| Electronics > Repair |
| Agilent 34401A Bubble on PCB ... can it be saved ? (SOLVED) |
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| The_Spectrum.A_idiot:
Dear All All the parts arrived , Now I would like your recommendation for the hot air station setup , how should I go hot and high output to remove the components fast ? or slow/ medium heat , medium flow and take my time and slowly ramp up the temperature until the solder liquefies ? Big , small nozzle ? lastly I will kapton tape everything around that area and hope for the best , lots of flux , and hope for the best. Let me know if you have any other tips and tricks how to deal with hot air . Thank you in advance |
| wraper:
All of that can be soldered by dual wielding soldering irons, soldering tweezers or using low melting point alloy. I would avoid using hot air on PCB that already popped as much as possible to minimize chances of further damage. |
| The_Spectrum.A_idiot:
Dear All , We kind of made it , now I have 2 errors. 612 and 618. replaced : U201 Q202 CR201 Q202-210 Q201 Q211 CR203 Q202 What now ? Thank you for your help in advance |
| Kleinstein:
From the description the errors 612 and 618 are essentially the same, a problem with the 500 nA current source or 10 M divider. A way to check is to measure the 500 nA current externally. If needed with a resistor and voltmeter. Another point to check could be the resistor readings for the 10 M range (e.g. check 1 M and 4.7 M). |
| The_Spectrum.A_idiot:
okay so shorting and measuring the μA output : 000. ohm range -999.4 μA 0.1k range - 999.3μA 00.1k range -99.46μA 000.1k range -9.81μA 0.1M range -4.83μΑ 00,1M range - 0.41μΑ 000,1Μ range -0,42μΑ |
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