Question about Promaster 7500DX for Canon TTL Flash

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Promaster 7500dx not firing

Using a Rebel xt and xti. Doesn't matter if camera is in auto or manual, every time I use it with the flash after 4 or 5 shots all of a sudden the flash does not fire underexposing everything. Non-rechargeable batteries, the flash is fully charged, the flash indicator is also seen in the viewfinder but the flash does not fire. It is not tightened too tight so I don't know what is wrong. I have two of those flashes and both do the same thing. I never get more than 5 shots off before it does it..then I have to turn off the flash and camera..take the flash off the hotshoe (or bracket) and put it back on, power on everything and then it will work for 5 more shots..maybe just 4 and mess up again, quits firing. I contacted Promaster many times and they are not any help..I have a 580ex II and it NEVER has done this, plus a Promaster 5950 I use for my film camera works flawlessly but the 7500 DX is problem ridden..anyone got a solution?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: My snaps are underexposed with 350D camera and 580EX TTL

Set camera:

Single shot mode not servo/C modes
Focus sensor set for center
Make sure exp. comp is not set on -(minus) side.
Make sure your subject is locked on and not moving out of the autofocus (center) sensor.

atdlee@netzero.com

Posted on Jan 03, 2008

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SOURCE: Canon SPEEDLITE 580EX - How do I replace the hotshoe mount?

These instructions are for the 550ex and I imagine that the bodies of the flash units are the same.

As with any project, make sure to get a good workspace with plenty of light where you won't drop any screws and lose them...

1) There are 4 screws on the bottom of the flash unit that you'll want to unscrew first. Carefully tilt back the bottom section away from the red filter which covers the "eye".

2) There is a set of wires going to a white harness in the piece you just tilted off which you can carefully disconnect with a small flathead screwdriver working it on either side.

3) The same type of harness attaches another set of wires but this one is just inside the body of the flash in the cavity you just opened up. This one is a bit wider and you should undo that harness in the same, careful manner.

4) Next, you have to remove the master/slave switch which is attached with two small screws that you'll need to carefully undo. The actual switch is attached to the tiny board you are unscrewing. There is a plate covering that switch that is the piece you actually push when you want to switch it. That piece will come out when you take the actual switch out so remember which direction it went.

5) Now you should have exposed four small screws as you look straight down into the piece you're working with. These screws hold on the shoe you're replacing. With some decent force against the screws, carefully unscrew them. These don't come out very easily so you want to make sure you have the right sized screwdriver that fits and that you're applying some downward force. MAKE SURE you don't strip the head on these screws.

6) Turn the whole piece so that the shoe is facing upwards. Now you can carefully pull off the shoe. Make sure to not lose the loose spring that is under this thing. You'll see that there are 5 prongs sticking up, a horizontal metal piece, and a small rod looking piece with a spring that fits over it. Take note of how these all go so you can put the new one on with those pieces in the right places.

7) Put the new piece on and screw everything back in the reverse order. Voila! You just saved yourself a bunch of money and hassle. Thanks for the tip on where to get that piece, by the way, I had been looking around for it.

Posted on Dec 27, 2008

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SOURCE: Promaster 7500dx problem

Send the flash back to Promster for repair, they are real good about fixing or replacing products.

Posted on Nov 03, 2009

  • 3 Answers

SOURCE: Promaster 7500 D Digital Flash usage with Nikon D70

you need to go to your cameras menu and set your flash function to m ( no to ttl) set it in full M and then it works hope it works that works for me i had the same problem

Posted on Oct 05, 2010

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SOURCE: Cannot get my Promaster 7500DX (for Nikon) to sync

go to your cameras menu and set your flash mode to the section of full manual and then click that, never on ttl, and set you flash also in the leter M and it will works

Posted on Oct 05, 2010

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hi sneakers
the camera is firing the flash to help it auto focus,the only way to stop it find an area of the picture that has more light/contrast or switch to manual focusing.
regards
ian

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