LG FLATRON M3701C, Руководство по обслуживанию

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Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
DESCRIPTION OF BLOCK DIAGRAM
1. AV INPUT SELECTION CIRCUIT
1) AV(Video) INPUT SELECT : This section is
composed of Video switching IC
(CXA2040AQ_IC513) and peripheral devices.
Video switching IC(CXA2040AQ_U201) selects
CVBS video or S-video and the signal is sent to
Scaler IC(IC101).
2) AV Sync Detection : This section is composed of
Sync Separator IC(LA7217M_IC509) and peripheral
devices.
Av input selection block sends selected signal to
Sync detection block then sync detection block
identifies if AV signal is present or not. And this
block sends this information to Scaler(Micom).
2. Component INPUT
Component input signal was connected from input jack
to scaler directly.
3. RGB INPUT OUTPUT CIRCUIT
1) D-SUB RGB INPUT OUTPUT : This section is
composed of RGB Input Output Jack(P503),
Schmitt trigger inverter IC(IC507), OP-AMPs(IC510,
IC511, IC512) and peripheral devices.
RGB input signal path was connected from input
jack to Scaler directly. But scaler receives RGB
Sync signal via schmitt trigger inverter IC.
RGB output signal was made by OP-Amp ICs. And
this sends output signal to RGB output jack.
4. HDMI INPUT CIRCUIT
This section is composed of TMDS receiver
IC(ANX9021_IC508), ESD protection
diode(CM2021_D526, D527) and peripheral devices.
TMDS receiver IC receives TMDS signal via ESD
protection diode. And it convert HDMI signal to digital
RGB signal. And it sends to scaler.
5. RS-232C INPUT OUTPUT CIRCUIT
This section is composed of RS-232C
IC(ICL3232C_IC503), and peripheral devices.
Computer and scaler(micom) was connected by RS-
232C IC.
6. VIDEO SIGNAL PROCESSOR (FORMAT
CONVERTER)
This section is composed of FLI8662(IC101) and
peripheral devices.
FLI8662(SCALER_IC101) has in built MICOM in IC.
(1) This IC includes A/D Converter, Pre-Amp, PLL
Circuit.
(2) This IC includes video decoder and De-interlacer.
(3) This IC includes LVDS Transmitter.
LVDS Transmitter is encoding the output Signal.
Also, FLI8662 have Format Converter (Scaling)
function.
This IC converts Various size of Digital signal to LCD
Module's resolution (WXGA).
7. AUDIO DECODER
This section is composed of MSP4440K(IC804),
NTP2000(IC805) and peripheral devices.
MSP4440K is processing audio signal(AV,
Component, PC Audio and IIS).
Digital audio processor IC receives IIS signal from
MSP4440K, and converts IIS to PWM signal.
This IC's output signal is sent to Audio Amplifier
IC(TAS5122_IC802).
8. AUDIO AMPLIFIER
This section is composed of TAS5122(IC802) and
peripheral devices.
Audio Amplifier's function is amplification of sound
signal received from Audio Decoder.
Input Audio signal is amplified according to the DC
Volume control curve.