Tektronix TLA 704, Руководство по обслуживанию

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Troubleshooting
TLA 704 Color Portable Mainframe Service Manual
6–53
Update the BIOS Version
On rare occasions it may be necessary to update the controller BIOS version. In
most cases this is only necessary to activate enhancements to the product. To
update the BIOS, you will need the latest version of BIOS available on floppy
disk (Tektronix part number 063-2895-xx). Before updating the BIOS verify that
the BIOS version on the instrument is an older version than that printed on the
floppy disk label.
The BIOS version is briefly displayed on boot up of the instrument. To verify the
BIOS version number, power the instrument on and watch the upper left hand
section of the screen. A message will be displayed as below:
Copyright 1996 By RadiSys Corporation. Version 1.xx.xx.
RadiSys boot block version 1.xx.xx
Before continuing, verify that the BIOS version that is displayed is an older
version than the version you are installing. The version number is listed on the
software floppy diskette.
Some controllers were shipped with the BIOS jumper already in place. To verify
that you need to install a BIOS jumper, go to step 1, on page 6–54, and follow the
instructions and attempt to update the BIOS.
If the BIOS jumper is not in place, you will get an error message stating that the
BIOS could not be updated. If this happens, disregard the message and turn the
instrument off with the power switch.
To install the BIOS jumper, proceed with the instructions under Install the BIOS
Jumper, and follow the disassembly instructions.
To install the BIOS jumper, perform the following procedures to disassemble the
instrument to access the jumper location:
1. Remove the front cover and trim ring; follow the procedure beginning on
page 6–9.
2. Remove the bottom cover; follow the procedure beginning on page 6–14.
3. Remove the left side cover; follow the procedure beginning on page 6–16.
4. Remove the top cover; follow the procedures beginning on page 6–15.
5. Remove the eight screws securing the EMI shield to the chassis (see
Figure 6–13 on page 6–29), and then lift off the EMI shield.
6. Place a shorting jumper at jumper position H2, pins one and three. Refer to
Figure 6–19 for the jumper placement.
Verify the BIOS Version
Verify the BIOS Jumper is
in Place
Install the BIOS Jumper