Question about Zenith B32A24Z 32" TV
Check the solder joints on the vertical output IC. I am not sure if that model has the PIP module, but if it does then resolder those connectors, too.
Posted on Jun 29, 2007
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Posted on Jan 02, 2017
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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.
The fault is the FAILURE OF THE SOLDER IN THE VERTICAL IC OF THE TV.
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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