Question about Dell W5001C 50 in. Plasma HDTV
I knew there is problem on the this IC board LJ41-03078A, I would to what's voltage on the following ic: ZD5022, ZD5021, ZD5018 & ZD5019. Because I can't get a :Service Manual". Could someone help with this issue? Thanks!
I was able to get the y-board LJ 41-03078 from Coretronic in Taiwan. I ordered it from email@example.com. The part costs 263.20 and I was able to get it within a week. The only way to pay for it was to wire the money to Taiwan. My baord has been installed and working great.
Posted on Nov 25, 2008
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Posted on Jan 02, 2017
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This is can be due to poor connections in case the set works on some occasions. If not the main board is a suspect. There is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.
The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.
Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.
Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.
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