User`s manual

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

RS232 connections to Toshiba projectors (all except TLP-710/711)

The majority all use a mini-DIN 8 male connector wired, as follows: (Comms is at 9600 baud, 8 bits, no parity, 1 stop)

Function/Direction T460 “projector”

Connection

Toshiba Control Port

Connector

Ground Ground mini-DIN 8 pin 4

Data from T460 to projector Tx mini-DIN 8 pin 1 (RXD)

Reply data from projector to T460 Rx mini-DIN 8 pin 7 (TXD)

Plus 9 volt CTS/DTR to projector CTS mini-DIN 8 pin 2 (opt.)

mini-DIN 8

solder side view

43 5

1 2

6 7 8

NOTE: We have noticed that a number of Toshiba projectors have a VERY small hole in the plastic case surrounding the mini-

DIN 8 RS232 “Control” port connector, such that commonly available plugs, while they appear to plug in OK, and are held

firm, in fact don’t actually connect the pins, just the outer shell. If you have comms problems, this may be the cause.

Multimeter checks of RS232 voltage levels will show no connections. We fixed it by removing the outer plastic shell sleeve,

and just using the plug internals, with the two split metal sections and the two split plastic sections, and then heat-shrink a

15mm sleeve of 12mm tubing around the outer 15mm length only of the plug, leaving the far end of the plug free of plastic.

Some pre-assembled (moulded) connectors may be OK, where you can cut the other end off and re-terminate, but the self-

assembly ones could be nasty!

RS232 connections to Toshiba projectors TLP-710/711

These use a D-sub 9 pin connector (documentation does not show male/female):

Function/Direction T460 “projector” Connection Toshiba Control Port Connector

Ground Ground 9-pin D-sub pin 5

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

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

Plus 9 volt CTS/DTR to projector CTS 9-pin D-sub pin 7 (seems optional)

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.