Mitsubishi Electric LT-2220 Service Manual page 26

1-2. Signal processor circuit
(N)IC400 : Signal processor IC ( M66473FP : Mitsubishi)
This IC has the functions below.
Scaling for PC
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PIP/POP control for PC and AV combination
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Picture enhancement
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Auto setup for PC
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Colorsync function
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Frequency measurement / distinction
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Sync separation for component CS
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Color space conversion ( YPbPr à RGB )
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Gamma correction
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This IC is controlled by register control of IC 400 via 5-lines serial communication.
This IC's output is sent to IC4A0.
(The output format is RGB and WXGA, and Vertical frequency is 60Hz.)
(O)IC4A0 : OSD mixing IC ( M66617FP : Mitsubishi)
This IC combines the picture signal outputted from IC400, the OSD signal outputted from the
MCU and the signal detected by CCD.
V-CHIP function is also controlled by this IC.
This IC is controlled by register control of IC 4A0 via serial communication.
The IC's output is sent to IC4A1.
1-3. Output signal circuit
(P)IC4A1 : LVDS transmitter IC ( THC63LVDM83R : Thine)
This IC converts 28bits of TTL/CMOS data into LVDS data stream.
In 28 bits, 24-bits digital video signal, horizontal sync signal, vertical sync signal, an enable
signal and a clock signal for the LCD panel are included.
A phase-locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link.
This IC's output is sent to the LCD panel.
MODELS: LT-2220 / LT-2240 / LT-3020 / LT-3040 / LT-3050