Trying Out Different IC Part Number
Repairing Electronic equipment can be fun but sometimes when comes to getting the original spare parts, it might takes you lots of time. The only way out is to test out the replacement (substitution) part number and monitor how was the outcome. There is a different between getting a different spec by referring to data book or internet and using a replacement that you totally have no ideas what the spec is! In electronic repair, sometimes we can’t even know what is the spec because we can’t find any data from replacement book or even from internet. The best way is to test it out.
I’ve done this test and would like to share it to you. A Samsung 15″ 153v LCD Monitor came in with dim display and found few e-caps and a FET in an IC with the part number 4600 have problems. Since i have some 4532 IC (power trench ic) I tested it out to replace the 4600. For your information i do not have the 4532 IC data (i mean the volt, amp and etc) but i know that it was a FET built into IC from a schematic diagram i downloaded from internet. It works perfectly fine until few hours later where this replacement IC shorted again. I put back the original 4600 IC and it worked perfectly okay.
If it has been successful, then in the future i would use 4532 IC instead of 4600 (just in case if the 4600 IC have been used up) for replacement purposes. If you have the time you can try out different part numbers in your types of equipment. Write down all of the test and this could really in some way speed up your repair work.