Agilent Technologies 2948, 2712A manual Firmware Updates A2U12 and A2U13, Different function

Model 89048 Instrument Changes

7-6. FIRMWARE UPDATES (A2U12 AND A2U13)

The -ware is changed whenever anomalies are found inthe instrument’s operationwhich can be corrected by altering the Controller’sprogram. Firmware is also changed toadd new features, which may only be changes in the program, or which may also result from instrument hardware changes.

Replacing the ROMs

Use the following procedure to install new ROMs:

The ROMs (MU12 and MU131 are static sensitive devices. Takeprecau- tions against electrostatic discharge @SD) before handling these compo-

nents.

NOTE

In instruments with serial prefix 2942A and below, the finware is stored in two ROMs (MU12 andA2U13). In instruments with serialprefix2948A and above, the firmware isstored only in one ROM (MU12). (MU13serves

adifferent function)

1.Unplug the power cord.

2.Remove the top cover. The cover may be tightly secured in the groove of the bottom cover. If the top cover does not pull off easily after backing out the screw on the rear edge, back out the screw on the rear edge of the bottom cover also.

3.For instruments with serialprefix 29428 and below, inlocate U12 and U13 onthe A2 assembly (front horizontal board). For instruments with serial prefix 2948A and above, locate only U12. They are in sockets. The reference designator is labeled beside the IC.

4.Pry out the old ROM or ROW with a blade-type screwdriver.

5.Plug in the new ROM or ROMs in the correct sockets and with the correct pin orientation.

6.Check the operation of the instrument.

Serial Prefix 2740A and below:

The recommended replacement for MU12 is HP Part 08904-87010. The recommendedreplacement for MU13 is HP Part08904-87008.Ifeither MU12 or M U 1 3 fails, replace the other part also if its part number differs.

Serial Prefix 2742A and above:

The recommended replacement for MU12 is HP Part 08904-87011.The recommended replacement for MU13 is HP Part 08904-87009.

rev.01JUL91 Firmware UpdatesBardware Modifications 7-9