JX 2300 Trouble shooting


Errors are displaid on the current loop CMS, and the flashes are OK

The current loop CMS lets flow a 13mA (approx) current through all the sets.
Each set open the current loop each time a flash occurs.

  • Verify whether the current value is correctly adjusted (back panel potmeter on the CMS)
  • Connect an oscilloscope on the CMS (back panel connectors on the CMS) and visualise such a curve :

    This curve shows a normal current loop for a SFLS of 10 flashes.
    (This quantity has been chosen to simplify the picture)

    First, the master set create a 5ms pulse to reset the flash counter of the CMS.
    Then the master Flashes and create a 10ms pulse to inform of the flash success.
    Then the eight slaves do the same pulse to inform each flash success.
    Finally, the last slave (as configured according to User manual on page 8) create a 15ms pulse to inform each flash success.

    Each pulse appears according to the delay between each flash (ie 14ms or 66ms or 267ms)

    When a flash problem occurs on the SFLS (ie. the set nbr 4 on the picture) the relevant pulse is not generated, allowing the CMS to display the fault

    Unfortunately, a bad configuration of the switches can generate bad curves, even when the Flashes are not faulty by themselves.

    This curve shows only 9 pulses on a current loop for a SFLS of 10 flashes !
    The problem is that one of the slaves has not a 14 ms delay but has 0 ms delay (see User manual on pages 7 to 9)

    Practically, two sets of the SFLS flashes simultaneously, and the CMS count a lack of one pulse, so it indicates the last one faulty.
    Nevertheless, verify each slave configuration because each of them (apart the last one on this example) can be the responsible of the anomaly.

    In this case, the set nbr 4 is configured as a last slave instead of a "normal" slave. (see User manual on page 7)

    This makes it generates a pulse of 15ms duration (normally indicating a last slave set) which mask the 4ms inter pulse delay (14 ms - 10 ms = 4 ms)
    This can be seen only on a 14 ms delay SFLS.

If these trials have not solved the problem, please call your reseller.