Casio tv 5100b djvu

NTSC

Anten na

V TUNER

BU

SCHEMATIC DIAGRAM & WAVEFORMS

IC200

Video DET., Sound DET., FM DET., AGC, AFT and Mute GK-a___.

AV Jack

(§H

aft!		LLD	9
		i

FM detection

rrr

4.5MHz

EXT

Jack

ANT

TTT

UHF input Circuit
VHF input Circuit

UHF RF ’ Amp.
^VH 5 Am	= RF P-

_^UHF tuning "^Circuit

VHF tuning Circuit

7K—7|V

VHF local oscillator

UHF local oscillator

IZ

UHF mixing Circuit

31

VHF mixing Circuit

SYNC.

SEP

} AFT

IF Amp.

IF output

BS(0/20V)

BT(0 ' 21V)

Power

switch

BU(4V)

BV(4V)

BV

AMP.

AGC 1.0 '3.0V

OUT

VCC2

IN

BS

GEN.

BS

Vref

GEN.

ZE

1

Current

Source

TU Vref

IC400

Tuning yoltage generator

IW	H7L	SWON
L	L	S2, S5
L	H	S3, S6
H	L	S1, S4
H	H	S1, S4

TU	SW ON
L	S7
H	S8

1

SAW filter

FM

DET.

i>i

Amp.    __

Speaker

2

TTT

F200

IF AGC DET.

VIDEO DET. “C

VIDEO

AMP.

ATT

Earphoen Jack

nr

2nd

AMP.

—

BUFFER

T/T

RF AGC Ą (Forward)

TśT

AMP.

-5R

LIMITER

□ SIF filter ^ 4.5MHz

(12;

IC700 OSC, A-D converter, Display control Auto-Tuning control

TE2 TE4 TE6

VSS2 TE1 TE3 TE5 M6 M5 M4 M3 M2 M1

AFT

A/D

\l/ \l/ \l/    Nl/ Nl/

\l/ Ni/ Ni/ Ni/ \l/ \l/

Test control

Modę control

Frequency

diyider

Channel bar control

AFT

control

Key

switch

control

KDB

KCB

AVB

UHF

Sweep

control

Mute '-Ą control

T

MTB

P-

3V

nr

Tuning voltage Up/Down counter

Synchronism

judgment

r

VLB

Pulse width modulation D/A

Frequency

separator

TU

Fuse

C-SY

Modę

control

Power

Jack

Batteries TTT

IC300

Croma Circuit

FSC APC ACC TINT CIN

VXOUT^/x’tal VXOF Killer F KO

YIN

PIX Cont ContOUT /BGPW

®    (9)

	MATRIX ( (CONTRAST)
T		T		t
R-Y DET 4 T~?~		G-Y DET.		B-Y DET. 7 ^—7 \

Phase z| comparator p

C-S

Data Output

Vertical

positioning

control

Horizontal

positioning

control

Frequency

divider

Oscillator

PD

VDD1

OSC1

OSC2

D1

±ć-±e—±i—±ć-±t—±t.

D2 d:

CDB

CNB

SNB

SCB

HDB

STB

CK1

CK2

IC702

CK1 CK2 STB SNB	D1-D3
S1-----------	----S359

D4

D6

CFB

C110

LCD

S2-----------	----S360
CK1 CK2 STB SNB	D4-D6

IC701

AV Jack

Anten na

V

TUNER

EXT

Jack

Qfc

(S) (R-Y)IQUTl

UHF input Circuit
)
VHF input Circuit

UHF RF ’ Amp.
^VH 5 Am	= RF P-

UHF tuning Circuit

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0.2V	V V

© 1 fi	20|_is u u
\ l	i Ji
2 V

20|JS

© ^ A/	O.ljas ■\ nr
U u 0.2V	U

©

0.1V

Waveforms

© —l /—	20|^S "H/■ U
^r V 2V	1i

©

20|^S

0.5V

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