JVC AV-21KT1BEF/A /B, AV-21KT1BNF/A /B, AV-21KT1BPF/A /B, AV-21KT1SEF/A /B, AV-21KT1SNF/A /B Schematics

...

AV-21KT1BEF

/A, /B

, AV-21KT1SEF

/A, /B

AV-21KT1BNF AV-21KT1BPF

/A, /B

, AV-21KT1SNF

/A, /B

, AV-21KT1SPF

/A, /B

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 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 20k

:Others

:All DC voltage values

20µS/div

5mS/div

Sweeping time is specified

3.INDICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value

No unit :[

K M

Type

No indication

OMR

MFR

MPR

UNFR

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

(2)Capacitors

Capacitance value

1 or higher :[pF]

less than 1

]

:[K

:[M ]

:Carbon resistor

:Oxide metal film resistor

:Metal film resistor

:Metal plate resistor

:Uninflammable resistor

:Fusible resistor

:[µF]

Withstand voltage

No indication :DC50[V]

Others :DC withstand voltage [V]

AC indicated

Electrolytic Capacitors

47/50[Example]:Capacitance value [µF]/withstand voltage[V]

Type

No indication

MM PP MPP MF TF BP

TAN

(3)Coils

No unit

Others

:AC withstand voltage [V]

4.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.

:Ceramic capacitor :Metalized mylar capacitor

:Polypropylene capacitor :Metalized polypropylene capacitor

:Metalized film capacitor :Thin film capacitor

:Bipolar electrolytic capacitor

:Tantalum capacitor

:As specified

No.52134

Oct. 2003 No. 52134

2-1

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

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

CIRCUIT DIAGRAMS .................................................................................... 2-5

MAIN PWB CIRCUIT DIAGRAM ............................................................................................................... 2-5

FRONT AV PWB CIRCUIT DIAGRAM .................................................................................................... 2-19

HEADPHONE PWB CIRCUIT DIAGRAM ............................................................................................... 2-20

PATTERN DIAGRAMS ................................................................................ 2-21

MAIN PWB PATTERN ............................................................................................................................. 2-21

FRONT AV PWB PATTERN ..................................................................................................................... 2-23

HEADPHONE PWB PATTERN................................................................................................................ 2-24

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM VIEW FRONT VIEW TOP VIEW

CHIP TR

E C B

ECB

(G)E(S)C(D)

ECB

BOTTOM VIEW FRONT VIEW TOP VIEW

OUT E

IN OUTE

1 N

CHIP IC

TOP VIEW

2-2

No.52134

BLOCK DIAGRAM

TU201

PLL/VST TUNER

I2 C

IC700

STEREO SOUND

IC301(STEREO) IC401(MONO)

AUDIO AMP

IC701

HP AMP

SERVICE

CONNECTOR

IC500

EEPROM

(MEMORY)

KEYPAD

SENSOR

IC501

CONTROLLER

+115V B+

QSS

IC403

VIDEO PROCESSOR

VIDEO

SWITCHING

MONO

IC900

RGB AMP

IC600

VER AMP

CRT

VER. DEFL.

AC IN

IC800 SMPS

+12V +8V

CIRCUITS

Q603

HOR. DEFL.

HOR DRIVE

+5V

SVHS FAV

+5V STBY

SCART1

SCART2

No.52134 No.52134

2-42-3

TR601

FBT

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM [1/6]

IC501

µ CONTROLLER

0V 0V 0V 0V

MEMORY

(EEPROM)

4.8V

4.8V 4.7V 4.6V

4.8V

1.6V

4.8V

0.7V

1.0V

4.8V

4.7V

4.6V

0.1V

0.3V

0.6V

1.3V

0.4V

4.8V

4.7V

0.5V

1.4V

1.8V

0.5V

4.5V

0.4V

0.7V

4.9V

0.1V

IC 501 40

2.5V 6.2V 0V 4.7V 0V 4.9V 4.9V 0V 26.9V 0V 0V

IC 501 41

4.5

MAIN PWB (1/6)

(µ CONTROLLER)

VE-20124223 VE-20124225 VE-20121220

(AV-21KT1BEF/A, AV-21KT1SEF/A) (AV-21KT1BNF/A, AV-21KT1SNF/A) (AV-21KT1BPF/A, AV-21KT1SPF/A)

4.8V4.8V

4.1V

VE-20133635 VE-20129865 VE-20129808

0.6V

3.6V

4.8V

0.2V

4.8V

4.5V

0.8V

1.1V

1.3V

0.6V

4.8V

(AV-21KT1BEF/B, AV-21KT1SEF/B) (AV-21KT1BNF/B, AV-21KT1SNF/B) (AV-21KT1BPF/B, AV-21KT1SPF/B)

No.52134 No.52134

2-5 2-6

MAIN PWB CIRCUIT DIAGRAM [2/6]

IC403

VIDEO PROCESSOR

MAIN PWB (2/6)

(VIDEO PROCESSOR)

VE-20124223 VE-20124225 VE-20121220

VE-20133635 VE-20129865 VE-20129808

(AV-21KT1BEF/A, AV-21KT1SEF/A) (AV-21KT1BNF/A, AV-21KT1SNF/A) (AV-21KT1BPF/A, AV-21KT1SPF/A)

(AV-21KT1BEF/B, AV-21KT1SEF/B) (AV-21KT1BNF/B, AV-21KT1SNF/B) (AV-21KT1BPF/B, AV-21KT1SPF/B)

IC401

AUDIO AMP

(STEREO)

IC301

AUDIO AMP

(MONO)

7.2V

14.5V

4.92V

4.7V

1.3V

14.6V

7.3V

7.2V

IC 403 30

0.6V

4.8V

4.4V 0V

4.9V

IC 403 31

IC 403 32

IC 403 48

2.2V

7.8V

2.9V

2.4V

4.3V

1.6V

3.1V

2.2V

2.4V

2.6V

1.8V

3.8V

4.9V

3.0V

2.3V

3.8V

7.9V

3.6V

3.1V

2.4V

3.1V

1.6V

3.8V

4.9V

4.6V

4.7V

4.0V

0.2V

2.5V

6.0V

5.5V

4.7V

3.1V

4.3V

2.3V

0.1V

4.1V

4.2V

5.1V

4.3V

IC 403 47

No.52134 No.52134

2-82-7

2.4V

1.6V

2.4V

2.2V

2.3V

4.3V

+ 9 hidden pages

JVC AV-21KT1BEF/A /B, AV-21KT1BNF/A /B, AV-21KT1BPF/A /B, AV-21KT1SEF/A /B, AV-21KT1SNF/A /B Schematics

STANDARD CIRCUIT DIAGRAM

CONTENTS

BLOCK DIAGRAM

CIRCUIT DIAGRAMS