MITSUBISHI ELECTRONICS AMERICA, INC.
ST200 Series Technical Support Manual
79
January 2000
First Line Problem Analysis Checklist
Procedure
Action
A. Characterize the Problem
Attributes
Rule out items B through E below;
refer to checklists.
Power On/Off OK?
Check codes displayed?
Call initiation OK?
Call receiving OK?
Call quality OK? Receive? Transmit?
Conditions
Location, line of sight, blockage, foliage?
Weather conditions?
Are problems encountered under different
conditions?
What is the specific MT configuration?
Timeframe
When was the problem encountered?
How long did the problem persist?
Is the problem constant or intermittent?
B. Rule out operator error
User’s experience level?
Has user read and understood the manual?
Trace steps leading to problem.
Has the user made other errors?
Educate the user.
C. Rule out System-Related Problems
Is the “No SVC” indication displayed all or
much of the time?
Fast busy signal?
Can’t make or receive calls?
Are calls being dropped?
Have there been similar complaints from
others during this time period?
Call the Service Provider to confirm
the existence of a system-related
problem.
D. Check for obvious hardware problems
Are any cables pinched, pulled or cut?
Are all connectors tight?
Are there signs of any physical damage?
Inspect MT components.
E. Has the MT been exposed to moisture?
Was the MT exposed to rain or snow?
Did the user spill a beverage on the handset?
Inspect MT components.