MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
83
January 2000
Problem: Error message or check code is displayed.
When a MT is turned on, it performs a self-diagnostic check and displays an error code if it
encounters a problem. Some error codes indicate problems that can be fixed by reprogramming
the MT or ensuring that the connections to the TU are good. Some check codes indicate a
hardware failure that may require component replacement.
Check Code or Error Message
What to do
1. Shutdown/Push Power or Sat Shutdown
Indicates receipt of a “cease transmit”
message from the satellite network. This
message is usually seen during failed
commissioning attempts. Coordinate with the
service provider and try again.
2. High TMP
Turn the MT off and let it cool for 30
minutes. If the message persists, the AU may
be defective.
3. Check 11
This indicates a TU failure.
4. Check 13
This indicates a TU failure.
5. Check 14
This indicates an unusual RF power status and
may mean that there is a problem with the
AU.
6. Check 20
This indicates an unusual transmission burst
that may be the result of an AU failure.
7. Check 21
This indicates a TU failure.
8. Check 23
This indicates a TU failure.
9. Check 24
This indicates a TU failure.
10.Check 30
Verify that the SASK is correct.
11. Check 40
The BSU may be defective.
12. Check 42
The BSU may be defective.
13. Check 43
Check the connection to or replace the BSU.
14. Check 44
The BSU may be defective.
Problem: Audio quality is poor or volume is low.
Most user complaints about audio volume can be resolved by reviewing operating instructions
and performing a physical inspection of the system.
What to Check
What to Do
1. Is the volume set too high or low?
Adjust the volume level.
2. Is the received audio intermittent?
Make sure the MT has a clear transmission
path.
3. Is the handset cradle or junction box
damaged?
Replace damaged part or component.
