Hi,

would anyone have a schematic for A12 PCB only, please. I have a dead short on the -6V rail, cannot locate the root cause.

Regards
Gerald
VK3GM

Hi Gerald,

Do you have access to a thermal camera? A thermal signature may provide a clue as to the area of the short.

bob

Hi Bob,

Great idea. I am sure a friend has one.

Regards

Gerald

Hi, can I suggest contacting milan.vasic@... who might be able to assist you.?
I believe the E4400-6002 is common in E4421B too.
Maxwell?
VK5AC

Hi Maxwell,

Thanks for the info.

just sent a PM to Milan.

Regard
Gerald
VK3GM

On Sat, May 18, 2024 at 08:54 AM, Four Designs Company wrote:

Do you have access to a thermal camera? A thermal signature may provide a clue as to the area of the short.

If you can power this board up while examining it, if it's all just low voltage, just try feeling for hot components. If that doesn't work, try flooding it with some sort of low boiling point solvent, like IPA or Naptha, and watch for any area where the solvent seems to be trying to move away. This can be more obvious than you'd expect.

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