Mitsubishi V19-V21, Техническое руководство

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6-2
cally for the TV, they are processed by the DM µPC
and sent back to the TV µPC.
If the signals are for System 5 compatible compo-
nents, they are directed to the System 5 IR Output
Jacks. System 5 enables Home Theater control us-
ing only the TV later of a Mitsubishi Remote.
Input Command Circuitry
Figure 6-1 illustrates the Input Command circuitry.
Input commands can originate from the front panel
buttons, or the Remote Control. As in previous
models, the front panel buttons are connected in a
two column resistive ladder array.
Each column connects to a Key Scan input on the
TV µPC, either KSC0 or KSC1. When a button is
pressed the analog voltage at that’s columns input
changes, denoting the command. The TV µPC con-
verts the command to a serial data format and forwards
it to the DM µPC over the DM-TXD line.
The DM µPC generates the appropriate control sig-
nals to perform the command, and sends them to the
TV µPC over the DM-RXD line.
Remote commands from a Mitsubishi remote are
amplified and directed to the RMC input of the TV
µPC. The TV µPC rejects all signals not in a Mit-
subishi format. After filtering, they are reformatted
and directed to the DM µPC over the IPC Bus.
If the commands are for the TV, the appropriate sig-
nals are returned to the TV µPC over the DM-RXD
line If they are System 5 commands, they are pro-
cessed and directed to the System 5 IR Output Jacks.
Commands from other manufacturer Remotes are
amplified in the Wide Band Preamplifier and, through
IC7C30, are directed to the IR Output Jacks.