5-6
5
TABLE 5-2 TROUBLESHOOTING GUIDE
Possible
Symptom
Fault
Action or Check
Unit will not turn on
Power cord not
Push power cord into DC
plugged in
receptacle
Power at AC outlet
Check outlet and power
adapter
High output lines
Disconnect output signals
shorted to ground
and reapply power to test the
unit. If it powers on, remove
the short or put resistors in the
offending circuit path.
Unit shows a blinking
Self test fault
Check Self Test errors in
LED at power turn
Table 5-1
on
ERR LED on at
Flash configuration
Use *CLS to clear the LED.
power turn-on
data lost
Use CAL:DATE command to
accept default configuration
and clear the error so the ERR
LED will not come on at next
power-on time.
Reload your configuration and
use the *SAV 0 command
to save the new configuration.
Unit fails to respond
No delay after an
Provide a 70 ms minimum
or responds wrong
the address or
delay after changing 4863's
after an address change address mode
GPIB address or address mode
or address mode
change
setting.
change
Insufficient delay
Program running on faster CPU
or in a compiled form runs
faster. Change to a called time
function and test CPU clock.
String data transfer
Wrong GPIB
Send string data to next higher
fails
address
primary address or to secondary
address 01.
Read string data from next
higher primary address or from
secondary address 01.
