Question about Heating & Cooling
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Posted on Jan 02, 2017
Went to a free website with industry professionals sharing their knowledge instead of signing up for more ways to spend what little money I have.
Posted on Nov 01, 2009
There shoud be a big elcetrolytic cap connecto the bridge rectifier output, ti should have about 150~160 vdc on that cap, if you do not have the dc on the secondary side, ti may be because it sees short circuits (you will hear fainted ticking sound), the power supply should have 5v and 12v at all time. Try heating up the primary circuits with hair dryer to see if will kick on. Post some picture will help, see example here: http://s807.photobucket.com/home/budm/allalbums
Posted on Jan 17, 2010
The resistor is acting as a fuse and will continue to blow until you fix the REAL problem. LIKELY the filter capacitor(s) beyond the bridge rectifier are failing. One needs to use test equipment to measure the current through the resistor and see if it is reasonable. The capacitors can heal briefly and then start to short. One should also check the rectifier in operation with an oscilloscope as one diode could intermittently short.
Posted on May 04, 2011
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