Question about Panasonic PV-C2780 27 in. TV/VCR Combo
Unit not coming on after power outage. Found 1.6A 125V fuse blown.
First, check whether it is the fuse in the home wiring that is out. You should plug something else into the outlet to see if the outlet is still functioning.
Some electronic equipment has a reset switch (fuse) on the back panel. Others have a special sequence of buttons on the panel that will act as a reset. Check your user manual to see whether your unit has such a switch or reset sequence.
Posted on Jun 20, 2009
Be very careful! Standard microwaves have 2100volt capacitors and commercial ones 4000 volt capacitors.
*Decharge your capacitor(s) before doing diagnostics*.
You are now testing the high voltage side (as it works on convection). The main components are a transformer, a capacitor, a diode and a magnetron (havent seen a triac in a panasonic residential). If you have a proper meter that can test uf, decharge the capacitor, then test the capacitor, if it reads 0, you need a new capacitor (10$ used typically, 14$ new from ebay). To test the magnetron, decharge the capacitor first, remove the spade connections, test each leg to the frame of the microwave... if it shows measurable resistance, the magnetron is bad. The transformer is not something you test as I personally dont have a 4000 volt meter. If the diode, the magnetron and capacitor are okay, then the transformer is bad. To eliminate any other function, disconnect the low voltage to the transformer run a micropower cycle and check the fuse.
Hope that helps. My first instinct is the capacitor.
Posted on Dec 19, 2009
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