JVC AV28BT7EEB, AV28BT7EES, AV28BT7ENB, AV28BT7ENS, AV28BT7EPB Schematics

AV28BT7ENS / AV28BT7ENB
AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

SCHEMATIC DIAGRAMS

COLOUR TELEVISION

AV28BT7ENS / AV28BT7ENB
AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

CD-ROM No.SML200201

CONTENTS

NOTE ON USING CIRCUIT DIAGRAMS

SEMICONDUCTOR SHAPES

BLOCK DIAGRAM

WAVEFORM DIAGRAMS

CIRCUIT DIAGRAMS

PATTERN DIAGRAMS

VOLTAGE TABLES

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

2-1

2-2

2-3

2-4

2-5

2-11

2-15

No.51883

Jan. 2002

AV28BT7ENS / AV28BT7ENB

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
foll owing conditions.

(1)Input signal : Colour bar signal

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

(3)Internal resistance of tester

:DC 20k

/V

(4)Oscilloscope sweeping time

:H

20µS/div

:V

5mS/div

:Others

Sweeping time is
specified

(5)Voltage values

:All DC voltage values

Sin ce the voltage val ues of signa l circuit vary to some exten t
according to adjustments, use them as reference values.

3.INDICATIONS ON THE CIRCUIT DIAGRAM

(1)Resistors

Resistance value

No unit :[

]

K

:[K

]

M

Ty pe

No indication

:Carbon resistor

OM R

:Oxi de metal film resistor

MFR

:Met al film resistor

MPR

:Metal plate resistor

UNFR

:Uninflammable resistor

FR

:Fusible resistor

Compositi on resistor 1/2 [W] is spec ified a s 1/2S or Comp.

(2)Capacitors

: Original setting position
when shipped

4.NOTE FOR RE PAIRI NG 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 e xample, 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 t he 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 th e circui t diag ram may not agree with th ose indicate d in
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.

Ty pe

MM

:Metalized mylar capacitor

PP

:Polypropylene capacitor

MPP

:Metalized polypropylene capacitor

MF

:Metalized film capacitor

TF

:Thin film capacitor

BP

:Bipolar electrolytic capacitor

TAN

:Tantalum capacitor

(3) Coi ls

No unit

:[

µ

H]

Others

:As specified

:[M ]

Capacitance value

1 or higher :[pF]

less than 1

:[µF]

Withstand voltage

No indication :DC5 0[V]

Others :DC withstand voltage [V]

AC indicated

:AC withstand voltage [V]

Electrolytic Capacitors

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

No indication

:Ceramic capacitor

AV28BT7ENS / AV28BT7ENB
AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

WAVEFORM DIAGRAMS

MAIN PWB

AV28BT7ENS / AV28BT7ENB

AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

Q802 D

IC401 6pin IC050 6pin IC050 17pin

8Vp-p(H) 1.7Vp-p(H) 0.7Vp-p(H) 1.4Vp-p(H)

IC401 17pin

IC401 30pin

0.7Vp-p(H) 0.8Vp-p(H) 0.9Vp-p(H) 2Vp-p(H)

IC401 20pin

IC401 21pin

2Vp-p(H) 2Vp-p(H) 1Vp-p(H) 450Vp-p(H)

0.6Vp-p(V) 4.8Vp-p(V) 0.5Vp-p(V) 1.2Vp-p

CRT SOCKET PWB

2-4

35Vp-p(H) 35Vp-p(H) 35Vp-p(H)

IC401 29pin IC401 19pin

Q605 CIC401 40pin

IC501 34pinIC701 9pinIC401 47pin IC701 1pin

IC901 9pinIC901 8pinIC901 7pin

No.51883

Jan. 2002 No. 51883

AV28BT7ENS / AV28BT7ENB

TV-TEXT CONTROLLER

SDA 555X

PLL TUNER

UV1315/6

SERVICE

CONNECTOR

CTI &

COMB FILTER

SPEAKERS

8R 6/12W

RGB AMP.

TDA 6108

8R 6/12W

I2C

AUDIO

OUTPUTS

TDA2615/6

TDA2614(MONO)

SMPS

(Mc44604)

NVM KEYPAD

VIDEO SWITCH

TEA6415

VERTICAL

OUTPUT TDA8351/6

HORIZONTAL

OUTPUT

FBT

CRT

IR.

FRONTAV

115/150VDC

+12VDCAud.

-12VDCAud.

12VDC

8VDC

5VDC

3.3V st-by

2.5V st-by

SCART1 SCART2 SVHS

VIDEO PROCESSOR

TDA 884X

MSP 34X0D

DIGITAL SOUND PROCESSOR

AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

CONTENTS

AV28BT7ENS / AV28BT7ENB

AV28BT7EES / AV28BT7EEB
AV28BT7EPS / AV28BT7EPB

BLOCK DIAGRAM

SEMICONDUCTOR SHAPES

BLOCK DIAGRAM
WAVEFORM DIAGRAMS

CIRCUIT DIAGRAMS

MAIN PWB CIRCUIT DIAGRAM
MULTISOUND PWB CIRCUIT DIAGRAM
CRT SOCKET PWB CIRCUIT DIAGRAM
FRONT CONTROL PWB CIRCUIT DIAGRAM
FRONT AV + HEADPHONE JACK PWB CIRCUIT DIAGRAM

PATTERN DIAGRAMS

MAIN PWB PATTERN
MULTISOUND, CRT SOCKET & FRONT CONTROL PWB PATTERN
FRONT AV + HEADPHONE JACK PWB PATTERN

VOLTAGE TABLES

SEMICONDUCTOR SHAPES

TRANSISTOR

BOTTOM V IEW

E
C

B

ECB

BCE

(G)(D)(S )

FRONT VIEW

ECB

ECB

IC

BOTTOM VIEW FRONT VIEW TOP VIEW

OUT
E

IN

IN OUTE

1 N

1 N

CHIP IC

TOP VIEW

N

N

1

TOP VIEW

CHIP TR

1

2-2

2-3

2-4

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

2-11
2-13

2-13

2-15

C

BE

N

2-2

N

1

N

N

No.51883No.51883

2-3