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General Troubleshooting & Repair Teledyne API T703 Calibrator Operation Manual
216
11.8.2. DISK-ON-MODULE REPLACEMENT PROCEDURE
NOTE
Printed circuit assemblies (PCAs) are sensitive to electro-static discharges too small to be felt by the
human nervous system. Failure to use ESD protection when working with electronic assemblies will
void the instrument warranty.
See Section 12 for more information on preventing ESD damage.
Replacing the Disk-on-Module (DOM) will cause loss of all DAS data; it also may cause loss of some
instrument configuration parameters unless the replacement DOM carries the exact same firmware version.
Whenever changing the version of installed software, the memory must be reset. Failure to ensure that
memory is reset can cause the analyzer to malfunction, and invalidate measurements.
After the memory is reset, the A/D converter must be re-calibrated, and all information collected in Step 1
below must be re-entered before the instrument will function correctly. Also, zero and span calibration should
be performed.
1. Document all analyzer parameters that may have been changed, such as range, auto-cal, analog
output, serial port and other settings before replacing the DOM
2. Turn off power to the instrument, fold down the rear panel by loosening the mounting screws.
3. When looking at the electronic circuits from the back of the analyzer, locate the Disk-on-Module in the
right most socket of the CPU board.
4. The DOM should carry a label with firmware revision, date and initials of the programmer.
5. Remove the nylon fastener that mounts the DOM over the CPU board, and lift the DOM off the CPU. Do
not bend the connector pins.
6. Install the new Disk-on-Module, making sure the notch at the end of the chip matches the notch in the
socket.
7. It may be necessary to straighten the pins somewhat to fit them into the socket. Press the DOM all the
way in and reinsert the offset clip.
8. Close the rear panel and turn on power to the machine.
9. If the replacement DOM carries a firmware revision, re-enter all of the setup information.
11.9. TECHNICAL ASSISTANCE
If this manual and its trouble-shooting / repair sections do not solve your problems, technical assistance may be
obtained from
TELEDYNE-API, CUSTOMER SERVICE,
9480 CARROLL PARK DRIVE
SAN DIEGO, CALIFORNIA 92121-5201
USA
Toll-free Phone: 800-324-5190
Phone: 858-657-9800
Fax: 858-657-9816
Email: api-sales@teledyne.com
Website: http://www.teledyne-api.com/
Before you contact customer service, fill out the problem report form in Appendix C, which is also available
online for el
e
ctronic submission at http://www.teledyne-api.com/forms/.
07223B DCN6378