LC-13C2E (serv.man2). Technical Manual (tentative) - Sharp TV Service Manual (repair manual). Page 9

AV1

S-VIDEO

INPUT

V1

V2

AV2

INPUT

OUTPUT

VIDEO

SWITCH

IC402

V

SY, SC

VIDEO

IN/OUT

SWITCH

Q3501-

Q3503

V0

CVIN

CSYNC0

BUFFER

Q402

BUFFER

Q401

SYNC

SEPARATER.

IC401

MPU

IC2001

VOUT

I

2

C

3.3V REG.

VIDEO

DECODER

(VPC)
IC801

LCD

PANEL

AD-converted 
data is inputted.

Data, clock, etc. 
are inputted.

OSD data etc. is inputted.

1-3. GRAY LEVEL
CIRCUIT

1-5. LCD

CONTROLLER

CIRCUIT

RGB-converted 
data is outputted.

Gray level reference 
voltages and electrode 
signals are outputted.

The video signal or Y/C signal inputted to IC801 is AD-converted in the IC and subjected to various video
adjustments in digital signal processing.  As a Y/UV digital signal (ITU-R601 format) the Y data is outputted from
pins (31) thru (34) and (37) thru (40) and the C data (UV data) is outputted from pins (41) thru (44) and (47) thru
(50), and then they are inputted to the LCD controller circuit.

CIN

VIN1

VIN2

VIN3

VIN4

VOUT

RGB/

YCrCb

RGB/

YCrCb

FB

Analog

Front-end

AGC

2

×

ADC

Analog

Component

Front-end

4

×

ADC

Processing

Matrix

Contrast

Saturation

Brightness

Tint

Adaptive

Comb

Filter

NTSC

PAL

Color

Decoder

NTSC

PAL

SECAM

Saturation

Tint

Mixer

2D Scaler

PIP

Pehorame

Mode

Contrast

Brightness

Peaking

Output

Formatter

ITU-R656
ITU-R601

Memory

Control

Y

Cr

Cb

Y

Cr

Cb

Y/G

Y

Cr

Cb

FB

U/B

V/R

FB

Y OUT

Cr Cb
OUT

YCOE

FIFO
CNTL

LL Clock

H Sync

V Sync

AVO

I

2

C Bus

I

2

C Bus

Clock
Gen.

Sync

+

Clock

Generation

20.25MHz