As you might have known, the flash tube is filled with gas.
While the flash is being charged, the charge current is limited
and the gas becomes deionized. At the charging voltage, the
internal resistance of the gas in the flash tube is high enough
to prevent any flow of current from the main capacitor. However,
by applying a trigger voltage, the gas will be ionized and
becomes conducting, allowing the main capacitor to discharge
rapidly through the gas. As a result, a brief flash of light is
generated. The FZ-10 has an ISO hotshoe and uses the ISO 10330
based standard (i.e., less than 24 volts). See page 85 of your
manual. A trigger voltage is frequently generated by a spark
coil mechanism which is usually triggered by the shutter
contacts in the camera. This voltage is positioned on the low-
voltage side of the spark coil so that it only appears on the
flash contact. In this way, the user will not be injured
accidentally, and the camera will not be damaged. This is
especially important because digital cameras