GE HE500TIU103, IC300TIU201, IC300TIU101, HE500TIU100, HE500TIU050 manual Getting Started, Self-Test

CH. 7: GETTING STARTED	06 Apr 2000	PAGE 35
		GFK-1819

CHAPTER 7: GETTING STARTED

7.1Self-Test

Power up the unit with the UP and ENTER keys pressed at the same time. The unit enters a self-test mode. The self-test consists of the following four checks:

7.1.1Contrast Band

This test allows the user to set the lower and upper limits of contrast. Adjust the lower limit using the UP or DOWN key and press Enter when done. Do the same for the upper limit.

WARNING: - Changes to the lower or upper limits may allow the user to set the contrast to a setting where the display may appear blank. It is recommended that the factory setting are used (Min 8A, Max FE).

7.1.2Display Test

The display test continuously blinks all pixels on (black) to off. Look for any pixels stuck on or off. Exit this test by pressing and holding any key for approximately two seconds.

7.1.3Keyboard Test

As each key is pressed, an indication *** appears above that key. In the case of units with a numeric keypad, press the key and a message appears indicating the key press. Check for keys indicating multiple presses or not reporting presses. Exit this test by pressing and holding any key for approximately two seconds.

7.1.4RAM Test

Test either segment 0000 or segment 1000 (on the TIU100/110) of the RAM. The segment 1000 test performs a base 3 repeating test. This test detects shorted address lines and damaged memory bits. The segment 0000 test performs a Read-Modify-Write test on each byte of RAM, detecting damaged memory bits. Exit this test by selecting DONE.

7.1.5Serial Loop-back Tests

Tests the PC port and the Serial Port in each of it’s three modes for serial loop-back. Pre-made plugs are required to link the pins of a particular port. This takes the following form:

Table 7.1 Loop-back Test Plugs

Port Tested	Product	Type of Connector	Pins to Short
PC (J2)	TIU100/110	Pin male D link connector	pin 2 to pin 3
RS-232 (J3)	TIU100/110	13-pin phoenix connection	pin 6 to pin 8
RS-422/485 (J3)	TIU100/110	13-pin phoenix connection	pin 2 to pin 4 and pin 3
			to pin 5.
Current Loop	TIU100/110	13-pin phoenix connection	pin 1 to 9, pin 10 to 11
			and pin 12 to 7
PC	TIU050/101/102/1	Pin male D link connector	pin 2 to pin 3
	03/112/113/20X
RS-232	TIU050/101/102/1	8-pin phoenix connection	Pin 5 to pin 7
	03/112/113/20X
RS-422/485	TIU050/101/102/1	8-pin phoenix connection	Pin 1 to pin 3, Pin 2 to
	03/112/113/20X		pin 4

NOTE: current loop in not installed on standard models, as such a standard model will fail the current loop-back test. Current Loop is not an option on the TIU050/20X.

After starting the test, the OK counter begins to count up. Exit this test by selecting DONE.