JVC AV-21DMX, AV-21DMX/-A Schematics

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

AV-21DMX

AV-21DMX
AV-21DMX

CD-ROM No.SML200111

BASIC CHASSIS

CL

/-A

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
2-5
2-11

No.51880

Nov. 2001

AV-21DMX

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
following con ditions.

(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)Oscilloscope sweepi ng 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.INDICATIONS ON THE CIRCUIT DIAG RAM

(1)Resistors

Resistance value
No unit :[

]

K

:[K

]

M

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

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

(2)Capacitors

: Original setting position
when shipped

5.NOT E FOR REPAIRING SERVI CE

This mod el's power cir cuit is pa rtly diffe rent 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 and
circ uit con stant s may be subj ect to chan ge f or i mprovem ent
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 film capacitor

TF

:Thin film capacitor

BP

:Bipolar electrolytic capaci tor

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 po int

:Only test point display

(6)Connecting method

:Connector

:Wrapping or soldering

:Receptacle

(7)Ground symbol

:LIVE side ground
:ISOLATED(NEUTRAL) side gro und
: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)

CONTENTS

AV-21DMX

SEMICONDUCTOR SHAPES

BLOCK DIA GRAM
CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM(Tuner,Micro computer & Front control )
MAIN PWB(Picture & Audio) & CRT SOCKET PWB CIRCUIT DIAGRAM
MAIN PWB CIRCUIT DIAGRAM(Power & Deflection)

P ATTERN DIAGRAMS

MAIN PW B PAT TERN
CRT SOCKET PATTERN

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW

E
C

B

IC

B O TT OM VI EW F R O NT V IEW TO P VI EW

CHIP IC

2-2

OUT
E
IN

N

N

N

1

N

ECB

IN OUTE

BCE

(G)(D)(S)

FRONT VIEW

1 N

TO P VI EW

ECB

1

N

No.51880

TO P VI EW

CHIP TR

ECB

1 N

1

2-2
2-3

2-5
2-7
2-9

2-11
2-13

C

BE

N

Nov. 2001 No. 51880

BLOCK DIAGRAM

TUNER

Q101

AMP

SAW FILTER

SF101

SAW FILTER(PAL)

SF102

Q 102

SW

4
5

7

V-IN
V-IN

S-IN

FM OUT

SIF OUT

IC101

P.IF/S.IF

DETECTOR

Q208

BUFFER

V-OUT

VCC

VCC

SIF IN

18

16

15

13

1110

AV-21DMX AV-21DMX

(V)

CF106

6.0 TRAP

T101

CF604

5.5MHz FILTER

VCO
(CW)

(A)

CF104, 105

5.5/6.5 TRAP

CF606

6MHz FILTER

SIF AMP

CF103

4.5MH

Q604

SP

02

Z

CF601

4.5 TRAP

Q107

BUFFER

CF608

6.5MHz FILTER

IC651
AUDIO AMP

R

L

1 13

L

6

R

8

SP

01

FRONT

CONTROL PWB

ECO
SENSOR

REMOCON
RECEVER

KEY

IN

VIDEO-1

V
1

L1

R1

LINE
OUT

V

L

R

LED

R G B

(L)

(R)

47

TV IN

REG.

B1

H.OUT

Q522

H.OUT

V.OUT

IC421

VERT.OUT

FBT

FOCUS

SCREEN

EHV

R / G /B

P SW

VIDEO

AMP

CRT SOCKET

PWB

13

IC701

MICRO

COMPUTER

IC702
MEMORY

SCL
SDA

ENA,DATA,CLOCK,LOCK

(L)

1

(R)

19

IC202

AUDIO SW

L.IN

10

7

R.IN

L.OUT
R.OUT

RF-IN
RF-IN

11

8

5

12

D901

RECT

IC601

SURROUND

OSD

SCL
SDA

3

5

(L)

(R)

TRANSF.

(L/R)

T921

SW

IC201
V/C DEF.
PROCESSOR

V-IN

V-OUT

56 1

11

6

SCL
SDA

H.

OUT

4 53 141312

(V)

IC602

VOL&TONE

Q971

LOW-B SW

IC941

OUT

V.

17

16

ERROR AMP

V01

CRT

AC IN

V

L

R

FRONT IN
VIDEO-3

DY(V)

IC921

POWER

REG.

PC921

VOLTAGE

FEEDBACK

MAIN PWB

DY(H)

DEF.YOKE

No.51880

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No.51880