User manual

Chapter 2. Installation
61202156L1-1 TDU 120e User Manual 2-7
POWER UP TESTING
When shipped from the factory, the TDU 120e is set to factory
default conditions. At the first application of power, the unit
automatically executes a memory self-test. A full self-test can
be run from the terminal. A passcode and unit ID may be set
using the UTIL menu.
Self-Test
The full self-test procedure (invoked from the terminal or T-
Watch PRO) consists of the following tests:
Board Level Tests
The TDU 120e contains an on-board processor which exe-
cutes a series of tests checking the circuitry on the board.
RAM and EPROM Tests
Verify on-board circuitry
Unit Level Tests
Front panel LED verification.
Board-to-Board Interface Test
A test pattern is sent from the controller through a loopback
on all other boards and checked on the controller.
This verifies the data path, clocks, and control signals for the
entire chassis.
When... Then...
Initiating a self-test The terminal displays System Self-test Now
Testing and Memory Test Now Testing. The
test leds are illuminated.
The self-test is completed All LEDs go back to their normal state. The ter-
minal momentarily displays System Self-test
Tests passed.
A failure is detected A list of failures is displayed on the terminal.