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Why xenon lamp not flashing on topcon non mydriatic camera

Non mydriatic retinalcamera model TRC-NW5S have trouble with xenon lamp trigger circuit (280 volt power to lamp ok)please send me a schematic diagram of g1 and g2 boards if any or describe me how xenon triggers

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Posted on Jan 02, 2017

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SOURCE: SB800 firing but not syncing??

hi, i had this problem also but found a way around it . what is happening, is that the sb800 preflashes when you shoot and triggers any external flash heads a fraction of a second just before the camera takes the picture. you see the lights being trigered but it the light doesn't register on camera. ( preflasing asseses the amount of light needed for the correct exposure and is a feature on newer models of flashes ). what you can do to avoid this problem is to either use a radio trigger and slave, or set your flash to su-4 mode ,which cancels the preflashing. if you press the select button on the flash .you go into the menu \ scroll up and down till you reach the icon of two flash heads . press the select again and change from " off " to su-4 .that will cancel the preflashing and your other lights will be in sync with your camera . if you get confused go to page 76 in the sb800 manual it explains everything there / hope this was helpful. good luck charles yacoub

Posted on Sep 14, 2007

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SOURCE: sony tv model klv-32u100m dead standby 5 volts ok

most probably is (a) board ..very common on these models.These boards are made by RoHM.These are similar and used in maganvox,philips and others..Very common breakdown

Posted on Nov 30, 2007

  • 30 Answers

SOURCE: Vivitar trigger voltage

Yes, you can. The flash has a low-voltage trigger circuit.

Posted on Nov 14, 2008

  • 30 Answers

SOURCE: camera and flash gun trigger voltage

Hi Syd,
Vivitar 2800 and 2800D are two different flashes. The first is an old flash, having high trigger voltage, which, as you will see, still can be used with your Fuji. The second is a member of modern flashes, having a low-voltage release. Manufacturers specify the highest applicable voltage at the trigger (hotshoe or PC) terminal; at most digital cameras it reaches several hundred volts.I believe, this is, what your seller was asking. As far as I know, Fuji doesn't mention this value in the user manual of the Finepix 9500, but I met reports of people, who called Fuji and asked that and the answer was 400 volts!
So the short answer is: buy any wireless trigger if you have the 2800D, and tell the seller the flash has about 200 volts if your flash is an older 2800.
I wonder if you did already use your flash with your Fuji?

Posted on Nov 28, 2008

  • 4 Answers

SOURCE: wireless flash trigger for vivitar 283

I purchased the Wein Slave Foot. The metal foot is designed to repair the plastic foot that, apparently, is prone to breakage. Mine is not broken, but I purchased the Slave Foot because the blurb stated that it would make my unit serve as a remote slave.

The setup works fine with my Sony A700 using either the built-in flash or in combination with my proprietary external Sony flash.

I have just purchased another used 283 and will be ordering the Wein Slave Foot from B&H in the morning.


Posted on Jan 03, 2009

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Either way the camera needs to go to an authorised Canon service outlet for diagnosis and repair. Or you could just put the repair costs towards a far more useful external flash unit.

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Using Vivitar 3200A flash gun on a DSLR is risky for the following reason. The trigger voltage of a DSLR at flash hot shoe that takes it to its TTL (through the lens) circuit is less than 10 volts, it is about 6 to 8 volts in the recent DSLRs. The trigger voltage generated by Vivitar 3200A at full charge flashing is around 180 volts (max). That is a fatal dose for a sensitive DSLR TTL circuit. This high voltage flash gun will work endlessly, the only damage is to the TTL flash circuit. When you attach a TTL flash to the DSLR after using Vivitar 3200A for sometime, your TTL flash will not communicate with your camera. It will be just another ordinary flash without any auto functions. There is a Wein adapter that you can fix b/w your cameral hot shoe and the vivitar flash gun that is said to reduce the trigger voltage that passes into the camera. Try it if you get it. Without this gadget it is better not to use non recommended and non TTL flashes on latest DSLRs.

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