Products > Test Equipment

Advantest R6243 teardown and repare

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aronake:

--- Quote from: DEHiCKA on March 19, 2016, 12:13:26 pm ---Just revived couple of those beasts!
3 cracked resistors and one TI's OPA627 opamp. The opamp was tough to figure out, it has inconsistent resistance disconnect inside it's case  :o
Not to mention OPA627 costs freaking $25 per piece. Funny fact, chinese even sell fake OPA627's wich have AD744 silicon under the hood: Original vs. Fake
Thanks, AD nowadays makes it's $5 analog - ADA4627

BTW, anyone has some luck with Cal menu?
I don't have "Cal Switch Set" on mine units. GPIB command XENT also missing, but X? is present, so maybe Cal entering is hidden on earlier firmwares?
Any thoughts?

--- End quote ---

What error message did it show when faulty? which 3 resistors replaced?

aronake:

--- Quote from: DEHiCKA on March 19, 2016, 12:13:26 pm ---Just revived couple of those beasts!
3 cracked resistors and one TI's OPA627 opamp. The opamp was tough to figure out, it has inconsistent resistance disconnect inside it's case  :o
Not to mention OPA627 costs freaking $25 per piece. Funny fact, chinese even sell fake OPA627's wich have AD744 silicon under the hood: Original vs. Fake
Thanks, AD nowadays makes it's $5 analog - ADA4627

BTW, anyone has some luck with Cal menu?
I don't have "Cal Switch Set" on mine units. GPIB command XENT also missing, but X? is present, so maybe Cal entering is hidden on earlier firmwares?
Any thoughts?

--- End quote ---

Long time ago, but do you remember, have a picture or can make a picture of which resistors and which OPA627 was changed?

vinovino:

--- Quote from: DEHiCKA on March 19, 2016, 12:13:26 pm ---Just revived couple of those beasts!
3 cracked resistors and one TI's OPA627 opamp. The opamp was tough to figure out, it has inconsistent resistance disconnect inside it's case  :o
Not to mention OPA627 costs freaking $25 per piece. Funny fact, chinese even sell fake OPA627's wich have AD744 silicon under the hood: Original vs. Fake
Thanks, AD nowadays makes it's $5 analog - ADA4627

BTW, anyone has some luck with Cal menu?
I don't have "Cal Switch Set" on mine units. GPIB command XENT also missing, but X? is present, so maybe Cal entering is hidden on earlier firmwares?
Any thoughts?

--- End quote ---


What self-test error did OPA627 resolve?

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