5500A
Service Manual
4-14
4-14. Internal Fuse Replacement
In addition to the operator-replaceable line fuse (see “Replacing the Line Fuse”), there
are additional fuses mounted on printed circuit assemblies (PCAs) internal to the 5500A
Calibrator. The location of the internal fuses are summarized in Table 4-1.
Table 4-1. Internal Fuse Locations
Fuse Description Printed Circuit Assembly Reference Quantity Part
Number
W0.125 A, 250 V, Slow
Blow
A5 Synthesized
Impedance
A5F2, A5F3 2 832261
W0.5 A, 250 V, Slow Blow A12 Filter A12F1, A12F2 2 831990
W 2 A, 250 V, Slow Blow A3 Motherboard A3F1 to A3F10 10 806331
4-15. Complete List of Error Messages
The following is a list of the 5500A Calibrator error messages. The error message format
is shown in Table 4-2.
Table 4-2. Error Message Format
Error
Number
(Message Class : Description) Text
characters
0 to 65535 QYE Query Error, caused by
a full input buffer,
unterminated action or
interrupted action
F Error is displayed on the
front panel as it occurs
Up to 36 text
characters
DDE Device-Specific Error,
caused by the 5500A due to
some condition, for example,
overrange
R Error is queued to the
remote interface as it occurs
EXE Execution Error, caused
by an element outside of, or
inconsistent with, the 5500A
capabilities
S Error causes instrument to
go to Standby
CME Command Error,
caused by incorrect command
syntax, unrecognized header,
or parameter of the wrong
type
D Error causes instrument
returns to the power up state
(none) Error is returned to the
initiator only (i.e., local initiator
or remote initiator)
0 (QYE: ) No Error
1 (DDE:FR ) Error queue overflow
100 (DDE:FR D) Inguard not responding (send)
101 (DDE:FR D) Inguard not responding (recv)
102 (DDE:FR D) Lost sync with inguard
103 (DDE:FR ) Invalid guard xing command
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