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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Sony KVM1621 16" crt TV
Hi, i'm italian so be patient with my language... one day i've opened a tv which i suspected in cold solderings,
but i've done a stupid error when discharging the big cap, i put the discharger in the wrong place, in the scheme below i marked C and D the right point for the Cap and A - B the wrong place i done. http://web.tiscali.it/bps_impianti/schema%20Tv.GIF After that tv brokes and i can only say which measurements i've done on the IC and the transistor and the correct values from scheme sheet: IC pins my measure scheme meas. 1 -41,x -41,2 2 222 0,3 3 303 268 4 9 0 5 -33 -33 on the transistor B 9 0 C 222 0,3 E 0 0 transistor and diodes are not short or open.. i've found that the two resistors that goes from + of the big cap (point c) to the pin 2 of the ic , in series, one measure 200k instead of 270k the other 115k instead of 120k (this maybe my tester inaccurate) , thankyou, bye... |
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Sony KVM1621 16" crt TV
IC pins my measure scheme meas.
1 -41,x -41,2 2 222 0,3 3 303 268 4 9 0 5 -33 -33 sorry pin 2 is 303v instead 0,3 and pin 3 is about 230v i don't remember well.. |
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