Teledyne 9110T Service Procedures, DISK-ON-MODULE Replacement Procedure, Are not listed here

Model 9110T NOx Analyzer Troubleshooting & Service

12.8. SERVICE PROCEDURES

This section contains some procedures that may need to be performed when a major component of the analyzer requires repair or replacement.

Note	Maintenance procedures (e.g., replacement of regularly changed
	expendables) are discussed in Section 11 (Instrument Maintenance) and
	are not listed here).
	Also, there may be more detailed service notes for some of the below
	procedures. Contact Teledyne Customer Service Department.

WARNING – ELECTRICAL SHOCK HAZARD

Unless the procedure being performed requires the instrument be operating, turn it off and disconnect power before opening the analyzer and removing, adjusting or repairing any of its components or subsystems.

CAUTION – QUALIFIED TECHNICIAN

The operations outlined in this chapter are to be performed by qualified

maintenance personnel only.

12.8.1. DISK-ON-MODULE REPLACEMENT PROCEDURE

Note	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 14 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.While 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.

Teledyne Analytical Instruments 308