thank you. Do you know it for sure?
I must to repair it. By myself.why don't you just send it back for repair instead of blowing 1000s of $?
I am fairly certain that is the part. The "FAH15" as I read it is the mfg date code and or lot code. The "NZ" is the actual part code. If you look throught the datasheet I linked to and find SMBJ100A in the chart you will see a column that shows the part code marking. The attached image is cut from the SMD code book that I have. I did not find anything in a 2 pin package with a code of "FAH" or "FAN".thank you. Do you know it for sure?
This VFD cost about $20K, and I already spent about 3K for parts.
the problem are FAH15NZ and FAH19NZ different. 15 have polarity, and 19 not. both have NZ at the end. On this picture whole board. 6 channels. Each have 1 pcs FAH19NZ (marked red) and 7 FAH15NZ (marked yellow).I am fairly certain that is the part. The "FAH15" as I read it is the mfg date code and or lot code. The "NZ" is the actual part code. If you look throught the datasheet I linked to and find SMBJ100A in the chart you will see a column that shows the part code marking. The attached image is cut from the SMD code book that I have. I did not find anything in a 2 pin package with a code of "FAH" or "FAN".
take a look one more time on this diodes, you think they are same?According to the datasheets that I have found for that "NZ" coded diode, they are unidirectional. Also noted on the datasheet that I posted in post #5, it states that bidirectional diodes do not have a polarity marking. As I was saying before, the "FAH15 / FAH19" is just the date code / mfg marking / posibly lot number. With that in mind I would test the ones you have that show no polarity out of circuit and/or replace all of them, they do not cost that much.
i agree with this. it is an easy thing to do and fastest way to confirm what they really are.... I would test the ones you have that show no polarity out of circuit
check them - they have porarityi agree with this. it is an easy thing to do and fastest way to confirm what they really are.