ICS ELECTRONICS 4863 Manual page 127

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