when shipped

5.NO T E FOR REPAIR IN G SERVICE

This mod el's power cir cuit is pa rtly diffe rent in th e 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 an d 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 no t short between the LIVE sid e 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 a nd
circuit constants may be subject to c hange for i mprovement
without any notice.

NOTE
Due improvement in performance, some part numbers show
in th e ci rcui t diag ram may not agre e wi th tho se i ndic ate d i n
the part list.
When ordering parts, pl ease use t he numbers t hat appear
in the Parts List.

Type

MM

:M eta lized mylar cap ac i tor

PP

:Polypropylene capacitor

MPP

:Metalized polypropylene capacitor

MF

:Metalized f ilm capacitor

TF

:Thin film capacitor

BP

:Bipolar electrolytic capacitor

TAN

:Tantalum capacitor

(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)Connec ting metho d

:Connector

:Wrapping or soldering

:Receptacle

(7)Ground symbol

:LIVE side ground
:ISOLATED(NEUTRAL) side g round
:EARTH ground
:DIGITAL ground

:[M ]

Capacitance value

1 or higher :[pF]

less than 1

:[µF]
Withstand voltage
No indication :DC 50[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-2124EE

CONTENTS

AV-21ETG2

AV-2124EE

SEMICONDUCTOR SHAPES

BLOCK DIA GRAM
CIRCUIT DIAGRAMS

MAIN PWB CI RCUI T DIAGRAM

P ATTERN DIAGRAMS

MAIN PWB & CRT SOCKET PATTERN

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIE W

E
C

B

ECB

BCE

(G)(D)(S)

IC

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

CHIP IC

2-2

OUT
E
IN

N

N

N

1

N

IN OUTE

FRONT VI EW

1 N

TO P VI EW

ECB

1

N

No.51856

TO P VI EW

CHIP TR

ECB

1 N

1

2-2
2-3

2-5

2-9

C

BE

N

Nov. 2001 No. 51893

BLOCK DIAGRAM

Q102

IF AMP

SF101

VIDEO

AUDIO

IC701

MICRO COMPUTER

IC201

1 CHIP DECODER

RGB

10.11.12

29

30

38

24

MAIN PWB

IC702

MEMORY

IC651

AUDIO AMP

SP

AUDIO

3

8

OSD
RGB

SF102

SCL/SDA

B1

IC421

VERT.OUT

Q522

H.OUT

DY(V)

DY(H)

DEF.YOKE

H.OUT V.OUT

H.OUT

V.OUT

42

46

SCL
SDA

POWER SW

IN

OUT

AC IN

Q103

SW

HEAD

PHONE

CF901

30.31.32

SAW

EXT
RGB

TU001

TUNER

IF

T921

SW

TRANSF.

IC921

POWER

REG.

PC921

VOLTAGE

FEEDBACK

IC941

ERROR

AMP

IC971

9V REG.

REG.

D901

RECT

R / G /B

V01

CRT

CRT SOCKET PWB

RGB
DRV

ECO

REMOCON

KEY

IND.

VIDEO

AUDIO

T522

HVT

FOCUS

SCREEN

EHV

B1

SP

18.19

3.58/
OTH

25

37.38

6.7.8

VIDEO

IN

VIDEO

OUT

AUDIO

IN

AUDIO

OUT

SCL
SDA

SP

OUT

VIDEO

AUDIO

REAR

FRONT

IN

IC972

5V REG.

REG.

AV-21ETG2

AV-2124EE

AV-21ETG2
AV-2124EE

No.51893

2-3 2-4

No.51893