User`s manual

T460/461/T462 Manual 26th Sept 2008. V2.79 Part B © JED Microprocessors Pty Ltd

RS232 connections to NEC projectors with D9

These use a 9-pin-D9 male on the projector, female on cable.

Function/Direction T460 “projector” Connection “Serial” Port Connector

Ground Ground 9-pin D-sub pin 5

Data from T460 to projector Tx 9-pin D-sub pin 2 (RXD)

Reply data from projector to T460 Rx 9-pin D-sub pin 3 (TXD)

Plus 9 volt CTS/DTR to projector “RTS” 9-pin D-sub pin 8(CTS IN)

After installation wiring of any projector to a T460, use a multimeter to check voltages of –9 on BOTH TX and RX pins in any

installation, as described in the troubleshooting part of this manual. Note: On the LT260 (and maybe the 240 and 220), and

the MT1060/65, the measured voltages from the projector were considerably lower, measuring a standing –4 volts, and

signals going to +4 peak, which is OK for the RS232 spec, but lower than usual. (The T460 puts out +/– 9 volt signals.)

Optoma: Group 1: DS309, DX609, EP752, EP761, EP763, EP721, EP723, EP727, EP728,

Optoma: Group 2: EP776, EP782

The following table shows the mapping of T460 channel number, the string sent, and the input associated with that channel in

the manual, and how it is identified on the on-screen menu. There are two similar groups of codes. * Some only.

T460 Channel TX code Group 1 Input name TX code Group 2 Input name

1 ~0039 5<CR> VGA1 ~0012 5<CR> VGA1

2 ~0039 6<CR> VGA2 ~0012 6<CR> VGA2

3 ~0039 10<CR> Composite Video ~0012 10<CR> Composite Video

4 ~0039 9<CR> S-Video ~0012 9<CR> S-Video

5 ~0012 8<CR> VGA 1 Component * ~0012 8<CR> VGA 1 Component

6 ~0012 2<CR> DVI-D* ~0012 13<CR> VGA 2 Component

7 ~0012 3<CR> DVI-A* ~0012 1<CR> HDMI

8 ~0012 7<CR> VGA 1 SCART* ~0012 11<CR> Wireless

Don’t forget to set all unused T460 channels to “Skip” to jump over blank/unused inputs.

The “Source Lock” option in the “Options” menu MUST be turned ON (to stop the projector searching for other

channels when an input is dropped.)

Aspect ratio control is included. Use source names: “Set reg 4:3” and “Set reg 16:9”.

There are audio inputs for all signal inputs, and the RS232 control system controls the audio level to the audio output jack.

MuteOn/Mute Off and Freeze On/Off and Mute On/Off keyboards are supported, and work normally.