Vivitek LCD-TV User Manual download pdf (Page 3)

T470 User’s manual V027B, © JED Microprocessors Pty Ltd 2015 Page 3

RS232 connections to BenQ projectors with D9, female on projector

These all use a D-sub 9-pin connector, female on projector, male on cable. Communications runs at 19200 8N1.

Function/Direction

T470 or T452 serial

Connection

Projector Connector

(Male on cable)

Ground

pin D

sub pin 5

Data from T470 to

projector

pin D

sub pin 2 (RXD)

Reply data from projector to T470

pin D

sub pin 3 (TXD)

After installation wiring of any projector to a T470, 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. A useful check that

you have actually connected to a valid RS232 input on the projector is to unplug the cable from the

controller and measure resistance down the cable to ground using a multimeter on the “K-Ohms” setting.

This should be 4k to 8 K-Ohms.

BenQ No CR: Code 1200h

BenQ SH960 (These differ from usual BenQ codes, in that there is no <CR> either side of command string.)

Source

Label/Connector

Code sent

Comments

Computer 1: DSUB RGB

'*sour=RGB#'

Computer 2: DSUB RGB 2

'*sour=RGB2#'

Component

'*sour=ypbr#'

Composite

'*sour=vid#'

HDMI

'*sour=hdmi#'

Video

'*sour=svid#'

• BlankOn/BlankOff, SoundMuteOn/SoundMuteOff and Freeze/Unfreeze are all supported if appropriate

buttons are allocated. Combined Blank/SoundMute is also supported with a keyboard option. These are

absolute functions and a LED indicates the current state;

• AspectRatio4:3 and AspectRatio16:9 are supported if an AspectRatio key is allocated. This is a rolling function

with no LED indication of state;

• Audio Volume range is limited and incremental. Some BenQ projectors do not have audio out, and audio

inputs are often limited;

• Off LED Comms-OK (one blink) and NoComms (three blinks) is supported;

D-sub 9 male

solder side

4 25 1

9 8 7 6

1 2 3 4 5 6 7 8 ... 60 61

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Vivitek LCD-TV User Manual Page 3

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