Oceanic OS2001, OS2003, Underwater Flash.
Circuit Diagram
(39K GIF, 1017 x 497 pixels).
Wiring and
PCB layout (32K GIF, 403 x 651 pixels).
PCB (27K GIF,
394 x 385 pixels).
Opening the strobe:
The control knob can be pulled out a short distance, freeing
the switch from the operating lever so that the internal assembly
can slide out.
Replacing NiCds:
Currently available D-size NiCd cells are slightly longer than
the originals, causing failure of the front port O-ring seal
because the port can no longer seat properly. The solution is
to replace the battery with C-size cells. The strobe should still
be capable of more than 200 full power flashes per charge, but
note that the 14 hour charge rate for an industrial grade C-cell
is 220mA, as opposed to 400mA for the original D-cells, which
means that modifications to the charger will be needed.
OS2003 Low output setting:
Main capacitor is 1800mF in full output
mode, 1200mF in low output mode, so
low output energy is 2/3 of full output. The strobe could easily
(and more usefully) be wired to give 1/3 of full output in 'low'
mode.
Inverter Transformer.
The insulation used in the transformer absorbs moisture. If the
strobe has been flooded and the transformer is damp, don't switch
it on. To avoid internal breakdown, remove the transformer and
place it in a vacuum desiccator for several days before attempting
to use it. If this advice fails, the transformer can be rewound
by hand (with new wire and new insulation), but it's a tedious
job. |
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