Performance Tests
CSA 803C Service Manual 4Ć15
ăStep 5:ăSet the rear panel PRINCIPALPOWER SWITCH to ON and then
set the CSA 803C's front panel ON/STANDBYswitch to ON.
When the CSA 803C is first installed, the rear panel PRINCIPALPOWER
SWITCHshould be set to and left in the ON position. From then on, use
the front panel ON/STANDBYswitch to perform all subsequent power
switching.
ăStep 6:ăMonitorthe following diagnostic run functions, and note the
range of possible results.
Diagnostics
Each time the front panel ON/STANDBYswitch is set to ON, the CSA 803C
performs Kerneldiagnostics on its microprocessor subsystems, followed by
SelfĆTestdiagnostics on most of its major circuits. Failures from either of
these two sets of diagnostics may cause the CSA 803C to enter the ExĆ
tended Diagnostics menu as described in this procedure.
When Kerneldiagnostics begin, the Diagnostics in Progress and Comm
Testin Progress messages are displayed on the screen. If the CSA 803C is
being poweredĆon from a cold condition, then the diagnostics may be
completed before the CRT is warmed up and able to display these mesĆ
sages. Diagnostic routines are then performed in parallel on each of the
CSA 803C's microprocessor subsystems (Display,Executive, Time Base,
and Mainframe Acquisition). Followingsuccessful execution of their Kernel
diagnostics, Acquisition microprocessors attempt to communicate with the
TimeBase microprocessor and the TimeBase and Display microprocessors
attempt to communicate with the Executive microprocessor.
Successful completionof Kernel diagnostics is indicated by the start of
SelfĆTestdiagnostics. A failure of Kernel diagnostics will be indicated by the
message, Dsy Kernel Failure,orComm Testin Progress displaying on the
screen (for Display kernel failures) and/or by a single highĆlow beep and
illuminated menu button indicators (for Executive kernel failures).
SelfĆTestDiagnostics
These begin by displaying SelfĆTestin Progress (when the Display microĆ
processor has successfully communicated with the Executive microprocesĆ
sor). Patternchanges on the display and the flashing of the display indicate
a test in progress. The SelfĆTestdiagnostics are successfully completed
when the CSA 803C returns to normal operation. Any failures cause the CSA
803C to produce a double highĆlow beep, and then to display the Extended
Diagnostics menu on the screen. Faultyfield replaceable units (FRUs) may
then be identified by touching the (?)Help label. If any errors occur,record
the error codes for the failed circuit block(s), and then refer the CSA 803C to
a qualified service person.