Re: LCD 19" BENQ T905 problems
Yes, the K cap is what Krankshaft is referring to.
Yes, that is correct. Excellent job. 400mV (millivolts) indicates that the dual diode is good. A good diode should read between 0.4V and 0.7V.
Krankshaft writes to desolder (remove all the old solder) and resolder with new solder.
Another analogy (I spelled it right this time) might be painting a door.
You have a door that needs to be painted. For the most part the paint looks good, but it could use some touch up.
The lazy way is to just put another coat over it without cleaning it or stripping it down to the wood. This is akin to reflow new solder on top of the old solder.
The "proper" way to paint this door is to remove all the old paint, sand it down so that is smooth, apply protective coat, and then paint it. This is akin to removing the old solder and adding new fresh solder.
Yes, resolder those ? marked items.
PS. You have made huge progress in the last 24 hours. Keep up the good work.
Originally posted by capullaco
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About the dual diodes, yes they are.Theyre named "DXXX" and they have this printed on one side:
YG902C2
-->|--|<-- CI
40 121
I managed to unstick them from the heatsink.
But how do I test them? I tried this but I dont know if its correct:
- Black (COM) on 2nd pin RED on 3rd: 400
- RED on 1st pin BLACK on 2nd: 400
Those values are with the diode setting ( -->|) of the polimeter. Other combinations didnt show results.
YG902C2
-->|--|<-- CI
40 121
I managed to unstick them from the heatsink.
But how do I test them? I tried this but I dont know if its correct:
- Black (COM) on 2nd pin RED on 3rd: 400
- RED on 1st pin BLACK on 2nd: 400
Those values are with the diode setting ( -->|) of the polimeter. Other combinations didnt show results.
The things I need to resolder, I just need to unsolder them and sold again with new tin or is there any other action involved? I ask because the soldering on those things seems ok , at least on looks.
One more thing, should I resolder those things marked as '?' on the 6th pic?
One more thing, should I resolder those things marked as '?' on the 6th pic?
Another analogy (I spelled it right this time) might be painting a door.
You have a door that needs to be painted. For the most part the paint looks good, but it could use some touch up.
The lazy way is to just put another coat over it without cleaning it or stripping it down to the wood. This is akin to reflow new solder on top of the old solder.
The "proper" way to paint this door is to remove all the old paint, sand it down so that is smooth, apply protective coat, and then paint it. This is akin to removing the old solder and adding new fresh solder.
Yes, resolder those ? marked items.
PS. You have made huge progress in the last 24 hours. Keep up the good work.
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