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-(I'm self taught so please bare with me if I don't make sense or if I have to ask anyone for clarification)-
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I have a couple of Dell 2001FP's I'm working on that have no backlight problems. Actually it's the inverters (AMBIT T05I031.xx). I have taken them all out and here's my conclusion.
Most of the fuses (F1) were blown. It's a really small guy and says "L F 3.5A". So they're 3.5 amps, but do you think it's 12v or 20v? 20 volts is what is coming in off the adapter, and I don't know if this is stepped down to 12v for the inverter. I can check it, but if someone knows for a fact, please say so.
Most of the capacitors were blown. Each board has two caps, 220 uF, 35 v. I will replace them all.
While probing around with my DMM, I discovered a discrepancy in some of the points on different units. Particularly on an IC labeled "4600 AD3349". There's one pin that is hooked to the cap. I put my red lead on it and black across the other side (the other side has 4 pins which are all on the same solder pad). Most will read 5.xx MOhms. Some read Short. And one reads 8+ MOhms. I assume the later 2 readings are the bad ones. Do you know what this chip is? Some of the boards have a different number on this chip. It's "4600 AD4H1Z".
What else should I check and how can I do it with just a DMM?
Also, would you recommend repairing these components; or buying a universal 6 lamp inverter? (the actual correct boards cost like $100, universal is like $25!)
Thanks,
Chris
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