What is the trigger voltage for Pentax AF 500FTZ

NO!
Do not use this flash on your camera without something like this to protect the camera.

The brands use the flash contacts to communicate to the camera. They do not make their flashes compatible with other brands. Don't mix brands. Even if trigger voltageis not an issue, the TTL and AF is not going to function.

I suspect dirty contacts on either lens or body. Clean contacts. Should alleviate problem. This happened to my K100d.

Try cleaning the battery contacts in the camera with a cotton swab lightly moistened with rubbing alcohol.

There is no online diagram you can reference. I would not recommend attampting to open the camera yourself.

If you insist on attempting this, I advise first removing the batteries and leaving it of 24 hours at least. There is no knowing where the high voltage components for the flash unit are, and they will give you a nast electric shock if touched, and if they are accidentelly shorted to any other part of the electronics will destroy the circuitry.

I woud leave this to a photo repair specialist. Preferably your nearest Pentax authorised dealer.

Hello,

I don't own a K10D, but I do own a K100D which I have successfully used both manual focus & auto-focus lenses from my old Pentax stash!

1) If it is a manual focus lens, you need to turn off Autofocus on the body of your K10D. On my K100D, there is a switch on the side of the lens mount that says [-MF or -AF]. "-MF" is manual focus mode & "-AF" is autofocus mode. Since your lens doesn't have autofocus capability, turn it to the "-MF" mode.

Also . . . When I press "Menu" and go to "Custom Setting", I change two settings . . .

1) I change "Using aperture ring" to "Permitted". This allows you to use manual lenses (M lenses) that do not have an auto(exposure) setting, and also lets you use Auto lenses (A, KA, KA2, FA, etc.) in either the Auto or manual aperture setting modes.

2) I change "Fl with S lens used" so that even with a manual focus lens, although I don't have autofocus capability, my K100D beeps and shows a little red square in the viewfinder when I have successfully focused manually!

The K10D should have the same options.

This should get you up and running!

I have had a load of fun with my old lens on my new digital Pentax!

Take care & Happy Imaging!
Glen
:)

If this is a manual focus lens, you will need to do two things (and an optional third thing.)

1) On the side of the camera, you have to switch the focus mode switch from "AF" (Autofocus) to "MF" (Manual focus) . . . Yeah. I know, you probably already did that. <grin>

2) When you press Menu, go to the Custom Setting and change the Allow aperture setting to on, so that the Pentax K100D will then work with manual control of the aperture ring. You need to do this or the K100D will not work with manual exposure lenses (M lenses) or even autoexposure lenses (KA, KA2, FA, etc.) when you move the aperture ring from the "A" position to one of the manual aperture settings!

3) This is optional, but in the Custom Setting you can also turn on the Fl in manual focus mode, so that even though you don't have autofocus capability, you will get a beep indicator when you have successfully managed to manually focus your lens.

I have a few nice manual focus lenses that I have a lot of fun playing with on my K100D.

Take care & Happing Imaging!
Glen
:)

Check the voltage trigger of the flash, if you're under 7vdc. Then you are good to go.

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My camera with the dodgy flash is holidaying in Japan as they sent it to be fixed - not sure how old your camera is but I am trying to see if this is an issue that occurs with the camera model.... given that there are only two of us to date I am thinking that we may have just struck the jackpot :(

To test everything except the camera, just short the contacts on the Wein protector. If the flash fires, the problem is in your camera, and maybe the protector did not do its job as good as expected.

Good luck