Originally Posted by chipset
Thank you so much for your inputs. I have two 50pz80u sets with the same 10 blink problem. I've been studying the schematics and smps design for months, but your posts are the first breakthrough I've had yet!
I traced everything back to the MCx01 modules after testing every discrete mosfet, diode, cap, photocoupler, ect. on the board... and after reading your posts last night I tried a quick "shot in the dark" to put in the 4.7k resistor (an ingenious fix too... this looks so sound it could be part of the standard design!). So far this did not work, so I'll go back with your other checks on the tea1611t and report what comes up. Meanwhile, if you have any other info on the mcx01 modules (like any schematics you derived?) I would be very grateful to learn more.
btw... did you test the 1uf smd with an esr meter? I'm wondering if I should invest in an esr meter before I continue....
Again, thanks a million!
I never checked with an esr meter because the cap is leaking. The esr would be looking for greater than usual impedance, vs less than usual. I may try that next time just for grins, but I wouldn't suggest investing in a meter.
If you do the voltage check with the board on a bench, you should be able to tell if too much current is being drawn through the 4.3k resistor (or 4.7k). Then remove the cap and check again. Most likely, it will test correctly now.
Sorry, the only schematics I have are in my head (and not too clear there
Good luck with it, you're almost there!