Teledyne ADFM Analog Output Module, Technical Manual, Page: 61 / 156

ADFM Troubleshooting
a. Verify that the internal or external power sources are properly con-
nected to the ADFM, and sufficient to supply it.
b. Verify that the computer’s serial port is functioning normally. With
Windows 95, go to Start , Settings , Control Panel . Double click
System , go to the Device Manager tab and select Ports to deter-
mine if the computer’s serial port is properly operating. Verify line
continuity on the RS-232 Serial Communications Cable.
c. Using BBTALK , located in the C:\WinADFM root directory, send a
break to the ADFM using the <end> key. Make sure that the com-
puter port is set up correctly for port setting, baud rate, parity, num-
ber of data-bits and number of stop-bits by pressing the F5 key while
in
BBTALK . The correct parameters are the COM port you are using
(typically COM1), 9600, none, 8, 1. Sending a break will establish
serial communications between the ADFM and the computer. The
wake-up message, and a series of built-in test results should be dis-
played at the Electronics Unit’s LCD (please refer to the self-test de-
scription in
Chapter 5 ).
d. If remote communications can still not be established, assert a man-
ual reset at the ADFM Electronics Unit by turning the keyed switch
labeled “RESET” to the “1” position; release the switch. This should
start the built-in test. The wake-up message, and a series of built-in
test results should be displayed at the Electronics Unit’s LCD (please
refer to the self-test description in
Chapter 5 ).
If the above procedure is not successful, one possible answer is that the
Electronics Unit’s motherboard is faulty, and may have to be exchanged. If
all tests are successful (i.e., the computer screen produces normal, legible
results), however, at no time does the LCD display showed any information,
or the display was scrambled, the ADFM’s LCD display or the front panel
interface may be faulty, and may require replacement. It may, however, be
the ADFM power supply that is at fault.
6-5.2 Power
If the built-in test can not be executed locally or remotely, nor any other
type of communication is possible with the ADFM, follow the procedure
below to assist you to isolate the problem.
a. If you tried to use internal batteries to power the ADFM you may al-
ternatively try mains power or DC power if possible. If you are suc-
cessful, a faulty battery switch, or its wiring most likely causes the
problem. Check also the internal batteries’ wiring harness for good
connection at the battery terminals, and the motherboard battery
connector.
ADFM Technical Manual (January 2000) page 6-7