Alpha Radio 87A, Руководство по эксплуатации

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The fault number is determined by adding the values of all lighted LEDs.
Example: (+ = flashing LED, o = dark) + o o + + = fault code number (16 + 2 + 1) = 19. A listing of
fault codes with a brief explanation of each can be found in the following Fault Codes section.
To reset a soft fault:
1. Return the transceiver to receive
2. Switch the ALPHA 87A to STANDBY
3. Correct the condition that caused the fault, and finally
4. Return the ALPHA 87A to OPERATE
Hard Faults
Failures such as HV shorts (extremely high plate current) or bias or control system failure result in
immediate shutdown of amplifier AC power to avoid damage.
To reset a hard fault:
After the cause of the hard (power-off) fault is corrected, simply press the ON button. The fault code
will then be displayed on the SEGMENT LEDs for 30 seconds during warm-up, and then clear
automatically.
You must not turn off the power before the
fault clears, or it will log another hard fault the next time the power is turned on.
Six of the SAME hard fault shutdowns over ANY period of time (with no other kind of Hard fault) will
then put the 87A in Fault 99 which locks it up. This function was put in the amplifier to prevent any
further damage if operation was attempted after a failure had occurred.
If the hard fault persists refer to Chart 2 in Troubleshooting Section.
ALC: In the rare case where faults or distortion recur because exciter output can’t be well controlled,
refer to Section 10, Troubleshooting Suggestions.
Alpha 87A User Manual Rev 2.0