JVC AV16N81/VT, AV-16N81G/VT, AV-20N81/VT, AV-21D81/VT Schematics

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

AV-21D81 AV-20N81 AV-16N81

AV-16N81G

AV-21D81/VT AV-20N81/VT AV-16N81/VT AV-16N81G/VT

CD-ROM No.SML200112

BASIC CHASSIS

CL-M

[AV-16N81G/VT]

CONTENTS

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

[AV-20N81/VT] [AV-16N81/

VT]

[AV-21D81/

VT]

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

No.51902

Dec. 2001

AV-21D81 AV-20N81

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

(4)Oscilloscope sweepi ng time

20µS/div

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

]

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

: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

:M eta lized mylar cap ac i tor

:Polypropylene capacitor

MPP

:Metalized polypropylene capacitor

:Metalized film capacitor

:Thin film capacitor

:Bipolar electrolytic capaci tor

TAN

:Tantalum capacitor

(3)Coils

No unit

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)

AV-16N81 AV-16N81G

CONTENTS

AV-21D81 AV-20N81

AV-16N81 AV-16N81G

SEMICONDUCTOR SHAPES

BLOCK DIA GRAM CIRCUIT DIAGRAMS

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

P ATTERN DIAGRAMS

MAIN PW B PAT TERN CRT SOCKET PATTERN

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW

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

CHIP IC

2-2

E C

OUT E IN

ECB

IN OUTE

BCE

(G)(D)(S)

FRONT VIEW

1 N

TO P VI EW

ECB

No.51902

TO P VI EW

CHIP TR

ECB

1 N

2-2 2-3

2-5 2-7 2-9 2-11

2-13 2-15

Dec. 2001 No. 51902

BLOCK DIAGRAM

CF103

4.5MH

VIDEO

AMP

IC701

MICRO

COMPUTER

IC201 V/C DEF. PROCESSOR

R G B

MAIN PWB

CRT SOCKET

PWB

R / G /B

IC702 MEMORY

IC651 AUDIO AMP

FRONT IN VIDEO-3

FRONT

CONTROL PWB

OSD

V01

CRT

SCL SDA

REG.

T921

TRANSF.

Q971

LOW-B SW

IC941

ERROR AMP

IC921

POWER

REG.

PC921

VOLTAGE

FEEDBACK

D901

RECT

DY(V)

DY(H)

DEF.YOKE

OUT

ECO SENSOR

REMOCON RECEVER

KEY

LED

P SW

SCL SDA

IC202

AUDIO SW

L.OUT

R.OUT

RF-IN RF-IN

R.IN

L.IN

IC602

VOL&TONE

IC601

SURROUND

(L)

(R)

(L)

(R)

(V)

(L/R)

(L)

(R)

CF106

6.0 TRAP

Q208

BUFFER

IC101

P.IF/S.IF

DETECTOR

SF102

CF601

4.5 TRAP

CF604

5.5MHz FILTER

Q604

SIF AMP

TUNER

SF101

T101

VCO (CW)

Q101

AMP

1110

SAW FILTER

SAW FILTER(PAL)

(A)

(V)

V-IN V-IN

S-IN

FM OUT

V-OUT

VCC

SIF OUT

SIF IN

LINE OUT

VIDEO-1

4 53 141312

AC IN

ENA,DATA,CLOCK,LOCK

1 13

IC421

VERT.OUT

Q522

H.OUT

FBT

FOCUS

SCREEN

EHV

H.OUT

V.OUT

V-OUT

V-IN

56 1

TV IN

SCL SDA

Q 102

CF104, 105

5.5/6.5 TRAP

Q107

BUFFER

CF608

6.5MHz FILTER

AV-21D81 AV-20N81

AV-16N81 AV-16N81G

AV-21D81 AV-20N81 AV-16N81 AV-16N81G

No.51902

2-3 2-4

No.51902

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