Command Table RS-232
Remote Commands Over RS232c Port
The HP HDTVs include a male DB-9 RS-232 connector with the following pin out.
1, 4, 6, 7, 8, 9
Set the RS-232c communications settings on the PC to match the TV's communication conditions. The TV's communications
settings are as follows:
The 7-byte command format uses a 3-byte command field and a 4-byte parameter field as follows:
COMMAND: 3 bytes
PARAMETER: 4 byte
CR (Carriage Return) at the end of string
"OK" + CR: success
"ERR" + CR: failure
The command is terminated by a Carriage Return (CR). Don't send multiple commands at the same time. Wait until you receive
an OK response before you send the next command. Make sure parameter values are entered left-aligned and that you fill with
blanks the remaining values. In the following RS-232 Command Table, "_" indicates "space", "*" indicates a valid value in the
range specified under the "Control Contents" columns, and "x" indicates any numerical value.
Note: The TV is expecting to receive the entire 8-byte string (3-byte command + 4-byte command + CR) at once. If you use a
tool that sends a single character at a time, like a Hyper terminal, the TV will automatically return an error (ERR) signal.
Example: To turn off the TV. The command is P W R 0 _ _ _ CR, which translates in Hex to the 8-byte command: 50 57 52 30
20 20 20 OD.
HP High-Definition LCD TV Service Manual