44
SERIAL CRTL (RS232C (M3)) terminal connection
PC Control of the TV
Communication parameters
The TV can be controlled by a personal computer when
connected through an RS232C cable (not supplied).
The computer will require software which allows sending
and receiving of control data through its SERIAL port.
Please see required parameters and commands below.
Signal level
RS-232C compliant
Synchronization method
Asynchronous
Baud rate
9600 bps
Parity
None
Character length
8 bits
Stop bit
1 bit
Flow control
-
Pin layout and signal name for SERIAL CTRL terminal
GND
Tx
Rx
TV set
GND
Tx_TV (Transmission of TV side)
Rx_TV (Reception of TV side)
■
Basic format for control data
The transmission of control data from the external device starts with a STX signal, followed by the command, the parameters,
and lastly an ETX signal in that order. If there are no parameters, then the parameter signal does not need to be sent.
STX
C1
C2
C3
:
P1
P2
P3
P4
P5
ETX
Start (02 h): 1 byte
Command: 3 byte (fixed) Colon: 1 byte
Parameter: 5 bytes maximum (Length depends on Command)
End (03 h): 1 byte
Colon and Parameter are only sent when necessary
Please see p. 45 regarding Commands and Parameters.
Note
With standby mode, this TV responds to “PON” and “QPW” commands only.
Wait for the response of the first command to come from this unit before sending the next command.
If multiple commands are transmitted, be sure to keep intervals of 250msec. Send the command again when the call back
command is unusual.
If an incorrect command is sent by mistake, this TV will send an “ER401” or “ER402” command back to the computer.
This TV does not respond for 15 seconds when “PON” or “POF” commands are transmitted.
Send “EXT” commands before sending “IMS:**” commands.
DATA/MTI (RJ11) terminal connection
A standard 6 pin RJ-11C connector is used to provide a connection between the MTI equipment and the TV set. Both the MTI terminal and
TV are equipped with FCC-66 style (RJ-11C) jacks. Each of these jacks shall accept a 6 contact plug Molex P/N 90075-0007 or equivalent.
External TA
Multiple Television Interface (MTI)
1 2 3 4 5 6
TV Connector Pin
Signal
MTI terminal
Connector Pin
Signal source
1
Clock
6
TV
2
MTI Data
5
MTI
3
Open
4
N/C
4
TV Data
3
TV
5
Ground
2
Common
6
IR Data
1
TV
Pin layout for RJ-11C terminal Interface signals on the interface
Internal TA
Compatible with LodgeNet game controller (DATA)
(LRU7 series do not have Internal TA.)
Technical Information
(Continued)
