Tektronix 070-9778-03, Service Manual, Page: 36 / 119

Operating Information
2–2
TLA 711 Color Benchtop Controller Service Manual
The benchtop controller has three LED indicators located on the front panel.
Figure 2–1 shows the front panel with the location of the LED indicators and
front panel connectors.
RUN Indicator
SYSTEM FAIL Indicator
TEST Indicator
Keyboard
SVGA OUT port
COM port
LPT printer port
Mouse
Floppy drive
SYSTEM TRIG IN
PCMCIA
PC Cards (2)
SYSTEM TRIG OUT
EXTERNAL SIG IN
EXTERNAL SIG OUT
Figure 2–1: Front view of the benchtop controller
RUN Indicator.
A green LED that lights when the hard disk drive is accessing
data.
SYSTEM FAIL Indicator.
A red LED lights when a SYSFAIL condition exists on
the communications bus.
TEST Indicator.
A yellow indicator lights when the benchtop controller is
executing a Power On Self Test (POST) diagnostic test sequence.
LED Indicators