DOWNLOAD LG RT-32LZ50CK (CHASSIS:ML-041A) Service Manual ↓ Size: 2.47 MB | Pages: 27 in PDF or view online for FREE

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VCT49xyI

VCTI

MPS7720

AMP

M52758

S/W

MST9883

ADC

FLI2300

RAM

SM5301

GM5221

SCALER

ROM

DVI

R,G,B

3

3

R

G

B

8

8

8

PC_R,G,B

3

PC_R,G,B

DVI

8

3

R,G,B

HD_Y

,Pb,Pr 

HD_Y

,Pb,Pr

3

R

L

SIDE_COMP

SIDE_Y

,C

HD_COMP

 _ 

L,R

CVBS_L,R

PC_ LR

LA7222C

SIDE_ LR

3

R,G,B

R,G,B

CVBS_IN

P

A

L-IF

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The video controller unit receives the video signal inputted to the tuner, AV port (AV1, AV2, S-Video and
component) and converts it to the analog RGB signal through the microcomputer (VCTI) combined with the
video decoder that integrates various functions in one chip.

Y,Pb,Pr signal from the component jack goes directly to the switch( SM5301) which makes switching between
the two signals YpbPr and RGB which comes form the vcti.Output of this switch depends on the selected
mode.If the mode selected is component the it gives YPbPr as the output otherwise it gives RGB signal.

Then, it is inputted to the AD converter (AD9883) and generates the 4:4:4 format digital signal. This digital signal
is inputted to the picture enhancer (FLI2300), which processes the video signal and converts the image quality
enhanced data to an analog RGB signal again before displaying it. 

The image quality enhanced de-interlace signal is inputted to the scaler (GM5221) and converted to the LVDS
signal by the integrated LVDS IC before being sent to the LCD module.

VCTI is the main microcomputer that processes both video signals and sound signals. It also processes the RF
signal received from the tuner.

The scaler enables to adjust timing on the LCD panel, as well as an adjustment of the size and position of the
input signal.

The graphic controller unit receives the PC (analog RGB) input and the DVI-D (digital signal), and sends the PC
input to the scaler analog port and DVI-D input to the digital port.

The scaler receives two inputs and converts them to the LVDS signal before sending to the module.

The power unit supplies 33V, 24V and 12V DC power to the main board. 33V DC power is used for the tuner,
whereas 24V DC power is directly used by the inverter and the sound amplifier IC. 24V DC power is also used
to generate 5V through the regulator. 12V DC power is used for the LCD panel.
5V DC is converted to 3.3V and 1.8V through the regulator, which supplies the necessary power to various ICs,
such as VCTI, scaler, FLI2300 and AD9883.

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P1

100

P802

CN4

P812

P809

P810

CN2

CN1

P1601

P1602

CN5

P106

P101

P750

P202

14Pin

12Pin

12Pin

12Pin

10Pin

6Pin

5Pin

3Pin

P105

1

2

3

4

5

6

7

8

9

6631T11020N

6631T20032S

6631T20032T

6631T25019K

6631T20033F

6631T20033T

6631T20033A

6631T20033E

6631T20033D

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