Mitsubishi Electric LT-3280 Service Manual page 28

1-2. Video input circuit of Monitor Link
In Monitor Link A/V Input, it is inputted into IC400 of the signal processing IC via Following IC.
TM
(H)IC500 : HDMI-Receiver IC ((SII9993CTG100 : SiliconImage)
This IC uses to receive and correspond the differential signal. This IC corresponds not only HDMI
input but also DVI input(TMDS interface) . Supported timing of this input is 480P/1080i/720P.
The output format of this IC is YCbCr4:4:4, not RGB.
(I) IC501 : 2K-bit EEPROM (24LC22ATI : Microchip)
This is the IC for E-EDID of Monitor Link
This IC has important information about Monitor Link
Identification code, in addition to product code, serial number, video specification, proposed timing,
color information.
1-3. Signal processor circuit
(J)IC400 : Signal processor IC ( gm1601-LF-CF : Genesis)
By this IC, it has the function below.
Scaling for all inputs.
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PIP/POP/PAP control for all inputs
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Auto setup for PC
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Frequency measurement / distinction for all inputs
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Color space conversion ( YPbPr
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Motion Adaptive De-Interlacer.(480i/1080i)
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Color / tint control the input signal except PC input.
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3 dimension Noise reduction.
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Adaptive Film Mode (24Hz
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Gamma correction
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Contrast and brightness adjustment for COMPONENT
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OSD mixing
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This IC is controlled by register control of IC 400 via 5-lines serial communication.
The output format of this IC is LVDS data stream (differential signals).
In 28 bits, 24-bits digital video signal and horizontal sync signal, vertical sync signal, and an enable
signal and a clock signal for LCD panel are pointed out.
A phase-locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link.
And this output is sent to LCD panel through CNF1.
(K)IC405 : 4M bit Flash Memory(PM39LV040-70JCE : PMC)
This IC is installed the firmware of IC400(gm1601), helps that IC400(gm1601) serves as another
MPU. (This model operates by 2 MPU)
(L)IC403 : 128M-bit DDR SDRAM
( HY5DU283222AFP-36, HY5DU283222AF-36 : HYNIX• ANT5DS4M32EG-5 32809BPT : NANYA)
This IC is used as external frame buffer of IC400(gm1601), provides the storage required for the
frame rate conversion process and integrated OSD.
MODELS: LT-3280D/LT-3780D
A/V Input
TM
A/V Input.
TM
A/V Input such as audio, speaker,
TM
RGB )
30Hz)
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