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Alphonso



Joined: 16 Jan 2007
Posts: 294
Alphonso
LocoDelAssembly wrote:

Alphonso, no I don't have a megger. But still, could you tell me how to test the isolation of the transformers? The two times this happened there was some overheated copper insulation smell (but no smoke).


Without the higher voltage of a megger it may seem alright using a multimeter. Also you could try measuring the connection on the right as shown in the mirrored image to GND.


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Post 06 Aug 2011, 14:29
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LocoDelAssembly
Your code has a bug


Joined: 06 May 2005
Posts: 4633
Location: Argentina
LocoDelAssembly
gabiz_ro wrote:

You say that in normal condition,no extra isolation,problem seems related to cdrom connection
No, when I tested this, the PCB earth pads were isolated, but not the chassis, and since the CDROM connects the GND pins to ground the PSU discharged through the GND wires.

When using a plug adapter to bypass the earthing I can plug in either way, yes, but live line is already in the correct position.

Alphonso, I get nothing wrong when using the multimeter unfortunately Sad

I guess this will continue to be an open mystery until I get proper diagnostic tools and electronics skills... Thank you all for all the patience
Post 06 Aug 2011, 16:49
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