5.3. Reading Auto-protection Signatures
On every HARD FAULT protection trip of the amplifier, signature information is stored in its nonvolatile
memory. The 7 most recent auto-protection trip signatures related to the amplifier internal status are
stored there, which you can copy and forward to your dealer for diagnostics.
In order to read the trip signatures, press the OPER button while OFF LINE. You will see the beginning of
the signatures list. Use NEXT and PREV buttons to navigate through 7 pairs of screens. For each
auto-protection trip there is a pair of information screens, beginning with nA... and nB... where:
• "n" is the successive number of the event (Nr. 1 is the latest, Nr. 7 is the oldest one);
• "A" and "B" mark the first and the second part of an information screen pair.
Two lines, three groups by six symbols (36 symbols in total) are to be copied concerning every one of the 7
memorized events from 1A-1B through 7A-7B.
To decode the signatures, see Section 6.6 Troubleshooting.
After every signature listing the tube warm-up time is reset to 150 seconds regardless of
the time being in OFF LINE state.
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