[matiasjuarez1993]

Hello, i have a fanuc power supply( A16B-1212-0901) that had a blown fuse on 24E. I only have the board, i dont own the machine, so I want to fix the power supply first and then fix the machine( it obviously have a short on the 24E line, could be the I/O board or some switch, proximity sensor, Estop). Im trying to power it up with 220vac in the input and with a wire im doing the work of the butttons(on-off) keeping off connected( between a2 and a3 pins) and touchiong on for a moment ( between pin a1 and a3) all of it in the CP4 conector. I am meassuring 0v in all test points( 5v -15 +15 24v 24e). I dont known wich one is the auxiliary power supply to feed the circuit to check there the voltages, but I meassure the voltages in all the caps and nothing. I only have some voltages in the P0 vg1 vg2 test points but they are wxtremely low like 1v around each one. I dont hear nor relay clamping or transformer oscilating ( a few kHz noise). I dont know where to start because i dont have schematics. Some of you may have it? Ive seen aroud the internet there is one but its 110USD and for me its impossible to pay at least before knowing if I can fix it (it doubvles the price cause im in Argentina and to buy from here is different). If somebody can help me Ill apreciate that. The only help I have is a little diagram for a power supply that look a like. Thanks!

[memoryman]

Which control is it used in?

[matiasjuarez1993]

Its on a Series 18-TB TAKAMAZ fanuc

[matiasjuarez1993]

a02b 0216 b502 is the fanuc cabinet

[memoryman]

I probably have that; email me: [email protected]

[matiasjuarez1993]

Hello everybody, i coud find the bad one with the help of memoryman. It was a transformer labeled 0340. It had the primary winding open. There might have been a peak of tension or something in the 24E output that broke it.

[phucrobusl]

Pm me [email protected]

[tld70]

Hello,
I have the same Problem,
the transformer 0340 has a open winding, but there also is a M11 device near the transformer, it looks like a transistor.
But i dont know what this is? There is no label on it.
Hope somebody can help.
Thomas

[bravernoe]

Hello,
Can you attach a photo?

[tld70]

Its the M11 device.
I believe it is a 5V voltage regulator.

[matiasjuarez1993]

Hello,
I have the same Problem,
the transformer 0340 has a open winding, but there also is a M11 device near the transformer, it looks like a transistor.
But i dont know what this is? There is no label on it.
Hope somebody can help.
Thomas

5v regulator, an78l05

[tld70]

OK thank you,
now I m looking for the transformer,
I found some in China.
I will let you know if it works again.
Thomas

[tld70]

Hello,
I changed the transformer, the 78L05 and all C's
After switch on, the green LED was on and a short time later a little smoke
comes on near the transformer, I dont see exact where.
I m afraid to switch on again.
Any Ideas?
Best regards
Thomas