430ex III-RT burned

[Cannonspdlite]

Hello,

Was curious if anybody had this happen with their 430ex III or has fixed something of this nature.

 

[deebatman316]

Hello Cannonspdlite welocome to the forums and happy holidays. I've never had this happen to my 430EX III-RT. When my 430EX III-RT failed the IR AF Assist Beam was visible in my pictures. Which shouldn't happen at all and was fixed under warranty 3x times for this.

-Demetrius

Happy Holidays

EF 16-35mm F/2.8L III USM, EF 24-70mm F/2.8L II USM, EF 28-135mm F/3.5-5.6 IS USM (Retired), EF 50 F/1.8 STM, EF 85mm F/1.8 USM & EF 70-200mm F/2.8L IS III USM

EOS 40D (Retired) & 5D Mark IV

430EX III-RT, 470EX-AI & 600EX II-RT

[Cannonspdlite]

Thank you for the reply, yes this is a total failure of the PCB board and components. Curious if anybody replaced resistors or am I better off finding a donor board.

[deebatman316]

I would just replace the board. Component level repairs usually aren't done anymore. Canon replaced the shoe first then the board. On the 2nd trip back to Canon they wanted to check the hot shoe on the camera body. Nothing was wrong with the camera body hot shoe. I use multiple Canon speedlites and none have caused this problem. Except the 430EX III-RT I don't know why this one though. After that the IR AF Assist Beam wasn't visible anymore in my pictures. When the AF Assist Beam was set to its default option pre-flashes "Intermittent Flash" the speedlite worked correctly. 

-Demetrius

Happy Holidays

EF 16-35mm F/2.8L III USM, EF 24-70mm F/2.8L II USM, EF 28-135mm F/3.5-5.6 IS USM (Retired), EF 50 F/1.8 STM, EF 85mm F/1.8 USM & EF 70-200mm F/2.8L IS III USM

EOS 40D (Retired) & 5D Mark IV

430EX III-RT, 470EX-AI & 600EX II-RT

[Waddizzle]

Sorry, for your misfortune.

I would consider this device a total loss.  It would cost more to repair than it replace it with a new.  The components that are not showing obvious signs of damage underwent exposure to heat levels beyond their design specifications.

[Cannonspdlite]

Thanks Waddizzle, it looks like it’s isolated to this board, don’t want to have $300 going down the drain, any donor boards that are available that can be tested with? 

[wq9nsc]

Board level repair isn't difficult IF you have a schematic and parts list because with those crispy critter circuit mount components you won't even be able to read the value AND before you replace any parts you need to figure out what failed that caused that component to overheat.

But unless you have service information OR you want to dig into reverse engineering what is being done in that section of the circuit, at minimum you need a donor board from a parts unit.

And be cautious because even these little hot shoe mount flashes store quite a bit of current in their energy storage caps.

Rodger