iFixit - Answers With Device "Canon Camera Accessory"

Canon Macro Ring Lite MR-14EX: Making a clicking sound and pilot light not coming on

Wed, 14 Jan 2026 11:22:18 -0700

When I turn in my ring flash unit only the lamp and screen light work. There is a clicking sound coming from the unit but nothing comes up on the menu screen. The pilot light doesn’t come on and the flash doesnt trigger

Canon Speedlite 430EX II: لماذا لا توجد مقاطع فيديو

Sun, 02 Apr 2023 14:36:05 -0700

لماذا لا توجد مقاطع فيديو

Canon Speedlite 430EX II: . Will not fire with button. Will not change from ettl mode.

Thu, 03 Nov 2022 06:56:38 -0700

Cannot change modes stuck on ettl. Will not fire from pilot button

Canon Speedlite 430EX: Speedlite 430EX I - Capacitor/Transformer/Inverter Troubleshooting.

Thu, 21 Nov 2024 16:31:55 -0700

Hi there,

I'm repairing a Speedlite 430EX I and I need help on part values.

I have the service manual/schematics, but Canon does not list the individual parts, and instead wants you to buy the entire pcb which they've discontinued.

My guess is it's only a capacitor or transformer that needs replacing.

The rest of the flash turns on and seems fine.

There's a loud whining noise when I turn it on. And the flash does not fire when I press the Pilot button.

1. I want to ask if someone can test the C2 capacitor that stores the flash charge and see what the required uF is, as well as the rated voltage.

2. If someone can tell me a part number for the T1 transformer, as well as the gauge of winding wire and how many turns. The schematic shows it has 3 windings.

If you can tell me as well what the voltage is that is delivered from the battery before it reaches the transformer, and what it is on each of the two windings.

This should give us a reasonable idea of what the transformer spec is to either find a replacement or wind our own.

I've also read it might be the Q6 or Q7 inverter:

Why is my flash making a high pitched whine constantly?

In that case, can someone give me the part number of Q6 and Q7 or tell me whether either is PNP or NPN, as well as C B E tests between legs of each out of circuit?

Any advice?

Thank you! I will share any solutions I find here.

⟐ Edited November 21, 2024 at 16:31 MST

Canon Speedlite 430EX II: Why is my flash not reloading power and thus, not firing?

Fri, 23 Feb 2018 08:51:18 -0700

Hello All,

I have a problem with my Canon 430EX II Speedlite. It doesn't want to fire anymore. But , to my frustration and juste to give me some hope, it fires occasionally (usually one time only just after powering it up but not always). It looks like it doesn't charge the capacitors anymore... or something like that.

What do you think could be the cause ? I would like to be able to repair it. The tube isn't broken because it still fires. I don't understand.

Thanks,

Martin.

⟐ Edited by author February 23, 2018 at 8:51 MST

Canon Speedlite 430EX II: Always full flash. Even when manual 1/64 flash power

Wed, 30 Aug 2017 23:21:55 -0700

Will make always full flash, no matter what settings used. Manual or TTL. Always 1/1 power.

Canon Speedlite 430EX: How to fix the bottom part of my eos flashgun

Thu, 21 Nov 2024 16:31:31 -0700

How to chang the bottom part of my eos 430ex flashgun

⟐ Edited November 21, 2024 at 16:31 MST

Canon Camera Accessory: My falsh goes off everytime when not in use.

Thu, 05 May 2016 10:21:40 -0700

Every time I stop using my flash while still on my camera, it goes off and when I want to use it I have to turn off first then turn it on for it to work.

Canon Speedlite 580EX II: Flash canon 580 exii enciende pero no dispara,

Thu, 21 Nov 2024 16:49:13 -0700

my flash 580 exii fell to the floor, now on but not light fires.

mi flash cayó al piso, aora aunque enciende no dispara la luz.

⟐ Edited November 21, 2024 at 16:49 MST