B-TEK Scales T405S, Service Manual

Page: 33 / 156

T405S Indicator Service Manual 33
5.1 Diag menu
5.1.3 Display
5.1.4 Buttons
5.1.5 Ports
PortS Use this to do a loopback test for serial port 1 or 2 or to perform a write/
read test on the USB port.
SEriAL1 or 2 When you pick a serial port to test, tESting is briefly displayed and
then PASS or FAiL , depending on if the send and receive lines are
jumpered (pass) or not (fail). Add a jumper or wire between the
transmit output and receive input. On an external 9 pin connector the
transmit line is pin 2 and the receive line is pin 3.
uSb Use this to test a connected USB flash drive.
oPEn is briefly displayed, then WritE is briefly displayed, then rEAd is
briefly displayed, then PASS or FAiL , depending on if the USB device
is working correctly or not.
If no USB device is plugged in when you begin the test, oPEn is briefly
displayed, then no uSb is briefly displayed, then uSb .
Display
Continuous
display test
( ZERO exits
the test)
diSPLAY Use to test the segments of the display. Each digit
area lights up in progression and continues until you
press
ZERO .
Buttons
Test button
function
( ZERO exits
the test)
buttonS Use to test the keys. When you begin the test
tESting is briefly displayed followed by dashes.
Press any key to test if it is functioning and its name
or value will be displayed.
Press ZERO to stop the test.
Ports
USB Serial1 Serial2
Loopback
test
Loopback
test
Performs
write/read
test
It is recommended that you insert the jumper (a paper clip works) into the external
cable connector to validate the wiring and not just the internal ports. See System
block diagram
on page 143 for I/O configuration of the serial ports TB3.