Tektronix HDVG1, Service Manual

Page: 84 / 106

Troubleshooting Procedures
5- 10
HDVG1 HDTV Digital Video Generator Service Manual
General Troubleshooting
This section contains general troubleshooting instructions and procedures to use
when you begin to troubleshoot suspected faults with the HDVG1 Generator
module.
Before you begin any troubleshooting procedures, perform Signal Backup and
Logo Backup on page 2--8. After the problem is solved, restore instrument
signals from the backup disks.
CAUTION. To prevent data loss, back up the instrument before you begin any
troubleshooting procedures.
The TG2000 Platform mainframe displays module diagnostic information
during instrument power up. Any error messages are written to an internal file
called the console ring file. Tektronix technicians can use the information in the
console ring file to help troubleshoot a malfunctioning module.
NOTE
. Write the console ring file to disk before performing troubleshooting to
prevent the troubleshooting routines from overwriting the console ring file.
Write the file as follows:
1. Load the Troubleshooting disk (supplied with the
TG2000 Signal Generation
Platform Service Manual ) into the floppy drive. Press the front-panel
Sequences button.
2. Touch File Utilities , and then touch Add Sequences from Disk .
3. Select the consbak.seq sequence file and then touch Start Load .
4. Touch OK, Quit , and then Quit again.
5.
Touch
Sequences
and then select the
consbak.seq
file to run (use the
Select
key).
6. Touch Run . Insert a blank disk when prompted, and touch Quit . Label this
disk #1.
7.
Turn the instrument off and then back on from the front panel. Wait until the
instrument has completed its power up process.
8.
Write the console ring file to disk again, using a different disk. Label this
disk #2.
Signal Backup
Saving the Console Ring
File to Disk