Older Flashguns.
Any slight recovery will be just that.
Capacitor replacement is a common thing, just make sure that the correct operating voltage for the capacitor is known. Easy to do when the original is removed as the capacity and voltage will be on the component.

Best regards
(sorry, I'm no techie, someone else will have to be more specific about what exactly not to touch!)
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
And this is the usual place where someone always adds that you have to be extremely careful not to touch something inside that is going to give you a nasty shock....
I wouldn't advise disassembly. You have to be extremely careful, the capacitors are huge and are able to store huge amounts of energy (usually at very high voltages). They store the trigger voltage for the tube (which is always hundreds of volts irrespective of the voltage across the hotshoe contacts).
Electrolytic capacitors are polarised (marked on the can), you need high quality and precise soldering anywhere near them. A 'normal' electrolytic capacitor is the size of two LR44 batteries, these things are the size of C cell batteries.
I had a tiddler flashgun stop working - GN 28, despite my attempts to drain the charge (the fault was between the TEST switch and the cap), I received a huge belt from the capacitor (along with beautiful iridescent blue sparks...).
PPG Flickr
The capacitor can be safely discharged with a 1M ohm 1/4W resistor on fly leads.
Best regards
I'm going to charge up my NI-MH C cells today and give that a try. If that doesn't work then does anybody know where I can get the two guns fixed. (New capacitors) or whatever it takes. I'll be back later today OR tomorrow to let you all know how it goes.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.
Yes I'm fine thanks.
.
Just was concerned you may be sitting at A&E with a flashgun welded to your hand

Peter
My Flickr page
Enough of my problems.
Iv'e charged up a set of "C" cells and put them in a TR Powerpack plugged it into my 400t switched it on and now I must wait and see if it brings the flash to life again???.
As I asked yesterday if anybody knows where I can get them fixed please let me know.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.
Peter
My Flickr page
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver
There's a company in London that might be able to help link. Downside is pricing. Most of the repair companies will be wanting around sixty pounds or so.
Best regards
I'll recharge all 12 batteries and try again tomorrow. In the meantime thanks for the link. I'll look it up now.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.
Thanks to all of you for your suggestions. Now it's trial and error to see if I can make them work all wired together with the 280 gun.
Great joy in the fundimold.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.
Who's a happy bunny then.
Once again thank you all for helping a retired "MECHANICAL" Engineer with an electrical problem.
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.
vic cross
Plus Member
Kettering Northants
CHEERS Vic.
Born again biker with lots of Pentax bits. Every day I wake up is a good day. I'm so old I don't even buy green bananas.