Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 286)

Troubleshooting and ServiceTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 286
12.6.4. DISK-ON-MODULE REPLACEMENT
ATTENTION COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Servicing of circuit components requires electrostatic discharge
protection, i.e. ESD grounding straps, mats and containers. Failure to use
ESD protection when working with electronic assemblies will void the
instrument warranty. Refer to Section 13 for more information on
preventing ESD damage.
Replacing the Disk-on-Module (DOM) will cause loss of all DAS data; it may also
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 standoff clip 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 chip all the way in.
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.