JVC AV-27320/S/R, AV-27330/S/R, AV-27S33/S/R Schematics

SCHEMATIC DIAGRAMS

COLOR TELEVISION

AV-27320 AV-27330 AV-27S33

AV-27320/S/R AV-27330/S/R AV-27S33/S/R

CD-ROM No.SML200206

BASIC CHASSIS

RM-C205

[AV-27320]

RM-C255 [AV-27330] [AV-27S33]

CONTENTS

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

2-1 2-2 2-3 2-7 2-11 2-13

No.51937

May 2002

AV-27320

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 recommende d 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 sweeping time

20µS/div

5mS/div

:Others

Sweeping time is specified

(5)Voltage values

:All DC voltage values

Since the voltage values of signal circuit vary to some extent 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

]

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 resi stor 1/2 [W] is specified as 1/2S o r Comp.

(2)Capacitors

: Original setting position when shipped

5.NOT E FOR REPAIRING SERVI CE

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 ci rcuit and circuit constants may be subject to change for improvement 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 point

: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 v oltage 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-27320

/S/R

,AV-27330

/S/R

,AV-27S33

/S/R

AV-27330 AV-27S33

CONTENTS

AV-27320 AV-27330

AV-27S33

SEMICONDUCTOR SHAPES

BLOCK DIA GRAM CIRCUIT DIAGRAMS

MAI N PWB CIRCUI T DIAGRAM MAIN & CRT SOCKET PWB CIRCUIT DIAGRAM

P ATTERN DIAGRAMS

MAIN & CRT SOCKET PWB PATTERN

CHANNEL CHART CHANNEL CHART

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW

E C

(US) (CA)

ECB

BCE

(G)(D)(S)

FRONT VIEW

ECB

TO P VI EW

ECB

CHIP TR

2-2 2-3

2-7 2-9

2-11

2-13 2-14

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

OUT E IN

IN OUTE

CHIP IC

2-2

1 N

TO P VI EW

No.51937

1 N

May 2002 No. 51937

BLOCK DIAGRAM

AV-27320 AV-27330

AV-27S33

AV-27320 AV-27330 AV-27S33

VIDEO AUDIO

INPUT 1

COMPO-

-NENT INPUT

AUDIO

OUT

L1 R1

Pb Pr

L R

Y/C

Y/Pb/Pr

TU001

TUNER

Y/C

L1/R1

L2/R2

VTV

IC101

IF DET

IC851

AV SW

MPX

IC603

Y C

Y/C OUT

L/R OUT

IC251

Y/C SEP

L/R

Y/C

RM SW

V2 L2 R2

R/G/B

L/R

R/G/B

Q301

Q321

CRT

INPUT 2

VIDEO AUDIO

RGB DRV

CRT SOCKET

PWB

(Within MAIN PWB)

AC IN

MAIN PWB

LF901

D901

IC901

POWER IC

IC702

MEMORY

Y/Pb/Pr

T921

SW.

TRANSF.

IC201

MICOM/V/C/DEF

IC602

AUDIO AMP

L , R

L R

SP L

SP R

Q521

H.OUT

IC421

VERT OUT

DY01

T521

HVT

FOCUS SCREEN

(ITC)

No.51937

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No.51937

+ 6 hidden pages