4 - Turn-On Checkout
34
In Case of Trouble
Error Messages
Dc source failure may occur during power-on selftest or during operation. In either case, the display may
show an error message that indicates the reason for the failure.
Selftest Errors
Pressing the
Shift, Error
keys will show the error number. Selftest error messages appear as: ERROR
<n> where "n" is a number listed in the following table. If this occurs, turn the power off and then back
on to see if the error persists. If the error message persists, the dc source requires service.
Table 4-2. Power-On Selftest Errors
Error No.
Failed Test
Error 0
No error
Error 1
Non-volatile RAM RD0 section checksum failed
Error 2
Non-volatile RAM CONFIG section checksum failed
Error 3
Non-volatile RAM CAL section checksum failed
Error 4
Non-volatile RAM STATE section checksum failed
Error 5
Non-volatile RST section checksum failed
Error 10
RAM selftest
Error 11 to 14
VDAC/IDAC selftest 1 to 4
Error 15
OVDAC selftest
Error 80
Digital I/O selftest error
Runtime Error Messages
Appendix C lists other error messages that may appear at runtime. If the front panel display shows
OVLD , this indicates that the output voltage or current is beyond the range of the meter readback
circuit. If the front panel display indicates -- -- -- -- -- -- , an GPIB measurement is in progress.
Line Fuse
If the dc source appears "dead" with a blank display and the fan not running, check your power source to
be certain line voltage is being supplied to the dc source. If the power source is normal, the dc source
fuse may be defective.
1. Turn off the front panel power switch and unplug the power cord.
2. Remove the fuse from the rear panel.
3. If the fuse is defective, replace it with a fuse of the same type (see "Input Connections" in chapter 3).
4. Turn on the dc source and check the operation.
NOTE:
If the dc source has a defective fuse, replace it only once. If it fails again, the dc source
requires service.
